20041530 Ver 1_Complete File_20050404

O?O? W AT QG
D ni I -1
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
June 29, 2005
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project.
Approval of Storm water Management Plan
Dear Mr. Huggins:
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ Project # 04-1530
Mecklenburg County
On June 29, 2005 the Division of Water Quality (DWQ) received the revised storm water management plan
prepared by your engineer, Mr. Bryan Metzler, of Turnbull Sigmon Design, to comply with the conditions of 401
Water Quality Certification issued on March 9, 2005, and modified on June 6, 2005.
The Plan has been reviewed'and satisfies the storm water management conditions of the 401. The structural storm
water practices as approved by DWQ as well as drainage patters must be maintained in perpetuity. In addition, you
should obtain or otherwise comply with any other required federal, state or local permits before you go ahead with
your project including (but not limited to) Erosion and Sediment Control, Buffer Rules and Non-discharge
regulations.
No changes to the structural storm water practices shall be made without written authorization from the Division of
Water Quality. Storm water easements shall be recorded for a distance of at least 10 feet on each side of all storm
water conveyances on all lots containing these structures including future access for maintenance. The storm water
easements shall allow for the ability to maintain the structures, perform corrective actions as described above and
shall provide protection of the structures from potential alternations in the future. The authorization to proceed with
your proposed impacts or to conduct impacts to waters as depicted in your application and as authorized by the
Certification shall expire upon expiration of the 404 Permit.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act and the
Yadkin River Basin protection rule as described within 15A NCAC 2H .0500. If you have any questions, please
telephone Sam A. Aghimien, at 919-733-3574.
Sincerely,
Al n W. Klimek, P.E.
CBKlsaa
cc: USACE Asheville Regulatory Field Office
DWQ Mooresville Regional Office
File Copy
Central Files
Bryan Metzler, 1001 Morehead Square Drive, # 530 Charlotte, NC.28203
Adam Karagosian, P.O.35624, Charlotte, NC. 28235
Filename: 04-1530 Mallard C.H.S. SWM Approval, 6-29-05
401 Oversight/Express Review Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet htto://h2o.enr.state.nc.us/ncwetlands
Nn U iCarolina
Nal rally
An Equal Opportunity/Affirmative Action Employer- 50% Recycledl10% Post Consumer Paper

Project No. DWO Q Li - ?3d 6 ?q ?S (to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review :
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name: MAt-L.0,9-Lto GILMau- SGUODL
Contact Person: RI2.-iAg C tAt17mLtrrZ Phone Number: (Wq ) 52_1- 6 Soo
For projects with multiple basins, specify which basin this worksheet applies to: 4/, ww= 00okrr`[ it+L
Basin Bottom Elevation 172.0 ft.
Permanent Pool Elevation q Z. 6 ft.
Temporary Pool Elevation Tzs . 86 ft.
Permanent Pool Surface Area.. Z3??__ sq. ft.
Drainage Area y 62il ac.
Impervious Area '2.0. S ac.
Permanent Pool Volume T '3 63 cu. ft.
Temporary Pool Volumed cu. ft.
Forebay Volume S 6 q Z cu. ft.
SA/DA used
Diameter of Orifice 3.Q r in.
(average elevation of the floor of the basin)
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(combined volume of main basin and forebay)
(volume 'detained on top of the permanent pool)
(surface area to drainage area ratio)
(draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. I fa requirement has not been met, attach an explanation of
why.
Applicants Initials
I3C tM The temporary pool controls runoff from the I inch storm event.
Qa?? The basin length to width ratio is greater than 3:1. N e?v m??K
Q CV11 , The basin side slopes are no steeper than 3:1. /I
Btrk A submerged and vegetated perimeter shelf at less than 6:1 is provided. (V/?
J!Z Vegetation to the permanent pool elevation is specified.
lku- An emergency drain is provided to drain the basin.
,aew The permanent pool depth is between 3 and 6 feet (required minimum"of 3 feet).
%0& The temporary pool draws down in 2 to 5 days.
B c lk, The forebay volume is approximately equal to 20% of the total basin volume.
lacy.. Sediment storage is provided in the permanent pool.
jjc_vK Access is provided for maintenance.
Bcy- A minimum 30-foot vegetative filter is provided at the outlet.
sol. A site specific operation and maintenance (O&M) plan is provided.
13cvti A vegetation management/mowing schedule is provided in the O&M plan.
Zey\ Semi-annual inspections are specified in the O&M plan.
'6Gv-_ A debris check is specified in the O&M plan to be performed after every storm event.
ZCV^ A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
VB(e-% A responsible party is designated in the O&M plan.
FORM SWG100 09/97 Page I of 1
Project Name: Mallard C.II.S
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN: I REQUIRED DESIGN:
6/29/2005
elevations 3.1 average depth status
Bottom of Basin (ft) 720
Permanent Pool (ft) 726 6 ft. depth ok
Temporary Pool (ft) 728.86 2.86 ft. depth ok
areas
Permanent Pool SA (sq ft) 23600 23329 sq. ft. ok
Drainage Area (ac) 46.1 23517, based on avg depth ok
Impervious Area (ac) 20.5 44.5 % -
volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 75500 75341 cu. ft. ok
Forebay (cu ft) 15692 21.3 % ok
other parameters
SA/DA 1.09 1.16 -
Orifice Diameter (in) 3 0.28 cfs drawdown -
Design Rainfall (in) 1 3.1 day drawdown ok
Linear Interpolation of Correct SAIDA***
6 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 40 1.05 1.053766525
Project Impervious 44.5 1.16 1.17;
Next Highest 50 1.3 1.31632161
3 ft
9V--
r ro??
1.08
1.24
1.43
4
?la?l?
Project Name: Mallard C.II.S
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN: 1
6/29/2005
elevations
Bottom of Basin (ft) 720
Permanent Pool (ft) 726
Temporary Pool (ft) 728.86
areas
Permanent Pool SA (sq ft) 23600
Drainage Area (ac) 46.1
Impervious Area (ac) 20.5
volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 75500
Forebay (cu ft) 15692
other parameters
SA/DA 1.09
Orifice Diameter (in) 3
Design Rainfall (in) 1
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 40
Project Impervious 44.5
Next Highest 50
gy-
REQUIRED DESIGN:
3.1 average depth status
6 ft. depth ok
2.86 ft. depth ok
23329 sq. ft. ok
23517' based on avg depth ok
44.5 % -
75341 cu. ft. ok
21.3 % ok
1.16 -
0.28 cfs drawdown -
3.1 day drawdown ok
6 ft. Permanent Pool Depth
SA/DA fron (Avg. Depth)
1.05 1.053766525
1.16 1.17'.
1.3 1.31632161
3 ft
r yyJN
1.08
1.24
1.43
4
(0a I ?
Project Name: Mallard C.II.S
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN. 1 REQUIRED DESIGN:
6/29/2005
elevations 3.1:average depth status
Bottom of Basin (ft) 720
Permanent Pool (ft) 726 6 ft. depth ok
Temporary Pool (ft) 728.86 2.86 ft. depth ok
areas
Permanent Pool SA (sq ft)
23600
23329 sq. ft.
ok
Drainage Area (ac) 46.1 23517.,' based on avg depth ok
Impervious Area (ac) 20.5 44.5 % -

volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 75500 75341 cu. ft. ok-
Forebay (cu ft) 15692 21.3 % ok
other parameters
SA/DA 1.09 1.16 -
Orifice Diameter (in) 3 0.28 cfs drawdown -
Design Rainfall (in) 1 3.1 day drawdown ok
Linear Interpolation of Correct SAIDA * * *
6 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 40 1.05 1.053766525 1.08
Project Impervious 44.5 1.16 1.17: 1.24
Next Highest 50 1.3 1.31632161 1.43
3 ft 4
ec, ? 6 ,

O?O? W AT ,?PG
r
Mr. Mike Huggins
Charlotte-Mecklenburg School District
3301 Stafford Drive
Charlotte, NC 28202
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 6, 2005
Re: Mallard Creek High School
Mecklenburg County
DWQ #04-1530; USACE Action ID. No. 200430232
APPROVAL of 401 Water Quality Certification; Modified
Dear Mr. Huggins:
Attached hereto is a copy of Certification No. 3503 issued to Charlotte-Mecklenburg Schools,
dated March 9, 2005 and as modified on June 6, 2005 (condition number 6). In addition, you
should get any other federal, state or local permits before you go ahead with your project
including (but not limited to) Solid Waste, Sediment and Erosion Control, Stormwater, Dam
Safety, Non-discharge and Water Supply Watershed regulations.
If we can be of further assistance, do not hesitate to contact us.
Sincerely,
AW K/j rd
Attachments: Certificate of Completion
Klimek, P.E.
cc: Amanda Jones, U.S. Army Corps of Engineers, AshevilleRegulatory Field Office
Wilmington District, USACOE
Alan Johnson, DWQ, Mooresville Regional Office
Doug Miller, DLR Mooresville Regional Office
File Copy
Central Files
Sean Calloway; Turnbull Sigmon Design; 1001 Morehead Square Dr, Suite 530, Charlotte,
NC 28203
Adam Karagosian; Ralph Whitehead and Associates, P.O. Box 35624, Charlotte, NC
28235
Filename: 041530MallardCreekHS(Mecklenburg)IC
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Intemet: htto://h2o.enr.state.nc.us/ncwetlands
One hCaro
NMato a1lina
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Mallard Creek High School
Page 2 of 5
June 6, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws
92-500 and 95-217 of the United States and subject to the North Carolina Division of Water
Quality (DWQ) Regulations in 15 NCAC 2H, Section .0500 to Charlotte-Mecklenburg Schools to
fill 0.610 acre of jurisdictional wetlands and 674 linear feet of streams in the Yadkin River Basin,
associated with the construction of Mallard Creek High School in Mecklenburg County, North
Carolina, pursuant to an application filed on the 5`h day of October of 2004, and in additional
correspondence received December 28, 2004 and January 11, 2005.
The application and supporting documentation provides adequate assurance that the proposed
work will not result in a violation of applicable Water Quality Standards and discharge
guidelines. Therefore, the State of North Carolina certifies that this activity will not violate the
applicable portions of Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if
conducted in accordance with the application, the supporting documentation, and conditions
hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and
as described in the Public Notice with additional correspondence as noted above. If the project
is changed, prior to notification a new application for a new Certification is required. If the
property is sold, the new owner must be given a copy of the Certification and approval letter and
is thereby responsible for complying with all conditions of this Certification. Any new owner
must notify the Division and request the Certification be issued in their name. Should wetland or
stream fill be requested in the future, additional compensatory mitigation may be required as
described in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site
plan result in a change in stream or wetland impact or an increase in impervious surfaces, the
DWQ shall be notified in writing and a new application for 401 Certification may be required.
For this approval to be valid, compliance with the conditions listed below is required.
Conditions of Certification:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and
general conditions of this Certification (or Isolated Wetland Permit) are met. No other
impacts are approved including incidental impacts:
Amount Approved Plan Location or Reference
Units
Stream 674 (feet) Proposed Mallard Creek H.S
- Impact Areas - Component
dated 12/22/04
404/CAMA Wetlands 0.61 acres See above
Sediment and Erosion Control:
2. Erosion and sediment control practices must be in full compliance with all specifications
governing the proper design, installation and operation and maintenance of such Best
Management Practices in order to protect surface waters standards:

Mallard Creek High School
Page 4 of 5
June 6, 2005
Express Permitting Unit (2321,Crabtree Blvd., Suite 250, Raleigh, NC, 27604) within 90
days of the issuance of the 401 Water Quality Certification. The stormwater
management plans shall be approved in writing by this Office before all of the impacts
specified in this Certification are completed. This plan must contain provisions for diffuse
flow from Drainage Basin # 2 across the protected SWMM buffer along Stony Creek as
outlined in Condition Number 8 of this Certification. You have the option of using the
Express Review Program for expedited approval of these plans. If you propose to use
the Express Review Program, remember to include the appropriate fee with the plan.
The stormwater management plan must include plans, specifications, and worksheets
for stormwater management facilities that are appropriate for the surface water
classification and designed to remove at least 85% TSS according to the most recent
version of the NC DENR Stormwater Best Management Practices Manual. These
facilities must be designed to treat the runoff from the entire project, unless otherwise
explicitly approved by the Division of Water Quality. Also, before any permanent
building is occupied at the subject site, the facilities (as approved by this Office) shall be
constructed and operational, and the stormwater management plan (as approved by this
Office) shall be implemented. The structural stormwater practices as approved by this
Office as well as drainage patterns must be maintained in perpetuity. No changes to the
structural stormwater practices shall be made without written authorization from the
Division of Water Quality.
Road Crossings:
7.
Culverts required for this project shall be installed in such a manner that the original
stream profiles are not altered. Existing stream dimensions (including the cross section
dimensions, pattern, and longitudinal profile) must be maintained above and below
locations of each culvert. Culverts shall be designed and installed to allow for aquatic life
movement as well as to prevent head cutting of the streams. If any of the existing pipes
are or become perched, the appropriate stream grade shall be re-established or, if the
pipes installed in a perched manner, the pipes shall be removed and re-installed correctly.
Placement of culverts and other structures in waters, streams, and wetlands must be
placed below the elevation of the streambed by one foot for all culverts with a diameter
greater than 48 inches, and 20 percent of the culvert diameter for culverts having a
diameter less than 48 inches, to allow low flow passage of water and aquatic life. Design
and placement of culverts and other structures including temporary erosion control
measures shall not be conducted in a manner that may result in dis-equilibrium of
wetlands or streambeds or banks, adjacent to or upstream and down stream of the above
structures. The applicant is required to provide evidence that the equilibrium shall be
maintained if requested in writing by DWQ.
Other conditions:
8. Diffuse Flow (No Review)
All constructed stormwater conveyance outlets shall be directed and maintained as
diffuse flow at non-erosive velocities through the protected SWMM stream buffers such
that it will not re-concentrate before discharging into a stream. If this is not possible, it
Mallard Creek High School
Page 3 of 5
June 6, 2005
a. The erosion and sediment control measures for the project must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Sediment and Erosion Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and erosion
control measures must be such that they equal, or exceed, the requirements
specified in the most recent version of the North Carolina Sediment and Erosion
Control Manual. The devices shall be maintained on all construction sites, borrow
sites, and waste pile (spoil) projects, including contractor-owned or leased borrow
pits associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas
beyond the footprint of the impacts depicted in the 404/401 Permit Application. All
construction activities, including the design, installation, operation, and maintenance of
sediment and erosion control Best Management Practices, shall be performed so that no
violations of state water quality standards, statutes, or rules occur;
4. Sediment and erosion control measures shall not be placed in wetlands or waters to the
maximum extent practicable. If placement of sediment and erosion control devices in
wetlands and waters is unavoidable, they shall be removed and the natural grade restored
within six months of the date that the Division of Land Resources has released the project;
Continuing Compliance:
5. Charlotte-Mecklenburg Schools shall conduct construction activities in a manner
consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate
requirements of State law and federal law. If the Division determines that such
standards or laws are not being met (including the failure to sustain a designated or
achieved use) or that State or federal law is being violated, or that further conditions are
necessary to assure compliance, the Division may reevaluate and modify this
Certification to include conditions appropriate to assure compliance with such standards
and requirements in accordance with 15A NCAC 2H.0507(d). Before modifying the
Certification, the Division shall notify Charlotte-Mecklenburg Schools and the US Army
Corps of Engineers, provide public notice in accordance with 15A NCAC 2H.0503 and
provide opportunity for public hearing in accordance with 15A NCAC 2H.0504. Any new
or revised conditions shall be provided to Charlotte-Mecklenburg Schools in writing, shall
be provided to the United States Army Corps of Engineers for reference in any Permit
issued pursuant to Section 404 of the Clean Water Act, and shall also become
conditions of the 404 Permit for the project;
Stormwater Management
6. Written Stormwater Management Plan (Final Plan Needed)
A final, written stormwater management plan (including a signed and notarized
Operation and Maintenance Agreement) shall be submitted to the 401 Oversight and
r.
Mallard Creek High School
Page 5 of 5
June 6, 2005
may be necessary to provide stormwater facilities that meet DWQ's design criteria. This
may require additional approval from this Office.
9. All Erosion and Sediment Control measures shall be located outside the 35 foot
protected SWMM stream buffer.
10. A wooded buffer at least 15 (fifteen) feet wide shall be planted adjacent to Stream # 3
after construction in order to ensure that the stream bank remains stable. Additional
written approval is required from DWQ for this planting plan including a monitoring plan
for tree survival.
Also, this approval to proceed with your proposed impacts or to conduct impacts to
waters as depicted in your application shall expire upon expiration of the 404 or CAMA
Permit.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon
written request within sixty (60) days following receipt of this Certification. This request must be
in the form of a written petition conforming to Chapter 150B of the North Carolina General
Statutes and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
N.C. 27699-6714. If modifications are made to an original Certification, you have the right to an
adjudicatory hearing on the modifications upon written request within sixty (60) days following
receipt of the Certification. Unless such demands are made, this Certification shall be final and
binding.
This the 6th day of June 2005
DIVISION OF WATER QUALITY
AW K/jrd
,
I n 7mm E.
CERTIFICATION NUMBER 3503, modified
W AT ?qpG
D 7
> r
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimck, P.E. Director
Division of Water Quality
March 9, 2005
Mr. Mike Huggins
Charlotte-Mecklenburg School District
3301 Stafford Drive
Charlotte, NC 28202
Re: Mallard Creek High School
Mecklenburg County
DWQ #04-1530; USACE Action ID. No. 200430232
APPROVAL of 401 Water Quality Certification
Dear Mr. Huggins:
Attached hereto is a copy of Certification No. 3503 issued to Charlotte-Mecklenburg Schools,
dated March 9, 2005. In addition, you should get any other federal, state or local permits before
you go ahead with your project including (but not limited to) Solid Waste, Sediment and Erosion
Control, Stormwater, Dam Safety, Non-discharge and Water Supply Watershed regulations.
If we can be of further assistance, do not hesitate to contact us.
AW K/jrd
Attachments: Certificate of Completion
Sincerely,
r
Klim , P.E.
cc: Amanda Jones, U.S. Army Corps of Engineers, AshevilleRegulatory Field Office
Wilmington District, USACOE
Alan Johnson, DWQ, Mooresville Regional Office
Doug Miller, DLR Mooresville Regional Office
File Copy
Central Files
Sean Calloway; Turnbull Sigmon Design; 1001 Morehead Square Dr, Suite 530, Charlotte,
NC 28203
Adam Karagosian; Ralph Whitehead and Associates, P.O. Box 35624, Charlotte, NC
28235
Filename: 041530MallardCreekHS(Mecklenburg)IC
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Bou'evard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands
None Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Mallard Creek High School
Page 2 of 5
March 9, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws
92-500 and 95-217 of the United States and subject to the North Carolina Division of Water
Quality (DWQ) Regulations in 15 NCAC 2H, Section .0500 to Charlotte-Mecklenburg Schools to
fill 0.610 acre of jurisdictional wetlands and 674 linear feet of streams in the Yadkin River Basin,
associated with the construction of Mallard Creek High School in Mecklenburg County, North
Carolina, pursuant to an application filed on the 5'" day of October of 2004, and in additional
correspondence received December 28, 2004 and January 11, 2005.
The application and supporting documentation provides adequate assurance that the proposed
work will not result in a violation of applicable Water Quality Standards and discharge
guidelines. Therefore, the State of North Carolina certifies that this activity will not violate the
applicable portions of Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if
conducted in accordance with the application, the supporting documentation, and conditions
hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and
as described in the Public Notice with additional correspondence as noted above. If the project
is changed, prior to notification a new application for a new Certification is required. If the
property is sold, the new owner must be given a copy of the Certification and approval letter and
is thereby responsible for complying with all conditions of this Certification. Any new owner
must notify the Division and request the Certification be issued in their name. Should wetland or
stream fill be requested in the future, additional compensatory mitigation may be required as
described in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site
plan result in a change in stream or wetland impact or an increase in impervious surfaces, the
DWQ shall be notified in writing and a new application for 401 Certification may be required.
For this approval to be valid, compliance with the conditions listed below is required.
Conditions of Certification:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and
general conditions of this Certification (or Isolated Wetland Permit) are met. No other
impacts are approved including incidental impacts:
Amount Approved Plan Location or Reference
Units
Stream 674 (feet) Proposed Mallard Creek H.S
- Impact Areas - Component
dated 12/22/04
404/CAMA Wetlands 0.61 acres See above
Sediment and Erosion Control:
2. Erosion and sediment control practices must be in full compliance with all specifications
governing the proper design, installation and operation and maintenance of such Best
Management Practices in order to protect surface waters standards:
Mallard Creek High School
Page 3 of 5
March 9, 2005
a. The erosion and sediment control measures for the project must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Sediment and Erosion Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and erosion
control measures must be such that they equal, or exceed, the requirements
specified in the most recent version of the North Carolina Sediment and Erosion
Control Manual. The devices shall be maintained on all construction sites, borrow
sites, and waste pile (spoil) projects, including contractor-owned or leased borrow
pits associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas
beyond the footprint of the impacts depicted in the 404/401 Permit Application. All
construction activities, including the design, installation, operation, and maintenance of
sediment and erosion control Best Management Practices, shall be performed so that no
violations of state water quality standards, statutes, or rules occur;
4. Sediment and erosion control measures shall not be placed in wetlands or waters to the
maximum extent practicable. If placement of sediment and erosion control devices in
wetlands and waters is unavoidable, they shall be removed and the natural grade restored
within six months of the date that the Division of Land Resources has released the project;
Continuing Compliance:
5. Charlotte-Mecklenburg Schools shall conduct construction activities in a manner
consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate
requirements of State law and federal law. If the Division determines that such
standards or laws are not being met (including the failure to sustain a designated or
achieved use) or that State or federal law is being violated, or that further conditions are
necessary to assure compliance, the Division may reevaluate and modify this
Certification to include conditions appropriate to assure compliance with such standards
and requirements in accordance with 15A NCAC 2H.0507(d). Before modifying the
Certification, the Division shall notify Charlotte-Mecklenburg Schools and the US Army
Corps of Engineers, provide public notice in accordance with 15A NCAC 2H.0503 and
provide opportunity for public hearing in accordance with 15A NCAC 21-1.0504. Any new
or revised conditions shall be provided to Charlotte-Mecklenburg Schools in writing, shall
be provided to the United States Army Corps of Engineers for reference in any Permit
issued pursuant to Section 404 of the Clean Water Act, and shall also become
conditions of the 404 Permit for the project;
Stormwater Management
6. Written Stormwater Management Plan (Final Plan Needed)
A final, written stormwater management plan (including a signed and notarized
Operation and Maintenance Agreement) shall be submitted to the 401 Oversight and
Mallard Creek High School
Page 4 of 5
March 9, 2005
Express Permitting Unit (2321 Crabtree Blvd., Suite 250, Raleigh, NC, 27604) within 90
days of the issuance of the 401 Water Quality Certification. The stormwater
management plans shall be approved in writing by this Office before the impacts
specified in this Certification occur. This plan must contain provisions for diffuse flow
from Drainage Basin # 2 across the protected SWMM buffer along Stony Creek as
outlined in Condition Number 8 of this Certification. You have the option of using the
Express Review Program for expedited approval of these plans. If you propose to use
the Express Review Program, remember to include the appropriate fee with the plan.
The stormwater management plan must include plans, specifications, and worksheets
for stormwater management facilities that are appropriate for the surface water
classification and designed to remove at least 85% TSS according to the most recent
version of the NC DENR Stormwater Best Management Practices Manual. These
facilities must be designed to treat the runoff from the entire project, unless otherwise
explicitly approved by the Division of Water Quality. Also, before any permanent
building is occupied at the subject site, the facilities (as approved by this Office) shall be
constructed and operational, and the stormwater management plan (as approved by this
Office) shall be implemented. The structural stormwater practices as approved by this
Office as well as drainage patterns must be maintained in perpetuity. No changes to the
structural stormwater practices shall be made without written authorization from the
Division of Water Quality.
Road Crossings:
7.
Culverts required for this project shall be installed in such a manner that the original
stream profiles are not altered. Existing stream dimensions (including the cross section
dimensions, pattern, and longitudinal profile) must be maintained above and below
locations of each culvert. Culverts shall be designed and installed to allow for aquatic life
movement as well as to prevent head cutting of the streams. If any of the existing pipes
are or become perched, the appropriate stream grade shall be re-established or, if the
pipes installed in a perched manner, the pipes shall be removed and re-installed correctly.
Placement of culverts and other structures in waters, streams, and wetlands must be
placed below the elevation of the streambed by one foot for all culverts with a diameter
greater than 48 inches, and 20 percent of the culvert diameter for culverts having a
diameter less than 48 inches, to allow low flow passage of water and aquatic life. Design
and placement of culverts and other structures including temporary erosion control
measures shall not be conducted in a manner that may result in dis-equilibrium of
wetlands or streambeds or banks, adjacent to or upstream and down stream of the above
structures. The applicant is required to provide evidence that the equilibrium shall be
maintained if requested in writing by DWQ.
Other conditions:
8. Diffuse Flow (No Review)
All constructed stormwater conveyance outlets shall be directed and maintained as
diffuse flow at non-erosive velocities through the protected SWMM stream buffers such
that it will not re-concentrate before discharging into a stream. If this is not possible, it
Mallard Creek High School
Page 5 of 5
March 9, 2005
may be necessary to provide stormwater facilities that meet DWQ's design criteria. This
may require additional approval from this Office.
9. All Erosion and Sediment Control measures shall be located outside the 35 foot
protected SWMM stream buffer.
10.
10. A wooded buffer at least 15 (fifteen) feet wide shall be planted adjacent to Stream # 3
after construction in order to ensure that the stream bank remains stable. Additional
written approval is required from DWQ for this planting plan including a monitoring plan
for tree survival.
Also, this approval to proceed with your proposed impacts or to conduct impacts to
waters as depicted in your application shall expire upon expiration of the 404 or CAMA
Permit.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon
written request within sixty (60) days following receipt of this Certification. This request must be
in the form of a written petition conforming to Chapter 1508 of the North Carolina General
Statutes and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
N.C. 27699-6714. If modifications are made to an original Certification, you have the right to an
adjudicatory hearing on the modifications upon written request within sixty (60) days following
receipt of the Certification. Unless such demands are made, this Certification shall be final and
binding.
This the 9th day of March 2005
DIVISION OF WATER QUALITY
AW K/j rd
e.K
CERTIFICATION NUMBER 3503
?OF WATF9o Michael F. Easley, Governor
William G. Ross Jr., Secretary
UJ? North Carolina Department of Environment and Natural Resources
O .? Alan W. Klimek, P.E. Director
Division of Water Quality
April 6, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 Netlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed High School. The?fbllowing additional information is needed to enable us continue with the
reviews of your application:
• A new 401 Extended Detention wetland, and Level Spreaders`vorksheets of all ponds.
• The ponds are to meet the requirements of BMP, and the 85% TSS removal for all runoffs.
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
• Clarifications of the project actual area from the original 85 acres that was proposed.
• A summary of the present project states, status, activities, current impacts area amounts, and streams impacts if
any vs original stage at the initial application request, and a final mitigation plans and amounts.
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
• Provisions for the possible archaeological sites, Historical preservations, the threatened or endangered Species that
may be within the projects area, if any.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
CBK/SAA
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Intemet ha ://h2o.enr.state.nc.us/ncwctIands
04-1530 stormwater on hold Mallard Creek High School 4-6-05
Nt`
o Carolina
Aurally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
?QF W ATF90 Michael F. Easley, Governor
Wa`Q G William G. Ross Jr., Secretary
W r North Carolina Department of Environment and Natural Resources
O - ^- Alan W. Klimek, P.E. Director
Division of Water Quality
April 7, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED ,
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed HiglrSchool. The following additional information is needed to enable us continue with the
reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• The ponds are to meet the requirements of DENR's BMP.manual, and 85% TSS removal for all
runoffs. \
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
Clarification of the project actual area from the original 85 acres that was proposed.
• A summary of the present project states, status, activities, current impacts area amounts, and streams
impacts if any vs original stage at the initial application request.
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 4-7-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone]/ Internet: httt ://h2o.enr.state.no.us/ncwetlands
None Carolina
Ntumily
An Equal Opportunity/Affirmative Action Employer - 5001o Recycled/10% Post Consumer Paper
?QF W ATE9Q Michael F. Easley, Governor
\Q (, William G. Ross Jr., Secretary
7 North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
May 31, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed, to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP# 1, surface area, temporary pool, orifice diameter;,and the draw down did not meet requirements.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 5-31-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] /Internet: httv://h2o.enr.state.nc.us/ncwetIands
One
Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
?QF W ATF9Q Michael F. Easley, Governor
William G. Ross Jr., Secretary
Cq ? r North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 2, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP## 1, surface area, temporary pool, orifice diameter;,,and the draw down did not meet requirements.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-2-05
4010versight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] / Internet: http://h2o,enr.state.nc.us/ncwetlinds
None Carolina
Nturally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
?0F W ATF9Q Michael F. Easley, Governor
?O ^ G William G. Ross Jr., Secretary
? 1 North Carolina Department of Environment and Natural Resources
> u
- Alan W. Klimek, P.E. Director
Division of Water Quality
June 10, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Storm water Management Plan
Dear Mr. Higgins:
On June 6, 2005, the Division'of Water Quality (DWQ) received your revised Storm water management plan dated
June 6, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The following
additional information is needed to enable us continue with the reviews of your application:
• New 401 Detention wetland worksheets.
• Pond # 1, surface area, temporary pool, orifice, and the draw down did not meet design requirements.
• Accounts for the entire total project area drainage basins, and flow rates.
• A summary of the present project states, status, impacts area amounts, and mitigation status.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Storm water Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBKlsaa
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-10-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: ham://h2o.enr.state.ncds/h2o.enr.state.ncds
None Carolina
atnmallif
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper

TURNBULL © SIGAION DESIGN
TO:
Cyndi Karoly
NCDENR - DWQ/Wetlands/401 Cert. Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, NC 27604-2260
TEL: [phone]
DATE: June 30, 2005
REFERENCE: 03055 - Mallard Creek
High School
TRANSMITTED VIA:
? COURIER
? DIAIL
® OVERNIGHT
? BYIIAND
ACTION:
® FOR APPROVAL
? FOR LOUR USE
? AS REQUESTED
? FOR REVIEIVAND COMMENT
? APPROVED ASSUBMITTED
? APPROVED AS NOTED
? RETURNED FOR CORRECTIONS
CC:
n-7-1r)
3
'QC)C)4 k5
WE ARE SENDING:
® ATTACHED ? UNDER SEPARATE COVER
ITEM DATE DESCRIPTION
2 6/30/05 Stormwater Management Plans
COMMENTS:
Cyndi,
Thank you for taking the time to meet with us yesterday. I have attached
the revised plans that we discussed. Please call if you have any questions
or require additional information. Thank you
Bryan C. Metzler, PE
Principal
Land 1001 Morehead Square Drive Phone: 70¢-529-6500
Development Suite 530 Fax: [phone]
Design Services Charlotte, NC 28203 turnbullsiigmon.com
?%f'\
' 'v
ti005
TRANSMITTAL
TURNBULL a S IGMON D E S I G N
Ms. Cyndi B. Karoly o
NCDENR - Division of Water Quality
401 Oversight / Express Review Permits Unit
Raleigh, NC 27604
Re: Mallard Creek High School Storm Water Management Plato
DWQ Project Number 04-1530 `il?
June 22, 2005 JUN 3 ? 2005 J
?YETLANDSAND S1'C Yi'A R IT tX4CH
Ms. Karoly:
This letter is in response to your request for additional information dated June 10th, 2005.
It is my position that the information requested has previously been submitted to your
department. I would appreciate the opportunity to meet with Sam Aghimien and yourself
to resolve your concerns on this project.
The following is a list of your comments and my response to each.
Comment: New Detention Wetland Worksheets.
Response: The project consists of one wet detention basin. I have provided the DWQ
with a new 401 wet detention basin worksheet for the proposed pond. No extended
detention or pocket wetlands are proposed on the project. The requested worksheet
does not apply.
Comment: Pond #1, surface area, temporary pool, orifice and drawdown did not meet
design requirements.
Response: Per telephone conversations with Sam the only issue with the proposed 1
pond is the size of the proposed drawdown orifice. Sam has indicated that the Division
of Water Quality would like to see a 1" orifice. I have provi ed calculations that illustratedid 4r
e osed 4.25" orifice meets t e 2-5 day requirement for drawdown. If a 1" orifice
were used the drawdown time would exceed 5 days. I would appreciate a more detailed ?•
reason why the submitted calculations are not approved. I believe that this can be i W d 44m
accomplished by a face-to-face meeting. ,,
3"? 2W
Comment: Accounts for the entire total project are drainage basins, and flow rates.
Response: An overall plan showing the total parcel, total project and drainage areas for
the project area has been submitted.
Comments: A summary of the present project states, status, impacts area amounts, and
mitigation status.
Response: A project summary has previously been submitted. Since this summary was
issued there have been changes in the project status. Currently, construction is
underway. The wetland impacts for the project are as rreviously approved on the 401
Water Quality Certification for the project dated June 6 h 2005. The City of Charlotte is

Land 1001 Morehead Square Dri.e Phone: [phone]
Derclopment Suite 530 Far: 704.522.o882
Drsi;nSrr,ires Charlotte, AC 28203 turn bullsigmon. com
currently reviewing the final memorandum of understanding to accept payment for
mitigation into the City's umbrella bank.
Thank you for your time and assistance with this project. Please contact me at 704-529-
6500 to set up a meeting time. I am eager to resolve the above issues and look forward
to meeting you.
Sincerely,
g,,
Bryan C. Metzler, PE
Principal
Cc: File
Brian Sigmon; Turnbull Sigmon Design
Mike Higgins; Charlotte-Mecklenburg Schools
Project No. DWQ (to be provided by DIVA)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQStormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : T-A o"t-L_ cX IF-Izz) G aV- Sil4oot .
Contact Person: ?jC? t,?a t C M t_-t u Lr Q Phone Number: (7611 ) 4%2-`1-65'00
For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation x.20 ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 2 G ft. (elevation of the orifice invert out)
Temporary Pool Elevation 7?. , a6 ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area 22,Z6`i sq. ft. (water surface area at permanent pool elevation)
Drainage Area q 6 •1 ac. (on-site and off-site drainage to the basin)
Impervious Area 'Lo• ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume -4 *? "I-63 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 719 4,5' cu. ft. (volume detained on top of the permanent pool)
Forebay Volume 19 6 T2- cu. ft.
SA/DA used 1.01 (surface area to drainage area ratio)
Diameter of Orifice 14.2.6 in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. Ifa requirement has not been met, attach an explanation of
why.
Applicants Initials
BcfA The temporary pool controls runoff from the 1 inch storm event.
uc v%A The basin length to width ratio is greater than 3:1.
_ ig, GyA-. The basin side slopes are no steeper than 3:1.
et,?kN A submerged and vegetated perimeter shelf at less than 6:1 is provided.
G:,K Vegetation to the permanent pool elevation is specified.
?« An emergency drain is provided to drain the basin.
,a e- v- The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
V_,CJA The temporary pool draws down in 2 to 5 days.
_Rc t+A The forebay volume is approximately equal to 20% of the total basin volume.
Ucv-. Sediment storage is provided in the permanent pool.
sr-0. Access is provided for maintenance.
Bev- A minimum 30-foot vegetative filter is provided at the outlet.
V11- '? A site specific operation and maintenance (O&M) plan is provided.
'BCw A vegetation management/mowing schedule is provided in the O&M plan.
'Es CA Semi-annual inspections are specified in the O&M plan.
'?_4Gv- A debris check is specified in the O&M plan to be performed after every storm event.
te?+ A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
VBGe-% A responsible party is designated in the O&M plan.
FORM SWG100 09/97 Page 1 of 1
DWQ Project
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following infi
Project Name
Contact Person: %2', FNai ??-?_
Level Spreader ID:. W&;-r cz la-- 001' -=-r e 19 &A 14
Liave` Svm?a`r--
Level Spreader Length go _ ft.
Drainage Area 1, 1, 1 ac.
Impervious Area 7.jo.5 ac.
Maximum Filter Strip/Buffer Slope S , %
grass
Max. Discharge from a 10 Year Storm _10S) cfs
Max. Discharge to Level Spreader t cfs
Filter StriplBuffer Vegetation
r?i33e?-
Fa??-T w1
Phone Number: (70LI) 57-g -
It -J-
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(6% for forested, leaf littler cover, 8% for thick ground cover)*
(thick ground cover or grass, canopied forest with leaf litter
groundcover)
Pre-treatment or Bypass Method ?c?! T?-'?lwK''
tAJ? ?s?h
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
` t1h Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
Pre-Form Scour Holes are on flat slopes only
No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
Al ! Bypass method is specified (if applicable) and plan details and calculations are provided
Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
V4 he No structures are located in protected buffers.
t (? Plan details for the bypass and outlets are provided.
The operation and maintenance agreement includes annual erosion and vegetation repair.
}.? The operation and maintenance agreement signed and notarized by the responsible party is provided.
* Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area.
OF W ATF,9 Michael F. Easley, Governor
o
?
61 i
S

!' 7?
>D ecretary
Will
am G. Ross Jr.,
North Carolina Department of Environment and Natural Resources
A? .
Alan W. Klimek, P.E. Director
Division of Water Quality
April 6, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed High School. The following additional information is needed to enable us continue with the
reviews of your application:
• A new 401 Extended Detention wetland, and Level Spreaders worksheets of all ponds.
• The ponds are to meet the requirements of BMP, and the 85% TSS removal for all runoffs.
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
• Clarifications of the project actual area from the original 85 acres that was proposed.
• A summary of the present project states, status, activities, current impacts area amounts, and streams impacts if
any vs original stage at the initial application request, and a final mitigation plans and amounts.
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
• Provisions for the possible archaeological sites, Historical preservations, the threatened or endangered Species that
may be within the projects area, if any.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
CBK/SAA
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; RNA, P.O. Box 35624, Charlotte, NC. 28235
401 OversighVExpress Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn://h2o.enr.state.ne,us!ncwctlands
04-1530 stormwater on hold Mallard Creek High School 4-6-05
N no Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
0F WATE9 Michael F. Easley, Governor
p
?
0 G
William G. Ross Jr., Secretary
?
North Carolina Department of Environment and Natural Resources
QW(
O Alan W. Klimek, P.E. Director
Division of Water Quality
April 7, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORIIIATION-Stormwater Management Plan
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed High School. The following additional information is needed to enable us continue with the
reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• The ponds are to meet the requirements of DENR's BMP manual, and 85% TSS removal for all
runoffs.
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
Clarification of the project actual area from the original 85 acres that was proposed.
• A summary of the present project states, status, activities, current impacts area amounts, and streams
impacts if any vs original stage at the initial application request.
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 4-7-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn'//h2o.enrstate.nc.usincwcttonds
N r Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
OF W ATFR Michael F. Easley, Governor
Q
?

/J ?,, I ?? r North Carolina Dep William G. Ross Jr., Secretary
artment of Environment and Natural Resources
p Alan W. Klimek, P.E. Director
Division of Water Quality
May 31, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR l1IORE INFORMATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP# 1, surface area, temporary pool, orifice diameter, and the draw down did not meet requirements.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 5-31-05
401 Oversighl/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone]/ Internet: httn://h2o.enr.state.nc.us/ncwetlands
No iihCarolina
Aakrrally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
?OF W ATF9Q Michael F. Easley, Governor
?O G William G. Ross Jr., Secretary
T? North Carolina Department of Environment and Natural Resources
D Q
W
-? Alan W. Klimck, P.E. Director
Division of Water Quality
June 2, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED INIAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORI`IATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP# 1, surface area, temporary pool, orifice diameter, and the draw down did not meet requirements.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-2-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn://h2o.enr.state.ne,us/newetlands
None Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper

W ATFRQ Michael F. Easley, Governor
William G. Ross Jr., Secretary
DW7E North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 10, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Storm water Management Plan
Dear Mr. Higgins:
On June 6, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan dated
June 6, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The following
additional information is needed to enable us continue with the reviews of your application:
• New 401 Detention wetland worksheets.
• Pond It 1, surface area, temporary pool, orifice, and the draw down did not meet design requirements.
• Accounts for the entire total project area drainage basins, and flow rates.
• A summary of the present project states, status, impacts area amounts, and mitigation status.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Storm water Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/saa
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-10-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn:/ih2o.enr.state.ne.usinewetlands
None Carolina
Ntima!!y
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/1 0% Post Consumer Paper

Project Name: Mallard Creek II.Sch
Project No. DNQ 04-1530
Pond No.
SUBMITTED DESIGN 1 REQUIRED DESIGN:
5/24/2005
elevations .3.3average depth status
Bottom of Basin (ft) 720
Permanent Pool (ft) 726 6 ft. depth ok
Temporary Pool (ft) 728.86 2.86 ft. depth ok

areas
Permanent Pool SA (sq ft)
22264
21888 sq. ft.
ok
Drainage Area (ac) 46.1 28661 based on avg depth check surfac
Impervious Area (ac) 20.5 44.5 % -

volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 71545 75341 cu. ft. check tempo
Forebay (cu ft) 15692 21.3 % ok

other parameters
SA/DA 1.09 1.09 -
Orifice Diameter (in) 4.25 0.57 cfs drawdown -
Design Rainfall (in) 1 1.5 day drawdown check drawn,
Linear Interpolation of Correct SAIDA * * *
6 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 40 1.34 1.258592346 1.08
Project Impervious 44.5 1.09 1.43, 1.24
Next Highest 50 1.73 1.636068092 1.43
3 ft 4
a?? me?cf C?.wfw'?
S I?`? l

Project Name: Mallard Creek H.Sch
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN: 1
5/24/2005
elevations
Bottom of Basin (ft) 720
Permanent Pool (ft) 726
Temporary Pool (ft) 728.86
REQUIRED DESIGN.-
_ _3.3' average depth
6 ft. depth
2.86 ft. depth
areas
Permanent Pool SA (sq ft) 22264 30408 sq. ft.
Drainage Area (ac) 46.1 28661; based on avg depth
Impervious Area (ac) 20.5 44.5 %
volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 71545 75341 cu. ft.
Forebay (cu ft) 15692 21.3 %
other parameters
SA/DA 1.09 1.51
Orifice Diameter (in) 4.25 0.57 cfs drawdown
Design Rainfall (in) 1 1.5 day drawdown
Linear Interpolation of Correct SAIDA***
6 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 40 1.34 1.258592346
Project Impervious 44.5 1.51 1.431
Next Highest 50 1.73 '1-.6360-6--8-0-9--2--
3 ft
status
ok
ok
check surfac
check surfac
check tempo
ok
check draws
1.08
1.24
1.43
4
Z/
6yc
?S ?T/'

Project Name: Mallard Creek H.Sch
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
5/24/2005
elevations 3.3 'average depth status
Bottom of Basin (ft) 720
Permanent Pool (ft) 726 6 ft. depth ok
Temporary Pool (ft) 730 4 ft. depth ok
areas
Permanent Pool SA (sq ft) 22264 21888 sq. ft. ok
Drainage Area (ac) 46.1 28661= based on avg depth check surfac
Impervious Area (ac) 20.5 44.5 % -
volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 76000 75341 cu. ft. ok
Forebay (cu ft) 15692 21.3 % ok
other parameters
SA/DA 1.09 1.09 -
Orifice Diameter (in) 3 0.33 cfs drawdown -
Design Rainfall (in) 1 2.6 day drawdown ok
Linear Interpolation of Correct SAIDA * * *
6 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 40 1.34 1.258592346 1.08
Project Impervious 44.5 1.09 JAY 1.24
Next Highest 50 1.73 1.636068092 1.43
3 ft 4
Szwm??l??ec)' C"D tLId
Sea-
??ay

TURNBULL SIGMON DESIGN
loos Morehead Square Drive
Suite 530
Charlotte, North Carolina 28203
Phone: [phone]
Fax: 704.522.o882
Mallard Creek High School
Project No: 03055
CALCULATIONS FOR:
Water Quality Basin
4, 04
tetai 4? r ,
DATE: December 6, 2004, REV.
` Vl Nnd•1' ly??D ^ h'
e '
MIX
Mallard Creek Hi School Turnbull Sigmon Design
,
JOB NO.: 030.55 BY: STC iooi Morehead Square Dr., Suite 530 v
DATE: 1216104 P.M.: ECM Charlotte, North Carolina 28203
REVISED: WATER UALITYBAS N DESIGN
WATER Q UALITY REQ UIREMENTS FOR BASIN #1
To meet the Water Quality requirements, the procedure outlined in the "Stormwater Best
Management Practices" published by NCDENR will be used. This guide gives the
required pond surface area and storage volume to meet an 85% pollutant removal
efficiency. Also, the pond must detain the first 1" of rainfall and release this volume
over a period of 2 to 5 days. Calculations for these requirements are as follows:
Surface area requirements
Drainage area to pond (Da)= 46.05 Ac
Post-development impervious percentage = 42%
Average pool depth = 6 ft
Designed permanent pool elevation = 726
From table 1.1 in the BMP guidelines the required Surface Area to Drainage Area
Ratio (SA/DA) for a permanent pool depth of 4 feet = . 1.09
Required surface area = SA/DA / 100 x Drainage area=
Surface area of pond as designed at permanent pool elevation =
1"rain all requirements
Using the runoff volume calculations in the "Simple Method"
Rv = 0.05 +.009 (1)
Rv= 0.428 in/in
Volume = (Design rainfall) (Rv) (Drainage Area)
Volume = 1" rainfall x Rv in/in x 1/12 in/ft x Da =
0.50 Ac
0.51 Ac
1.64 ac-ft
or 71545 ft^3
% PERMANENT POOL DEPTH '
Impervious 3 4 5 6 7 8 9
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
12 0.67 0.55 0.48 0.4 0.35 0.32 0.3
20 0.97 0.79 0.7 0.59 0.51 0.46 0.44
25 1.6 0.94 0.84 0.72 0.61 0.55 0.53
30 1.34 1.08 0.97 0.85 0.7 0.64 0.62
38 1.65 1.36 1.19 0.99 0.86 0.78 0.74
40 1.73 1.43 1.25 1.03 0.9 0.82 0.77
45 1.87 1.58 1.38 1.18 1 0.91 0.85
50 2 1.73 1.5 1.33 1.09 1 0.92
55 2.2 1.88 1.58 1.42 1.19 1.09 1.01
60 2.39 2.03 1.66 1.51 1.29 1.17 1.1
65 2.57 2.15 1.81 1.65 1.39 1.26 1.2
70 2.75 2.27 1.96 1.79 1.48 1.35 1.29
72 2.82 2.32 2.02 1.85 1.52 1.39 1.33
75 3.04 2.39 2.11 1.93 1.58 1.44 1.39
80 3.25 2.51 2.26 2.07 1.67 1.53 1.48
85 3.47 2.63 2.41 2.21 1.77 1.62 1.58
90 3.68 2.75 2.56 2.35 1.86 1.71 1.67
This volume must be released over a period of 2-5 days
Mallard Creek Hi School Turnbull Sigmon Design
JOB NO.: 03055 BY: STC iooi Morehead Square Dr., Suite 580 Q
DATE: 1216104 P.M.: EC111 Charlotte, North Carolina 28203
REVISED: WATER UALITYBASIN DESIGN -
WATER QUALITY BASIN #1 MODEL
Water Quality Basin Storage Volumes
Elevation
(ms!) Area
(sf) Area
(ac) Volume
(cu-ft) Volume
(ac-ft)
720 5703 0.1309 0 0.0000
721 i 9152 ! 0.2101 I 7352 0.1688
722 10506 i 0.2412 17164 0.3940
723 11937 i 0.2740 I 28367 I 0.6512
724 13446 1 0.3087 41038 0.9421
725 j 15028 I 0.3450 I 55253 1.2684
726 1 22264 1 0.5111 73763 1.6934
727 24165 1 0.5548 96947 2.2256
728 I 26134 1 0.6000 1 122065 2.8022
729 1 28180 ' 0.6469 ! 149189 i 3.4249
orebay Storage Volumes (29.6°6)
Elevation
(ms/) I Area
(so Area
? (ac) Volume
(cu-ft) Volume
(ac-ft)
721 2711 0.0622 1 0 I 0.0000
722 i 3288 0.0755 2992 i 0.0687
723 3903 0.0896 6579 1 0.1510
724 4556 0.1046 10800 i 0.2479
725 5245 0.1204 15692 1 0.3602

Storage Volumes
Elevation I
(mst) i Area
(ac) i Volume
(ac-ft)
726 0.5111 0.00
727 7 0.5548 { 0.53
728 0.6000 1.11
729 0.6469 ; 1.73

I

I I
Elevation Interpolation
Elev Storage Area Stora e Area
728
Elev
729 1.1089
1.6425
1.7315 26134
27887
28180
Stora a elevation = 2.86 ft. above permanent pool elev.
Stora a elevation = 728.86
Determination of Orifice size hor 2-S daft draivdotun
a= 2A x sgrt(h) 'Falling head equation
Cts rt2 )
a= Area of orifice a sqft
t= Time to drawdown 172800 sec 2 day min.
A= Average pond surface area 25076 sf
g= Gravity constant 32.2 ft/s^2
h= Change in head 2.86 ft
C= Orifice constant 0.6
Maximum orifice area = 0.101880766 sqft
Pdaximum orifice size = 4.32 inches 2 day drawdown
Determination of High Water Elevation
IF7 31h A 3/2
Q= 10 yr. storm runoff 194.00 cfs
1= weir length 24.00 ft
h= elevation over weir h ft
h= (Q/3.33 x I)^ Z3
h= 1.80619
Elevation 730.66
Determination ofEmercLey Spillwag Size 730.75
Q=3.331h^3/2
Q= 100 yr. storm runoff 275.00 cfs
1= weir length 1 ft
h= elevation over weir 1.25 ft
1= 01(3.33 x I"3/2)
Length 59.09
Mallard Creels High School Turnbull Sigmon Design
JOB NO.: 030.5,5 BY: STC iooi Morehead Square Dr., Suite 530
DATE: 1216104 P.M.: ECDI Charlotte, North Carolina 28203
REVD: FLOATATION CALCULATIONS
Calculations Given Data Standard Footing Assuni tions
Buoyant Weight of Concrete 87.6 Ibs/f A3 1. Footing base to be 1 ft. wider than structure
Weight of Water 62.4 Ibs/ft^3 on all sides.
Safety Factor S.F. 1.25 2. Footing depth to be a minimum of 8 inches in depth.
Equations use :
Outlet Structure Weight, W(s) = 4(w + t) x t x h x W(bc)
where, w = outlet box inside dimension, ft.
Displaced Water Weight, W(w) = 4 x (w + 2t) x W(w) x h t = structure wall thickness, ft.
h = height of structure, ft.
Required Base Weight, W(b) = (W(w) x S.F.) - W(s) W(bc)= buoyant weight of concrete, Ibs/ft^3
W(w) = weight of water, Ibs/lt^3
Required Footing Volume, V(0 = W(b)/W(bc) S.F.= safety factor
Outlet Structure #1
Structure Dimensions Object Mi hts
Height of structure, h = 9 ft. Outlet Structure Weight, W(s) = 10249 Ibs
Structure wall thickness, t = 6 in. Displaced Water Weight, W(w) = 15
724.8 Ibs
Outlet box inside dimension, w = - 6 ft. Re 'd Base Weight, W(b = _
9407 Ibs
Footin Size
Required Footing Volume, V(t) = 107 cf Standard Footing Length, L = 9.00 ft.
Provided Footing Volume, V(f) =
Footing Check
oka 162 cf
y Standard Footing Width, W =
Minimum Footing Depth, D = 9.00 ft.
1.68 it.
Footing Size to be used: Length =
Width =
De th = 9.00 ft.
9.00 ft. Outlet Structure #1
2.00 ft.
Mallard Cree k Hi School Turnbull Sigmon Design ?I
JOB NO.: 03055 BY: sT1C iooi Morehead Square Dr., Suite 530 II
DATE: 12/6/04 P.M.: E.31 Charlotte, North Carolina 28203
REVISED: STORM DRAINAGE D ESIGN DATA -
LOCATION
-?- -

FROM TO DRAIN
AREA

(acre) RUNOFF

C i - 1Q inlet Q pipe
(cfs) (cfs) PIPE
-? ROUNDED

n SLOPE LENGTH; SIZE -SIZE
(ft/ft) (ft) i (inches) 1 (inches) TRAVEL TIME
FULL DELTA TOTAL

VEL. "T" T'
(fps) (min) (min) INVERT ELEV.
_-r
i
INV INV INV
OUT IN OUT PIPE DEPTH
(FROM) (FROM)

RIM COVER
ELEVATION I ( DEPTH
OS#127 HW#128 46.05 0.60 1 7.03 1 194.2 0.0131 0.010 1 43 53.7 54 12.2 0.06 1 0.06 719.80 719.37

I i IE
__.--_ f
l - -----

? I I I I I i
i

I I I I I I I I II
`

I
?

I - r- -I -r- -t-- I I - - -
Re: Mallard Creek High School (IP)
D4 -1530
Subject: Re: Mallard Creek High School (IP)
From: Alan Johnson <[e-mail]>
Date: Mon, 31 Jan 2005 16:27:29 -0500
To: Cyndi Karoly <[e-mail]>
sorry. Not recommending a hold. The revised plan was submitted and showed
#k3 was avoided (originally was going to be impacted) and a couple of other
changes. . I took a look and just gave my comments:
A little more buffer along stream 43 and pull the soccer field down (if
possible) from wetland I.
Since it had been on my desk a while, I didn't know if my "comments" were
too late.
I guess I should go and put this on filemaker.
Cyndi Karoly wrote:
I"m confused - are you now recommending another hold or issuance. Your
filemaker report is toggled issue, but this message looks like hold
issues. Please advise.
Alan Johnson wrote:
404-1530
Got lost on my desk. I recieved a copy of the response regarding
changes to the original plan.
Comment I have is:
that on stream 43 (originally was to be impacted), it is now not
impacted but has only a 10 ft buffer. Can fill/grading be pulled back a
bit more? Total of 25 ft.?
They still show wetland "I" (isolated) as being impacted. Can the
soccer field be slid down to leave this unimpacted.
Alan Johnson - Alan.JohnsonCncmail.net
%TITLE%
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
Alan Johnson - Alan.Johnsoncncmail.net
%TITLE%
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
1 of 2 1/31/2005 4:36 PM
Re: Mallard Creek High School (IP)
Alan Johnson <Alan.Johnson ra ncmail.net>
%TITLE%
Div. of Water Quality
NC DENR - Mooresville
2 of 2 1/31/2005 4:36 PM
MEMORANDUM
TO: John Dorney Regional Contact:
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Mallard Creels High School
Project Number 04 1530
Recvd From APP
Received Date 9/13/04
Project Type institutional
Recvd By Region
Alan Johnson
RPx C23leason
County Alecklcnburg
County2
Region Mooresville
Certificates Stream
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req.
F IP water & F7 ON F-13-17-5-5 r C F_30,711. 1.23 ,490.00
?? O Y O N F__ F_ F_F__ F_ F_
Mitigation Wetland
MitigationType Type Acres Feet
Is Wetland Rating Sheet Attached? 0 Y 0 N Did you request more info? 0 Y 0 N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y 0 N
Is Mitigation required? Q Y O N Recommendation: Q Issue 0 Issue/Coed 0 Deny
Provided by Region: Latitude (ddmmss) 352115 Longitude (ddmmss) 804600
Comments:
cc: Regional Office Page Number I1
Central Office
Facility Name Mallard Creek High School
Project Number 04 1530
Date: 10/21/2004
Comments (continued from page 1):
Stream 2: Designated perennial in the application. No new impacts are proposed for this stream. However. an
existing culvert will be relocated to accomodate access to the school. The old culvert will be removed and the
stream restored to it original state.
Stream 3: Was designated intermittent in the application. Crayfish were observed approximately 30 ft_
downstream of the existing road crossing. A salamander was also observed. Mitigation should be required for
that segment of stream channel below the road crossing (approximately 300 If). This channel is highly 'mpacted
from stormwater discharges into the channel at the upper end. Large pools of water were observed in most of the
channel. Numerous crayfish burrows were observed in the riparian area. The existing road crossing will be
relocated upstream. A stormwater retention pond is to be constructed in the area vacated by the road crossing.
Total impact, approximately 600 If.
Stream 4: Located approximately 50 feet to the west of stream #3. Appears to be a natural stormwater channel.
Aproximately 15 -24 inches wide and 12 to 24 inches deep. No water was observed in the channel.
Approximately 100 If impacted.
Wetland A .29 acre): Apparently a dug channel at the upper end of the pond. One may describe it as a
backwater. It also includes an emergent wetland at the upper end of the pond (cat tails and willows, 0.29 ac.
impact).
Wetland B (0.04 acre): Located below the pond. Probably a result of overflow from the spillway of the pond and a
shallow water table (0.04 ac. impact).
Wetland G (3.87 acre): Bingham Swamp. This is considered an isolated wetland. However, because no imna_rts
are proposed for this area, the site was not reviewed. The "swamp" extends beyond the property boundary and is
believed to be approximately 10 total a .r .s in si This ar .a is proposed to be preserved for mitigation purposes.
Wetland D. F. F_ G- Not proposed for impart, thus not reviewed.
Wetland J (0.10 acre): The "tin" of the wetland is to be impacted (0.005 ac. impact).
Wetland 1 (0.26 acre): Isolated. Impact is for the construction of one of three proposed soccer fields. It was
given a score of 26 points out of 100 on the wetland rating form by the applicant. 0.26 ac. impact. The soccer
field proposed at this location is an addition to the park as are the other two soccer fields. Recommend that this
wetland be left intact.
Wetland K (0.04 acre): Located along the upper reach of stream #3. There is a high water table as evidenced by
the crayfish burrows. Also influenced from the stormwater discharg . ie ust upstream of the area.
None of the wetlands appeared to be high quality, The highest score given by the applicant on the wetland rating
sheet was 42 points for wetland K. The remainder scored between 20 and 31 points.
County Mecklenburg
Regional Contact: Alan Johnson
cc: Regional Office
Central Office Page Number 2
Mallard Creek High School (IP)
Subject: Mallard Creek High School (IP)
From: Alan Johnson <[e-mail]>
Date: Fri, 28 Jan 2005 16:40:03 -0500
To: [e-mail]
404-1530
Got lost on my desk. I recieved a copy of the response regarding
changes to the original plan.
Comment I have is:
that on stream 43 (originally was to be impacted), it is now not
impacted but has only a 10 ft buffer. Can fill/grading be pulled back a
bit more? Total of 25 ft.?
They still show wetland "I" (isolated) as being impacted. Can the
soccer field be slid down to leave this unimpacted.
Alan Johnson - Alan.Johnsonancmail.net
%TITLE%
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
Alan. Johnson <Alan.Johnson rc.ncmail.net>
%TITLE%
Div. of Water Quality
NC DENR - Mooresville
1 of 1 1/31/2005 4:08 PM
Q Chadotte-Mecklenbbukrgg?
5wORN
MUM,
Services r
Michael A. Iagnocco, PWS
Ralph Whitehead Associates, Inc.
1000 W. Morehead Street, Suite 200
Charlotte, NC 28208
Subject: Project: Mallard Creek High School
HUC#: 03040105
January 31, 200 0 @ [ROW
FFR 0 3 2005
DENR - WATER QUhLWY'
V.=.M10S AND STOaAVATER BRANCH
The purpose of this letter is to notify you that the City of Charlotte Storm Water Services (CSWS) is willing to accept payment
for stream impacts associated with the subject project. Please note that the decision by CSWS to accept the mitigation
requirements of this project does not assure that this payrnent will be approved by the U.S. Army Corps of Engineers or the North
Carolina Division of Water Quality 401/Wetlands Unit. It is the responsibility of the applicant to contact these agencies to
determine if payment to CSWS for impacts associated with this project is appropriate.
This acceptance is valid for three months from the date of this letter. The following documents must be submitted to CSWS
within this time frame for this acceptance to remain valid:
1. 404 Permit Verification
2. 401 Water Quality Certification
3.. Executed Memorandum of Understanding between the City of Charlotte and Mecklenburg County detailing the
use of and payment for the credits described in the table below.
Based on the information supplied by your office, the stream and wetland credits that are necessary to satisfy the compensatory
mitigation requirements for this project are detailed in the table below. The total mitigation credits available for this project are
also indicated in this table.
Stream
linear feet Wetlands
acres
Credits Requested for This Project 200 N/A
Credits Available for This Project 200 N/A
The stream and wetland mitigation will be provided as specified in the Section 404 Permit or corresponding 401 Water Quality
Certification for impacts associated with the subject project in Hydrologic Unit 03040105 of the Rocky River Basin. The
mitigation will be performed in accordance with the Agreement to Establish the City of Charlotte Umbrella Stream and Wetland
Mitigation Bank in Mecklenburg County, North Carolina, dated June, 16, 2004. Please be advised that the impacts for this
project occur in a different hydrologic Unit than the mitigation project providing credit. The use of credits outside the
hydrologic Unit, but within the Umbrella Bank's Geographical Service Area, is allowable per Provision 18 of the
Mitigation Banking Instrument.
If you have any questions or need additional information, please contact me at [phone] or ikarl o ci.charlotte.nc.us.
Sincerely,
Charlotte Storm Water Services
cc: Amanda Jones, USACE
Cyndi Karoly, NCDWQ
File
Jarrod ?JKa?rl\?
Wetland Specialist
Charlotte Storm Water Services-600 East Fourth Street Charlotte, North Carolina 28209
Phone: [phone] FAX: [phone]
To report drainage problems. - - - - N
Printed on recycled paper
TURNBULL G SIGDION DESIGN
January 11, 2005
Mr. Mike Higgins
Construction Management Services
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
03055 - Mallard Creek High School
Storm Water Quality
Mr. Higgins:
The Mallard Creek High School project shall be designed to correspond with the existing drainage
characteristics for the site. Currently, the entire site drains to Stoney Creek. The proposed grading of the
high school and park site will be separated into two main drainage basins, drainage basin #1 and drainage
basin #2, respectively. It should be noted that Stoney Creek is a regulated floodway for a portion of our site;
therefore, storm water detention requirements will be waived for the project from local governing agencies by
providing permanent storm water detention easements to the regulated portion. Due to the high amount of
impervious areas associated with the development of a new high school, a water quality basin will be
provided for drainage basin #1. This water quality device will be designed for the removal of 85% of the total
suspended solids and convey the storm water outfall via level spreader to Stoney Creek. An existing 35'
SWIM buffer currently exists along Stoney Creek and will be adhered to per Mecklenburg County
Ordinances. This SWIM buffer will further assist water quality by providing an additional level of treatment as
a filter strip between the level spreader and Stoney Creek.
Drainage basin #2 is associated with the athletic fields across Bingham Drive. The total impervious area for
this basin is 11 % of the drainage area. As a result, no water quality treatment basin will be provided.
However, the existing 35' SWIM buffer will provide some level of treatment as a filter strip for the basin.
In summation, the overall storm water quality management plan for the proposed development will
incorporate a water quality basin for the high amount of impervious area associated with the school site,
designed for 85% TSS removal, level spreader and 35' SWIM buffers in an effort to remove a majority of the
potential toxins prior to entering the waters of Stoney Creek.
Please call should you have any questions or need to discuss the aforementioned information.
J,,f>
Sean T. Calloway, PE
Principal
cc: Craig Norsted, AIA - LS3P
Brian Sigmon, RLA - TSD
E. Carr Mumford, RLA - TSD
Mike lagnocco - RWA
Land 1 ool Morehead Square Drive
Development Suite 530
Design Services Charlotte, NC 28203
Phone:7o4-529-65oo
Fax: 70¢-522-o882
turnbullsigmon.com
?QF W ATFRp Michael F. Easley, Governor
William G. Ross Jr., Secretary
Cq North Carolina Department of Environment and Natural Resources
j r
p ^ DW ?`- Alan W. Klimek, P.E. Director
Division of Water Quality
February 8, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
Subject Property: Mallard Creek High School
REQUEST FOR MORE INFORMATION
Dear Mr. Higgins:
On October 12, 2004, the Division of Water Quality (DWQ) received your application dated
October 5, 2004 to impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres
of ponds and 1,153 feet of streams to construct the proposed Mallard Creek High School.
Additional information was received on November 29, 2004 and December 28, 2004. The DWQ
has determined that your application is incomplete and/or provided inaccurate information as
discussed below. The DWQ will require additional information in order to process your
application to impact protected wetlands and/or streams on the subject property. Therefore,
unless we receive the additional information requested below, we will have to move toward
denial of your application as required by 15A NCAC 2H.0506 and will place this project on
hold as incomplete until we receive this additional information. Please provide the following
information so that we may continue to review your project:
1. Stormwater Management: Your original proposal indicated the use of wet detention
ponds and level spreaders to treat the runoff from this site. However, your letter dated
November 23, 2004 indicated a proposal to eliminate a stormwater basin from Drainage
Area No. 2. Please be reminded that the stormwater management facilities must be
designed to treat the ncnoff from the entire project, unless otherwise explicitly approved
by the Division of Water Quality. Final DWQ written approval of your stormwater plan
will be needed before stream or wetland impact occurs. Stormwater information can be
found at: http://h2o.enr.state.nc.us/ncwetlands/mitresto.html.
Please respond within three weeks of the date of this letter by sending this information to me in
writing and Alan Johnson of the DWQ Mooresville Regional Office. If we do not hear from you
within three weeks, we will assume that-you no longer want to pursue this project and we will
consider the project as withdrawn.
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands
None bCarolina
Natura!!il
An Equal Opportunity/Affirmative Action Employer - 500% Recycled/10% Post Consumer Paper
Mallard Creek HS
Page 2 of 2
February 8, 2005
This letter only addresses the information received regarding stormwater management. If you
have other outstanding issues in regard to your 401 Water Quality Certification application, you
must address them. This correspondence does not authorize any impacts to wetlands, waters or
protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please contact Cynthia Van Der Wiele, Ph.D. at
[e-mail] if you have any questions regarding this matter.
Sincerely,
Cyndi B. Karoly, Manager
DWQ, Wetlands / 401 Unit
CBK/cvdw
cc: Alan Johnson, DWQ Mooresville Regional Office
Doug Miller, DLR Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Mike Iagnocco, Ralph Whitehead Associates, Inc., 1000 W. Morehead Street, Suite 200,
Charlotte, NC 28208
Filename: 041530MallardCreekHS(Mecldenburg)ONHOLD3
?OF W ATF9Q Michael F. Easley, Governor
?O ^ G William G. Ross Jr., Secretary
Cl) tom-- North Carolina Department of Environment and Natural Resources
-? Alan W. Klimek, P.E. Director
Division of Water Quality
November 3, 2004
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
Subject Property: Mallard Creek High School project
REQUEST FOR MORE INFORMATION
Dear Mr. Higgins:
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5,
2004 to impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1,153
feet of streams to construct the proposed Mallard Creek High School. The DWQ has determined that your
application was incomplete and/or provided inaccurate information as discussed below. The DWQ will
require additional information in order to process your application, to impact protected wetlands and/or
streams on the subject property. Therefore, unless we receive the additional information requested below,
we will have to move toward denial of your application as required by 15A NCAC 2H .0506 and will
place this project on hold as incomplete until we receive this additional information. Please provide the
following information so that we may continue to review your project.
Additional Information Requested:
1. Compensatory stream mitigation: As DWQ staff have discussed with your consultant, DWQ will
require stream mitigation at a 1:1 ratio for the 300 feet of impact to stream # 3 below the proposed
road crossing. Please submit a plan for this mitigation.
2. Stormwater ponds: You have proposed to use wet detention ponds and level spreaders to treat the
runoff from this site which is acceptable to DWQ. Please be aware that final DWQ written
approval of your stormwater plan will be needed before stream or wetland impact occurs.
3. From recent discussions with Mr. Doug Miller of the DLR Mooresville Regional Office, it appears
that there is not sufficient room in the site plan to install erosion and sedimentation control
measures outside the SWIM buffer. Please address this issue in a revised submittal.
Please respond within three weeks of the date of this letter by sending this information to me in writing
and Alan Johnson of the DWQ Mooresville Regional Office. If we do not hear from you within three
weeks, we will assume that you no longer want to pursue this project and we will consider the project as
withdrawn.
This letter only addresses the application review and does not authorize any impacts to wetlands, waters
or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call Mr. John Dorney at 919-733-1786 if you have any
questions regarding or would like to set up a meeting to discuss this matter.
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands
N ne Carolina
Xturally
An Equal Opportunity/Affirmative Action Employer-50% Recycled/10% Post Consumer Paper
Applicant:
Page 2 of 2
Date:
Sincerely,
JRD1jrd
rQ,W7e Dom y,
/14 0 1 U it
cc: Alan Johnson, DWQ Mooresville Regional Office
Doug Miller, DLR Mooresville Regional Office
Amanda Jones, USACE Asheville Regulatory Field Office
File Copy
Central Files
Mike Iagnocco, Ralph Whitehead Associates, Inc., 1000 W. Morehead Street, Suite 200,
Charlotte, NC 28208
Filename: 041530MallardCreekHS(Mecklenburg)ONHOLD
Mallard Creek - DWQ No. 04-1530, Mecklenburg
Subject: Mallard Creek - DWQ No. 04-1530, Mecklenburg
From: "Michael Iagnocco" <[e-mail]>
Date: Tue, 1 Mar 2005 13:54:59 -0500
To: "Cyndi Karoly (E-mail)" <[e-mail]>
Hey Cyndi - hope you're doing well - and feeling better. In light of our respective
schedules and inherent difficulties in speaking to each other in person, I've
resorted to email. I hope you don't mind.
We could really use your help. To get you up to speed, let me briefly recap the
project for you.
September 9, 2004 - date of our original IP submittal to the Corps/DWQ. Project
involved a new high school and proposed improvements (ball fields, parking lot
expansion, roadway realignment) to the adjoining existing park (built early 1901s).
As a result we had proposed a stormwater basin on the school side of the site
(Drainage Area 1) and the park side (Drainage Area 2).
November 23, 2004 - We submit information in response to DWQ's request dated November
3, 2004. In this submittal we describe changes to the site plan, particularly the
park elements. These changes were largely a result of the school's budget
constraints. Bottom line - the originally proposed road realignment and additional
parking on the park side were eliminated. We no longer proposed any impervious
elements on the park side - just the addition of soccer fields. The proposed
impervious coverage in the park side drainage area would no longer change as a result
of our project and would remained at <11%. After a conversation with John Dorney, in
which I described the changes in the site plan, impervious coverage, and our desire
to eliminate the park side stormwater basin (to which John replied - 'makes sense')
we dropped the basin from our plan. This was described in our November submittal to
you.
December 14, 2004 - DWQ requested additional information. The only issue raised at
this juncture was for us to demonstrate that we were no longer impacting over 150 if
of perennial stream channel and that mitigation would not be required.
December 21, 2004 - We resubmit to the Corps, responding to the Corps and citizen's
comments, providing updated site plan/permit drawings demonstrating less than 150 if
of impact to perennial streams. At your suggestion we subsequently forwarded a copy
of this information to Alan Johnson 9 MRO.
January 11, 2005 - Our conversation during which you informed me that the 401 was in
your issuance pile.
February 8, 2005 - DWQ requests additional information, specifically related to the
storm ware management plan and our removal of the basin on the park side.
(OK, so maybe it wasn't that brief) Last week you suggested to me via voice mail that
we needed our engineer to get Cynthia V. the information she needed, and you were
kind enough to give us a heads up as to Cynthia's upcoming schedule/unavailability. I
am extremely disappointed to report that despite concerted efforts on the part of our
engineer (Sean Calloway with Turnbull Sigmon Design) to contact Cynthia last week,
that she failed to return Sean's repeated phone calls. Cynthia's unavailability for
the next two weeks has really put us in a bind. We were hoping to convince her that a
stormwater basin on the park side is not needed - that still seems to be a logical
conclusion in this matter to me. Since John was the point person on this before you
took command, he may be able to offer some input in this regard.
Please, please respond to me with a course of action. Please also consider the
following - the school, as proposed, is currently 3 million dollars over budget.
There is a strong possibility that the school will wind up being built without a
baseball field and other important campus appurtenances. Requiring the school to
spend money to design and construct a stormwater basin for a drainage area with <11%
impervious coverage, will directly affect what is ultimately built on the school
site.
1 of 2 3/1/2005 2:22 PM
Mallard Creek - DWQ No. 04-1530, Mecklenburg
Thanks for your attention in this matter.
Michael A. Iagnocco, P.W.S.
Project Manager/Senior Scientist
michael.iagnocccgrwhitehead.com
Ralph Whitehead Associates, Inc
1000 W. Morehead, Suite 200
Charlotte, NC 28208
www.rwhitehead.com
ph: 704/372-1885
fx: 704/372-3393
cell: 704/281-7918

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2 of 2 3/1/2005 2:22 PM
REPLY TO
ATTENTION OF:
Regulatory Division
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
151 PATTON AVENUE
ROOM 208
ASHEVILLE, NORTH CAROLINA 28801-5006
October 5, 2004
Action ID No. 200430232
Ms. Cyndi Karoly
North Carolina Department of Environment
and Natural Resources
Division of Water Quality, Wetland/401 Unit
1650 Mail Service Center
Raleigh, North Carolina 27699-1650
Dear Ms. Karoly:
D
OCT 1 2 2004
DENR - 4-WE.R QUALITY
ViETW-us P."tiD ST0 %!' i'kTER BRANCH
Enclosed is the application submitted by Charlotte-Mecklenburg Schools, for Department of
the Army authorization and a State Water Quality Certification to authorize the proposed placement
of fill within 1,153 linear feet of jurisdictional stream channels, 0.8 acres of an open water pond,
0.375 acres of jurisdictional wetlands, and 0.26 acres of non jurisdictional, isolated wetlands, which
are adjacent to and include unnamed tributaries to Stony Creek, in order to construct the proposed
Mallard Creek High School and expand an existing soccer facility, located on the east and west side
of Bingham Road, in Charlotte, Mecklenburg County, North Carolina.
We are considering authorizing the proposed activity pursuant to Section 404 of the Clean
Water Act, and we have determined that a water quality certification is required under the
provisions of Section 401 of the same law. A Department of the Army permit will not be granted
until the certification has been obtained or waived.
In accordance with our administrative regulations, in most cases, 60 days after receipt of a
request for certification is a reasonable time for State action. Therefore, if you have not acted on the
request, or asked for an extension of time, by Friday, December 3, 2004, the District Engineer will
deem that waiver has occurred.
Questions or comments may be addressed to Ms. Amanda Jones, Asheville Field Office,
Regulatory Division, telephone [phone] extension 231.
Sincere y,
)406-4
Scott McLendon
Chief, Asheville Regulatory Field Office
Enclosure

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DWQ# Date Who Reviewed:
Plan Detail Incomplete
? Please provide a location map for the project.
? Please show all stream impacts including all fill slopes, dissipaters, and bank stabilization on the site plan.
? Please show all wetland impacts including fill slopes.on the site plan.
? Please indicate all buffer impacts on the site plan.
? Please indicate proposed lot layout as overlays on the site plan.
? Please indicate the location of the protected buffers as overlays on the site plan.
? Please locate all isolated or non-isolated wetlands, streams and other waters of the State as overlays on the site plan.
? Please provide cross section details showing the provisions for aquatic life passage. -- -- -- - --- - - -
? Please locate any planned sewer lines on the site plan.
? Please provide the location of any proposed stormwater management practices as required by GC
? Please provide detail for the stormwater management practices as required by GC
? Please specify the percent of project imperviousness area based on the estimated built-out conditions.
? Please indicate all stormwater outfalls on the site plan.
? Please indicate the diffuse flow provision measures on the site plan. ` .
? Please indicate whether or not the proposed impacts already been conducted.
Avoidance and/or Minimization Not Provided
? The labeled as on the plans does not appear to be necessary. Please eliminate the or provide additional
information as to why it is necessary for this project.
? This Office believes that the labeled on the plans as can be moved or reconfigured to avoid the impacts to the
. Please revise the plans to avoid the impacts.
? This Office believes that the labeled on the plans as can be moved or reconfigured to minimize the impacts to the
Please revise the plans to minimize the impacts.
? The stormwater discharges at the location on the plans labeled will not provide diffuse flow through the buffer because
Please revise the plans and provide calculations to show that diffuse flow will be achieved through the entire buffer. If it
is not possible to achieve diffuse flow through the entire buffer then it may be necessary to provide stormwater management
practices that remove nutrients before the stormwater can be discharged through the buffer.
Other
? The application fee was insufficient because over 150 feet of stream and/or over 1 acre of wetland impacts were requested. Please
provide $ This additional fee must be received before your application can be reviewed.
? Please complete Section(s) on the application.
? Please provide a signed copy of the application.
? Please provide copies of the application, copies of the site plans and other supporting information.
Mitigation
? of compensatory mitigation is required for this project. -Please provide a compensatory mitigation plan. The
plan must conform to the requirements in 15 A NCAC 2H.0500 and must be appropriate to the type of impacts proposed.
? Please indicate which 404 Permit the USACE would use to authorize this project.
Mallard creek High
Subject: Mallard creek High
From: Alan Johnson <[e-mail]>
Date: Fri, 22 Oct 2004 12:56:43 -0400
To: [e-mail]
I imagine these are the two questions ( I am in for the afternoon)
Stream #1: Was classified as important by the COE and requires
mitigation by them (sunfish, tadpoles, frogs were observed per the
PCN). However, I didn't get anything in my dip net during my visit.
Stream #3: Was classified by the COE as unimportant. The stream is
dissected by a road crossing. Above the crossing is a small wetland
area and the stream. Crayfish burrows seen, but none "caught". A baby ?
salamander was caught. Below the culvert (-50 ft) an adult crayfish
and 2 junior crayfish were "caught" in a pool. Thus I determined that
mitigation was required. Water was observed in the channel,
several/numerous large pools (2 ft deep, 3 feet wide) were in the
channel. There is strong stormwater flow down the stream.
His question: Because I found no biota in stream #1, then mitigation
not needed for #1 (by us). I found biota in #3. So he hopes: the COE
mitigates for #1, but not U. We mitigate for #3, not #1. Therefore
rather than mitigating for a total -600 ft for both streams, mitigation
is only required for the longer segment of the two streams.
I stated that if the COE calls mitigation for a stream I use that, plus
whatever I find in other streams on site.
I'm not sure this is clear, but that is in essence his question. Of
course when he was there doing the initial assessment Stream #3 was dry
and #1 was dry except for a small pool at the top. He has pictures.
Alan Johnson - [e-mail]
%TITLE%
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
Alan Johnson <[e-mail]>
%TITLE%
Div. of Water Quality
NC DENR - Mooresville
I of 1 10/22/2004 1:47 PM
-IZ
Triage Check List
Date: Project Name: (ad?
DWQ#: 0'Y
County: c-4
To: ? ARO Kevin Barnett ? WaRO Tom Steffens and Kyle Barnes
? FRO Ken Averitte ? WiRO Noelle Lutheran
MRO Alan Johnson ? WSRO Daryl Lamb
? RRO Mike Horan
From: Telephone : (919)
The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.
? Stream length impacted
? Stream determination
? Wetland determination and distance to blue-line surface waters on USFW topo maps
? Minimization/avoidance issues
? Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
? Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings?
? Cumulative impact concern
Comments: v) - l? sd -Ac- G6c'lr &0'4
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Website:
www.rwhitehead.com
1000 W. Morehead Street
suite zoo
Charlotte, NC 28208
Mailing Address:
Post Office Box 35624
Charlotte, NC 28235
704 372-1885 Voice
704 372-3393 Fax

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RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers
Charlotte Atlanta Jacksonville Richmond
Rock Hill Charleston Kansas City Raleigh
September 9, 2004
FEDEX
U.S. Army Corps of Engineers
Regulatory Field Office
151 Patton Avenue, Room 143
Asheville, NC 28801-5006
Attention: Ms. Amanda Jones
WETLANDS/ 401 GROUP
SEP 13 2004
WATER QUALITY SECTION
Subject: Section 404 Standard Individual Permit Application
Proposed Mallard Creek High School
Mecklenburg County, North Carolina n?
RWA Project No. 3045-101 3
USACE Action ID No. 2004308:03
Dear Ms. Jones:
On behalf of Charlotte-Mecklenburg Schools (CMS), Ralph Whitehead
Associates, Inc. (RWA) is submitting the attached ENG Form 4345 with
supplemental information (Attachment A), and accompanying figures and
supporting information, to request the issuance of a Department of the Army
Section 404 Standard Individual Permit in the above-referenced matter. CMS.
has retained RWA to act as its agent in matters related to wetlands permitting
services for this project. Reference Attachment A for an Agent Certification of
Authorization. Figures referenced in the ensuing discussion are included in
Attachment B.
Proposed Project Description
Charlotte-Mecklenburg Schools (CMS) constitutes the largest school system in
the state, expecting more than 117,000 students enrolled to begin the 2004-2005
school year (Charlotte Observer, 2004). Analysis shows that northeast
Mecklenburg County's area population has met a threshold to necessitate the
construction of a new high school. Existing densities of CMS high school
students, as well as areas of future growth, provide for long-term populating of a
school in this area. High schools currently in this area of the county include
North Mecklenburg High School, Vance High School, and Hopewell High School,
which are currently 153%, 167%, and 143% utilized respectively, without mobile
classrooms. North Mecklenburg High School and Vance High School have l a
combined capacity of 3,200 students. In the 2004-05 school year, 4,974
students are expected at these two schools, with continued growth expected.
There are currently 67 mobile classrooms at North Mecklenburg and Vance High
Schools. Construction of a new high school would have the potential to alleviate
overcrowding at the aforementioned high schools and accommodate on-going
growth within the area. Dramatic populations increases, evidenced by housing
developments and roadway improvements in the project area, may be
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Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 2 of 19
attributed, in part, to the construction of Interstate-485 (i.e., Charlotte's Outerloop) currently
underway.
The proposed project site currently being considered encompasses approximately 85 acres and
is located on Johnston-Oehler Road, contiguous with, and including a portion of, Mallard Creek
Community Park (Attachment B - Figures 1 and 2). The proposed site is located within an
approximate 515-acre property owned by Mecklenburg County, which also contains Mallard
Creek Community Park operated by Mecklenburg County Parks and Recreation (MCPR).
Mallard Creek High School is proposed to be constructed on a_ 52-acre portion of the project site
(Component 1). The proposed project activities also consist of a second component involving
the expansion of soccer facilities and affiliated parking on an additional 33-acre portion of the
adjacent park property (Component 11).
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Based on field review and aerial photography viewed on the Mecklenburg County Property
Ownership Land Records Information System (POLARIS), the proposed high school site is
predominantly wooded, includes a 0.8-acre pond, and houses a horticultural center, including a
greenhouse, shed, and storage areas, which are located within a compound (formerly Clark's
Plant Nursery) on an open area in the center of the site. This horticultural center is scheduled to
be relocated in the Fall 2004 to a more suitable area elsewhere on County property (see
Attachment J for additional information).
VThe 33-acre park expansion area is comprised of open areas with small, remnant pockets of
wooded areas. The entire project site (85 acres) encompasses the approximate 0.8-acre pond
and approximately 3, near fee o s rea a ition to several wetland areas totaling
approximately 4.9 acres. Inclu ed in on-si a we and areas is a Natural Heritage site, locally
referred to as Bingham Swamp, which is partially located on the project site. Bingham Swamp
is an upland depression swamp forest located on the northeast section of the property.
The proposed 2,000-student high school and supporting athletic fields, would consist of the
following major elements:
? 305,000 sf (gross), 3-story building, including:
o Auditorium
o Administrative space
o Cafeteria
? Athletic fields, including:
o Baseball field (1)
o Multi-use Football/Soccer
stadium w/ track (1)
o Practice field. (1)
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? Staff parking (approximately 162 spaces)
? Visitor parking (approximately 27 spaces)
? Student parking (approximately 254 spaces)
? School bus parking (approximately 41 spaces)
o Classrooms
o Gymnasium
o Kitchen
o Softball field (1)
o Tennis courts (8)
0 5K cross country trail
LS3P Associates is serving as the lead architect of CMS's design team, with Turnbull Sigmon
Design (TSD) providing landscape architecture and site civil services. The design scope was
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Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 3 of 19
determined based on a collaborative effort between CMS design staff and curriculum leaders
within the school district, as well as MCPR.
CMS high school sites are typically a minimum of 60 acres in size in order to accommodate all
standard program elements of a high school campus. Due to the relatively small size of the
proposed project site, in combination with existing environmental constraints, CMS cannot
accommodate the standard number of athletic fields. Due to environmental and topographical
challenges on this site, in addition to community requirements to maintain existing soccer fields,
CMS and MCPR have agreed to share athletic fields through a joint-use agreement. Through
the joint-use agreement, the high school would gain access to additional athletic fields that
could not be accommodated on the campus, while patrons of the park and county personnel
would have access to the school facilities for park and recreation purposes when not
used/occupied for school purposes. The incorporation of the school facility into the park will
efficiently utilize funding resources to effectively accomplish the county's park master plan and
CMBE's education needs and goals. In order to achieve the roiected August 2007 o enin ,
construction of the high school campus would nee to begin in early 15 u of 2005. It is
ark soccer fields and facilities would be graded during high
an icipa e a e a ditional
choo construction activities, but final construction woul not a completed until MCPR funding
becomes available. The high school elements, located on 52 acres west of Bingham Road, and
the soccer field expansion elements, located on 33 acres east of Bingham Road will be referred
to as Component I and Component II, respectively, throughout this permit application. Because
of the relatively small size of the proposed school site, impacts to jurisdictional waters of the
U.S., including wetlands, would be unavoidable.
Jurisdictional Waters of the U.S.
Jurisdictional waters of the U.S., including wetlands, were delineated on the proposed high
school site (Component 1) and park expansion site (Component II) by RWA in September and
October 2003. Wetlands were delineated utilizing the routine wetland determination
methodology outlined in the Corps of Engineers Wetland Delineation Manual (Environmental
Laboratory, 1987). In addition, stream quality assessments were conducted at that time.
On November 17, 2003, Ms. Amanda Jones of the USACE visited the subject property,
accompanied by Michael A. lagnocco, PWS, Senior Environmental Scientist, and Adam H.
Karagosian, PWS, Project Environmental Scientist, of RWA. Ms. Jones provided a jurisdictional
determination of the wetland delineation and stream quality assessments. These jurisdictional
waters of the U.S. were surveyed by R.B. Pharr and Associates, Inc., of Charlotte, North
Carolina (Attachments B - Figure 3A and 3B). Ms. Jones provided a written Waters of the U.S.
Survey/Delineation Verification, dated June 9, 2004 (Attachment D).
Jurisdictional waters of the U.S. on the combined 85-acre property include one 0.80-acre man-
made pond, four stream channels totaling 3,476 If, and 10 wetland areas totaling 4.9 acres. Of
the 4.9 acres of wetlands, approximately 4.1 acres are considered to be isolated and therefore
not subject to Clean Water Act Section 404 jurisdiction (but presumably subject to the
jurisdiction of the NC DWQ). These waters and wetlands are described below:
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Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 4 of 19
Component I - Proposed High School Site (Attachment B - Figures 4A and 46):
Pond - located in the center of Component / (Attachment C - Photograph 9): This is a man-
made pond created by damming the upstream most portion of Stream 1, an unnamed tributary
to Stony Creek. The pond is approximately 0.8 acre in size and is classified as an open water.
The upstream-most edge of the pond has been delineated as an emergent and scrub-shrub
wetland, described as Wetland A below.
Stream 1 - located in the southeastern portion of Component l (Attachment C - Photograph 2:
Stream 1 is an approximate 340 linear foot channel that originates below the base of the
aforementioned pond's earthen dam. The majority of the channel contained no water at the
time of site visits. However, sunfish (Lepomis sp.), tadpoles, and frogs were observed in a pool
at the upstream-most portion of the channel. Ms. Jones, of the USACE classified this stream as
aquatically important during her November 17, 2003 site visit. (Note: Based on the presence of
fish, this stream meets DWQ's definition of perennial.) Stream 1 has an approximate bankfull
width of four to six feet, and is generally one to four feet deep.
Stream 2 - located in the southern portion of Component / (Attachment- C - Photograph 3):
Stream 2 is a perennial unnamed tributary of Stony Creek. Crayfish, frogs, and tadpoles were
observed in the creek. Stream 2 has a bankfull width ranging from eight to 15 feet, is generally
three to five feet deep, and is approximately 1,806 If in length on the proposed high school site
(Component 1). Stream 2 reaches its confluence with Stony Creek approximately 0.3 mile
downstream (southeast) of the Component I boundary.
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Wetland A - located in the center of Component l (Attachment C - Photographs 4 and 5):
Wetland A includes a small emergent and scrub-shrub wetlands along the pond fringe, as well
as a linear wetland feature, upstream of the pond. The pond fringe and the linear wetland
feature are connected by a ditch determined to be a non-jurisdictional channel by the USACE.
Dominant vegetation in the pond fringe includes cattail (Typha latifolia), smartweed (Polygonum
sp.), soft rush (Juncus effusus), bearded sedge (Carex comosa), red-root flatsedge (Cyperus
erythrorhizos), silky dogwood (Cornus amomum), green ash (Fraxinus pennsylvanica), and red
maple (Acer rubrum). The source of water in Wetland A appears to be provided by overflow of
the pond, a shallow groundwater table upslope of the pond, and precipitation. The pond fringe
portion of Wetland A is approximately 0.20 acre; the linear portion of Wetland A is 0.09 acre in
size.
Wetland 8 - located in the center of Component 1: Wetland B is a forested wetland located
immediately adjacent to and downslope of the pond's earthen dam. Dominant vegetation
includes Nepal microstegium (Microstegium vimineum), trumpet creeper (Campsis radicans),
Japanese honeysuckle (Lonicera japonica), Chinese privet (Ligustrurn sinense), green ash,
sweetgum (Liquidambar styraciflua), red maple, and American sycamore (Platanus
occidentalis). The source of water in Wetland B appears to be provided by pond overflow
during rain events. Wetland B is 0.04 acre in size.
Wetland C - located in the northeast portion of Component / (Attachment C - Photograph 6):
Wetland C is an upland mafic depression that is contained within a regionally Significant Natural
Heritage Area referred to by North Carolina Natural Heritage Program (NCNHP) as the Bingham
Road Hardpan Forest. The wetland component of this natural heritage area contains a rare
upland depression swamp forest community, locally referred to as Bingham Swamp. Dominant
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Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 5 of 19
vegetation includes willow oak (Quercus phellos), northern red cedar (Juniperus virginiana),
loblolly pine (Pinus taeda), white oak (Quercus albs), and shagbark hickory (Carya ovata). The
source of water in Wetland C is presumed to be provided by seasonal inundation and saturation
via precipitation in the spring, as is commonly the case with mafic depressions. Wetland C
extends beyond the subject property boundary; this wetland is 3.87 acres in size on the subject
property (Component 1). The USACE has determined that Wetland C is isolated and therefore
not subject to Clean Water Act Section 404 jurisdiction. However, this wetland is presumed
subject to the jurisdiction of the North Carolina DWQ pursuant to 15A NCAC 02H.1300.
Wetland D - located in the southeastern portion of Component l: This wetland is adjacent to the
right bank of Stream 2 (unnamed tributary to Stony Creek), and is separated from the creek by a
natural levee. Wetland D is comprised of an emergent portion and a forested portion.
Dominant vegetation includes Nepal microstegium, smartweed, small fruit spikerush (Eleocharis
microcarpa), bearded beggar-ticks (Bidens aristosa), Japanese honeysuckle, red maple,
sweetgum, and slippery elm (Ulmus rubra). The source of water in Wetland D appears to be
provided by a shallow groundwater table. Secondary water sources likely include overbank
® flooding of the unnamed tributary of Stony Creek, and precipitation. Wetland D is 0.03 acre in
size.
Wetlands E, F, and G - located in the southwestern portion of Component 1 (Attachment C -
Photograph 7): Wetlands E, F, and G are each located within and adjacent to a sanitary sewer
right-of-way installed approximately one year ago, which parallels the unnamed tributary of
Stony Creek (i.e., Stream 2), and crosses the creek once in the vicinity of these wetland areas.
Wetland E is located adjacent to the right bank of the unnamed tributary of Stony Creek;
Wetlands F and G are located adjacent to the left bank. Dominant vegetation in these wetlands
include soft rush, taper-tip rush (Juncus acuminatus), red-root flatsedge, cattail, and an
unidentified grass. Both soils and hydrology have been altered in these wetland areas, likely a
result of sewer installation. Each of these wetlands discharge to the adjacent unnamed tributary
of Stony Creek (Stream 2) but do not appear to receive overbank flooding from the creek except
for infrequent storm events, considering the incised condition of the creek. A shallow
groundwater table and storm-water runoff from Johnston-Oehler Road appear to be primary
sources of water in Wetlands F and G. In addition, heavy clay content contributes to slow
permeability. A shallow groundwater table appears to be the primary hydrologic source for
Wetland E. A small portion of Wetland E has not been impacted by the sewer, and is
dominated by red maple, sweetgum, and greenbriar (Smilax rotundifolia). The sizes of these
wetlands are as follows: Wetland E is 0.003 acre; Wetland F is 0.12 acre; and Wetland G is 0.19
acre.
Wetland J - located in the southeastern portion of Component l: Wetland J is located adjacent
to the left bank of Stream 2. The previously-mentioned sanitary sewer right-of-way crosses
through Wetland J. Dominant vegetation includes green ash, American sycamore, ironwood,
and various grasses. The source of water in this wetland is presumably from a shallow
groundwater table, and infrequent overbank flooding of Stream 2 during rain events. Wetland J
is 0.10 acre in size.
® Component II - Proposed Park Expansion Site (Figure 4B):
Stream 3 - located in the southern portion of Component 11 (Attachment C - Photograph 8):
Stream 3 is an intermittent stream that originates from an approximately 42-inch culvert outlet at
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Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 6 of 19
the edge of an existing Mallard Creek Community Park soccer field. Stream 3 passes through a
culvert beneath the access road to the park's soccer fields, and eventually discharges to Stream
2 outside of the proposed project site. The upper half of Stream 3 contained pools of water but
no flow at the time of site visits. The lower half was dry. Ms. Jones of the USACE classified
Stream 3 as aquatically unimportant during her November 17, 2003 site visit. Stream 3 is
approximately 990 If in length, has an average bankfull width of approximately three to four feet,
and is generally one to three feet deep.
Stream 4 - located in the southern portion of Component ll: Stream 4 is an intermittent stream
located approximately 50 to 100 feet west of Stream 3. Stream 4 originates at a nick point in
the landscape and discharges to Stream 2 beyond the boundary of the Component II project
site. Stream 4 was dry at the time of site visits. Ms. Jones of the USACE classified Stream 4 as
aquatically unimportant during her November 17, 2003 site visit. Stream 4 is approximately 340
If in length, has an average bankfull width of approximately 2 feet, and is generally 1 to 2 feet
deep.
Wetland / - located in the northern portion of Component 11 (Attachment C - Photograph 9):
This wetland is a depression surrounded by woods and mowed fields. Dominant vegetation
includes soft rush, sweetgum, winged elm, American sycamore, blackberry (Rubus sp.), and
goldenrod (Solidago sp.). The source of water in this wetland is likely from precipitation and a
shallow groundwater table. Wetland I is 0.26 acre in size. The USACE has determined that
Wetland I is isolated and therefore not subject to Clean Water Act Section 404 jurisdiction.
However, this wetland is presumably subject to the jurisdiction of the NC DWQ.
Wetland K - located in the southern portion of Component 11 (Photograph 10): Wetland K is
located adjacent to, and contiguous with, the upper reaches of Stream 3. Dominant vegetation
includes green ash, Chinese privet, ironwood, sweetgum, and red maple. The source of water
is likely from a shallow groundwater table, and overbank flooding of Stream 3. Wetland K is
0.04 acre in size
Wetland Rating
In October 2003, RWA conducted functional assessments of the on-site wetlands, in
accordance with the fourth version of Guidance for Rating the Values of Wetlands in North
Carolina (NCDENR, 1995). The parameters assessed included water storage capacity, bank
and shoreline stabilization, pollutant/sediment removal, wildlife habitat, aquatic life value, and
recreation and education. Reference Table 1 for a summary of the findings of the assessments.
Each on-site wetland rated relatively low. Wetland K rated highest due primarily to its
connectivity to Stream 3. As a result, Wetland K receives overbank flooding, improving its rating
for bank stabilization and pollutant (e.g., sediment) removal. Wetland C also rated slightly
higher than other on-site wetlands, due primarily to its capacity to hold water, resulting in a
higher aquatic life value. The remaining wetlands were each rated relatively low, due primarily
to their small sizes. Reference Attachment F for the Wetland Rating Worksheets.
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Proposed Nlallard Creels High School
September 9, 2004
Page 7 of 19
Table 1. Wetland Functions[Values Assessment Rating
Rated Value
Water Bank Pollutant Wildlife Aquatic Recreation/ Total
Wetland Type Storage Stabolnzat- Removal Habitat Habitat Education Score

Emergent/
Wetland A Scrub-Shrub 4 8 5 2 4 2 29
Pond Fringe)
Wetland B Forested 4 0 5 2 8 1 20
Wetland
Wetland C Upland 4 0 5 4 16 2 31
Depression
Wetlands Forested 4 8 5 2 8 2 29
D and E Wetland
Wetlands
E
F, G, Emergent
4
8
5
0
8
1
26
,
and J Wetland
Wetland 1 Upland 0 0 5 2 12 1 20
Depression
Wetland K Forested 4 12 15 2 8 1 42
Wetland
Max.Sc
re 20 20 25 10 20 5 101*
l
Possib
* 1 point may be added to total if wetland is located in a sensitive watershed and >10% nonpoint source
disturbance within 1/2 mile upstream or upslope.
Purpose and Need
The Charlotte-Mecklenburg metro area has experienced tremendous growth in the past decade.
According to U.S. Census data, the population in Mecklenburg County grew by 36 percent
between 1990 and 2000, and grew an additional estimated 6.1 percent between April 2000 and
July 2002 (U.S. Census Bureau, 2004). This expansive growth has resulted in overcrowding in
large portions of the Charlotte-Mecklenburg School's system. According to the draft Long
Range School Facilities Master Plan, from 1994-95 to 2002-03, Charlotte-Mecklenburg Schools'
enrollment increased, on average, by approximately 2,800 K-12 children each year. CMS
estimated that by the 2003-2004 school year, they would be educating more than 112,000 K-12
students, and by 2012-13, K-12 enrollment is projected to be more than 150,000 (CMS, 2003).
CMS is expecting enrollment of more than 117,000 students to begin the 2004-2005 school year
(Charlotte Observer, 2004). The Long-Range School Facilities Master Plan provides a
comprehensive analysis of the trends, issues, and factors that combine to create the need for
new schools and additions to existing schools. Analysis shows that CMS must build new
schools and additions/renovations to existing schools to alleviate overcrowding and provide
quality education for children in the community. In response to this need, the Charlotte-
Mecklenburg community passed a multi-million dollar bond referendum in 2000 and another in
2002 to help address the growing student population.
Analysis shows that northeast Mecklenburg
necessitate the construction of a new high
students, as well as areas of future growth,
County's area population has met a threshold to
school. Existing densities of CMS high school
provide for long-term populating of a school in this

Section 404 Individual Permit Application
Proposed Mallard Creek High School
September 9, 2004
Page 8 of 19
area. High schools currently in this area of the county include North Mecklenburg High School,
Vance High School, and Hopewell High School, which are currently 153%, 167%, and 143%
utilized respectively, without mobile classrooms. North Mecklenburg High School and Vance
High School have a combined capacity of 3,200 students. In the 2004-05 school year, 4,974
students are expected at these two schools, with continued growth expected. There are
currently 67 mobile classrooms at North Mecklenburg and Vance High Schools. Construction of
a new high school would have the potential to alleviate overcrowding at the aforementioned high
schools and accommodate on-going growth within the area. Dramatic populations increases,
evidenced by housing developments and roadway improvements in the project area, may be
attributed, in part, to the construction of Interstate-485 (i.e., Charlotte's Outerloop) currently
underway.
In addition to the new high school, MCPR has expressed a need for additional soccer fields,
particularly at Mallard Creek Community Park. Expansion of Mallard Creek Community Park
soccer fields is necessary to alleviate the high demand for the existing fields, while also
providing adequate regulation athletic fields for student athlete competitive play.
Alternatives Review
To select the most suitable site for a new high school within northeastern Mecklenburg County,
CMS evaluated potential sites using standards that reflect the needs and concerns expressed in
the Long-Range School Facilities Master Plan and that allow consistent, equitable comparison
of potential sites. To accomplish successful site selection for all new schools, CMS developed a
two-stage site selection "filter." The first stage considers basic site features, such as the
approximate geographic spacing between and among schools of like grade configuration, site
size (needs to be of sufficient size, shape, and configuration to be agreeable to the physical
layout of a school campus), roadway frontage, and previous site uses that may create
development restrictions (e.g., landfill, quarry). If a site lacks any of the required basic features,
it is eliminated from further consideration (CMS 2003).

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Nine sites were evaluated for the proposed high school, seven of which did not progress
successfully through the first filter stage. Lack of thoroughfare frontage, transecting utility
easements, zoning factors, and unwilling sellers eliminated the viability of these seven sites.
CMS continued their review, evaluating the two remaining sites further, utilizing the second
stage of the site selection filter. The second stage of evaluation compares all remaining
potential sites to determine the most viable with regards to potential attendance patterns,
proximity to other schools, overcrowding and growth concerns, diversity in student population,
availability of public infrastructure, and consistency with existing land-use and strategy plans. A
numeric scale is utilized to evaluate each of these categories based on the ability of the site to
match the stated standard.
After comparing the two sites to this list of required features, it became apparent that Mallard
Creek Community Park would serve as the most suitable location for a new high school.
Mallard Creek Community Park is a 515-acre, county-owned park, encompassing softball fields,
soccer fields, a volleyball court, picnic shelters, and a playground, as well as wooded and open
areas throughout. Public infrastructure is readily available, and a joint-use opportunity would
exist between MCPR and the CMS curriculum. After concluding that Mallard Creek Community
Park would best serve CMS, the following alternatives were closely considered for development
of the high school campus:
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Proposed Mallard Creek High School
September 9, 2004
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Alternative A: Build School on Existing Soccer Fields
Alternative A, as put forth by CMS, was to build the high school on the existing soccer fields
located in Mallard Creek Community Park, i.e., in the "Component II" portion of the project area.
In doing so, impacts to environmental resources, such as wetlands and streams, would be
potentially reduced, as would site work and grading. The project team proposed re-building the
soccer fields on the adjoining, largely undeveloped, 52-acre portion of the park situated west of
Bingham Road and west of the existing fields.
The Northeast Park District Advisory Council, in conjunction with MCPR, conducted a
community workshop in August 2003 to gain citizen input on this option. Area citizens attending
the workshop were boisterous in their opposition to demolish the existing fields, which cost
approximately two million dollars to construct. In addition to the additional cost of building new
fields, area citizens also vehemently criticized the plan because of concerns that playing
schedules on the busy fields would be totally disrupted for an extended period of time (Smith,
2003). To acknowledge the community's input, Alternative A was removed from consideration
and other alternatives, such as that described below, were subsequently evaluated in more
detail.
Alternative B: Build School on Largely Undeveloped 52-acre parcel
Alternative B consisted of building the high school on the largely undeveloped 52-acre parcel
located within Mallard Creek Community Park, and adjacent to the Alternative A site described
above. A former commercial plant nursery, now utilized by MCPR as a horticultural facility, and
housing a small greenhouse, shed, and storage areas, is located on a four-acre open area in
the center of the site. Though this parcel meets the requirements outlined above, the site does
pose some development challenges, primarily due to its size. A CMS high school campus
typically encompasses approximately 60-70 acres, including the buildings, parking lots, and
athletic fields. After manipulating the campus layout to decrease the project footprint (including
utilizing a three-story building, eliminating some student parking as well as a dedicated soccer
stadium), the CMS design team was largely able to successfully overlay the program elements
within the 52 acres. However, the limited site size, in combination with existing environmental
constraints, forced the design team to also eliminate several practice and soccer fields. The
CMS design team was willing to concede these athletic fields under the possibility of entering an
agreement with the County to utilize existing soccer fields on the adjacent park property as part
of the high school curriculum. To alleviate the high demand for the existing park fields, while
also providing adequate regulation-size athletic fields for student athlete competitive play, an
expansion of the athletic facilities at Mallard Creek Community Park was proposed as part of the
agreement.
A second community workshop was conducted and those in attendance supported this
alternative to develop the school on the 52-acre parcel west of Bingham Road, leaving the
existing soccer fields on the park property intact.
i After careful consideration, it was determined that though the site is smaller than desired, this
52-acre site fulfills the requirements for design, especially given that the County was willing to
enter into a joint-use agreement with CMBE. This site is additionally appropriate in that the
County is currently in the process of relocating the MCPR horticultural facility from the 52-acre
parcel to a larger site that would better accommodate MCPR's needs. (Note: As currently
planned, the relocation of this facility will not result in impacts to waters of the U.S., including
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Proposed Mallard Creek High School
September 9, 2004
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wetlands. Additional information regarding the relocation of this facility, including environmental
review details, is located in Appendix J.) Bingham Road would need to be improved (paved)
and widened to accommodate bus and automobile traffic needing access to the school.
Bingham Road, currently a gravel street, would be widened in order to accommodate school
traffic as well as continue to serve private residences.
Though CMS can largely accommodate the high school campus elements within the 52 acres,
the project site does pose some development challenges, including topography, a pond, a
Natural Heritage site, and drainage features that dissect the site. Largely due to these site
constraints, impacts to on-site streams and wetlands would be unavoidable. CMS considered
numerous site plan iterations to avoid and minimize impacts, and to determine which alternative
would result in the least amount of environmental impact while best achieving the project's
purpose and need.
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CMS also evaluated the option of acquiring other properties adjacent to the 52-acre parcel in an
effort to evaluate additional options and further avoid/minimize impacts. CMS contacted
adjacent property owners to the north and northwest of the proposed high school parcel to
discuss the sale of their property. Owners were unwilling to sell their property for future
development of a high school.
No Action Alternative
A no-action alternative was also considered for the proposed project. However, the no-action
alternative has been eliminated, as it is not reasonable given the current over-crowded status of
Mecklenburg County high school classrooms in this part of the county. Consequences of not
providing additional academic facilities in northeastern Mecklenburg County include increases in
class sizes, thus resulting in increases in the student to teacher ratio; increases in the number of
mobile classrooms, which provide a less than optimal learning environment; and increases in
travel distances and vehicular miles to transport students to other schools in the county.
Without an additional high school in northeastern Mecklenburg County, CMS will not be able to
efficiently satisfy the educational needs for many children in Mecklenburg County's northeastern
communities.
Avoidance and Minimization
Due to the relatively small size of the proposed school site (52-acres in comparison to typical
CMS high school sites which are generally 60 to 70 acres in size), opportunities to avoid and
minimize impacts to waters of the U.S. were limited. The proposed school site (Component 1)
contains approximately 0.8 acre of jurisdictional wetland area. Impacts to approximately 0.4
acre, or 50% of jurisdictional Section 404 wetlands, have been avoided through careful site
layout, as well as changes in school program/design elements, e.g., elimination of a dedicated
soccer stadium and multiple practice fields, design of a vertical (3-story) classroom building,
reductions in student parking, and incorporating a 5K cross-country trail within the main
campus. Specifically, impacts to Wetlands C, D, E, F, G, and I have been avoided completely.
In addition, of the 4.1 acres of isolated wetlands, 3.87 acres or 94% have been avoided.
Specifically, the site was laid out to avoid the wetland element of the Bingham Road Hardpan
Forest, a designated natural heritage site.
Impacts to Stream 2 were minimized by reducing the culvert length to be installed, utilizing wing
walls in the design and by positioning the culvert in proximity to the existing culvert to be
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Proposed Mallard Creek High School
September 9, 2004
Page 11 of 19
replaced. Approximately 150 If of impact is anticipated (excluding the existing 33 linear foot
culvert that is to be removed) of the 1,806 If of Stream 2 located within Component I of the
project. Thus, the vast majority of Stream 2 (92%) has been avoided by the project. In addition,
impacts to Streams 3 and 4 in Component II were minimized to the maximum extent practicable.
Impacts to approximately 50% of these unimportant streams have been avoided.
Impacts to Waters of the U.S.
Despite the above avoidance and minimization measures, the proposed project would result in
unavoidable impacts to jurisdictional waters of the U.S., including wetlands (Attachment B -
Figures 5A and 5B). Impacts associated with the proposed school (Component 1) would result
from the placement of fill material in Stream 1, Wetlands A, B, and J, and the man-made pond in
order to grade the site for construction of the school and attendant features (Attachment B -
Figures 6 and 7). Only clean fill material will be used. At the onset of construction, the man-
made pond will be drained. A French drain will be installed in Stream 1 (with clean fill placed
over) in order to convey groundwater from the Pond, and Wetlands A and B. This French drain
will tie to Stream 2 at the location of the existing Stream 1/Stream 2 confluence. In addition,
impacts to Stream 2 (Component 1) would result from the placement of an approximate 60-foot,
36" diameter double culvert and associated wing walls and riprap apron for the proposed
improvement/widening of Bingham Road (Attachment B - Figure 7). The bottom of the culvert
will be buried below the streambed to accommodate the passage of low flow and aquatic life.
An existing 33-foot, 36" diameter double culvert beneath Bingham Road will be removed as part
of the road realignment and widening, and that portion of the channel restored. The proposed
park expansion (Component 11) would result in impacts to Streams 3 and 4, and Wetland K
(Attachment B - Figure 8) from the placement of clean fill material. See Table 2 for impact
totals.
The entire high school and park expansion project will result in the permanent loss of 0.80 acre
of open water (jurisdictional pond), 0.429 acre of jurisdictional wetland and waters, and 490 If of
impacts to aquatically important stream channel (Streams 1 and 2). (Note: The construction of
tournament soccer fields as part of the park expansion will result in impacts to approximately
663 If of unimportant intermittent stream channel. Impacts to unimportant intermittent stream
channel have been calculated as 'waters' acreage for purposes of determining impacts and
compensatory mitigation.)
Impacts to Isolated Waters: The proposed project would also impact all of Wetland 1 (0.26 acre).
Impacts to Wetland I would result from the placement of fill for grading and construction of a
needed new soccer field as part of Component II (Attachment B - Figure 9). Through this
application, CMS is requesting a North Carolina Isolated Wetlands Permit for impacts to
Wetland 1.

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Proposed Mallard Creek High School
September 9, 2004
Page 12 of 19
TABLE 2
I PROPOSED IMPACTS TO WATERS OF THE U.S.
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Water/Wetland Impact Type Impact Total
(Wetland and
Waters Acres Impact Total
(Open Water
Acres Impact Total
(LF)
Component I
Pond Fill -- 0.8 --
Stream 1 Fill -- 340
Stream 2 Culvert -- 150"
Wetland A Fill 0.29 --
Wetland B Fill 0.04 --
Wetland J Fill 0.005
Component II
Stream 3** Fill 0.05 --
Stream 4** Fill 0.004 --
Wetland K Fill 0.04 --
TOTAL 0.429 0.8 490
* Impact total for Stream 2 measured along centerline of stream.
** Aquatically unimportant intermittent stream impact (663 If) provided as acreage.
Conceptual Compensatory Mitigation
The compensatory mitigation ratio to satisfy both the DWQ and USACE is anticipated to range
from 1:1 to 2:1 (mitigation: impacts). CMS has reviewed potential on-site mitigation opportunities
in Mallard Creek Community Park. In addition, CMS has obtained a verbal commitment from
the City of Charlotte to utilize the City's Umbrella Stream and Wetland Mitigation Bank. CMS
proposes the following compensatory mitigation to offset permanent losses to wetlands and
streams:

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Preservation of 3.87 acres of Bingham Swamp (Wetland C) situated on the subject
property (see additional information below) via deed restriction (Attachment B - Figure
10). At a 5.5:1 ratio, this wetland preservation compensates for the project's
approximate 0.69 acre of wetland loss (i.e., 0.429 acre of wetlands and waters subject to
Section 404, and 0.26 acre of isolated wetland loss [Wetland 1]). In addition, CMS
proposes to include approximately 0.8 acre of upland wooded buffer situated between
Bingham Swamp and the construction limits as part of the deed restriction. Bingham
Swamp is further discussed below under the heading State Natural Area.
Preservation of a stream buffer along 1,580 If of Stream 2, situated west of Bingham
Road (Attachment B- Figure 11). The stream buffer will be 35 feet wide on each side of
the stream, measured from top-of-bank, and will be preserved via a deed restriction.
The buffer will be crossed during construction activities for the placement of the French
drain. In addition, an existing sanitary sewer easement is located along the northeastern
edge of the buffer. The preserved buffer will not include easements associated with the
existing sanitary sewer. At an anticipated 5:1 ratio, this stream preservation would
provide for compensatory mitigation for approximately 316 If of the 490 If of project
impacts to aquatically important (perennial) stream channel.
The balance of stream impacts would be compensated for through purchase of
mitigation credits from the City of Charlotte's Umbrella Stream and Wetland Mitigation
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Proposed Mallard Creek High School
September 9, 2004
Page 13 of 19
Bank and/or the North Carolina Ecosystem Enhancement Program (EEP).
Correspondence from EEP regarding their availability to undertake mitigation for this
project is included in Attachment F.
Stabilization/restoration of that portion of Stream 2 daylighted as a result of the removal of the
existing culvert would occur as part of the Bingham Road improvements. Streambank replanting
with native plant materials would additionally help to mitigate impacts associated with
construction activities.
Potential impacts to jurisdictional wetlands associated with sedimentation and erosion would be
® minimized through the implementation and maintenance of a State-approved erosion and
® sedimentation control plan.
Storm Water Management
A storm water management system would be designed to convey storm water drainage from all
buildings roofs, canopies, parking lots, and other areas within Component I by appropriate
® drains to building drains and connections with on-site storm sewers. The.proposed grading of
the high school campus (Component l) and the park expansion site (Component II) would be
separated into two drainage basins, due primarily to the high amount of impervious area
associated with the school campus. Storm water would be directed to separate water quality
basins, each designed to achieve 85 percent removal of total suspended solids. Treated storm
water would ultimately be conveyed via level spreaders towards Stream 2. A SWIM buffer
exists along Stream 2 and would further assist water quality by providing an additional level of
treatment as a filter strip between the level spreaders and Stream 2.
The Component I drainage basin is approximately 50 acres in size, with a total impervious area
encompassing 55% of the area. The water quality basin designed to treat Component I storm
water is located adjacent to the proposed softball field in the southeast portion of the proposed
school site (Attachment B - Figure 4A). This water quality basin has a surface area of 24,500 sf
(required surface area is 23,958 sf) and a pond depth of 8 feet.
The Component II drainage basin is approximately 43.4 acres in size, with total impervious area
encompassing 15% of the area. The water quality basin designed to treat Component II storm
water is located adjacent to existing baseball fields in the southeast portion of the proposed park
expansion site (Attachment B - Figure 4B). This water quality basin has a surface area of
12,310 sf (required surface area is 11,326 sf) and a pond depth of 6 feet. There is currently no
storm water management on the existing park site.
A key condition of the Section 404 wetlands permit and the Section 401 water quality
certification would be the design and implementation of a storm water management plan
(SWMP). The SWMP would be reviewed and certified by North Carolina DWQ and part of the
Section 401 water quality certification process.
Threatened and Endangered Species
RWA contacted the appropriate state and federal agencies requesting information regarding
protected species within the project area. A Request for Evaluation was forwarded to the U.S.
Fish and Wildlife Service (USFWS) and to the North Carolina Natural Heritage Program
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September 9, 2004
Page 14 of 19
(NCNHP). Correspondence from the USFWS has not been received to date, but a copy of
RWA's correspondence to USFWS is included in Attachment G. Correspondence from the
NCNHP is included in Attachment H.
A search of the NCNHP database provided existing information concerning the potential
occurrence of threatened or endangered species within Mecklenburg County, North Carolina
(NCNHP, 2003). This database indicates that there are eight federal and/or state threatened or
endangered species that may occur in Mecklenburg County as listed below. Two of these
species are not known to currently exist in Mecklenburg County and are listed as historical
occurrences.
TABLE 3
PROTECTED SPECIES - MECKLENBURG COUNTY
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Species Federal State Status County Status
Status
Bald eagle T T Current
Haliaeetus leucoce halus
Carolina heelsplitter E E Historic
Lasmi ona decorata
Schweinitz's sunflower E E Current
Helianthus schweinitzii
Michaux's sumac E E-SC Historic
Rhus michauxii
Carolina creckshell FSC E Current
Villosa vau haniana
Tall larkspur FSC E Historic
(Delphinium exaltatum
Georgia aster C T Current
Aster eor ianus
Smooth coneflower E E-SC Current
Echinacea laevi ata
Reference: NCNHP online database (NCNHP, 2003).
T = Threatened, E = Endangered, C = Candidate, FSC = Federal Species of Concern, SC = Species of
Concern
Bald eagle (Haliaeetus leucocephalus) Federally/State Threatened
The bald eagle is found throughout North America from northern Alaska and Canada, south to
southern California and Florida. The bald eagle is associated with coasts, rivers, and lakes,
usually nesting near large bodies of water where it feeds. Nesting habitat in the southeast
usually occurs in pine or cypress trees. The bald eagle is listed as a current record for
Mecklenburg County. Such records have been limited to Latta Plantation Nature Preserve,
e Cowan's Ford Wildlife Refuge, and the Catawba River, all of which are located along the outer
limits of Mecklenburg County.
Carolina heelsplitter (Lasmigona decorata) Federally/State Endangered
The Carolina heelsplitter, native to the Carolinas, historically occupied creeks within the
Catawba and Yadkin Pee-Dee River Basins. This species require streams that contain stable,
well-shaded streambanks and well oxygenated clean water (MCDEP, 2000). However, due to
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September 9, 2004
Page 15 of 19
habitat alteration and water quality degradation only six populations of the species are presently
known to exist. Of the six populations, two occur within North Carolina. In North Carolina one
small remnant population occurs in the Catawba River system in Waxhaw Creek, a tributary to
the Catawba River, in Union County, North Carolina, and another small population occurs in a
short stretch of Goose Creek, a tributary to the Rocky River in the Pee Dee River system, in
Union County, North Carolina (USFWS, 2002). These locations are approximately 20 to 25
miles south/southeast of the proposed Mallard Creek High School location.
Schweinitz's sunflower (Helianthus schweinitzii) Federally/State Endangered
This perennial plant generally occurs along clearings, roadsides, utility rights-of-way, field
edges, and infrequently mowed areas where periodic maintenance preserves an open canopy.
Twelve known populations exist within the County. Correspondence with NCNHP did not
indicate any of these populations within proximity to the proposed project area.
Michaux's sumac (Rhus michauxii) Federally/State Endangered
This shrub grows in sandy or rocky open woods in association with basic soils. Once known
from three states, Georgia, South Carolina, and North Carolina, this plant now has viable
populations only in North Carolina. This plant is restricted to seven counties in North Carolina.
Michaux's sumac appears to have been extirpated from Mecklenburg County. However, in
November 2001, a total of 29 female plants were transplanted from Wake County, NC to Latta
Plantation Praire (20 plants) and to Shuffletown Prairie (9 plants). These locations are
approximately 12 miles west of the proposed project area.
Carolina creekshell (Villosa vaughaniana) State Endangered
The Carolina creekshell is endemic to the Carolinas and its range includes the Catawba and
Yadkin Pee-Dee River Basins in North and South Carolina and portions of the Cape Fear River
Basin in North Carolina. Its distribution in Mecklenburg County includes Goose and Mallard
Creek subbasins (The Nongame and Endangered Wildlife Program, 2000). The Carolina
creekshell is usually found in silty sand or clay along the banks of small streams. In areas of
abundance, they have also been found occupying substrates of mixed sand and gravel (The
Nongame and Endangered Wildlife Program, 2000).
Tall larkspur (Delphinium exaltatum) State Endangered
This perennial plant is listed as an obscure record and has not been documented in
Mecklenburg County in at least the last 50 years.
Georgia aster (Symphyotrichum georgianum) State Threatened
The Georgia aster is a perennial plant that is typically found in well-drained sunny locations.
This plant prefers open woods and roadside or utility rights-of-way, where periodic maintenance
preserves an open canopy. Additionally, this plant is often found in Piedmont prairie habitat,
growing with other associates of that rare community, including smooth coneflower and
Schweinitz's sunflower.
Smooth coneflower (Echinacea /aevigata) State Endangered
This perennial plant generally occurs in basic to circumneutral soils of meadows and
woodlands. Smooth coneflower typically prefers upland oak-hickory or mixed oak-pine forests,
old field habitat, roadsides, and utility rights-of-way. There is one documented population of
smooth coneflower in Mecklenburg County located approximately 12 miles northwest of
Charlotte.
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September 9, 2004
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The list of protected species was reviewed, and evaluations were performed regarding the
likelihood of the presence of each species within the project area. Field reviews of Component I
were conducted in September and October, and areas on the project site that matched
descriptions of preferred habitat for protected species listed in the above table were classified
as potential protected species habitat. The field review revealed that Schweinitz's sunflower,
smooth coneflower, and Georgia aster were the most likely to occur on the project area. The
majority of the study area consists of wooded areas and a cleared/maintained area currently
occupied by former nursery facility buildings. Footpaths, a power easement, and a sewer
easement are also located on site, and could provide potential habitat for the aforementioned
plants. During a field review, on October 23, 2003 (during the optimal survey window when
1 these three plants are in their flowering period), RWA Biologists Jennifer Schwaller and Adam
Karagosian determined that none of these areas demonstrate ideal growing conditions. Much
of the aforementioned areas of potential habitat were overgrown with saplings, and invasive
species such as Japanese honeysuckle and blackberry. Considering the limited amount of
potential habitat in the study area, and the prevalence of aggressive and invasive species within
the footpaths and power easement, the likelihood that these species are present in the study
area is concluded to be remote.
Field reviews of Component II were conducted in November, and areas on the project site that
matched descriptions of preferred habitat for protected species listed in the above table were
classified as potential protected species habitat. The field review revealed that none of the
protected species listed above were likely to occur on the project site. The majority of the
Component II area consists of previously disturbed open areas, with small remnant pockets of
wooded areas. During the field review, RWA Biologist Adam Karagosian determined that none
of these areas demonstrate ideal habitat for any of the aforementioned species. The likelihood
that these species are present in the study area is concluded to be remote.
The Carolina heelsplitter and Michaux's sumac have not been observed in Mecklenburg County in
over 20 years, and it is unlikely that either of these species still exist in Mecklenburg County.
Therefore, it is not anticipated that the proposed project would impact either of these protected
species. The bald eagle typically nests near large bodies of water, such as lakes and rivers, in
large pine or cypress trees. The proposed project is not expected to impact large bodies of
waters in Mecklenburg County, and large pine or cypress trees suitable for nesting were not
observed on site. The proposed project should not impact the bald eagle or its habitat.
Based on our field reconnaissance and correspondence with the NCNHP, RWA's assessment
has determined that the likelihood of the proposed Mallard Creek High School and associated
park expansion affecting federally and/or state-listed species is remote.
State Natural Area
Correspondence from the North Carolina Natural Heritage Program indicates the presence of
Bingham Road Hardpan Forest, a regionally Significant Natural Heritage Area on the proposed
school site (Attachment H). A formal survey/demarcation of this natural heritage area has not
been completed by the NCNHP. However, based on communications/correspondence with the
NCNHP, this heritage area, encompassing approximately 10 acres, is located partially within the
northeastern limits of the proposed 52-acre school site. This natural heritage area includes
occurrences of two rare natural communities - Xeric Hardpan Forest and Upland Depression
I Swamp Forest. Approximately four acres of this natural area are owned by Mecklenburg
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Proposed Mallard Creek High School
September 9, 2004
Page 17 of 19
County, while the remainder is privately owned. As part of the wetland delineation and USACE
boundary verification process completed on the school site, the boundary of the Upland
Depression Swamp Forest, as it occurs on the County property, has been determined and
surveyed.
Construction and future operation of the proposed Mallard Creek High School would be located
outside the wetland boundary limits of the Bingham Road Hardpan Forest natural heritage site.
Significant grading on the proposed high school portion of the project (Component 1) would
necessitate impacts to the portion of the wooded upland buffer situated between the wetland
boundary and proposed school site. Unavoidable impacts to the upland wooded buffer would
occur in order to accommodate the bus entrance onto the school campus from Bingham Road.
Proposed improvements to Bingham Road were shifted eastward during design in order to
avoid impacts to the wooded areas that border the existing gravel drive. The proposed bus
entrance road was shifted south away from the wetland boundary to the maximum extent
practicable while still maintaining safe ingress of vehicles. Undisturbed upland wooded buffer
widths along the southern boundary of the wetland area would range from less than five to
greater than 50 feet. The creation of new artificial forest edges and the associated loss of
habitat may prove unfavorable for wildlife utilizing the natural heritage area._
Bingham Swamp is approximately 10 acres in size, approximately four acres of which is located
on County property and would remain intact as a result of avoidance measures that would be
taken by CMS. The 3.87-acre wetland element will be preserved via a deed restriction. It is
anticipated that this deed restriction will also include the upland wooded area (approximately 0.8
acre) that is situated between the proposed school construction limits and the wetland
boundary. The remaining acreage is in private ownership (Attachment B - Figure 10). CMS
evaluated the option of acquiring the remainder of Bingham Swamp in an effort to preserve the
natural heritage area site. CMS contacted adjacent property owners to the north and northwest
of the proposed high school parcel to discuss the sale of their property. At the time of this
writing, a resolution with adjacent property owners has not been reached. While CMS is
committed to working with the owners to acquire the property, based on preliminary discussions
and offers, it does not appear that acquisition of these properties will be economically feasible.
Cultural Resources
Pursuant to the National Historic Preservation Act, Executive Order 11593, and the
Archaeological and Historic Preservation Act, the State Historic Preservation Office (SHPO) was
contacted to determine if the proposed project would affect historic, architectural,
archaeological, or cultural sites listed on or eligible for listing on the National Register of Historic
Places. Correspondence from the SHPO indicates that they are not aware of any historic
resources that would be affected by the project (Attachment 1). A review of the Charlotte-
Mecklenburg Historic Landmarks Commission List of Designated Historic Landmarks did not
reveal any locally designated historic landmarks in the immediate vicinity of the proposed
e project.
A cultural resources review was previously completed for other past activities proposed within
Mallard Creek Community Park. The limited review, conducted by Coastal Carolina Research,
Inc., in 1999, revealed one archaeological site, 31 MK506, within the boundaries of the park
property, near the southern limits of the proposed high school site. This archaeological site has
not been recommended as eligible for the National Register of Historic Places (NRHP).

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September 9, 2004
Page 18 of 19
Additionally, based on project plans, it does not appear that development of the proposed high
school would impact this site.
State Environmental Policy Act
This project will be publicly funded by CMS. Based on projected impacts to perennial streams
and wetlands during preliminary design, a State Environmental Policy Act (SEPA)
Environmental Assessment (EA) has been prepared. The Draft EA was submitted to DWQ for
completeness review on September 1, 2004. A hard copy and electronic copy of the Draft EA
have been included for your use.
Cumulative Impacts
The State Environmental Policy Act (SEPA) requires that cumulative effects of the project be
considered in conjunction with the direct and indirect impacts. The environmental review
process was initiated with a scoping letter dated November 6, 2003, submitted to the North
Carolina State Clearinghouse. Agency correspondence emanating from the scoping process
was valuable in considering cumulative impacts that may be associated with the proposed high
school and park expansion project. Cumulative impacts have been evaluated on the basis of
natural resources, ecosystems, and human communities. Impacts associated with the
development of the proposed project include, but are not necessarily limited to, non-point
source pollution emanating from storm-water runoff, wetland reduction and loss of waters of the
U.S., conversion of forestry soils currently supporting woodlands, and wildlife habitat loss.
However, it is anticipated that these impacts would be minimized, provided that the project is
implemented in accordance with the impact avoidance and mitigation measures contained in the
EA (copy enclosed), thus minimizing their contribution to cumulative impacts. Temporary
impacts to surface waters that may result from construction of the proposed project would be
minimized by adherence to a NCDENR-approved sedimentation and erosion control plan
pursuant to the Sedimentation and Pollution Control Act. The Section 404 wetlands permit and
the Section 401 water quality certification, hereby applied for, will be required to authorize
construction activities. A key condition of the permit would be the design and implementation of
a Storm Water Management Plan. The SWMP would be reviewed and certified by North
Carolina DWQ and part of the Section 401 water quality certification process. The SWMP will
be designed to achieve 85% removal of total suspended solids emanating from the developed
school site.
Much of the surrounding area of the proposed high school site consists of already developed
and/or maintained areas. Dramatic populations increases, evidenced by housing developments
and roadway improvements in the project area, may be attributed, in part, to the on-going
construction of Interstate-485 (i.e., Charlotte's Outerloop). A segment of the 1-485 corridor will
be built within one-half mile of the proposed project area, prompting a number of roadway
realignments and improvements in the area. Future development within the proposed project
area would be subject to zoning and/or other local ordinances, as applicable. Mecklenburg
County has an existing Comprehensive Land Use Plan, which is utilized to identify and direct
growth through a well-reasoned set of land use and county development plans and
implementation policies. The plan provides a framework for making planning and zoning
decisions, promoting orderly land use, and implementing public improvements. Future
development would be governed by Mecklenburg County's Land Use Plan, Zoning Ordinance,
Subdivision Ordinance, SWIM Stream Buffer ordinance, storm water management
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Proposed Mallard Creek High School
September 9, 2004
Page 19 of 19
requirements, and other planning documents. Mecklenburg County's zoning ordinance
exemplifies the County's proactive approach to land use and development activities within the
county. The Zoning Ordinance has been designed to protect the value and enjoyment of
existing development, while encouraging compatible, safe, and practical new development.
Future impacts to jurisdictional waters of the U.S., including wetlands, would be subject to
federal and state regulations in accordance with Section 404 of the Clean Water Act. The
existing regulations and ordinances governing ongoing future development in the project area
will serve to minimize their respective contributions to cumulative impacts.
Closing
Your expeditious review of this Section 404 Individual Permit Application would be greatly
appreciated. Copies of this permit application have been forwarded to the NCDWQ to facilitate
the Section 401 Water Quality Certification process, as well as to request a North Carolina
Isolated Wetlands Permit for impacts to Wetland 1 (0.26 acre). If you have any questions or
need additional information concerning this project, please contact either of the undersigned at
[phone].
Sincerely,
RALPH WHITEHEAD ASSOCIATES, INC.
Adam H. Karagosian, P. S.
Project Environmental Scientist
Michael A. lag p&J, P.W.S.
Project Manage /Senior Scientist
AHK/MAI:ak
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Attachments: Attachment A: ENG Form 4345 and Supplemental Information, Agent
Certification of Authorization
Attachment B: Figures
Attachment C: Photographs
Attachment D: Wetland Survey, USACE Notification of Jurisdictional
Determination, Representative Wetland Data Forms and Stream
Assessment Forms
Attachment E: Wetland Rating Worksheets
Attachment F: Correspondence from Ecosystem Enhancement Program
Attachment G: Correspondence to U.S. Fish and Wildlife Service
Attachment H: Correspondence from N.C. Natural Heritage Program
Attachment I: Correspondence from State Historic Preservation Officer
Attachment J: Horticultural Facility Relocation Site Information
cc: Mr. John Dorney, NCDWQ (7 copies)
Mr. Mike Higgins, CMS
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Attachment A
ENG Form 4345 and Supplemental Information
Agent Certification of Authorization'
s
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT OMB APPROVAL NO. 0710-0003
(33 CFR 325/ Expires December 31, 2004
The Public burden for this collection of information is sestimated to average 10 hours per response, although the majority of applications should require
5 hours or less. This includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and
completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of
information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Service Directorate of Information
Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302; and to the Office of Management and Budget,
Paperwork Reduction Project (0710-0003), Washington, DC 20503. Respondents should be aware that notwithstanding any other provision of law,
no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control
number. Please Do NOT RETURN your form to either of thosa addresses. Completed applications must be submitted to the District Engineer having
jurisdiction over the location of the proposed activity.
PRIVACY ACT STATEMENT
Authorities: Rivers and Harbors Act, Section 10, 33 USC 403; Clean Water Act, Section 404, 33 USC 1344; Marine Protection , Research and
Sanctuaries Act, 33 USC 1413, Section 103. Principal Purpose: Information provided on this form will be used in evaluating the application for a
permit. Routine Uses: This information may be shared with the Department of Justice and other federal, state, and local government agencies.
Submission of requested information is voluntary, however, if information is not provided the permit application cannot be evaluated nor can a permit
be issued.
One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
application (sea sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed
activity. An application that is not completed in full will be returned.
/ITEMS 1 THRU 4 TO RE FILLED BY THE CORPS
1. APPLICATION NO. 2. FIELD OFFICE CODE 3. DATE RECEIVED 4. DATE APPLICATION COMPLETED
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/ITEMS BELOW TO HE F/l I fn nV APPI JrdAM
5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE (en scent is not reoulredl
Charlotte-Mecklenburg Board of Education Mr. Michael lagnocco, P.W.S.
c/o Construction Management Services Senior Environmental Scientist
6. APPLICANT'S ADDRESS- 9. AGENT'S ADDRESS
3301 Stafford Drive Ralph Whitehead Associates, Inc.
Charlotte, NC 28208 1000 W. Morehead Street, Suite 200
Attention: Mr. Anthony Ansaldo Charlotte NC 28208
7. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
a. Residence a. Residence
b. Business 980-343-5310 b. Business 704-372-1885
11. STATEMENT OF AUTHORIZATION
I hereby authorize, to act in my behalf as my agent in the processing of this application and to
furnish, upon request, supplemental information in support of this permit application.
APPLICANT'S SIGNATURE DATE
NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY
12. PROJECT NAME OR TITLE rsce nsuucvins,
Mallard Creek High School
13. NAME OF WATERBODY. IF KNOWN n/-di-id.i 14. PROJECT STREET ADDRESS atapp#wae)
U.T. of Stony Creek
15. LOCATION of PROJECT Johnston-Oehler Road and Bingham Road
Mecklenburg NC
COUNTY STATE
16. OTHER LOCATION DESCRIPTIONS, IF KNOWN, (see instructions!
Lat/Long: 35.3641°N, 80.7666°W. Tax Parcels 02933107 and 02933110
17. DIRECTIONS TO THE SITE
1-85 to Mallard Creek Church Road West (exit 46B). Right onto Mallard Creek Road. Left onto
Johnston-Oehler Road. Left onto Bingham Road. The site is located on both sides of Bingham
Road, south of Johnston-Oehler Road.
NG FORM 4346, Jul 97 EDITION OF FEB 94 IS OBSOLETE. (Proponent: CECW-OR)
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18. Nature of Activity (0gcdPliondpojecr,MC1Weu11reertueS)
See Attached Supplemental Information
19. Project Purpose r0maribe the reason or pupate of me project, see xsrfuctin j
See Attached Supplemental Information
USE BLOCKS 20-22 IF DREDGED ANDIOR FILL MATERIAL IS TO BE DISCHARGED
20. Reason(s) for Discharge
See Attached Supplemental Information
21. Type(s) of Material Being Discharged and the Amount of Each Tvoe in Cubic Yards
See Attached Supplemental Information
22. Surface Area in Acres of Wetlands or Other Waters Filled rseeInstructiou/
See Attached Supplemental Information -
23. Is Any Portion of the Work Already Complete? Yes = No IF YES. DESCRIBE THE COMPLETED WORK

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.A. Addresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (If more than can be entered here,
please attach a supplemental list).
See Attached Supplemental Information
25. List of Other Certifications or Approvals/Denials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL' IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATE DENIED
'Would include but is not restricted to zoning, building and flood plain permits
26. Application is hereby made for a permit or permits to authorize the work desc"' ed in this application. I certify that the information in this
application is complet"o and accu at . I further certify that 1 possess the thor ty to undertake the work described herein or am acting as the
duly authoriz a ent f the a pl' ant.
SIGNATURE OF APPLICANT DATE SIGNATURE F ENT DATE
The application must be signed by the person who desires to undertake the proposed activity (applicant) or it may be signed by a duly
authorized agent if the statement in block 11 has been filled out and signed.
18 U.S.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States
knowingly and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or
fraudulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious or
fraudulent statements or entry, shall be fined not more than $ 10,000 or imprisoned not more than five years or both.

AGENT CERTIFICATION OF AUTHORIZATION
I ? `N? , representing Charlotte-Mecklenburg Schools,
hereby certify that I have authorized Michael A. Iaenoceo, P.W.S. of Ralph Whitehead
Associates, Inc., to act on my behalf and take all actions necessary to the Processinba
,
issuance, and acceptance of this permit and all standards and special conditions attached.
We hereby verify that the above information submitted in this application is true and
accurate to the best of our knowledge.
Applicant's signature Agent's signa
Date Date
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Completion of this form will allow the agent to sign all future application correspondence.

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Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
18. Nature of Activity (Description of project, include all features):
The proposed project site currently being considered encompasses approximately 85
acres and is located on Johnston-Oehler Road, contiguous with, and including a
portion of, Mallard Creek Community Park (Attachment B - Figure 1). Mecklenburg
County owns the proposed project site. The proposed site is located within the
approximate 515-acre Mallard Creek Community Park operated by Mecklenburg
County Parks and Recreation (MCPR). Mallard Creek High School is proposed to be
constructed on a 52-acre portion of the project site (Component 1). The proposed
project activities also consist of a second component involving the expansion of
soccer facilities and affiliated parking on an additional 33-acre portion of the adjacent
park property (Component II) (Attachment B - Figure 1). The entire project site (85
acres) contains an approximate 0.8-acre man-made pond and approximately 3,476
linear feet (If) of stream, in addition to several wetland areas totaling approximately
4.9 acres. Of the 4.9 acres of on-site wetlands, approximately 4.1 acres have been
determined by the U.S. Army Corps of Engineers to be isolated, and therefore not
subject to Section 404 of the Clean Water Act. Included in on-site isolated wetland
areas is a Natural Heritage site, locally referred to as Bingham Swamp, which is
partially located on the project site. Bingham Swamp is an upland depression
swamp forest located on the northeast section of the property.
The proposed 2,000-student high school and supporting athletic fields, would consist
of the following major elements:
? 305,000 sf (gross), 3-story building, including:
o Auditorium o Classrooms
o Administrative space o Gymnasium
o Cafeteria o Kitchen
? Athletic fields, including:
o Baseball field (1) o Softball field (1)
o Multi-use Football/Soccer o Tennis courts (8)
stadium w/ track (1) 0 5K cross country trail
o Practice field (1)
? Staff parking (approximately 162 spaces)
? Visitor parking (approximately 27 spaces)
? Student parking (approximately 254 spaces)
? School bus parking (approximately 41 spaces)
CMS high school sites are typically a minimum of 60 acres in size in order to
accommodate all standard program elements of a high school campus. Due to the
relatively small size of the proposed project site, in combination with existing
environmental constraints, CMS cannot accommodate the standard number of
athletic fields. The Charlotte-Mecklenburg Board of Education (CMBE) has therefore
entered into a joint-use agreement with the County that would serve to expand the
number of soccer facilities on the adjacent park property. Through the joint-use
agreement, the high school would gain access to additional athletic fields that could
not be accommodated on the campus, while patrons of the park and county
P
Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
personnel would have access to the school facilities for park and recreation purposes
when not used/occupied for school purposes. The incorporation of the school facility
into the park will efficiently utilize funding resources to effectively accomplish the
county's park master plan and CMBE's education needs and goals. The proposed
campus layout, including the proposed soccer field expansion, is presented in
Figures 4a and 4b (Attachment B). Because of the relatively small size of the
proposed school site, impacts to jurisdictional waters of the U.S., including wetlands,
A would be unavoidable.
The project would disturb 490 If of aquatically-important (perennial) stream,
approximately 0.054 acre (663 If) of intermittent unimportant stream, a 0.80-acre
man-made pond, and several minor on-site wetlands, totaling 0.375 acre. (Note: the
park expansion would also impact an isolated wetland not subject to Section 404,
totaling 0.26 acre.) Impacts to all wetlands, the pond, and 3 of 4 four jurisdictional
stream channels will result from the placement of fill material. Reference the Section
404 Permit Application cover letter for descriptions of existing on-site wetlands.
® Only clean fill material will be used. At the onset of construction, the man-made
pond will be drained. A French drain will be installed in Stream 1 (with clean fill
placed over) in order to convey groundwater from the Pond, and Wetlands A and B.
This French drain will tie to Stream 2 at the location of the existing Stream 1/Stream
2 confluence. In addition, impacts to Stream 2 (Component 1) would result from the
placement of an approximate 60-foot, 36" diameter double culvert and associated
wing walls and riprap apron for the proposed improvement/widening of Bingham
Road (Attachment B - Figure 7). Impact to one stream (Stream 2) will result from the
installation of a 60-foot culvert and associated wing walls and riprap apron for the
proposed improvement/widening of Bingham Road, resulting in total stream impacts
of 150 If (measured along the stream centerline). The culvert will be buried to
accommodate the passage of low flow and aquatic life. An existing 33-foot, 36"
diameter double culvert beneath Bingham Road will be removed as part of the road
realignment and widening, and that portion of the channel restored. The proposed
park expansion (Component 11) would result in impacts to Streams 3 and 4, and
® Wetland K (Attachment B - Figure 8) from the placement of clean fill material.
The compensatory mitigation ratio to satisfy both the DWQ and USACE is
anticipated to range from 1:1 to 2:1 (mitigation: impacts). CMS has reviewed
potential on-site mitigation opportunities in Mallard Creek Community Park. In
addition, CMS has obtained a verbal commitment from the City of Charlotte to utilize
the City's Umbrella Stream and Wetland Mitigation Bank. CMS proposes the
following compensatory mitigation to offset permanent losses to wetlands and
streams:
¦ Preservation of 3.87 acres of Bingham Swamp (Wetland C) situated on the
subject property (see additional information below) via deed restriction
(Attachment B - Figure 10). At a 5.5:1 ratio, this wetland preservation
compensates for the project's approximate 0.69 acre of wetland loss (i.e., 0.429
acre of wetlands and waters of the U.S. subject to Section 404, and 0.26 acre of
isolated wetland loss [Wetland 1]). In addition, CMS proposes to include
1 approximately 0.8 acre of upland wooded buffer situated between Bingham
1

Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
Swamp and the construction limits as part of the deed restriction. Bingham
Swamp is further discussed below.
¦ Preservation of a stream buffer along 1,580 If of Stream 2, situated west of
Bingham Road (Attachment B- Figure 11). The stream buffer will be 35 feet wide
on each side of the stream, measured from top-of-bank, and will be preserved via
a deed restriction. The buffer will be crossed during construction activities for the
placement of the French drain. In addition, an existing sanitary sewer easement
is located along the northeastern edge of the buffer. The preserved buffer will
not include easements associated with the existing sanitary sewer. At an
anticipated 5:1 ratio, this stream preservation would provide for compensatory
mitigation for approximately 316 If of the 490 If of project impacts to aquatically
important (perennial) stream channel.
¦ The balance of stream impacts would be compensated for through purchase of
mitigation credits from the City of Charlotte's Umbrella Stream and Wetland
Mitigation Bank and/or the North Carolina Ecosystem Enhancement Program
(EEP). Correspondence from EEP regarding their availability to undertake
mitigation for this project is included in Attachment F. (Note: The City has
1 undertaken planning efforts toward utilizing the Stony Creek watershed for its
mitigation bank.)
Correspondence from the North Carolina Natural Heritage Program indicates the
presence of Bingham Road Hardpan Forest, a regionally Significant Natural Heritage
Area on the proposed school site (Attachment H). A formal survey/demarcation of
this natural heritage area has not been completed by the NCNHP. However, based
on communications/ correspondence with the NCNHP, this heritage area,
encompassing approximately 10 acres, and is located partially within the
northeastern limits of the proposed 52-acre school site. This natural heritage area
includes occurrences of two rare natural communities - Xeric Hardpan Forest and
Upland Depression Swamp Forest. Approximately four acres of this natural area are
owned by Mecklenburg County, while the remainder is privately owned. As part of
the wetland delineation and USACE boundary verification process completed on the
school site, the boundary of the Upland Depression Swamp Forest, as it occurs on
the County property, has been determined and surveyed.
Construction and future operation of the proposed Mallard Creek High School would
be located outside the wetland boundary limits of the Bingham Road Hardpan Forest
natural heritage site. Significant grading on the proposed high school portion of the
project (Component 1) would necessitate impacts to the portion of the wooded upland
buffer situated between the wetland boundary and proposed school site.
Unavoidable impacts to the upland wooded buffer would occur in order to
accommodate the main bus entrance onto the school campus from Bingham Road.
Proposed improvements to Bingham Road were shifted eastward during design in
order to avoid impacts to the wooded areas that border the existing gravel drive. The
proposed bus entrance road was shifted south away from the wetland boundary to
the maximum extent practicable while still maintaining safe ingress of vehicles.
Undisturbed upland wooded buffer widths along the southern boundary of the
wetland area would range from less than five to greater than 50 feet. The creation of
new artificial forest edges and the associated loss of habitat may prove unfavorable
for wildlife utilizing the natural heritage area.
r
Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
Bingham Swamp is approximately 10 acres in size, approximately four acres of
which is located on County property and would remain intact as a result of avoidance
measures that would be taken by CMS. The 3.87-acre wetland element will be
preserved via a deed restriction. It is anticipated that this deed restriction will also
include the upland wooded area (approximately 0.8 acre) that is situated between
the proposed school construction limits and the wetland boundary. The remaining
acreage is in private ownership (Attachment B - Figure 11). CMS evaluated the
option of acquiring the remainder of Bingham Swamp in an effort to preserve the
natural heritage area site. CMS contacted adjacent property owners to the north and
northwest of the proposed high school parcel to discuss the sale of their property. At
the time of this writing, a resolution with adjacent property owners has not been
reached. While CMS is committed to working with the owners to acquire the
property, based on preliminary discussions and offers, it does not appear that
acquisition of these properties will be economically feasible.
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Stabilization/restoration of that portion of Stream 2 daylighted as a result of the
removal of the existing culvert would occur as part of the _ Bingham Road
improvements. Streambank replanting with native plant materials would additionally
help to mitigate impacts associated with construction activities.
Potential impacts to jurisdictional wetlands associated with sedimentation and
erosion would be minimized through the implementation and maintenance of a State-
approved erosion and sedimentation control plan.
19. Project Purpose (Describe the reason of purpose of the project)
The Charlotte-Mecklenburg metro area has experienced tremendous growth in the
past decade. According to U.S. Census data, the population in Mecklenburg County
grew by 36 percent between 1990 and 2000, and grew an additional estimated 6.1
percent between April 2000 and July 2002 (U.S. Census Bureau, 2004). This
expansive growth has resulted in overcrowding in large portions of the Charlotte-
Mecklenburg School's system. According to the draft Long Range School Facilities
Master Plan, from 1994-95 to 2002-03, Charlotte-Mecklenburg Schools' enrollment
increased, on average, by approximately 2,800 K-12 children each year. CMS
estimated that by the 2003-2004 school year, they would be educating more than
112,000 K-12 students, and by 2012-13, K-12 enrollment is projected to be more
than 150,000 (CMS, 2003). CMS is expecting enrollment of more than 117,000
students to begin the 2004-2005 school year (Charlotte Observer, 2004). The Long-
Range School Facilities Master Plan provides a comprehensive analysis of the
trends, issues, and factors that combine to create the need for new schools and
additions to existing schools. Analysis shows that CMS must build new schools and
additions/renovations to existing schools to alleviate overcrowding and provide
quality education for children in the community. In response to this need, the
Charlotte-Mecklenburg community passed a multi-million dollar bond referendum in
2000 and another in 2002 to help address the growing student population.
4

Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
Analysis shows that northeast Mecklenburg County's area population has met a
threshold to necessitate the construction of a new high school. Existing densities of
CMS high school students, as well as areas of future growth, provide for long-term
populating of a school in this area. High schools currently in this area of the county
include North Mecklenburg High School, Vance High School, and Hopewell High
School, which are currently 153°/x, 167%, and 143% utilized respectively, without
mobile classrooms. North Mecklenburg High School and Vance High School have a
combined capacity of 3,200 students. In the 2004-05 school year, 4,974 students
are expected at these two schools, with continued growth expected. There are
currently 67 mobile classrooms at North Mecklenburg and Vance High Schools.
Construction of a new high school would have the potential to alleviate overcrowding
at the aforementioned high schools and accommodate on-going growth within the
area. Dramatic populations increases, evidenced by housing developments and
roadway improvements in the project area, may be attributed, in part, to the
construction of Interstate-485 (i.e., Charlotte's Outerloop) currently underway.
In addition to the new high school, MCPR has expressed a need for additional
soccer fields, particularly at Mallard Creek Community Park. Expansion of Mallard
Creek Community Park soccer fields is necessary to alleviate the high demand for
the existing fields, while also providing adequate regulation or tournament-sized
® athletic fields for student athlete competitive play.
As part of this project, CMS plans to relocate an existing horticultural center currently
located on the proposed school site. The horticultural center is scheduled to be
relocated in the Fall 2004 to a more suitable area elsewhere on County property (see
Attachment K for additional information). No additional impacts to wetlands or
waters will occur on the new horticultural center site.
In order to achieve the projected August 2007 opening, construction of the high
school campus would need to begin in early 15t Quarter of 2005. It is anticipated that
the additional park soccer fields and facilities would be graded during high school
construction activities, but final construction would not be completed until MCPR
® funding becomes available.
20. Reason for Discharge
Impacts associated with the proposed school (Component 1) would result from the
placement of fill material in Stream 1, Wetlands A, B, and J, and the pond in order to
grade the site for construction of the school and attendant features (Attachment B,
Figures 6 and 7). In addition, impacts to Stream 2 (Component 1) would result from
the placement of an approximate 60-foot culvert and associated wing walls and
riprap apron for the proposed improvement/widening of Bingham Road (Attachment
B - Figure 7). The proposed park expansion (Component II) would result in impacts
to Streams 3 and 4 and Wetland K in order to grade the site for the construction of
needed new soccer fields (Attachment B - Figure 8).
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Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
21. Type of Material Being Discharged
Excavation would be needed to remove plastic soils that are not suitable for
construction. CMS intends to possibly utilize these soils under the proposed soccer
fields, or dispose of them in a suitable on-site upland area or off-site at a certified
spoils location. Some borrow material is anticipated to come from soccer field
grading or would be obtained from a certified borrow location. Borrow sources or
spoils would not be allowed in any area under the U.S. Army Corps of Engineer's
(USACE's) regulatory jurisdiction without the appropriate permit(s). In an effort to
minimize the amount of borrow material needed for fill within Component I, it is
anticipated that CMS would utilize the soils excavated from Component II grading
activities to the maximum extent practicable.
22.
PROPOSED IMPACTS TO WATERS OF THE U.S.
Water/Wetland Impact Type Impact Total
(Wetland and
Waters Acres Impact Total
(Open Water
Acres Impact Total
(LF)
Component I
Pond Fill -- 0.8 --
Stream 1 Fill -- 340
Stream 2 Culvert -- 150*
Wetland A Fill 0.29 --
Wetland B Fill 0.04 --
Wetland J Fill 0.005
Component II
Stream 3** Fill 0.05 --
Stream 4** Fill 0.004 --
Wetland K Fill 0.04 --
TOTAL 0.429 0.8 490
* Impact total for Stream 2 measured along centerline of stream.
** Aquatically unimportant intermittent stream impact (663 If) provided as acreage.
The entire high school and park expansion project will result in the permanent loss of
0.80 acre of open water (jurisdictional pond), 0.429 acre of jurisdictional wetland and
waters, and 490 If of impacts to aquatically important (perennial) stream channel
(Streams 1 and 2). (Note: The construction of tournament soccer fields as part of the
park expansion will result in impacts to approximately 663 If of unimportant intermittent
stream channel. Impacts to unimportant intermittent stream channel have been
calculated as 'waters' acreage for purposes of determining impacts and compensatory
mitigation.)
Impacts to Isolated Waters: The proposed project would also impact all of Wetland 1
(0.26 acre). Impacts to Wetland I would result from the placement of fill for grading and
construction of a needed new soccer field as part of Component II (Attachment B -
Figure 9). Through this application, CMS is requesting a North Carolina Isolated
Wetlands Permit for impacts to Wetland I.
6
Mallard Creek High School
Section 404 Individual Permit Application
Supplemental Information
September 9, 2004
Fill operations will be conducted with standard construction equipment, e.g., backhoes,
bulldozers, grading pans, etc.
24. Addresses of adjoining property owners
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Parcel Property Owner Parcel Address Mailing Address
Number
02930130 Elizabeth G. Howard 3916 Johnston 3916 Johnston Oehler Road
Oehler Road Charlotte, NC 28269
02930131 Clark Jack Hoyle, Jr. 3900 Johnston 3900 Johnston Oehler Road
Oehler Road Charlotte, NC 28269
02930194 Leslie S. Martin 3530 Johnston 3530 Johnston Oehler Road
Oehler Road Charlotte, NC 28269
02933103 Mecklenburg County 3001 Johnston 600 E. 4 Street, 11 ffi Floor
Real Estate/Finance Oehler Road Charlotte, NC 28202-2816
Department
02933104 Charles H. Oehler 3115 Johnston 3115 Johnston Oehler Road
and Dorothy B. Oehler Road Charlotte, NC 28269
Oehler
02933105 Myrtle P. Thompson 3551 Johnston 3716 Johnston Oehler Road
Oehler Road Charlotte, NC 28269
02933106 Dorothy Bingham 3487 Johnston 3115 Johnston Oehler Road
Oehler and Charles Oehler Road Charlotte, NC 28269
H. Oehler
02933108 Conway Raeford 3801 Johnston 3801 Johnston Oehler Road
Patterson and Meryl Oehler Road Charlotte, NC 28269
M. Patterson
02933109 Conway Raeford 3749 Johnston 3801 Johnston Oehler Road
Patterson and Meryl Oehler Road Charlotte, NC 28269
M. Patterson
02933114 W.S. Cansler and 3477 Johnston 3477 Johnston Oehler Road
Julie C. Cansler Oehler Road Charlotte, NC 28269
02933116 Scott L. Dixon and 3473 Johnston 3473 Johnston Oehler Road
Doris O. Dixon Oehler Road Charlotte, NC 28269
02946192 Joy C. Hipp 4001 Johnston PO Box 480111
Oehler Road Charlotte, NC 28269-5300
02962101 O.O. Thompson, Jr. 3440 Johnston 3440 Johnston Oehler Road
Oehler Road Charlotte, NC 28269
02962103 M.B. Wallace, Jr., and Johnston Oehler 2350 W Lucas St., Apt 206
Ruth Wallace Road Florence, SC 29501-1237
02962104 Jefferey F. Meyer and 12221 Jimmy Oehler 12221 Jimmy Oehler Road
Catherine R. Mayer Road Charlotte, NC 28269
02962105 Ritchie Clarence 3308 Johnston 3308 Johnston Oehler Road
Ross and C. Yvonne Oehler Road Charlotte, NC 28269
Poole
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Attachment B
Figures
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Proposed Mallard Creek RALPH WHITEHEAD Project Area
High School
Mecklenburg County ASSOCIATES, INC. FIGURE 1
North Carolina
Mecklenburg County Vicinity Map
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Not l o Scale
• • - Drainage Features
On-Site Soil Map Units
EnD - Enon sandy loam, 8-15% slopes
IrA - Iredell fine sandy loam, 0-1% slopes
IrB - Iredell fine sandy loam, 1-8% slopes
MeB - Mecklenburg fine sandy loam, 2-8% slopes
MO - Monocan soils
WkD - Wilkes loam, 8-15% slopes
Proposed Mallard Creek
High School W RALPH WHITEHEAD
Mecklenburg County ASSOCIATES, INC.
North Carolina
Soil Survey
FIGURE
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WETLAND'E'AREA: 1? 0.80ACRE

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written verification of the wetland boundary
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2. Wetlands Survey peformed and provided by 1r I I
WETLAND
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8/12/04
PROPOSED MALLARD CREEK HIGH SCHOOL 250 0 125 250 D Y BY:
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COMPONENT I
SCHOOL SITE
- CHECKED BY:
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/
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9TR 1 - - ?- /
NOTES:
i. Jurisdictional waters of the U.S., including
wetlands, were delineated in thefield by Ralph
Whitehead Associates, Inc., in September and
October soo3. The boundaries ofjurisdictional
713E R ACRE \ yya•, tsabarrtd
APPROXIM E DTH 4 FEET ?. ^'.°'
° l ??• wetlands/waters were marked inthefield. The
delineation was verified by the U.S. Army Corps

r ---.
-
, --------- ?•?
WETLAND'X'AREA:
811 BQ. FT. OR 0.04
of Engineers (USAGE) on November t7,2003• A

written verj/cationofthewettandboundary
survey was provided by the USACE on June 9,
2004.
1 ?
° Wetlands Survey peformed and provided by
1. 1 . . .
Pharr ?pASSOCiates
P
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,
.
.
.
.
LEGEND

EXIS77N0 A t4 00000001 ¦ ¦ 0000000 BOUNDARY LINE
elasAo soli ? PERENNIAI. STREAM
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l
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er• t nsME s 0000110001 UNIMPORTANT 9TRt±,t n,

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341 LINEAR FEET 0.02 ACRE r?
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778 LIN F ET 0.07 ACRE ° a
( OPEN WATER
j
APPROXIMA NNEL WIDTH 4 FEET o e
WATERS OF THE U.S. AND WETLANDS BOUNDARYMAP

PROPOSED MALLARD CREEK HIGH SCHOOL
C SCALE
GRAPHI DATE:
08/12/04
2s 2so DRAWN BY:
PARK EXPANSION SITE - COMPONENT II 250 D JLS
CHECKED BY:
N
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.
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Mec
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I Inch - 250(L 3B

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0901/04
PROPOSED MALLARD CRE 0
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CHOOL 250 GRAPHIOC SCALE25 250 D 09801/04
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H
CHOOL
GRAPHI0 SCALE DATE'.

09/01/04
PROPOSED MALLARD CREEK HIG
S 250
125 250 N Y:
IMPACT AREAS - COMPONENT I - SCHOOL JLS
CK ED BY:

Mecklenburg County, N.C. ( IN FEET) GU RE NO.
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U.S. ARMY CORPS OF ENGINEERS
WILNIINGTON( DISTRICT
0.1
Action Id. 200430232 County: Mecklenburg U.S.G.S. Quad: Derita
NOTIFICATION OF JURISDICTIONAL DETERNMNATION
Property Owner/Agent: Charlotte-'Necklenburg Schools. Attn: llr. Mike I3i!jgins
Address: 3301 Stafford Drive
Charlotte. NC 23203
Telephone No.:
Size and location of property (waterbody, road name/number, town, etc.) The site for the proposed Mallnrd Creek High
School is located on the south side of Johnston Oehler Road. adiacent to Bingham Road. in Charlotte. Mecklenburg
Countv. North Carolina.
Indicate Which of the Following Apply:
_ Based on preliminary information, there may be wetlands on the above described property. We strongly suggest you have
this property inspected to determine the extent of Department of the Army (DA) jurisdiction. To be considered final, a
jurisdictional determination must be verified by the Corps.
X There are waters of the U.S. including wetlands on the above described property subject to the permit requirements of
Section 404 of the Clean Water Act (CWA)(33 USC § 1344). Unless there is a change in the law or our published
regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification.
_ We strongly suggest you have the wetlands on your property delineated. Due to the size of your property and/or our
present workload, the Corps may not be able to accomplish this wetland delineation in a timely manner. For a more timely
delineation, you may wish to obtain a consultant. To be considered final, any delineation must be verified by the Corps.
_ The waters of the U.S. including wetland on your property have been delineated and the delineation has been verified
by the Corps. We strongly suggest you have this delineation surveyed. Upon completion, this survey should be reviewed
and verified by the Corps. Once verified, this survey will provide an accurate depiction of all areas subject to CWA
jurisdiction on your property which, provided there is no change in the law or our published regulations, may be relied
upon for a period not to exceed five years.
X The waters of the U.S. including wetlands have been delineated and surveyed and are accurately depicted on the plat
signed by the Corps Regulatory Official identified below on 6/9/2004. Unless there is a change in the law or our published
regulations, this determination may be relied upon for a period not to exceed five years from the date of this notification.
_ There are no waters of the U.S., to include wetlands, present on the above described property which are subject to the
permit requirements of Section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law or our
published regulations, this determination may be relied upon for a period not to exceed five years from the date of this
notification.
The property is located in one of the 20 Coastal Counties subject to regulation under the Coastal Area Management Act
(CAMA). You should contact the Division of Coastal Management in Washington, NC, at (M) 946-6431 to determine
their requirements.
Remarks: related AID 200430$93
Corps Regulatory Official: I
Date 06/09/2004 xpiration Date 06/09/2009
Page 1 of 2
0
0
Action Id. 20043 0232
Placement of dredged or fill material within waters of the US and/or wetlands without a Department of the Army permit may
constitute a violation of Section 301 of the Clean Water Act (33 USC § 1311). If you have any questions regarding this
determination and/or the Corps regulatory program, please contact Amanda .Tones at 328-271-7980.
a Basis For Determination: The site contains wetland, stream channels. and open waters with indicators of ordinary high
a waters located adjacent to and includin(, unnamed tributaries to Stonev Creek in the Catawba River Basin.
Corps Regulatory Official (Initial):
FOR OFFICE USE ONLY:
• A plat or sketch of the property and the wetland data form must be attached to the file copy of this form
• A copy of the "Notification Of Administrative Appeal Options And Process And Request For Appeal" form must be
transmitted with the property owner/agent copy of this form.
• If the property contains isolated wetlands/waters, please indicate in "Remarks" section and attach the "Isolated
Determination Information Sheet" to the file copy of this form.
Page 2 of 2
a
0
Jyeam 2

NCDWQ Stream Classification Form
Project Name:malIGtrGI N orjv I RiverBasin: 'lad 166
;9h Sc h County:rnP/ l
?? eY)lJC(2j

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Evaluator.
J
DWQProject Number. Nearest Named Sueamv () y!?OLatitud0 '6ySSr
6- ????yy
""
Si nature L{??y
Date: 101 7 103 USGS QUAD: j?eY l l „
* L
/
Longitude: F0' fvyy7 Location/Dircetionss: J 1 L,'P r ?_M'9,.-,
PLEASE NOTE. If evaluator and landowner agree that the feature i
Al
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b
i s a man-made ditch, then use ofthis for m is not necessary. o /t 4_ . s /_r?a{•Y
'1- t nu.. -?

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e
estprofess
onai judgement of the evaluator, the feature is a
rating system should not be used'
man-made ditch and not a modified nna 7
tural 'rrrea. this
e, h ><' ?t? t? Vt C_ R_„
Primary Field Indicators: (CircleoneNnmberPertlne)
1
G
.
eomor holo,rv Absent Weak Moderate Strong
1) Is There A Riffle-Pnol Sequence? 0 I

D 2) Is The USDA Texture In Stmambed

Dit .-rent From Surroundine Terrain? 0
"?
?C2
1
3) Are Natural Lcvees Present? 0 I 1
l 3
4) Is The ri,nnrl Cmnrn,c9 n t /t
Z
5) Is There An Active (Or Relic)
Secondary Field Indicators: (Circle One Number Per line)
1) Is There A Hcad Celt present [n Channel? 0 ? I _ v ( S
2) Is There A Grade Control Point In Channel? 0 5 l 1.5
3) Does Topography Indicate A
Nnniral Drnihaec Wav? 0 5 I I $ )
SECONDARY GEOJIORPHOLOGYINDICATOR POINTS:
a IT. Hvdrnln-v Absent Weak Moderate Strnmr
1) Is This Years (Or Last's) Lcatlincr
Present In Streambcd? 1. 1 S 0
2 Is Sediment 0 Plants r Debris Present? 0
- W ck Lines Present? 0
4) Is Water In Channel And >43 Hrs. Since 0 .5 I 1.5
Last Knn-n. Rain? t•VOIT 12fr4 /-di'Ved !n tln 0- et?- nil Orr 4,d n R•t •?
5) Is There Water In Channel During Dry 0 1 1.5
Conditions Or In Growing Season ?
a 6 )Are Hvdric Soils Prescnt l ides Of Channel r In Headcut ?
YnaO
Yes-1.5
SECONDARYHYDROLOGY INDICATORPOINTS.
0
SECONDARYBIOLOGY INDICATOR POINTS. 1 TOTAL POINTS (Primant +, ='1 S v
Secnndarv) __(If Greater Than Or Equal To 19 Points The Stream Is At Least Intermittent)
IT. Hvdrolo,rv Absent Weak Moderate Strnn!!
1) Is There A Groundwater ?
Flow/Discharge Present? (O l 1 2 3
PRIMARYHYDROLOGY INDICATOR POINTS:
oI rue "cuanu riants to )treamoeat SAY Mostly OBL Mostly FACW Mostly FAC Mostly FACU Mostly UPL
(• jVOT£: Ifrotal Absence OfAlI Plants In Streambed 2 1 .75 .5 t) 0
As Noa•d 0" - SFin n's f'o UVt_ESC SA V Prrrc r•1
Q `
USACE AID# DWQ # Site #5 (indicate on attached map)
;ate STREAM QUALITY ASSESSMENT WORKSHEET .p.?(
gal : '
D
Provide the following information for the stream reach under assessment:
1. Applicant's name: hoYl SIG- e(' Kier) CC dJ 2. Evaluator's name: J erlt'll ?1? it I(il?l I I PJ,
3. Date of evaluation: 912-51o3 11 4. Time of evaluation: //:0 0 D?
5. Name of stream: ! 1 U crtT K Tom: 1 6. River basin: \VA6 K 1 n
7. Approximate drainage area: ti g o o A(.. S. Stream order: I Sto >r d t?y-
9. Length of reach evaluated: :-:7) C) 10. County:
McM 1rn bl u 1j NIA
11. Site coordinates (if known): prefer in decimal degrees. 12. Subdivision name (if any)::1 P ' r 1 r' r
Latitude (ex.34.872312)N 35•?`f?5(v Longitude (ex.-17.556611): " OnY 0L/4t `'t
0 Method location determined (circle): GPS opo Sheet Ortho (Aerial) Photo/GIS Other GIS Other
13. Location of reach under evaluation (note nearby roads and landmarks and attach map identifying stream(s) location): Sf h F1??
?purox. 15Cb' is o? Johrti'mn Qeh?e? (ZcII?P,a)Pr ><!1?) '?r}-?;'??c-r`,I?-??
14. Proposed channel work (if any):. -S I Heel m04 C 05S 1 na
15. Recent weather conditions: ?--jA rwnrr 1NfC1-??A.(L2 bfrre- ron<Jfa L?1 t! 1A)) ncu-Z1NKL( -n--)urYffWt
16. Site conditions at time of visit: W I f'i i h nm w l b.m I +_,
17. Identify any special waterway classifications known: -Section 10 -Tidal Waters -Essential Fisheries Habitat
-Trout Waters -Outstanding Resource Waters _ Nutrient Sensitive Waters -Water Supply Watershed (I-IV)
13. Is there a pond or lake located upstream of the evalu 'on point? YES NO If yes, estimate the water surface area:
19. Does channel appear on USGS quad map? ' NO 20. Does channel appear on USDA Soil Survey? (YES
21. Estimated watershed land use: 50% Residential _% Commercial _% Industrial LO % Agricultural
F% Forested _% Cleared / Logged S % Other(. fzl )(,,( ens f .rnr nt)
1
22. Bankfull width: (o 23. Bank height (from bed to top of bank): 3 -,5
24. Channel slope down center of stream: Flat (0 to 2%) -Gentle (2 to 4%) -Moderate (4 to 10%) -Steep (>10%)
25. Channel sinuosity: Straight Occasional bends -Frequent meander -Very sinuous -Braided channel
Instructions for completion of worksheet (located on page 2): Begin by determining the most appropriate ecoregion based on
location, terrain, vegetation, stream classification, etc. Every characteristic must be scored using the same ecoregion. Assign points
to each characteristic within the range shown for the ecoregion. Page 3 provides a brief description of how to review the
characteristics identified in the worksheet. Scores should reflect an overall assessment of the stream reach under evaluation. If a
characteristic cannot be evaluated due to site or weather conditions, enter 0 in the scoring box and provide an explanation in the
comment section. Where there are obvious changes in the character of a stream under review (e.g., the stream flows from a pasture
into a forest), the stream may be divided into smaller reaches that display more continuity, and a separate form used to evaluate each
reach. The total score assigned to a stream reach must range between 0 and 100, with a score of 100 representing a stream of the
highest quality.
Evaluator's Sign
Date

a
USACE AID# DWQ # Site ;SA-:f'(indicate on attached map)
0 ?-
'

0-7?t S TREAM QUALITY ASSESSMENT WORKSHEET ,
rr.
,

Provide the following information for the stream reach under assessment:
1. Applicant's name: C?arjo 2. Evaluator's name: N ra -a9 vs aL-i
3. Date of evaluation: t I I t y J o3 4. Time of evaluation: //: o o AM

?' 9 S Ct-t? k 6. River basin: Xo,?kih
5. Name of stream: V, 45: n y
7. Approximate drainage area: 4 So avY'?e- 5 8. Stream order: ?' f r f
9. Length of reach evaluated: t z ro 10. County: /'YIe G IlA DtCt?
11. Site coordinates (if known): prefer in decimal degrees. 12. Subdivision name (if any): N

Latitude (ex. 34.372312): -J S• 3 (? o U Longitude (ex.-77.55661 l): 90 . 7 (o 0 C,

Method location determined (circle): GPS Top, She Ortho (Aerial) Photo/GIS Other GIS Other
?we.cr
tion): 13 C
a
attach map identifying stream(s) loc
13. Location of reach under evaluation (note nearby roads and landmarks and
Eli .
??
M-1 lij CfCCk ' ! P CoMMMw1 ark SD eA'-r nt.L ?7Gf /' CI1N SeliJ ?..?IN of /'
L/
.,F
J I Al /J
14. Proposed channel work (if any): Q? s r• ??L P• ?e%?i I
15. Recent weather conditions: /V o ra ,'.,% QQ 5'4- '7 a ? dvt rS ? sti oN o14 ,I- t,., i n
16. Site conditions at time of visit: Par+Iy cJo-A, , ^-So F
17. Identify any special waterway classifications known: -Section 10 -Tidal Waters -Essential Fisheries Habitat
-Trout Waters -Outstanding Resource Waters - Nutrient Sensitive Waters -Water Supply Watershed (I-IV)
13. Is there a pond or lake located upstream of the evaluation point? YES ONO If yes, estimate the water surface area:
19. Does channel appear on USGS quad map? YES ONO - 20. Does channel appear on USDA Soil Survey? YES NO
21. Estimated watershed land use: _°% Residential _% Commercial _% Industrial Agricultural
% Forested _% Cleared/ Logged '?O% Other ( ?Gt t- k / -rC?'2 cPs )
22. Bankfull width: - (a 23. Bank height (from bed to top of bank): 1 - 3
24. Channel slope down center of stream: Flat (0 to 2%) -Gentle (2 to 4%) -Moderate (4 to 10%) -Steep (>10%)
25. Channel sinuosity: Straight -Occasional bends ?Frequent meander -Very sinuous -Braided channel
Instructions for completion of worksheet (located on page 2): Begin by determining the most appropriate ecoregion based on
location, terrain, vegetation, stream classification, etc. Every characteristic must be scored using the same ecoregion. Assign points
to each characteristic within the range shown for the ecoregion. Page 3 provides a brief description of how to review the
characteristics identified in the worksheet. Scores should reflect an overall assessment of the stream reach under evaluation. If a
characteristic cannot be evaluated due to site or weather conditions, enter 0 in the scoring box and provide an explanation in the
comment section. Where there are obvious changes in the character of a stream tinder review (e.g., the stream flows from a pasture
into a forest), the stream may be divided into smaller reaches that display more continuity, and a separate form used to evaluate each
reach. The total score assigned to a stream reach must range between 0 and 100, with a score of 100 representing a stream of the
highest quality.
Total Score (from reverse): Comments: Lower Pori-'on o-F S?r?awt 3? IV
W q`?-L ( -f'?1 ra u? q I o l 1 rit, f 'r? /t Gt 1 ?i i S Y L4 1. i S ng,.> rf Jr : n u?.? 1 t-G .• tiP PLf
(J O `' 1 ?a D o\ i7 4- r L,, - k1.1
ow -TYt or i h 1 S2wC/"1.- -
Evaluator's Signature Date //0
3
This channel evaluation form is intended to be only as a guide to assist landowners and environmental professionals in
gathering the data required by the United States Army Corps of Engineers to make a preliminary assessment of stream
quality. The total score resulting from the completion of this form is subject to USACE approval and does not imply a
particular mitigation ratio or requirement. Form subject to change - version 06/03. To Comment, please call 919-876-8441 x 26.
1

STREAM QUALITY ASSESSMENT WORKSHEET
SA--7
DF 2-
E CORE GIONIN 'RANGE
m CHAR
CTERISTICS
A SCORE
- Coastal Piedmont Mountain
1' ( Presence of flow /persistent pools in stream
0-5
0 - 4
0
5
(no flow or saturation = 0; strong flow = max points) - O
2 Evidence of past human alteration
0-6
0-5
0-5
(extensive alteration = 0; no alteration = max points)
3 Riparian zone
0-6
0-4
o- 5 y
(no buffer = 0; contiguous. wide buffer = max points)
4 Evidence of nutrient or chemical discharges
0-5
0-4
- 0-4
(extensive discharges = 0• no discharges = max points) I
1
.7 5 Groundwater discharge
'y
U (no discharge = 0; springs, seeps, wetlands. etc. = max points) 0-3 0-4 0-4

6 Presence of adjacent floodplain
(no floodplain = 0; extensive floodplain = max points) 0-4 0-4 0-2
I
w Entrenchment/ floodplain access 0-5 0- 4 0- 2
(deeply entrenched = 0: frequent flooding = max points)
8 Presence of adjacent wetlands
(no wetlands = 0; large adjacent wetlands = max points) 0-6 0-4 0-2
0
9 Channel sinuosity 0

(extensive channelization = 0. natural meander = max points) 0-5 0-4 -3
10 Sediment input
(extensive deposition= 0; little or no sediment = max points) 0-5 0-4 0-4
l 1 Size & diversity of channel bed substrate

(tine, homogenous = 0; large, diverse sizes = max points) NA* 0-4 0-5
'
1? Evidence of channel incision or widening,
>+ (deeply incised = 0; stable bed & banks = max points) 0 - 5 U - 4 0.- 5

?-? 1 Presence of major bank failures
(severe erosion = 0; no erosion, stable banks = max points) 0- 5 0-5 0-5

7? 14 Root depth and density on banks
-
F-
+ (no visible roots = 0; dense roots throughout = max points) 0
3 0 - 4 0 - 5 I

15 Impact by agriculture, livestock, or timber production

(substantial impact =0; no evidence= max points) 0-5 U-4 0-5
16 Presence of riffle-pool/ripple-pool complexes

(no riffles/ripples or pools = 0. well-developed = max points) 0-3 0-5 0-6

F' 17 Habitat complexity
(little or no habitat= 0; fre
uent
varied habitats = max
i
t
)
0-6
0-6
0-6
q
,
po
n
s

13 Canopy coverage over streantbed
0-5
0-5
0-5

y
(no shading vegetation = 0; continuous canopy = max points)

19 Substrate embeddedness
*
(deeply embedded = 0: loose stricture = max) NA 0-4 0 - 4 3
20 Presence of stream invertebrates (see page 4)

it
(no evidence = 0; common, numerous types max points) 0-4 0-5 0 - 5
O
21 Presence of amphibians

O .
(no evidence = 0: common, numerous types = max points) 0-4 0- 4 0-4 b
Q .2? Presence of fish
(no evidence = 0: conunon, numerous types = max points)
0-4 I
0-4
0-4
0
23 Evidence of wildlife use
0-6
0-5
0-5
0
(no evidence = 0; abundant evidence = max points)
Total Points Possible 100 100 100
TOTAL SCORE (also enter on first page) 3
1113 1aucZ) are not assessea in coastal streams.
0
2

5,4 4
(
Strcaw, ?I?
NCDW_QStream Classification Form '',,
ProjccIName:?AllQtr River Basin:yadk'^ Counry:/e?`"h"? Evaluator. A- ea,ra?01? ar
DWQ Project Number. Nearest Named Stream: S4"° QIk Latitude: -3S*. 3 t; 0 D Signature:?? 21aiLS, s?
Cr
Date: 111i`II03 USGSQUAD: btLongnude: SJtd
r, S-t1.7 60G) LocaciomDirec:ions:
*PLEASE NOTE: if evaluator and landowner agree that the feature is a man-made ditch, then use of this form it not necessary. Par ?r4 ^
Also, if in the best professional judgement of the evaluator, the feature is a man-made ditch and not it modified natural stream-chit ppp
t S .1 p ,y
rating system should not be used* r-u A all
Primary Field Indicators: (Circle One NumberPerLne) S-T --zaP-, 3
CJ I. Geomor holtrw Abs nt Weak Moderate Strnn2
1) Is Ther_ A Riffle-Pnol selucnce? l n Z
uarle- 2) Is The USDA Tcxturc in Stmambcd
sQrv? Different From Surrounding Tcrriin?
Are NaLuml Levecs Prescnt'7 0 l n t
1 Is The Channel Sinuous? l c 3
5) Is There An Active (Or Relic)
PRIMARY GEOMORPHOL OGY INDICA TOR POINTS:
IT. Avdrnltr'v Absent Weak Moderate Strnm,
1) Is There A Groundwater
t-rvwC: !I vca .E 7ant Cur?srd 9V 0ire4rnr;lnd wIT110r/T SIn in, n - Scanr09
1 U) Is A Z"a Order Or Grcatet Channel (As Indicated / 1
e
USACE AID# DWQ # Site #?? 0 (indicate on attached map)
STREAM QUALITY ASSESSMENT WORKSHEET
.4 t
Provide the following information for the stream reach under assessment: `i
1. Applicant's name:C41oxlo e-44e,0,4,u•q Sc?..?ls 2. Evaluator's name: /4cQam ??aragoS;uri
3. Date of evaluation: ' I 1 `d u 4. Time of evaluation: it 2 A w,
5. Name of stream: t j, i • F S -??4 Grete lc 6. River basin:
7. Approximate drainage area: ;Z 0 Q?? e S S. Stream order: r J
9. Length of reach evaluated: afo fet'? 10. County: /Y/,-e- k 4-1 &J-I-
11. Site coordinates (if known): prefer in decimal degrees. 12. Subdivision name (if any):
Latitude (ex. 34.872312): S. G o n Longitude (ex. -77.556611): ED - -7 ?o D Z)
Method location determined (circle): GPS Topo Sh Ortho (Aerial) Photo/GIS Other GIS Other
f
13. Location of reach under evaluation (note nearby roads an d landmarks and attach map identifying stream(s) location): Su A t A
Wl a l l a J Grce k 5« G y +; e IS e +r.?.i rt,„ ,? - w -t t o -F S 7? 12.t w, 3
6' ?
14. Proposed channel work (if any): ?y ss
? Q' Pe '
15. Recent weather conditions: No r a o eN .it; ea-r+ ?, a rs
; S? h N Z t t l /,dy
16. Site conditions at time of visit: PGL,-+{y CL-t )Q : ?
" S o ' F
17. Identify any special waterway classifications known: -Section 10 -Tidal Waters -Essential Fisheries Habitat
-Trout Waters -Outstanding Resource Waters _ Nutrient Sensiti e Waters -Water Supply Watershed (I-IV)
13. Is there a pond or lake located upstream of the evaluation point? YES _Df yes, estimate the water surface area:
19. Does channel appear on USGS quad map? YES N 20. Does channel appear on USDA Soil Survey? YES NO
21. Estimated watershed land use: -',,Io Residential _% Commercial _% Industrial _% Agricultural
t / v % Forested

9 _% Cleared / Logged J% Other ( Pat. ,- L /F1e l )
t
22. Bankfull width: 4 23. Bank height (from bed to top of bank): o2
24. Channel slope down center of stream: V -"Flat (0 to 2%) -Gentle (2 to 4%) -Moderate (4 to 10%) -Steep (>10%)
25. Channel sinuosity: Straight -Occasional bends Frequent meander -Very sinuous -Braided channel
Instructions for completion of worksheet (located on page 2): Begin by determining the most appropriate ecoregion based on
location, terrain, vegetation, stream classification, etc. Every characteristic must be scored using the same ecoregion. Assign points
to each characteristic within the range shown for the ecoregion. Page 3 provides a brief description of how to review the
characteristics identified in the worksheet. Scores should reflect an overall assessment of the stream reach under evaluation. If a
characteristic cannot be evaluated due to site or weather conditions, enter 0 in the scoring box and provide an explanation in the
comment section. Where there are obvious changes in the character of a stream under review (e.g., the stream flows from a pasture
into a forest), the stream may be divided into smaller reaches that display more continuity, and a separate form used to evaluate each
reach. The total score assigned to a stream reach must range between 0 and 100, with a score of 100 representing a stream of the
highest quality.
Total Score (fromreverse): Comments: ti,, z,,., k-r / 1

l
Evaluator's Signature A S? Date
This channel evaluation form is intended to be d only as a guide to assist landowners and environmental professionals in
batherinti the data required by the United States Army Corps of Engineers to make a preliminary assessment of stream
quality. The total score resulting from the completion of this form is subject to USACE approval and does not imply a
particular mitigation ratio or requirement. Form subject to change - version 06/03. To Coaunent, please call 919-876-8441 x 26.
1
u

0 STREAM QUALITY ASSESSMENT WORKSHEET
S/a
u
CHARACTERISTICS ECOREGIOf IN1
e-Q 'RANGE
tr SCORE
Coastal 'iedntont Mountain

1 Presence of flow / persistent pools in stream
0-5
0-4
0-5
(no flow or saturation = 0; strong flow = max points)
2 Evidence of past human alteration o-6 0-5 0-5
(extensive alteration = 0: no alteration = max points)

3 Riparian zone
0=6
0-4
0-5 !
(no buffer = 0: contiguous, wide buffer = max points)
Evidence of nutrient or chemical discharbes
-
.
(extensive discharges = 0; no discharges = max points) _ 0
5 0-4 0-4
.a Groundwater dischartie
U o no discharge = 0: springs. seeps, wetlands, etc. = max points) 0 - 3 0 - } 0 - 4

v
6 Presence of adjacent tloodplain
?
no tloodplain = 0; extensive flood lain = max points) 0-4 0-4 0-2
I
Entrenchment / floodplain access

(deeply entrenched = 0: frequent flooding = max points)
0 - 5
0 - 4
0 - 2 y
I
Presence of adjacent wetlands 0-6 0-4 -0-2
(no wetlands = 0: large adjacent wetlands = max points)
9 Channel sinuosity 0-5 0-A 0-3
(extensive channelization = 0; natural meander= max points) 3
10 Sediment input
(extensive deposition= 0; little or no sediment = max points)
0-5
0 -4
0-4
3
Size & diversity of channel bed substrate
11
(tine, homogenous = 0, large, diverse sizes = Max Points) Nk 0-4 0-5
I
1? Evidence of channel incision or widening
0 - 5

U - 4
7

0
5
(deeply incised = 0; stable bed &- banks = max points) -
r
13 Presence of major bank failures

0-5

0 - 5

0-5
(severe erosion = 0: no erosion, stable banks = max points) 3

14 Root depth and density on banks
0-3
0 - 4
0- 5
(no visible roots = 0; dense roots throughout = max points) Y

15 Impact by agriculture, livestock, or timber production
0-5
-0-4
0-5
(substantial impact =0: no evidence = max. points)
16 Presence of riffle-pool/ripple-pool complexes
(no riffles/ripples or pools = 0: well-developed = max points) 0-3 U - 5 ` 0-6
Q
F" 17 Habitat complexity
(little or no habitat = 0; frequent, varied habitats = max points) 0-6 0-6 0-6
C7
Is Canopy coverage over streambed

0 - 5

0 - 5

0 - 5
., (no shading vegetation = 0: continuous canopy = max points)
19 ` Substrate embeddeduess NA* 7 -0 0-4
(deeply embedded = 0; loose stricture = max)
20 Presence of stream invertebrates (see page 4)
(no evidence= 0. common, numerous pes = max points) 0-4 0- 0-5

O 21 ° Presence of amphibians
=
c
0-4
0-4 i
0-4
(no evidence
0:
ommon, numerous types = max points) -

O
22. Presence of fish
0-4
0-4
0-4
(no evidence = 0: conunon, numerous types = max points)
r23 Evidence of wildlife use U
(no evidence = 0, abundant evidence = max points) 0- 6 0- 5 0- 5
Total Points Possible 100 100 100
TOTAL SCORE (also enter on first page)
3q
nose cnaractertsncs are not assessea in coastal streams.
0

e
0
OF
e
a
a
a
a
0
e
a
0
s
0
e
a
0
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
F-/0 ?5 A I -thr?l A?7
blue?whi )e
Project / Site: Mallard Creels Hieh School Date: 25 0 3
Applicant/ Owner: Charlotte-iviecklenbura Schools County: Nfeeklenburg
Investigator: Michael ia!!noeeo, PWS; Jennifer Schwaller State: NC
Do normal circumstances exist on the site? Yes _/ No Community ID:
Is the site significantly disturbed (Atypical situation)? Yes No Transect ID:
Is the area a potential problem area? Yes No Plot ID: 7P-
(explain on reverse if needed) ((eVand A b) Flog A -yq
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1. -rL)nh(,,, to 6)6'c' 06L_ 9.
2. h (?QY1r?. YZ? T11C-0&- 10.
3.700n03 (Arr)omu(yl 11.
4.._ cI1 ey,IS Pr?/4hrnrhiZm Obl_ 12.
5. )!J*XiIN-U j2,nn-r IyGnlro, (=ACI-J 13.
6. ACw r1,lhYfcn T FAG 14.
7., iUnrctc P(,r!truS H P7ACU) 15.
a. Co(ex CornofG 066, 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). = 0.
Remarks:
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
Stream, Lake, or Tide Gauge
_ Aerial Photographs Primary Indicators:
Other Inundated -opfnWo l
Saturated in Upper 12"
No Recorded Data Available Water Marks
Drift Lines
Field Observations: Sediment Deposits
Drainage Patterns in Wetlands
Depth of Surface Water: n(in.) Secondary Indicators:

" Oxidized Roots Channels in Upper 12"
Depth to Free Water in Pit:
in.) _ Water-Stained Leaves

Depth to Saturated Soil: 3)l+r?o& (in.) _ Local Soil Survey Data
FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks:
a?' a n ?'I???nU p tJp??
a
0
e
e
0
a
0
s
a
e
0
0
0
0
W-e a vi cf A- - -? ? - ?
Pq 2 oC 2
SOILS
Map Unit Name
(Series and Phase):W If E loam,
?3 +0 1,51- `100P.S Drainage Class: Oe 1 df_io,-C1
Taxo om (Subgroup): OQm??,rnlx?
? d, `??LPJLrYIiC'., Confirm Mapped Type? Yes_ No
o(J TuDi? r?D.Var /ll S
S in I (Me(1 q-e17 .» co. Sol (SCtrvr.cal
Profile Description:' j
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
- I_ ??i C r 4e;1 j C O
-7 I2 A of f? 5 f f I i? Q?junr?(1r1)f (?iSh'r?C f 5?^ir?'?t1 f fC? c_,
Hydric Soil Indicators:
_ Histosol _Concretions
_ Histic Epipedon _ High Organic Content in Surface Layer in Sandy Soils
_Sulfidic Odor Organic Streaking in Sandy Soils
_ Aquic Moisture Regime Listed On Local Hydric Soils List
_ Reducing Conditions Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors _ Other (Explain in Remarks)
R
marks:
e
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes No Is the Sampling Point
Wetland Hydrology Present? Yes ? No Within a Wetland? Yes2 No
Hydric Soils Present? Yes v.-' No
Remarks:
?P? I is ?(?`tf%? ?n a u; ?-fwr),? d wa!-2.t a? on rJt?11?neoC -
?vt,ot,( i ? ' O 6 ? o Y1 V? Q? pv.?- t of 1 ? S ?'f Eu-e'}` 2.rG' J GD'h? i? 1-1 QM P?-? V C??a-?c
S(T)6-S.I rJ? v,eHat,-? o UJLtr?,I

a
a
u
??
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
s CI-CZq
b)UeJWhi1t
Project / Site: Ntallard Creek High School Date:
Applicant / Owner: Charlotte-Mecklenburg Schools County: Mecklenburg
Investigator: Michael Tagnoeco, PWS; Jennifer Schwaller State: NC
Do normal circumstances exist on the site? Yes ? No Community ID:
Is the site significantly disturbed (Atypical situation)? Yes No= Transect ID:
Is the area a potential problem area? Yes No ? Plot ID: DP- S
(explain on reverse if needed) Pt?QYI? (?
ol
f
o
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
0-0 00- FA C (.L 9. Ccc ?-< X 5 y FA C -o 6L
2. n') Of n c VI rrA)t) CW FACu - 10.ZfAm s•:s rQeQ;cctns W V ??
3. Ue (c C I F1C?_ 11.6 ;s ?, s ra tea.., I FACE
4. n (0 o- f=FlG 12.
5. (ay- Q1' ACA 13.
L 14.
7. [ter. ?2r4 or: C-a FA C-- 15.
16
.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). / SID
Remarks: I y n Q ?? ?, J
"^
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
_ Stream, Lake, or Tide Gauge
Aerial Photographs Primary Indicators:
_ Other Inundated
Saturated in Upper 12"
X No Recorded Data Available _ Water Marks
_ Drift Lines
Field Observations: _ Sediment Deposits
Drainage Patterns in Wetlands
J 1A
Depth of Surface Water:
(in.) Secondary Indicators:
'v0-1,2?
Depth to Free Water in Pit: preaeA-?- (in.) Oxidized Roots Channels in Upper 12"
Water-Stained Leaves (W-eCLIL)

3 _ Local Soil Survey Data
Depth to Saturated Soil:
(in.) _ FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks: 25"j?
err?Ckl rC(i nl) j^
?
L
- S J l S S^ I i.l f u ( r 1 1 ?1 r- O Y- V -? W t
Q ?1 ?\
- p , ems; kyd,-D I T albs Pcre4r
H]i
0
III
0
we-wand C --bP 5
-Pq 2 oP 2
SOILS
Map Unit Name
(Series and Phase): Drainage Class: L- J
1'4-;c-
Taxonomy (Subgroup): +kerte, c T.'gaPI a' 45 Confir?Mapped Type? Yes_ No
Vt'1 ,- k. P_ N 4-,., r a r 7,A 1 +7 s u i S,j rv 2 V /
Profile Description: J
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
P--0 O I'D 1Z 0r9a at 'c-
??1 Z-t -L- ?, S ? ? 'L 10 `l 2 S ? r«a., ra ??t:n ??' SQ?t;?Y ??"'?
Hydric Soil Indicators:
_ Histosol _ Concretions
_ Histic Epipedon _ High Organic Content in Surface Layer in Sandy Soils
_ Sulfidic Odor Organic Streaking in Sandy Soils
_ Aquic Moisture Regime Listed On Local Hydric Soils List
Reducing Conditions Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors _ Other (Explain in Remarks)
Remarks:
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes No Is the Sampling Point
Wetland Hydrology Present? Yes 4- No Within a Wetland? Yes X No
Hydric Soils Present? Yes No
Remarks: ? tJC i?t't-tf ?
nQ.-+?d as 410rc cs d?
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DF -a13
DATA FORM r?
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
Project / Site: Mallard Creek High Sehool lI d 3
Date:-//
Applicant / Owner: Charlotte-' fecklenbur2 Schools ,
County: NfecklenhurQ
Investigator: Adam Karaf_,osian-, PP)S State: NC
Do normal circumstances exist on the site? Yes V No Community ID:
Is the site significantly disturbed (Atypical situation)? Yes_ No t.- TransectID:
Is the area a potential problem area? Yes No ? Plot ID: t"---, P-!q
(explain on reverse if needed)
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1.FraX;,1AS Pe,0r1S? J'JA,,; c.a 1-4 FAGVJ '
AGI ?JR
9. L; .-do bA, S
r
2.Loh:cera IaFoni uA 14 FAG- /
'
-
1o.! ywi ag YOf?lh I rv1 ?Q w7
3. CLL :^tAS ?q rol riovuti S S :EA L 11.
4. _ Ce,?-'51 S /5 /A Gln) 12.
5. Gt ; r 4 e-V,' c+fR -T :(:?AC-W 13.
6._C-J-r i-,a.vn ! FA (- 14.
7. y4-Nu,S rLAbyox- 5 -rAC 15.
8. Li?uS4-r-,A H, 5; 2IKSZ S/S -7A C? 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). /10 ^ 90%
Remarks:
?? ?,, Q V`14"L
VtJ D'v'% C-G Vh. Y`QV%?-
HYDROLOGY
_ Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
_ Stream, Lake, or Tide Gauge
_ Aerial Photographs Primary Indicators:
_ Other _ Inundated

N
R
d
d D ZG Saturated in Upper 12"
Water Marks
o
ecor
e
ata Available _
_ Drift Lines

Field Observations: _ Sediment Deposits
Drainage Patterns in Wetlands
Depth of Surface Water: (in) Secondary Indicators:

Depth to Free Water in Pit: 1'1 in.)
WA Oxidized Roots Channels in Upper 12"
Water-Stained Leaves
Depth to Saturated Soil: (in.) Local
FAC-Neutral Survey Test Data
_ Other (Explain in Remarks)
Remarks: p 1
w 7-4- T e a v?n C kA t1 n1L. l
Loe K aK,dl ky r o l o 3 7 t d 1.4 o-kqr re4---n L

b P- 13
SOILS
Map Unit Name // '' ??CeS /Oao
W'
/0
fl?eS
r
f I
(Series and Phase): Drainage Class:
e

Taxonomy (Subgroup): ow j C. Confirm Mapped Types Yes No
u 4 W1e r ,,?q ?a. -5-o,'1 SLtrv?
Profile Description:
Depth Matrix Colors Mottle Colors Mottle Texture, Conc retions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure etc.
D- 3 Ai 1 o v 2 S /i A Sa,
3-? Q , V ' C- y s-/4 7E- (Z C-o n'7 r+7U n c le fo a k
.

0 ' I Zi- 1?2 S? Y S-s2-
. S 6o,,no,./ iSfnc% C.(Q t? ,
,
/OCEf v1
Hydric Soil Indicators:
Histosol _ Concretions
_ Histic Epipedon _ High Organic Content in Surface Layer in Sandy Soils
_ Sulfidic Odor Organic Streaking in Sandy Soils
_ Aquic Moisture Regime Listed On Local Hydric Soils List
-Reducing Conditions Listed on National Hydric Soils List
-Gleyed or Low-Chroma Colors -Other (Explain in Remarks)
Remarks:
A - ko?, zor. ?4 ?.r,
c.I?LA v; N (a yv- r
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes X No Is the Sampling Point
Wetland Hydrology Present? Yes X No Within a Wetland? Yes X No
Hydric Soils Present? Yes X- No
Remarks:
0

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ull

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Hh,
Attachment E
Wetland Rating Worksheets

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n n / / LcJ e. 44a !X
Project Name a Hard C, 14 S' Nearest Road Jg/H
County'/ e c Q n. , a r- S - Wetland Area ":0-'5'60-'- acres Wetland Width feet
Name of evaluator /-? da?. ??ara q ?S a„ Date /o 73 3
Wetland Location
on pond or lake
- on perennial stream
on intermittent stream
within inter stream divide
_ other
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral - non-sandy
predominantly sandy
Hydraulic factors
_ steep topography
ditched or channelized
_ total we:Iand width z 100 feet
Adjacent land use
(within 112 mile upstream, up-lope, or radius)
forested/natural vegetarian -7 0 %
agriculture, urban/suburban 25'?_ %
impervious surface S %
Dominant vegetation
(2) ?c r v J cP.
(?) SGZ I ? ? ra
Flooding and wetness
semipermanently to permanently
flooded or inundated
seasonally flooded or inundated
intermittanly flooded or temporary
surface water
no evidence of flooding or surface water
.R Water storage x 4.00 =
? Wetland

A Rating
Bank/Shoreline stabilization x 4.00 =
Pollutant removal * x 5.00 =
I Wildlife habitat x 2.00 =
N
Aquatic life value x _
4.00
G Recreation/Education 2 x 1.00 = -?
C;21?
*Add 1 point if in sensitive watershed and >10% nonpoint disturbance within 112 mile upstream,
upslooe, or radius
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest ,- Freshwater marsh P61 ',P Swamp forest Bog/fen
Wet Eat Ephemeral wetland
Pocosin Carolina Bay
Bog forest - Other
*the ratine system cannot be applied to salt or brackish marshes or stream charnels
weight
C"'.
L
4
i
Ism
?d
Wetland Location
_ on pond or lake
on perennial stream
_ on intermittent stream
_ within interstream divide
A other a + w, A, - An A A0R- P 011 `Q
aLtl.L--
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral - non-sandy
_ predominantly sandy
Hydraulic factors
steep topography
ditched or channelized
_ total wetland width z 100 feet
Adjacent land. use
(within 1/2 mile upstream, upzlope, or radius)
forested/natural vegetarian -7 ° %
agriculture, urban/suburban ;?r %
impervious surface %
Dominant vegetation
(1) L;9U1'41Mbar sf?raC,;PIa
(3) L? g US+?Kyn S,nenSP.
Flooding and wetness
semipermanently to permanently
flooded or inundated
seasonally flooded or i=dated
X intermittanly flooded or temporary
surface water
no evidence of floodinz or surface water
R Water storage x 4.00 = y
f1 Bank/Shoreline stabilization Q x 4.00 =
T Pollutant removal * x 5.00 = S,?
I Wildlife habitat x 2.00 = c;2,
N Aquatic life value °L x 4.00 =
G Recreation/Education x 1.00 =
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh
Swamp forest Bog/fen
Wet flat Ephemeral wetland
Pocosin Carolina Bay
Bog forest - Other
*the rating system cannot be applied to salt or brackish marshes or stream channels
weight
Wetland
Rating
*Add 1 point if in sensitive watershed and >10% nonpcint disturbance within 1/2 mile upstream,
uoslooe, or radius

J
1 17
4
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Project Name ???1Q("cQ Lr?C •S • Nearest Road ?ln??S4-eh-(?t1,?er
County CAOICQUAb ar Wetland Area ± S a ??? f acres Wetland Width ' 5-00 feet
Name of evaluator a?.+ti Kar °`4 ys °''^ Date a 3 03
Wetland Location
- on pond or lake
on perennial stream
_ on intermittent stream
_ within interstream divide
Y other s of a?-e A de ??ess o..
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral - non-sandy
- predominantly sandy
Hydraulic factors
_ steep topography
ditched or channelized
total wetland width a 100 feet
Adjacent land use
(within 1/2 mile upstream, E:? , or radius)
forested/natural vegetation 10 %
agriculture, urban/suburban'E %
impervious surface S %
Dominant vegetation
(1) - ???erc.us the Il?f
J
(?) Li trw s v ? r q io '4 na
va +4
Flooding and wetness
semipermanently to permanently
flooded or inundated
seasonally flooded or inundated
intermittanly flooded or temporary
surface water
no evidence of flooding or surface water
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh
Swamp forest Bo&fen Ma ? C.
Wet flat Ephemeral wetland (-{
Pocosin Carolina Bay
Bog forest - Other
*the rating system cannot be applied to salt or brackish marshes or stream channels
le ?reSS il o r
el weight
R Water storage x 4.00 = 1 Wetland
A Bank/Shoreline stabilization ? x 4.00 =
O
Rating
T Pollutant removal 1

2 * x 5.00 =
42
1 I Wildlife habitat x 2.00
'
a N Aquatic life value x 4.00 =
G i
R
/Ed 00 =
1 2
ucat
on
ecreation x
.
F-I It Til -------
_.
*Add I point if in sensitive watershed and >10% nonpoint disturbance within 1/2 mile upstream,
upslooe, or radius

?GLr S o -? W e.-I-'ta4 Al a•? • .
Project Narne 'r',11 C', l 1n r? Nearest Road Joel h S'It-o h -(5 4/e,- IZP.
County MRC-? Aeh?-k -0- Wetland Area ± ° r o ate- acres Wetland Width /- '4 O f?°_t
Name of evaluator Adaw+ Date n/? m
Wetland Location
of
rri:
d
on pond or lake
on perennial stream
on intermittent stream
- within interstream divide
other
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral : non-sandy
predominantly sandy
Hydraulic factors
steep topography
ditched or channelized
total wetland width z 100 feet
Adjacent land use
(within 1/2 mile upstream, up-lope, or radius)
forested/natural vegetation Z %
agriculture, urban/ sub 'an o2 %
impervious surface %
Dominant vegetation
(1) ACA- r ra ? r,A ,M
(2) /o, Lt S r LA 6 rG
Flooding and wetness
semipermanently to permanently
flooded or inundated
seasonally flooded or inundated
>f intermittanly flooded or temporary
surface water
no evidence of flooding or surface water
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh
Swamp forest Bog/fen
Wet flat Ephemeral wetland
Pocosin Carolina Bay
Bog forest - Other
*the rating system cannot be applied to salt or brackish marshes or stream channels
w6ght
R Water storage x 4.00 Wetland

f1
Bank/Shoreline stabilization ?
x 4.00 = Rating
Z' Pollutant removal * x 5.00
I Wildlife habitat x 2.00
N Aquatic life value 2 x 4.00 = O
G i 0
=
on
Recreation/Educat x 1.
0
*Add 1 point if in sensitive watershed and >10% nonpoint disturbance within 1/2 mile upstream,
unslooe, or radius
i
h.
ITA i t ? ? tau '
C,J e + l a r, c4 F; ;71,a.% ,R F xrt; o
h ctnd
Project Name 14 A 1)0,rd L o-ec' Nearest Road J04n14-6a - 09Ote Id.
County ?''???k-le?bu r Wetland Area t 0- 5-0 acres Wetland Width ` 8 feet
Name of evaluator a Kara4 ?s 1a.,? Date /v o3
Wetland Location
_ on pond or lake
on perennial stream
Oon intermittent stream
within interstream divide
other
Soil series
predominantly organic - humus, muck,
or peat
k predominantly mineral =non-sandy
predominantly sandy
Flooding and wetness
Hydraulic factors
steep topography
ditched or channelized
total wetland width z 100 feet
Adjacent land use
(within 1/2 mile upstream, up-lope, o radius
forested/natural vegetation '7 0 %
apiculture, urban/suburban d2s %
impervious surface 5- %
Dominant vegetation
(1) ),4/, e ?A r (' 1 ?.t r
(2) J14,1 ( A f " , 0All r 's

semipermanently to permanently
flooded or inundated
seasonally flooded or it=dated
intermittanly flooded or temporary
surface water
no evidence of flooding or surface water
R Water storage _ x 4.00 = !- Wetland
Rating
A Bank/Shoreline stabilization x 4.00 = ,
T Pollutant removal +
* x 5.00 =
I Wildlife habitat x 2.00 = 4 -
N Aquatic life value °Z x 4.00 =
r
G Recreation/Education x 1.00 =
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh ; - ?•+?? IIe,7
Swamp forest Bo&fen /Z/w•
Wet flat Ephemeral wetland
Pocosin Carolina Bay
Bog forest - Other
*the rating system cannot be aped to salt or brackish marshes or stream chapels
weight
*Add 1 point if in sensitive watershed and >10% nonpcint disturbance within 1/2 mile upstream,
?__ upslooe, or radius
----- - - --- - - - ----- - ------------
ft
b<
? j
1D G;
w E'r'LaN ? W _
S. NearestRoadJo?-s?o^ -Oehler R?.
Project Name Q??Qrd Crcek P.
County Me.C_1(1L0 ??g -- wetland Area '".nacre- acres Wetland Width -`' YO fert
Name of evaluator A a0,s.- I?a -ag 4 :ar Date I o 23 a
Wetland Location
_ on pond or lake
on perennial stream
_ on intermittent stream
_ within interstream divide
,K other
?4 ,..as-two
nom-1LAr?T 1;`.}-:tom a
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral - non-sandy
predominantly sandy
Hydraulic factors
steep topography
ditched or channelized
total wetland width ;-,100 feet
Adjacent land use
(within 1/2 mile upstre up-1op , or radius)
X forested/natural vegetarian I o %
X agriculture, urban/suburban 2 f %
impervious surface r %
Dominant vegetation
(2) J?4^ (-LAS 2
(3)?9?mLAS R?p??as
Flooding and wetness
semipermanently to permanently
flooded or inundated
seasonally flooded or inundated
intermittanly flooded or temporary
surface water
no evidence of floodinz or surface water
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh
Swamp forest Bog/fen
Wet flat Ephemeral wetland
Pocosin Carolina Bay
Bog forest - Other
*the rating system cannot be aped to salt or brackish marshes or stream channels
v weight ----- -?--
I R 1
-
Water storage / x 4
00 = Wetland

1 A .
Bank/Shoreline stabilization d x 4.00 =
? Rating
T Pollutant removal * x 5.00 = Q
I
Wildlife habitat x 2.00
N Aquatic life value -2 x 4.00 =
i
00 =
d
1
1 ucat
on x
.
Recreation/E
*Add 1 point if in sensitive watershed and >10% nonpoint disturbance within 1/2 mile upstream,
upslope, or radius

}
1
? 61
K?

L.??r'la?? Z
Project Name Q'l Q,?? ?e-e-k 1- . 5• Nearest Road J')?I?
County e c k `h?? Wetland Area C0•SQ?-t- acres Wetland Width feet
Name of evaluator , Qra?os i ak- Date -3 03
Wetland Location
- on pond or lake
on perennial stream
_ on intermittent stream
_ within interstre divide
X other I S-01 A
Soil series
predominantly organic - humus, muck,
or peat
predominantly mineral - non-sandy
predominantly sandy
Hydraulic factors
steep topography
ditched or channelized
total wetland width Z 100 feet
R
A
T
I
N
G
*the rating system cannot be applied to salt or brackish marshes or stream chapels
Swamp torest ? Pg
Wet flat Ephemeral wetland M A
Pocosin Carolina Bay
Bog forest - Other
Wetland type (select one)*
Bottomland hardwood forest Pine savanna -
Headwater forest Freshwater marsh
B
f/ en PrP?S ?a??
weight
Water storage 0 x 4.00 =
Bank/Shoreline stabilization j x 4.00 =
Pollutant removal *-Y 5 nn =

Wildlife habitat
Adjacent land use
(within 1/2 mile upstream, upilope, or radius)
forested/natural vegetation ?2 O %
agriculture, urban/suburban 35?_ %
impervious surface _X. %
Dominant vegetation
(1) J.,,„??,s ?_g_gIAJQf
Flooding and wetness
semipermanently to permanently
flooded or inundated
->? seasonally flooded or immdated
intermittanly flooded or temporary
surface water
no evidence of flooding or surface water

Aquatic life value -?
Recreation/Education
x 2.00 =
x 4.00 =
x 1.00 =
0
v
z
0?.f
Wetland
*Add 1 point if in sensitive watershed and >10% nonpoint disturbance within 1/2 mile upstream,
u?siooe, or radius --------- ------- --------- ---- -------- -------------
S
r
:
i
t

'Project ll?-?V? ?`?22? \L l^1 . S ??/G?I ? IC J ?l? /1 ?-p "?'?h ISLE
Name Nearest Road _ S
County Wetland Area ° Z? acres Wetland Width 'Z feet
Name of evaluator Date ' 16 `a
Wetland Location
on pond or lake
on perennial stream
on intermittent stream
_ within interstream divide
other
Soil series
predom nntly organic - humus, muck,
or peat
predominantly mineral _ non-sandy
predominantly sandy
Adjacent land use
(within 1/2 mile upstream, up-lope, or radius)
forested/natural vegetation %
agriculture, urban/suburban %
X impervious surface %
Dominant vegetation
(2) IL?rP nom! ??•??•'arA
L 5 LA )Ah bog r S -{ yraC-,' 4 /ka
Flooding and wetness
Hydraulic factors
steep:.tq,po_Q -y-
e; -?
ditched or channelized
total wetland width 2100 feet
semipermanently to permanently
flooded or inu:?da?ed.-;.
seasonally flooded or inundated
intermittanly flooded or temporary
surface water
no evidence of flooding or surface water
Wetland type (select one)*
Bottomland hardwood forest Pine savanna
Headwater forest Freshwater marsh
° Swamp forest Bo fen
Wet flat Ephemeral wetland
1 Pocosin Carolina Bay
Bog forest - Other
7______*the ratina_system cannot be applied to salt or brackish marshes or stream chapels

R
Water storage I weight
x 4.00 =
F77
Wetland

3 Rating
A Ban1:/Shoreline stabilization x 4.00 = /

T
Pollutant removal -
* x 5.00 = 17-7
)
I Wildlife habitat x 2.00 =
1V Aquatic Life value x 4.00 =
G i 0
= -
* on
Recreation/Educat 0
x 1.
Add 1 point if in sensitive watershed and >10% non ppint disturbance within 1/2 mile upstre
unslo ce, or radius
11

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Attachment F
Correspondence from Ecosystem Enhancement Program
7
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PROGRAM
July 26, 2004
Adam H. Karagosian, PWS
Ralph Whitehead Associates, Inc.
1000 W. Morehead Street, Suite 200
Charlotte, NC 28208
Subject: Project: Mallard Creek High School
County: Mecklenburg
The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NCEEP) is willing to
accept payment for stream and wetlands impacts associated with the subject project. Please note that the decision by the
NCEEP to accept the mitigation requirements of'this project does not assure that this payment will be approved by the
U.S. Army Corps of Engineers and the N.C. Division of Water Quality Wetlands/401 Unit. It is the responsibility of the
applicant to contact these agencies to determine if payment to the NCEEP for impacts associated with this project is
appropriate.
I
This acceptance is valid for six-months from the date of this letter. If we have not received a copy of the issued 404
Permit/401 Certification within this time frame, this acceptance will expire.
Based on the information supplied by you in a letter dated July 2, 2004, the stream, wetlands and buffer restoration that is
necessary to satisfy the compensatory mitigation requirements for this project is summarized in the following table. The
maximum amount of mitigation that the NCEEP will nrrPnt fnr thic nrn;Prt ;c 91cn

Stream --- -
Wetlands Riparian
Wetlands Non- u 111 1111) 1LLV16..
Riparian Buffer
linear feet) (acres) Riparian (acres) (s q. ft.)
Impact 554 1.249 0.26
Mitization Max 1103 2.498 0.52
TL_ 1
l1C stream anu wetlands rrutrgatron will be provided as specified in the 401 Water Quality Certification and/or Section
404 Permit for impacts associated with the subject project in Cataloging Unit 03040105 of the Yadkin River Basin. The
mitigation will be performed in accordance with the iVlemorandum of Understanding between the N.C. Department of
Environment and Natural Resources and the U.S. Army Corps of Engineers dated November 4, 1993.
If you have any questions or need additional information, please contact Carol Shaw at [phone].
Sin erely,
0
Deborah D. Anderson,
In-Lieu-Fee Administrator
cc: Cyndi Karoly, Wetlands/401 Unit
Amanda Jones, USACOE-Asheville
Allen Johnson, DWQ Regional Office-Mooresville
File
R P.StOf?l,GL9... F ... PYD-EGt7, atr State'
???
NCDENR
North Carolina Ecosystem Enhancement Program, 1619 Mail Service Center, Raleigh, NC 27699-1619 / 919-733-5208 / www.nceep.net

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Attachment G
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E

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Correspondence to
U.S. Fish and Wildlife Service
P_-__
RALPH WHITEHEAD ASSOCIATES, INC.
r Consulting Engineers
Charlotte Atlanta Jacksonville Richmond Kansas City
+ Rock Hill Pittsburgh , Charleston Tallahassee Raleigh
J;
a September 25, 2003
Website:.
www.rwhitehead.com CERTIFIED MAIL
.1 COQ W.Morehmd,Sui1e200 RETURN RECEIPT REQUESTED .
Charlotte, NC 28208
Mailing Address:
Post onIcaBox35824 U.S. Fish and Wildlife Service
Charlotte, NC 28235
Asheville Field Office -
[phone] VOICE 160 Zillicoa Street
[phone] FAX
Asheville, NC 28801
Attention: Mr. Mark Cantrell
Subject: Mallard Creek High School
Mecklenburg County; North Carolina
Q Dear Mr. Cantrell: _
Charlotte-Mecklenburg Schools (CMS) has retained the firm of Ralph Whitehead
Associates, Inc., Charlotte, North Carolina, to conduct environmental review and
Section 404 wetlands permitting services for the proposed development of a
public high school. As an integral part of this study, we.. are soliciting input from
agencies and individuals concerning the potential impacts this project may have
O on the social, economic, cultural, physical or biological conditions in the area.
The proposed project site encompasses approximately 52 acres and is located in.
northeast Mecklenburg County on Johnston-Oehler Road, contiguous • with
Mallard Creek Community Park (Figure 1). According to aerial photography
viewed on the Mecklenburg County Land Records Information System, the
proposed project site is predominantly wooded and houses a former greenhouse,
shed, and storage areas, which are located within an open area. The project site
also encompasses an approximate 0.8-acre pond and approximately 1,450 linear
feet of stream channel that transects the south/southwestern portion of the
project site. The stream channels include the perennial upper reaches of Stony
Creek and an unnamed tributary, of Stony Creek. It is our understanding that a
Natural Heritage site, an upland depression swamp forest locally referred to as
Bingham Swamp, is located on the northeast section of the property. Based on
preliminary conceptual layouts, this site will not be directly impacted by the
proposed project.
CMS has determined a pressing need to locate a high school in this portion of
Mecklenburg County. CMS High School sites are typically'greater than 60 acres
in size in order to accommodate all elements, e.g., athletic fields, faculty and
student parking, etc., of a high school campus. We are currently in the process
of evaluating the potential environmental impacts associated with the
development of this project. This letter constitutes solicitation for scoping
comments related to the proposed project. In order that we may fully evaluate the
impacts of the proposed project, it is requested that you respond in writing
a?
Mr. Mark Cantrell
September 25, 2003
Page 2
concerning any beneficial or adverse impacts of the proposed project relating to the interest of
your agency. For the study effort to stay on schedule and for your input to be included, please
respond by October, 31, 2003.
Please direct your comments to:
Mr. Michael A. lagnocco, P.W.S., Project Manager
Ralph Whitehead Associates, Inc.
P.O. Box. 35624
Charlotte, North Carolina 282351f you have any questions or need additional information
concerning this project, please contact either of the undersigned at [phone].
Sincerely,
RALPH WHITEHEAD ASSOCIATES, INC.
nnifer L. Schwaller Michael A. lagn cc , P.W.S..
Environmental Scientist Project Manage Senior Scientist
JLS/MAI:jls
Attachment
cc: Mr. Mike Higgins, CMS
File

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Attachment H
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Correspondence from
North Carolina Natural Heritage Program

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North Carolina Department of Environment and Natural Resources
Michael F. Easley, Governor William G. Ross Jr., Secretary
October 20, 2003
0
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Mr. Michael A. Iagnocco, P.W.S., Project Manager
Ralph Whitehead Associated, Inc
P.O.. Box 35624
Charlotte, North Carolina 28235
SUBJECT: Rare Species, High Quality Natural Communities, and Significant
Natural Heritage Areas Near the Mallard Creek High School,
Mecklenburg County, NC.
Dear Mr. Iagnocco:
The North Carolina Natural Heritage Program (NC. NHP) does have records for rare species, high
quality natural communities, or significant natural heritage areas (SNHAs ) near Mallard Creek High
School, Mecklenburg
County, NC. As noted in your information request letter, the Bingham Road
T .0
Hard Pan forest SNHA is located adjacent to the proposed Mallard Creek High School project area.
Since your project area does not overlap onto the SNHA, impacts to the site are not anticipated.
I would like to note for your reference that the location of the Natural Heritage Site as shown on the
map enclosed with your letter is not correct. I have enclosed a map showing the correct location of
the Bingham Road Hardpan Forest SNHA.
You may. wish to check the NC NHP web page at http://www.ncsnarks.net/nho/search.html for a
listing of rare plants and animals and significant natural communities in the county and-on the
topographic quad maps. The use of Natural Heritage Program data should not be substituted for
actual field surveys, particularly if the project area contains suitable habitat for rare species,
significant natural communities, or priority natural areas.
Please contact me at 919/715-8695 if you have questions or need more information.
Sincerely,
Jane L. Amoroso
for Harry E. Legrand, Zoologist
Natural Heritage Program
/JLA
.1601 Mail Service Center, Raleigh, North Carolina 27699-1601
Phone: [phone] FAX: [phone] Internet: www.enr.state.nc.us/ENR
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FICDENR
North Carolina Department of Environment and Natural Resources
Michael F. Easley, Governor
October 28, 2003
Ms Jennifer L. Schwaller
Ralph Whitehead Associates, Inc
P.O. Box 35624
Charlotte, North Carolina 28235
William G. Ross Jr., Secretary
SUBJECT: Bingham Road Hard Pan Forest Significant Natural Heritage Area
Near the Mallard Creek High School, Mecklenburg County, NC.
Dear Ms Schwaller:
The Bingham Road Hard pan Forest Significant Natural Heritage Area was first surveyed by the
North Carolina Natural Heritage Program in 1992 and contains a significant example of xeric har
pan forest and upland depression swamp forest. The boundaries are drawn to encompass the natur
community and encompass about 10 acres. According to NC NHP records, part of the site is ow
and managed by Mecklenburg County Parks and Recreation while the rest is privately owned. I
have enclosed a portion of the Mecklenburg County natural areas inventory with a description of
rare natural communities. Portions of the Inventory of the. Xatural Areas of Mecklenburg Count
North Carolina are available at the Mecklenburg County web page:
http://wwrv. come cklenburg.nc.us/.
Please contact me at 919/715-8695 if you have questions or need more information.
d
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Sincerely, r,
trine L. Amoroso
for Harry E. Legrand, Zoologist
Natural Heritage Program
/JLA
eV-e-
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1601 Mail Service Center, Raleigh, North Carolina 27699-1601
Phone: [phone] FAX: [phone] Internet: www.enr.state.nc.us/ENR
An Equal Opportunity 1 Affirmative Action Employer - 50% Recycled 110°'a Post Consumer Paper
OFFICE OF CONSERVATION AND COMMUNITY AFFAIRS
November 24, 2003
iy1ENI TORANDUNT
TO: Melba McGee, State Clearinghouse
FROM: Mike Schafale, Natural Heritage Program m`? ?'f*?=
SUBJECT: Proposed Mallard Creek High School Scoping
1.7 As noted in the document, the project site includes part of Bingham Road Hardpan Forest, a
Regionally significant Significant Natural Heritage Area. Bingham Road includes occurrences of
two rare natural communities - Xeric Hardpan Forest and Upland Depression Swamp Forest.
The latter would include jurisdictional wetlands. This project is likely to be destructive to the
site, with indirect effects of new artificial forest edges and losses of habitat for component
animals exacerbating direct impacts. The project should attempt to minimize impact to all of the
forested area at its northeast corner, and should consider mitigation in the form of preservation of
the intact forest areas or comparable areas. A similar site, Ridge Road Hardpan Forest, lies
within a mile to the east and may offer excellent preservation opportunities adjacent to existing
private conservation lands.

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Correspondence from
State Historic Preservation Officer

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North Carolina Department of Cultural Resources
State Historic Preservation Office
David L. S. Brook, Administrator
Nfichael F. Easley, Governor
p Lisbeth C. Evans, Secretary
Jeffrey J. Crow, Deputy Secretary
Office of Archives and History
October 30, 2003
Michael A. Iagnocco, P.W.S., Project Manager
Ralph Whitehead Associates, Inc.
P.O. Box 35624
Charlotte, NC 28235
Re: Mallard Creek High-School, Mecklenburg County, County, ER03-2631
Dear Mr. Iagnocco:
Division of Historical Resources
Thank you for your letter of September 25, 2003, concerning the above project.
We have conducted a review of the proposed undertaking and are aware of no historic
resources which would be affected by the project. Therefore, we have no comment on the
undertaking as proposed.
The above comments are made pursuant to Section 106 of the National Historic Preservation
Act and the Advisory Council on Historic Preservation's Regulations for Compliance with
Section 106 codified at 36 CFR Part 800.
Thank you for your. cooperation and consideration. If you have questions concerning the
above comment, please contact Renee Gledhill-Earley, environmental review coordinator, at
919/733-4763. In all future communication concerning this project, please cite the above-
referenced tracking number.
Sincerely,
a e, L
avid Brook
www.hp o.der.state.nc.us
Location Mailing Address Tclephone/Faa
ADMINISTRATION 507 N. Blount St.. Raleigh NC 4617 Mail Service Center. Raleigh NC 27699-1617 [phone] • 733-8653
RESTOPUTION
SURVEY & PLANNING 515 N. Blount SL. Raleigh NC
515 N. Blount SL. Raleigh NC 4617 Mail Service Center. Raleigh NC 27699-4617
Raleigh NC 27699-1617
4617 Mail Service Center [phone] • 715-3801
(919)733 .6545 • 715-4801
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Attachment .T
Horticultural Facility Relocation Site Information
I
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N MALLARD CREEK COMMUNITY PARK - HORTICULTURAL FACILITY
Mecklenburg County Parks and Recreation (MCPR) has a need for an improved
horticultural facility to accommodate landscaping needs at area parks. Within northeast
Mecklenburg County, MCPR currently utilizes a former commercial plant nursery on
Johnston-Oehler Road, located on County-owned property within Mallard Creek
Community Park. The horticultural compound (formerly Clark's Plant Nursery), is
located on a 4-acre compound within a 52-acre parcel (Figure 1, attached). The
approximate 4-acre compound is fenced and houses a small greenhouse, sheds, and
storage areas. MCPR is currently in the process of relocating this facility to an
approximate 32-acre site that would better accommodate MCPR's horticultural needs. A
larger site, also owned by the county, near Mallard Creek Community Park has been
identified at the intersection of Johnston-Oehler Road and Mallard Creek Road (Figure
2, attached). Project components include office space, staff parking area, storage
buildings, gravel driveway, turf field areas, and tree field areas. The relocated facility will
be connected to water and sewer infrastructure located adjacent to the site. As
described below, no impacts to jurisdictional waters of the U.S., including
wetlands, will occur on the new horticultural facility site as a result of the facility
r-r relocation.
Ralph Whitehead Associates, Inc. (RWA) was contracted to provide wetland delineations
and assessment as well as environmental impact analysis for the relocation of this
facility. RWA personnel performed site reconnaissance of the proposed project area,
evaluating natural resource features such as wetlands, streams, flora, and fauna.
Findings of Field Review
This approximate 32-acre site is undeveloped and consists primarily of woodland and
encompasses a former rural residence. Remnants of the rural residence include a barn,
a well house, and a suspected out-of-service septic tank. Utility easements, namely
Duke Energy overhead electric and Charlotte-Mecklenburg Utilities (CMU) sanitary
sewer, are located on the site along Stony Creek, which is located on the southern
boundary of the parcel. Mallard Creek Road bounds the parcel to the west, with
residential development abutting on the northern and eastern boundaries.
Forest resources comprise approximately 85 to 90 percent of the 33-acre project site.
Wooded areas are comprised of a mix of deciduous trees. On-site vegetation includes
red maple (Acer rubrum), sweetgum (Liquidambar styraciflua), American sycamore
(Platanus occidentalis), tulip poplar (Liriodendron tulipifera), tag alder (Alnus serrulata),
ironwood (Carpinus caroliniana), flowering dogwood (Corpus florida), green ash
(Fraxinus pennsylvanica), rose (Rosa sp.), Japanese honeysuckle (Lonicera japonica),
elderberry (Sambucus canadensis), blackberry (Rubus sp.), Chinese privet (Ligustrum
sinense), and greenbriar (Smilax rotundifolia).
Wildlife common to suburban areas, including mockingbird (Mimus polyglottos), cardinal
(Cardinalis cardinalis), raccoon (Procyon loto), gray squirrel (Sciurus carolinensis), and
cottontail (Sylvilagus floridanus), to name a few, are expected to occur in the project
area.
Results of the field observations also indicate the presence of jurisdictional waters of the
U.S., including wetlands, on the proposed project site (Figure 3, attached). Jurisdictional
0 J-1
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areas identified on-site include Stony Creek (Stream 1), three unnamed tributaries of
Stony Creek (Streams 2, 3, and 4), and two wetland areas (Wetlands A and B). No
waters or wetlands identified on site appeared to be isolated in the landscape.
Stony Creek (Stream 1) is an easterly flowing perennial stream, the center line of which
constitutes the southern property boundary (Photographs 1 and 2). On-site, Stony
Creek ranges in top-of-bank width from an estimated 15 feet within the Duke Power
right-of-way to 25 - 30 feet at the eastern and western ends of the site. Bank heights
generally range from 2 - 4 feet. Streamside riparian vegetation along the majority of
Stony Creek includes river birch (Betula nigra), red maple, American sycamore, tulip
poplar, tag alder, ironwood, and flowering dogwood. Trees and shrubs have been cut
and/or removed along Stony Creek within the Duke Power right-of-way, and the creek
lacks canopy cover at this location. Vegetation along this portion of Stony Creek
includes Japanese honeysuckle, elderberry, blackberry, and greenbriar.
Stream 2, which enters the site through a culvert beneath Mallard Creek Road at the
northwestern corner of the site, is an unnamed tributary of Stony Creek. Light flow was
observed the entire length of this stream. The upstream portion of Stream 2 ranges in
top-of-bank width from 4 - 6 feet, and has bank heights of less than 1 - 2 feet
(Photograph 3). This stream was assessed to be aquatically unimportant. Stream 2
becomes partially braided in the upstream portion, where two wetland areas (Wetlands A
and B, described below) surround it. Vegetation along this portion of Stream 2 includes
green ash, rose, Japanese honeysuckle, greenbriar, flowering dogwood, silky dogwood
(Corpus amomum), and slippery elm (Ulmus rubra). The middle portion of this stream is
better defined than the upstream portion, with continuous bed and bank features. Top-
of-bank width in the middle portion is 3 - 4 feet with bank heights of 1 - 2 feet.
Vegetation along this portion of Stream 2 includes red maple, American sycamore,
flowering dogwood, winged elm (Ulmus alata), hackberry (Celtis laevigata), sweetgum
(Liquidambar styraclflua), and Chinese privet.
The downstream portion of Stream 2, through the location of a remnant pond bed, lacks
clearly defined bed and bank features. The stream in this area is 2 - 3 feet wide.
Vegetation in the former pond area includes red maple, sweetgum, green ash, flowering
dogwood, silky dogwood, hackberry, and winged elm (Photograph 4). The bed and bank
become well-defined downstream of the former pond's earthen dam, with bank heights
of 1 - 3 feet and a top-of-bank width of 3 - 4 feet.
Stream 3 is an unnamed tributary of Stony Creek located in the eastern portion of the
site. This stream has bank heights of 2 - 3 feet and a top-of-bank width of 2 - 3 feet.
Light flow was noted in this stream at the time of the site visit. This stream was
determined to be aquatically unimportant at its northern-most reach, and aquatically
important on the downstream portion. Riparian vegetation associated with Stream 3
includes flowering dogwood, winged elm, red maple, sweetgum, red cedar (Juniperus
virginiana), and greenbriar (Photograph 5).
U Stream 4 is an unnamed tributary of Stony Creek located within 100 feet of the eastern
property boundary. This stream had pockets of water at several distinct headcuts (e.g.,
abrupt elevation changes) but was otherwise dry. Top-of-bank width was 2 - 3 feet and
bank heights were 1 - 2 feet (Photograph 6). This stream was determined to be
aquatically unimportant. Vegetation along Stream 4 included red maple, tulip poplar,
winged elm, and buckeye (Aesculus sylvatica).
N J-2
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portion of the site (Photographs 7 and 8). Each of these areas is small (estimated to be
less than 1/10th acre). Dominant vegetation in these wetlands includes green ash,
slippery elm, flowering dogwood, silky dogwood, Japanese honeysuckle, Indian
strawberry (Duchesnea indica), and three-way sedge (Dulichium arundinaceum).
Evidence of wetland hydrology in these areas included saturated soils within the upper
10 inches, drainage patterns, and water stained-leaves. Soils in these areas had
brownish gray loam that had distinct mottles. This combination of soil characteristics is
indicative of hydric soils.
Jurisdictional waters of the U.S., including wetlands, were delineated in the field by
Ralph Whitehead Associates, Inc., on April 27, 2004. The boundaries of jurisdictional
wetlands/waters were marked in the field. The delineation was verified by the U.S. Army
Corps of Engineers on April 29, 2004. The wetland boundary survey is pending.
According to the Mecklenburg County Property Ownership Land Records Information
System (POLARIS), Stony Creek has a 100-foot wide Surface Water Improvement and
Management (SWIM) buffer throughout the subject property.
Potential Environmental Impacts
By its nature, the horticultural facility is expected to be a low-impact development, and
thus poses little impact to natural resources. The majority of the parcel will remain as
pervious ground, supporting trees, shrubs, and other plants that will be used in
landscaping practices throughout the MCPR system. The relocation activities will result
in the permanent removal and conversion of approximately 50 percent, or approximately
16 acres, of currently wooded areas to impervious and/or improved surfaces. Of those
16 acres, approximately five acres would be impervious surface as a result of the
buildings and driveway. Based on conceptual design (Figure 4, attached), the
relocation of the horticultural facility to this location will not result in impacts to
jurisdictional waters of the U.S., including wetlands. Proposed utility connections
also would not result in impacts to jurisdictional waters of the U.S. (Note: a CMU
sanitary sewer is currently planned for installation on the future horticultural center site.
This sewer is being designed to provide sewer service to several single-family
residences located north of the site. It is anticipated that the future horticultural center
will either tie into this sewer or into the existing sewer along Stony Creek.)
As previously mentioned, the Mecklenburg County POLARIS database identified a 100-
foot wide surface water buffer along Stony Creek. Based on conceptual design,
components of the horticultural facility will not adversely encroach on the SWIM buffer.
Additionally, development proximal to this portion of Stony Creek will be restricted in
accordance with local SWIM ordinances.
To reduce potential soil erosion concerns, a NCDENR-approved sedimentation and
erosion control plan would be adhered to during construction activities.
The grading associated with the proposed relocation project is not expected to result in
adverse impacts to water resources, soils, land use, air quality, fish, wildlife, or noise.
0
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Schedule
The relocation of the existing horticultural facility is expected to occur during Fall 2004.
Grading and building components will be completed first, from approximately November
2004 thru March 2005. The new horticultural facility is scheduled to be operational by
March 2005. Sowing, propagating, and management of plants for later transplant within
MCPR properties would occur on a continual basis.
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North Carolina Vicinity Map
Mecklenburg County Parks & Existing Si
Recreation RALPH WHITEHEAD Location
Proposed Horticultural ASSOCIATES, INC.
Facility FIGURE 1

Mecklenburg County Vicinity Map

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North Carolina Vicinity Map
Mecklenburg County W RALPH WHITEHEAD Site Location
Parks & Recreation Future Horticultural
Proposed Horticultural ASSOCIATES, INC. Facility
Facility FIGURE 2
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NOTE: Jurisdictional waters of the U.S.,
including wetlands, were delineated in the field
;° by Ralph Whitehead Associates, Inc., on April
27, 2004. The boundaries of jurisdictional
."a® wetlands/waters were marked in the field. The
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Corps of Engineers on April 29, 2004.
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Potential Jurisdictional Wetland
r = Stream Assessment Location

?r Wetland Determination
Data Point
r
Important Jurisdictional Stream
.......... Unimportant Jurisdictional Stream
Perennial Stream
Approximate Waters of the U.S. and Prepared By Checked By
Mecklenburg County Parks and Wetlands Boundary Map
Recreation

Proposed Horticultural Center RALPH WHITEHEAD

1 1
W ASSOCIATES, INC. 4/29/04 Figure 3

MECK,ENEURO COUTTYPARKS &RECREATION
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PROPOSED HORTICULTURAL CENTER
Site Plan
GRAPHIC SCALE
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TURNBULL © SIGMON DESIGN
TO:
Cyndi Karoly
NCDENR-DWQ/Wetlands/401 Cert. Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, NC 27604-2260
TEL: [phone]
DATE: January 11, 2005
REFERENCE: 03055 - Mallard Creek
High School
TRANSMITTED VIA:
? COURIER
? MAIL
® OVERNIGHT
? BYHAND
ACTION:
® FOR APPROVAL
? FOR YOUR USE
? AS REQUESTED
? FOR REVIEWAND COMMENT
? APPROVED AS SUBMITTED
? APPROVED AS NOTED
? RETURNED FOR CORRECTIONS
CC:
Brian Sigmon, RLA-TSD
E. Carr Mumford, RLA - TSD
WE ARE SENDING:

® ATTACHED ? UNDER SEPARATE COVER
t • 1
ITEM DATE DESCRIPTION
2 12/10/04 Stormwater Management Application (one original,
one copy)
2 12/10/04 401 Wet Detention Worksheet (one original, one
copy)
2 12/10/04 `Vet Detention Basin Operation and Maintenance
A reement one original, one copy)
2 12/6/04 Calculations wet detention basin)
2 12/9/04 Overall Stormwater Management Plan
2 7/15/04 Grading Plan
2 10/19/04 Stormwater Management Basin
2 1/11/05 Stormwater Treatment Narrative

COMMENTS:
Cyndi,
Attached you will find our water quality submittal for Mallard Creek High
School. The project is currently under review by NCDENR for erosion
and sedimentation concerns. In addition, the wetland permitting is
currently underway and being coordinated by Mike Iagnocco of Ralph
Whitehead and Associates. Please do not hesitate to call should you need
to discuss or have any questions during your review. Thank you for your
assistance.
Sean T. Calloway, PE
Principal
Land 1001 Morehead Square Drive Phone: 70¢-529-6500
Development Suite 530 Fax: [phone] TRANSMITTAL
Design Services Charlotte, NC 28203 tumbullsigmon.com i
OFFICE USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
G%4 111 =tom T C +.ACI??G-tom wS V--V V..Gt -jti,TJ ?o t?a?
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
a.1.3TU'VI'J•( 4t.•pp,-0, 1cpsa-G.*rvC*- ov-- p.=aItTk::..'.tTv?-?
3. Mailing Address for person listed in item 2 above:
City: ,- ?A.G-t..0-re a State: O?-14 Zip:
Telephone Number: ( -")Li0 ) 3• yl ,::),}
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
M o %-%- G. C-D UGC w- t_lt t4 0
5. Location of Project (street address):
0-1 ??T® %J O i t.l LrG t7
City: .Gt1 D. rr*t= County: Art v .&
i •v _
6. Directions to project (from nearest major intersection):
Wr t.JTCa ' ?3Cs ©..1 Gt !sl T to A CGS iati.,j y 4 W744-t„ & C o GCE e.. MJ>.
'r+ =c?•../t t? ?OC-TsA t " u#Q%A LILT ? T? ':Poa ..`?+yN°...'Iywl• OaL4%.Cf'?
7. Latitude:
Long
of project
8. Contact person who can answer questions about the project:
Name:_ ---KZ&" ®t??.a+Jtt-( Telephone Number:
II. PERMIT INFORMATION:
1. Specify whether project is (check one): ? New Renewal
'210 • !.S'ca
Modification
Fomn SWU-101 Version 3.99 Pagel of4
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density !<High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major ?$edimentation/Erosion Control /404/401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
_*27^C47 a_% % J late:.: - F v?.1 'TLC' U IZI %A ":Wo% Lao 4.. W i t,.L Pa
G7 ••1 ?: G-??O 1 N Tim A. U-L T dC Iv?'r.f'i'1 ®wl 1F??.rj I.IC CL %T
W? c I?cmnic a v c vti % T "i1.1G *-J -r'-tac- 4
as ?Gv c ` MVP vC. R.
2. Stormwater runoff from this project drains to the C? C'?=? wJ River basin.
3. Total Project Area: 40?7 • - Z acres 4. Project Built Upon Area: 4eM %
5. How many drainage areas does the project have? "I-
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information Drainage Area 1 Drainage Area 2
Receiving Stream Name
Receiving Stream Class G

Drainage Area
-4(,o. OS A.C. G
• O
Existing Impervious* Area i , c';5i c6& * . c;vp aG
Proposed Impervious*Area Jcaj . 47 d.G. cia V.. p ?+.G
% Impervious* Area (total) s
Impervious* Surface Area Drainage Area 1 Drainage Area 2
On-site Buildings ? 1- X11 ?iF ' ? ?
On-site Streets
On-site Parking .4?r?:tj L?? s?j? 20[i v
On-site Sidewalks 11 SLR 1?}
Other on-site 102
Off-site
Total: v21 &-r-y1 Total:
11pu! viuus diva is ueimeu as [ne ounr upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU401 Version 3.99 Page 2 of4
How was the off-site impervious area listed above derived?
L'T1C l jT1..a.+1 .?? ©'?"w.1't ?1?.`. 4?i3.L LS?Pe?? G04.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built-upon area for each lot must be provided as an attachment.
L The following covenants are intended to ensure ongoing compliance with state storm water management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
J? 2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwatcr control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form (s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form -_07r-
• One copy of the applicable Supplement Form(s) for each BMP i+st•?,
• Permit application processing fee of $420 (payable to NCDENR) .?-?.?.
• Detailed narrative description of stormwater treatment/management ?''.r*?z„?
• Two copies of plans and specifications, including:
*??,,
Development/Project name
Engineer and firm
-Legend
North arrow
- Scale
- Revision number & date
Mean high water line
Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
Original contours, proposed contours, spot elevations, finished floor elevations
Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations
Drainage areas delineated
Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (Individual or firm): Ty V-* *4 D"wt.t_ -11;;1A Mtl o&J ??-...?ArJ
Mailing Address: t4715" M.?tZ.G ? a.,p ?+? v??.c T! --Z-, 0 1TC,. r.,?p
City: G??1©G.L/tTG State: *4e_ Zip: 2r,
Phone: ( Z ?? ) 2g • 6r4 y© Fax: ( 'I a.A ) h2 - ©arn.
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General information, item 2)
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformancw' the approved plans, that the required deed restrictions
and protective covenants will be recorded, andA the proposed project complies with the requirements of 15A
NCAC 21-1.1000. 1_*?
Date: D
Fonn SWU-101 Version 3.99 Page 4 of 4
WET RVEqLANDI DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
[Wetland maintenance wording is bracketed. Please modify the document as appropriate.]
The wet [xettar?t] detention basin system is defined as the wet [Watfand] detention basin, pretreatment
including forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet [#fe°?;>;i] detention basin system for sediment accumulation, erosion, trash
accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet [=tlaad] detention basin system semi-annually or when
depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be
disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact
water quality (i.e. stockpiling near a wet [R#] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads- feet in the main pond, the sediment shall be removed.
[For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the
sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of
soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations.
Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stockpiled
for more than two weeks.]
When the permanent pool depth reads "' feet in the forebay the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
V Permanent Pool Elevation 'I Uo • °p
Sediment moval El. ? Z? 75%
-------------- -- ...... Sediment Removal Elevation_, *7 75%
Bottom E vation ? 21 5% 00 --------------------------------------- -------
Bottom Elevatinn '720 A')C;04/
FOREBAY MAIN POND
Pagel of 2
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
[For wetlands: Wetland planting densities in the marsh areas should be maintained by replanting bare
areas as needed. Wetland plants should be encouraged to grow in the marsh areas.]
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wet [t rt"dj detention basin system shall be maintained in good working order.
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or
replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: 0.aTa4Wb"-1 A.&4 -fta'aL..p a
Title:
Address:
Phone:
r? % r-a c- err
Signature:
Date:

Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
1, - ?v CzV1 - 'r r >fl , a Notary Public for the State of 11,10r-pl) 0nroII(irk
County of 10 ;.)?-)) do hereby certify that __ i?71 r1ti11\( 4,. `O WO
personally appeared before me this j0 day of ??)C ey 11Oe tf (; _ , and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,

SEAL
My commission expires_ i lc Air 11 l ;0 c
Page 2 of 2
Project No. DWQ (to be provided by DIVQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : NI a"wrLV Gt=C csv? "1414
Contact Person: .SGs••i Ga?.t•.v.?a.-{ Phone Number: f7 ) ??•4e7oa
For projects with multiple basins, specify which basin this worksheet applies to: F.a I A.
Basin Bottom Elevation -7 Z a ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 17 z t® ft. (elevation of the orifice invert out)
Temporary Pool Elevation -7 Z.Z . pto ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area Z•Z. 2.4o, sq. ft. (water surface area at permanent pool elevation)
Drainage Area ?L. oy ac. (on-site and off-site drainage to the basin)
Impervious Area 1 • `;>4 ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume 7;'o740;> cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume '71 . 4 4V cu. ft. (volume detained on top of the permanent pool)
Forebay Volume t * ," 2 cu. ft.

SA/DA used . v` (surface area to drainage area ratio)
Diameter of Orifice .2V in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. Ifa requirement has not been met, attach an explanation of
why.
Applicants Initials
,0'3& The temporary pool controls runoff from the 1 inch storm event.
The basin length to width ratio is greater than 3:1.
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
-0--tZ. Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
'•.? The temporary pool draws down in 2 to 5 days.
The forebay volume is approximately equal to 20% of the total basin volume.
G Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
irht A minimum 30-foot vegetative filter is provided at the outlet.
y A site specific operation and maintenance (O&M) plan is provided. of /uAC.GCPAQKT-
A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the O&M plan.
-01jr- A debris check is specified in the O&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan. -or•-1 T'6-0, %A i
'-? A responsible party is designated in the O&M plan. bAV-Me-fA
FORM SWGI00 09/97 Page 1 of 1

TURNBULL SIGMON DESIGN
lool Morehead Square Drive
Suite 530
Charlotte, North Carolina 28203
Phone: [phone]
Fax: 704.522.o882
Mallard Creek High School
Project No: 03055
CALCULATIONS FOR:
Water Quality Basin
tti LtYt?^ E:Ca?r??^
Fad, ?/aA toc4ooor,Y?, ?, ?;^
tt ?
DATE: December 6, 2004` 1Tr
REV.
Mallard Creek Hi School Turnbull Sigmon Design
JOB NO.: 03055 BY: STC iooi Morehead Square Dr., Suite 530 g
DATE: 1216104 P.M.: ECt1S Charlotte, North Carolina 28203 I
REVISED: WATER UALITYBASINDESIGN
WATER Q UALITY REQ UIREMENTS FOR BASIN #t
To meet the Water Quality requirements, the procedure outlined in the "Stormwater Best
Management Practices" published by NCDENR will be used. This guide gives the
required pond surface area and storage volume to meet an 85% pollutant removal
efficiency. Also, the pond must detain the first 1" of rainfall and release this volume
over a period of 2 to 5 days. Calculations for these requirements are as follows:
Surface area reauirements
Drainage area to pond (Da)= 46.05 Ac
Post-development impervious percentage = 42%
Average pool depth = 6 ft
Designed permanent pool elevation = 726
From table 1.1 in the BMP guidelines the required Surface Area to Drainage Area
Ratio (SA/DA) for a permanent pool depth of 4 feet = . 1.09
Required surface area = SA/DA / 100 x Drainage area=
Surface area of pond as designed at permanent pool elevation =
s"rain all requirements
Using the runoff volume calculations in the "Simple Method" :
Rv = 0.05 +.009 (1)
Rv= 0.428 in/in
Volume = (Design rainfall) (Rv) (Drainage Area)
Volume = 1" rainfall x Rv in/in x 1/12 in/ft x Da =
This volume must be released over a period of 2-5 days
or
0.50 Ac
0.51 Ac
1.64 ac-ft
71545 ft^3
% PER]IL4NENT POOL DEPTH
Impervious 3 4 5 6 7 8 9
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
12 0.67 0.55 0.48 0.4 0.35 0.32 0.3
20 0.97 0.79 0.7 0.59 0.51 0.46 0.44
25 1.6 0.94 0.84 0.72 0.61 0.55 0.53
30 1.34 1.08 0.97 0.85 0.7 0.64 0.62
38 1.65 1.36 1.19 0.99 0.86 0.78 0.74
40 1.73 1.43 1.25 1.03 0.9 0.82 0.77
45 1.87 1.58 1.38 1.18 1 0.91 0.85
50 2 1.73 1.5 1.33 1.09 1 0.92
55 2.2 1.88 1.58 1.42 1.19 1.09 1.01
60 2.39 2.03 1.66 1.51 1.29 1.17 1.1
65 2.57 2.15 1.81 1.65 1.39 1.26 1.2
70 2.75 2.27 1.96 1.79 1.48 1.35 1.29
72 2.82 2.32 2.02 1.85 1.52 1.39 1.33
75 3.04 2.39 2.11 1.93 1.58 1.44 1.39
80 3.25 2.51 2.26 2.07 1.67 1.53 1.48
85 3.47 2.63 2.41 2.21 1.77 1.62 1.58
90 3.68 2.75 2.56 2.35 1.86 1.71 1.67

Mallard Creek Hi School Turnbull Sigmon Design
JOB NO.: 03055 BY: STC iooi Morehead Square Dr., Suite 530 -

DATE: 1216104
P.M.: ECaI
Charlotte, North Carolina 28203 0
REVISED: WATER UALITYBASINDESIGN --
WATER QUALITYBASIN #1 MODEL
Water Quality Basin Storage Volumes
Elevation
(ms0 Area
(SO Area
NO Volume I
(cu-ft) i Volume
(ac-ft)
720 5703 0.1309 0 1 0.0000
721 9152 ! 0.2101 7352 f 0.1688
722 ( 10506 I 0.2412 17164 0.3940
723 11937 i 0.2740 { 28367 0.6512
724 13446 1 0.3087 41038 0.9421
725 j 15028 I 0.3450 I 55253 1.2684
726 1 22264 1 0.5111 73763 1.6934
727 1 24165 ' 0.5548 96947 i 2.2256
728 26134 0.6000 122065 2.8022
729
11 28180 0.6469 149189 3.4249
Elevation Interpolation

Elev Storage Area Storage Area
728
Elev
729 1.1089
1.6425
1.7315 26134
27887
28180
Story a elevation = 2.86 ft. above .permanent pool elev.
Story a elevation = 728.86
Determination of Orifice size for 2-5 day drawdown
oreball Storage Volumes (29.6900)
Elevation
(mst) Area
(so Area
; (ac) Volume
(cu-ft) I Volume
(ac-ft)
721 2711 ! 0.0622 ! 0 0.0000
722 i 3288 0.0755 2992 I 0.0687
723 3903 1 0.0896 6579 0.1510
724 ( 4556 1 0.1046 10800 i 0.2479
725 5245 0.1204 15692 1 0.3602

i 1

7
a= 2A x sgrt(h) 'Falling head equation
Cts rt2 )
a= Area of orifice a sqft
t= Time to drawdown 172800 sec 2 day min.
A= Average pond surface area 25076 sf
g= Gravity constant 32.2 ft/s^2
h= Change in head 2.86 ft
-- C= Orifice constant 0.6
Maximum orifice area = 0.101880766 sqft
Maximum orifice size = 4.32 inches da drawdown)
Storage Volumes
Elevation 1
(mst) i Area
(ac) Volume
(ac-ft)
726 0.5111 0.00
727 0.5548 I 0.53
728 0.6000 ! 1.11
729 0.6469 1.73

1

? I
I i
Determination o High Water Elevation
F Q: 3.33lh^312
Q= 10 yr. storm runoff 194.00 cfs
1= weir length 24.00 ft
h= elevation over weir h ft
h= (Q/3.33 x I)^2/3
h= 1.80619
Elevation 730.66
Determination ofEmergenciJ Spillway Size
Q=3.331h^3/2
Q= 100 yr. storm runoff 275.00 cfs
1= weir length I ft
h= elevation over weir 1.25 ft
1= Q/(3.33 x I^3/2)
Len th 59.09
730.75
?? ?? 671
Mallard Creek High School Turnbull Sigmon Design
JOB NO.: 03055 BY: STC iooi Morehead Square Dr., Suite 530 0
DATE: .1216104 P.M.: ECM Charlotte, North Carolina 28208
REVD: FLOATATION CALCULATIONS
Calculations Given Data Standard Footin Assumptions
Buoyant Weight of Concrete 87.6 Ibs/ftA3 1. Footing base to be 1 ft. wider than structure
Weight of Water 62.4 Ibs/ftA3 on all sides.
Safety Factor S.F. 1.25 2. Footing depth to be a minimum of 8 inches in depth.
Equations used:
Outlet Structure Weight, W(s) = 4(w + t) x t x h x W(bc)
where, w = outlet box inside dimension, ft.
Displaced Water Weight, W(w) = 4 x (w + 21) x W(w) x h t = structure wall thickness, ft.
h = height of structure, ft.
Required Base Weight, W(b) = (W(w) x S.F.) - W(s) W(bc)= buoyant weight of concrete, /bs1ftA3
W(w) = weight of water, lbsAftA3
Required Footing Volume, V(0 = W(b) /W(bc) S.F.= safety factor
10uttet Structure #1
Structure Diaieitsimw Db'ect lvei hts
Height of structure, h 9 ft. Outlet Structure Weight, W(s) = 10249 Ibs
Structure wall thickness, t = 6 _
in. Displaced Water Weight, W(w) = 15724.8 Ibs

Outlet box inside dimension, w =
6 ___
ft.
Re 'd Base Weight, W(b = _
9407 Ibs
FOOtin, Size
Required Footing Volume, V(t) = 107 cf Standard Footing Length, L = 9.00 ft.

Provided Footing Volume, V(t) =
Footing Check

oka
162 cf _
_ Standard Footing Width, W =
Minimum Footing Depth, D = _
9.00 ft.
1.66 ft.
Footing Size to be used: Length =
Width =
Depth = 9.00 ft.
9.00 ft. Outlet Structure #1
2.00 ft.
Mallard Cree k Hi Sehool Turnbull Sigmon Design ; .
JOB NO.: 03055 BY: src iooi Morehead Square Dr., Suite 530 0
DATE: 1216104 P.M.: ECar Charlotte, North Carolina 28203
REVISED: STORM DRAINAGE D ESIGN DATA -
LOCATION

_ FROM TO_ DRAIN
AREA

(acre) RUNOFF

C ?_ I O inlet ! O pipe
I (cfs) i (cfs) PIPE
ROUNDED
n SLOPE LENGTH; SIZE SIZE
(ft/ft) ! (ft) (inches) I (inches) TRAVELTIDIE
FULL DELTA TOTAL
VEL T" "T"
(fps) (min) (min) INVERT ELEV.
-
INV INV INV
OUT IN OUT PIPE DEPTH
(FROh1) I (FROM)
RIM _COVER
ELEVATION DEPTH
OS#127 HVV#128 46.05 0.60 7.03 1 1 194.2 0.013 0.010 1 43 53.7 54 12.2 0.06 1 0.06 719.80 1 719.37

i ? I I ---- ?-- I I II
1 - ---- - --'_+-- -I --- -- ------

1
--- -- ---
- ' - -- -I--- I
- ---I- - - ---- I
--
I I j I I

?
I I ? ? I i 1 ?
_
i ,
1 II
i ? 'I I I I ? 1 ? I II
I !

i '? I I I I I I
I I I i I ! ' i 1?
---------------
TURNBULL O SIGMON DESIGN
January 11, 2005
Mr. Mike Higgins
Construction Management Services
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
03055 - Mallard Creek High School
Storm Water Quality
Mr. Higgins:
The Mallard Creek High School project shall be designed to correspond with the existing drainage
characteristics for the site. Currently, the entire site drains to Stoney Creek. The proposed grading of the
high school and park site will be separated into two main drainage basins, drainage basin #1 and drainage
basin #2, respectively. It should be noted that Stoney Creek is a regulated floodway for a portion of our site;
therefore, storm water detention requirements will be waived for the project from local governing agencies by
providing permanent storm water detention easements to the regulated portion. Due to the high amount of
impervious areas associated with the development of a new high school, a water quality basin will be
Y? provided for drainage basin #1. This water quality device will be designed for the removal of 85% of the total
suspended solids and convey the storm water outfall via level spreader to Stoney Creek. An existing 35'
SWIM buffer currently exists along Stoney Creek and will be adhered to per Mecklenburg County
Ordinances. This SWIM buffer will further assist water quality by providing an additional level of treatment as
a filter strip between the level spreader and Stoney Creek.
Drainage basin #2 is associated with the athletic fields across Bingham Drive. The total impervious area for
91- this basin is 11% of the drainage area. As a result, no water quality treatment basin will be provided.
However, the existing 35' SWIM buffer will provide some level of treatment as a filter strip for the basin.
In summation, the overall storm water quality management plan for the proposed development will
incorporate a water quality basin for the high amount of impervious area associated with the school site,
designed for 85% TSS removal, level spreader and 35' SWIM buffers in an effo rt to remove a majority of the
potential toxins prior to entering the waters of Stoney Creek.
Please call should you have any questions or need to discuss the aforementioned information.
t%) 0111
Sean T. Calloway, PE
Principal
cc: Craig Norsted, AIA - LS3P
Brian Sigmon, RLA - TSD
E. Carr Mumford, RLA - TSD
Mike lagnocco - RWA
Land 1001 Morehead Square Drive
Development Suite 530
Design Services Charlotte, NC 28203
Phone: [phone]
Fax: 70¢-522-0882
turn bullsigmon.com
DUxQ_04-1530
OFFICE USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original F E B C 9 2!, J 5
1. GENERAL INFORMATION
Applicants name (specify the name of the corporation, individual, etc. who owns the project):
G J A =L.-" T C r'-'V C. G j . - ` 4`
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
p..J?Lo?.?.? 4 .%at..?P, ?G??C- era' '= of
3. Mailing Address for person listed in item 2 above:
City: .GaA6+G-t...State: a 4. Zip: ^...?Zo.?
Telephone Number: L_96o ) -*43j. U1 ,::>
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
t-A 0 %.A- c. C.D .rte '-eC%Z_ &.114LJ --_'zf"I'll L..
5. Location of Project (street address):
City: e-o D• CA-OF TTt County: M 0e4 ._ _ w4 r:;, Lo mg:,
6. Directions to project (from nearest major intersection):
DT twlt'GC?'°.?Cic'To?.l op Wl- c.14CC.t? T.?L.?lt7 4 MS.L,? pC-V G? GG? CLD.
T+=o..I ` e.?oe-ry? i Tv=%A Lacr (,?:., T) o?.l .:?yN .a• oQy?cr.?
7. Latitude: Longitude: of project
8. Contact person who can answer questions about the project:
Name: ®rS ?G.1.i?G?tJC.?( Telephone Number: (704 ) 52t> • &Sov
H. PERMIT INFORMATION:
I. Specify whether project is (check one): v0'00 New Renewal Modification
RM =97=0
Fonn SWU-101 Version 3.99 Page 1 of4 FEd 2 g 2005
OENR - WATER QUALi i Y
WERMDSMD STORMUTER BRANCH
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density ZHigh Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major ?tedimentation/Erosion Control je404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
- ?'sro=.%0% tJ tact.: F ©M R.LE U te,% t -'PA1ooL_ Fv?.??o?- ?t tLC. P?1T
1-1 ?.: CLr?O ! N Ta /a ?t.lEs T l>e'1` ?.!'i1 owl ??
WU-%.- ?+. `c MiVG ;a oG v % T?r??a -t'ti,1Ga 47VT-L-X0M- t0 T"C4-Wti%(
2. Stormwater runoff from this project drains to the
3. Total Project Area: °>-I• L Z
,--{AV%L. I w.1
River basin.
acres 4. Project Built Upon Area: ZPM %
5. How many drainage areas does the project have? _Z
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information Drainage Area 1 Drainage Area 2
Receiving Stream Name
Receiving Stream Class ,,?.yrpy LCCt=O?. iSrrz7..i./a vc
Drainage Area
Existing Impervious' Area ! , 9?_W Ne_ ?p &4
Proposed Impervious"Area 1-0).49 b-G ;? 4e.
% Impervious" Area (total) A 1 ;?, % 11 o.,? -X.
Impervious` Surface Area Drainage Area 1 Drainage Area 2
On-site Buildings , 1--) a! 1 ?i
On-site Streets
On-site Parking 1%?3 2011
On-site Sidewalks 11
Other on-site
Off-site
Total: v'L1 G,9'1 47vo Total: Zy' we
the ounr upon area inciuaing, but not limited to, buildings, roads, parking areas,
1-p-walks, gravel areas, etc.
Fonn SWU-101 Version 3.99 Page 2 of 4
How was the off-site impervious area listed above derived?
?'?C l ?'"?t"I .J f,-1 ?G?.?• ?G??.?1'i'10. ? ?3.t G?-^ P v1 G.J T'
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built-upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
IJ I 2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted storm water control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form .?i•?
• One copy of the applicable Supplement Form(s) for each BMP .?s
• Permit application processing fee of $420 (payable to NCDENR) .•?-?tiZ.
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
Development/Project name
Engineer and firm
-Legend
North arrow
Scale
Revision number & date
Mean high water line
Dimensioned property/project boundary
Location map with named streets or NCSR numbers
Original contours, proposed contours, spot elevations, finished floor elevations
Details of roads, drainage features, collection systems, and stormwater control measures
Wetlands delineated, or a note on plans that none exist
Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations
Drainage areas delineated
Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): '"r-y e>svLL "91AMow3 'C=:!--&.1A r4
Mailing Address: 10v? w?1?GG ?1Gao p s.+.Gtvp, "SLPtTC
City: G?deaV_-L..e State: 1?1G. Zip: !24? Z41--5
Phone: ( ?? ) ?2?i • (j?s ?•o Fax: (Za ) ti2^?.? O^v€3?..
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item Z)
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformanc,?w' the approved plans, that the required deed restrictions
and protective covenants will be recorded, and
the proposed project complies with the requirements of 15A
NCAC 2H.1000.
Date: ? _Z?;
Form SWU-101 Version 3.99 Page 4 of 4
WET VVEFIDj DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
[Wetland maintenance wording is bracketed. Please modify the document as appropriate.]
The wet [.,,tetlard] detention basin system is defined as the wet [ZzEtta" detention basin, pretreatment
including forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet [#+j detention basin system for sediment accumulation, erosion, trash
accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet [ :laRd] detention basin system semi-annually or when
depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be
disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact
water quality (i.e. stockpiling near a wet [umg.aad] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads A_ feet in the main pond, the sediment shall be removed.
[For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the
sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of
soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations.
Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stockpiled
for more than two weeks.]
When the permanent pool depth reads ?'? feet in the forebay [axe--r;ia , the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
V Permanent Pool Elevation 124i - °0'
Sediment moval El. 7 Z 75%
-------------- -- Sediment Removal Elevation ?Z2__ 75%
Bottom E vation ? t 5% ------ ------------------------------- --
Bottom Flevation '120 11) X; oi /
FOREBAY MAIN POND
Pagel of 2
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
[For wetlands: Wetland planting densities in the marsh areas should be maintained by replanting bare
areas as needed. Wetland plants should be encouraged to grow in the marsh areas.]
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wet [" detention basin system shall be maintained in good working order.
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or
replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: d?a'ra v?.ti? ?? ?.!aL..D cp
Title: b.?TtV V- a
Address:
Phone: X13 O - ---1r4 V?P' . C
Signature:
G-*.d b. taw T ",C- 011 2-0 2c9 v
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
I, ??v' ?1 uJ - 1 ?Lt 1(1 , a Notary Public for the State of K+.C r-*) l ro I° j r
County of do hereby certify that I ' r
personally appeared before me this i0 day of Od_ , and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,

SEAL
My commission expires i lc AS?Y^ i I n? r
Page 2 of 2
Project No. DWQ (to be provided by DWQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormwater Management Plan Review
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : M e??„?. p. ?•v GEC Ghti=. t. W,ta -;--J 60
Contact Person: •?iGc...i Ga?..?.??.-{ Phone Number: For projects with multiple basins, specify which basin this worksheet applies to: _
0
Basin Bottom Elevation -7 Z a ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 17 Z t® ft. (elevation of the orifice invert out)
Temporary Pool Elevation 17 ZZ . ;;to ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area ZZ.?dj4 - sq. ft. (water surface area at permanent pool elevation)
Drainage Area 41,. -G ac. (on-site and off-site drainage to the basin)
Impervious Area 1 -1P . = 4 ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume 7:'974?! cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume -11 , 7 4? cu. ft. (volume detained on top of the permanent pool)
Forebay Volume I C?; to,9 2 cu. ft.
SA/DA used . ® (surface area to drainage area ratio)
Diameter of Orifice • Zti in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. I fa requirement has not been met, attach an explanation of
why.
Applicants Initials
.Ot? The temporary pool controls runoff from the I inch storm event.
The basin length to width ratio is greater than 3:1

.01*? .
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
61_c_ _ The temporary pool draws down in 2 to 5 days.
The forebay volume is approximately equal to 20% of the total basin volume.
G? Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
A minimum 30-foot vegetative filter is provided at the outlet.
S'h'y A site specific operation and maintenance (O&M) plan is provided. v.! F"L&"
"AI A vegetation management/mowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the O&M plan.
1-11IT - A debris check is specified in the O&M plan to be performed after every storm event.
it'' A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
?C- A responsible party is designated in the O&M plan.
FORM SWG100 09/97 Page I of 1
AA C_ ac- MINT'
b6,tZ aV_- JAU..AT'
?0F W ATFRp Michael F. Easley, Governor
?0 G William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
- ----? Alan W. Klimek, P.E. Director
Division of Water Quality
December 14, 2004
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Charlotte-Mecklenburg Board of Education
Attn: Mr. Anthony Ansaldo, Construction Management Services
3301 Stafford Drive
Charlotte, NC 28208
Subject Property: Mallard Creek High School
REQUEST FOR MORE INFORMATION
Dear Mr. Ansaldo:
On October 12, 2004, the Division of Water Quality (DWQ) received your application dated
September 10, 2004 to impact wetlands and waters to construct the proposed high school. The
DWQ has determined that your application was incomplete and/or provided inaccurate
information as discussed below. The DWQ will require additional information in order to
process your application to impact protected wetlands and/or streams on the subject property.
Therefore, unless we receive the additional information requested below, we will have to move
toward denial of your application as required by 15A NCAC 2H.0506 and will place this project
on hold as incomplete until we receive this additional information. Please provide the following
information so that we may continue to review your project.
Additional Information Requested:
1. Response Letter
a. Your letter dated November 23, 2004 explained that the impacts associated with
Mallard Creek High School were below 150 linear feet. In order to provide clear
documentation for the file and to clarify impact amounts, please provide a map and a
table listing the location and amount of impacts.
Please respond within three weeks of the date of this letter by sending this information to me in
writing and Alan Johnson of the DWQ Mooresville Regional Office. If we do not hear from you
within three weeks, we will assume that you no longer want to pursue this project and we will
consider the project as withdrawn.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands
No One
hCarolina
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Charlotte-Mecklenburg Board of Education
Page 2 of 2
December 14, 2004
This letter only addresses the application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application
are not authorized (at this time) by the DWQ. Please call Danny Smith at 919-733-5083 Ext.
353 or Ms. Cyndi Karoly at 919-733-1786 if you have any questions regarding or would like to
set up a meeting to discuss this matter.
Sincerely,
Cyn i Karoly, Supervisor
401 Oversight Unit
CBKlbs
cc: Alan Johnson, DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Michael Iagnocco, Ralph Whitehead Associates, P. O. Box 35624, Charlotte, NC 28235
Filenamc: 04-1530 Mallard Creek High School (Meek) On Hold
OFFICE USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
=-a 0V,17
STORMWATER MANAGEMENT PERMIT APPLICATIO . ,ORIVI J a= y -='
This form may be hotoco icd for use as an original
APR 2 ? X005
1. GENERAL INFORMATION
DENiti:t:r,.!- _irY
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
CIIA0.!=q? M%CV-1-SHAo G Se- HC 0L5
2. Print Owner/SlgningOfficial's name and title (person legally responsible for facility and compliance):
A "T O Nq ('t NS t4 L ??? T i3.t?G'R?? o i: A Rc R,`j'r G'r u
3. Mailing Address for person listed in item 2 above:
`3301 STA F FO IZO D PIT-y -
City: C-H? State: 1,1 Zip: 2137-08
Telephone Number: { q80 ) zLa 6
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
MtAt X_yAr.L? C gnj=EJC.. 14m.µ 'SC-r4,00L
5. Location of Project (street address):
o14r !S Ot4 0F1JLER Y,0AP *?
City: C_. IAA9 3-CffE County: I??ec V-t-eN BURG
6. Directions to project (from nearest major intersection):
B-00P . 1( A V. L- ORTis ANN) TV 2N &Mesr) ON JON NS.r0H 0 F- 14 L-11 P"
7. Latitude: Longitude: of project
8. Contact person who can answer questions about the project:
Name: ?$R`t'IRFy C. G .F 1Z Telephone Number: ( '77!O LI ) ?-6 $C76
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal Modification
Form SWU-101 Version 3.99 Page I of 4
2. If this application is being submitte as the result of a renewal or modification to an existing permit list the
existing permit number NIA and its issue date (if known)
3. Specify the type of project (c cck one):
Low Density High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
iCAMA Major Sedimentation/Erosion Control /404/401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project .
?rwt_ PA&e_rzj = ZAO. 18 4L ---P 1 c?tE4L ?2QC .'C AfLMA = I Iq.$ WC
WXCrIt)Vt4SrTY NS2 r* z. 146.8 AL ---o Ti ,a,-rya f ?A/r?r 4?c 0 _
To 859'0 T;,, ,ay^ov?a (see. A,ccl4g t? N wa a?- E )
2. Stormwater runoff from this project drains to the 1AV,1LX? River basin.
3. Total Project Area: 114.8 acres 4. Project Built Upon Area: %
C.ZS.o tic.
5. How many drainage areas does the project have? I
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information Drainage Area 1. Drainage Area 2
Receiving Stream Name ?? C, -Ct7l,} GR
Receiving Stream Class G.
Drainage Area rq
Existing Impervious" Area I -S
O i? G
:3 1
Proposed Impervious`Area IL1.6 #4c- S
• 3 ? ?•
% Impervious` Area (total) o
Impervious' Surface Area Drainage Area 1: Drainage Area 2
On-site Buildings p -4. Sr- 'Aj25
On-site Streets
On-site Parking e( S ?tS 3
On-site Sidewalks 1117-, 3 _f' 1 sr- _7 -4 l qq 5 r-
Other on-site 4 5 P
Off-site
Total: e F- Total; I$ L15 S lG
Impervious area is dellned as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Fonn SWU-101 Version 3.99 Page 2 of4
7. How was the off-site impervious area listed above derived?
5`;_S=1tL.'1f- ial SST ftm:% t„ r-') ULU a LOP TA
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly. a table
listing each lot number, size and the allowable built-upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
NIA Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface ofswimming pools.
3. Swales shall not be filled In, piped, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed Into the permitted stormwa ter control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-103
Form SWU-109
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
L Please Indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form lia-, LV %
• One copy of the applicable Supplement Form(s) for each BMP 13'L 0-1
• Permit application processing fee of $420 (payable to NCDENR) smv?
• Detailed narrative description of stormwater treatment/management <3C-rA
• Two copies of plans and specifications, including: t?CON
Development/Project name
- Engineer and firm
Legend
North arrow
Scale
Revision number & date
Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off-site), drainage casements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated a
Mailing Add
City: State: L Zip: Zia -J-0,3
Phone: ( 701 ) S7-1 _ 6 500 Fax: (-'4 If •-OORZ
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2)
certify that the information included on this ia ermit a lication form is, to the best of my knowledge, correct and
that the project will be constructed In confowith the approved plans, that the required deed restrictions
and protective covenants will be recorded, at the proposed project complies with the requirements of 15A
NCAC 2H.1000.
2
Signature: Date:
41 ;z
Form SWU-101 Version 3.99 Page 4 of 4
W?

Project Name: Mallard Creek High School
Project No. DWQ 04-1530
Pond No.
SUBA11TTED DESIGN: REQUIRED DESIGN:
elevations
Bottom of Basin (ft) 720
Permanent Pool (ft) 726
Temporary Pool (ft) 728.86
areas
Permanent Pool SA (sq ft) 22264
Drainage Area (ac) . 5
Impervious Area (ac) 19.34
vohanes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 71545
Forebay (cu ft) 15692
other parameters
SA/DA 1.09
Orifice Diameter (in) 4.25
Design Rainfall (in)
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 40
Project Impervious 42.0
Next Highest 50
3.3 average depth
6 ft. depth
2.86 ft. depth
28443 sq. ft.
26759 based on avg depth
42.0 %
71542 cu. ft.
21.3 %
1.42
0.57 cfs drawdown
O lay drawdown
6 ft. Permanent Pool Depth
SA/DA fron (Avg. Depth)
1.34 1.258592346
1.42 1.33
1.73 1.636068092
3ft
(90
J ?-
I
1.08
1.15
1.43
4
ell
1 /11-
65
status
ok
ok
check scnfac
check surfac
ok
ok
check draivc,
Project Name: Mallard Creek High School
Project No. DWQ 04-1530
Pond No.
SUBMITTED DESIGN: REQUIRED DESIGN:
elevations 13 average depth
Bottom of Basin (ft) 720
Permanent Pool (ft) 726 6 ft. depth
Temporary Pool (ft) 728.86 2.86 ft. depth

areas
Permanent Pool SA (sq ft) 22264 28443 sq. ft.
Drainage Area (ac) 46.05 26759; based on avg depth
Impervious Area (ac) 19.34 42.0 %
volumes
Permanent Pool (cu ft) 73763
Temporary Pool (cu ft) 71545
Forebay (cu ft) 15692
other parameters
SA/DA 1.09
Orifice Diameter (in) 4.25
Design Rainfall (in) 1
Linear Interpolation of Correct SAIDA
71542 cu. ft.
21.3 %

1.42
0.57 cfs drawdown
1.5 day drawdown
% Impervious
Next Lowest 40
Project Impervious 42.0
Next Highest 50
6 ft. Permanent Pool Depth
SA/DA fron (Avg. Depth)
1.35 1.265461283
1.42 1.33
1.69 1.608592346
3 ft
status
ok
ok
check suu fac
check surfac
ok
ok
check drawc
1.08
1.15
1.43
4

Project Name: Mallard Creek High School
Project No. DWQ 04-1530
SUBMITTED DESIGN: 1 REQUIRED DESIGN.
elevations

Permanent Pool (ft) 726
Temporary Pool (ft) 728.86 2.86 ft. depth ok
areas
Permanent Pool SA (sq ft) 22264 21865 sq. ft.
Drainage Area (ac) 46.05
Impervious Area (ac) 19.34 42.0 % -
Forebay (ft2) 0 % check forebt
High Marsh (ft2) 0.0% check hi n:ai
Low Marsh (ft2) 0.0% check to mm
Micropool (ft2) 0% check micro,
0 %
volumes
Temporary Pool (cu ft) 71545 71542 cu. ft. ok
other parameters
SA/DA 1.09 1.09 -
Orifice Diameter (in) 4.25 0.57 cfs drawdown -
Design Rainfall (in) 1 1.5 day drawdown check draws,
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 40
Project Impervious 42.0
Next Highest 50
0 ft. Permanent Pool Depth
SA/DA from Table
1.04
1.09
1.3
w
Project Name: Mallard Creek High School
Project No. DWQ 04-1530
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
elevations

Permanent Pool (ft) 726
Temporary Pool (ft) 728.86 2.86 ft. depth ok
areas
Permanent Pool SA (sq ft) 22264 21865 sq. ft.
Drainage Area (ac) 46.05
Impervious Area (ac) 19.34 42.0%
-
Forebay(ft2) 0 % checkforebt
High Marsh (ft2) 0.0% check hi mm
Low Marsh (ft2) 0.0 % check to maj
Micropool (ft2) 0% check micro,
0 %
volumes
Temporary Pool (cu ft) 71545 71542 cu. ft. ok
other parameters
SA/DA 1.09 1.09
Orifice Diameter (in) 3.6 0.41 cfs drawdown -
Design Rainfall (in) 1 2.0 day drawdown ok
Linear Interpolation of Correct SA/DA * * *
% Impervious
Next Lowest 40
Project Impervious 42.0
Next Highest 50
0 ft. Permanent Pool Depth
SA/DA from Table
1.04
1.09
1.3

Project Name: Mallard Creek High School
Project No. DWQ 04-1530
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
elevations

Permanent Pool (ft) 726
Temporary Pool (ft) 728.86 2.86 ft. depth ok
areas
Permanent Pool SA (sq ft) 22264 21865 sq. ft.
Drainage Area (ac) 46.05
Impervious Area (ac) 19.34 42.0 % -
Forebay(ft2) 0 % checkforebc
High Marsh (f12) 0.0 % check hi mai
Low Marsh (ft2) 0.0 % check to mm
Micropool (f12) 0 % check micro,
0 %
volumes
Temporary Pool (cu ft) 71545 71542 cu. ft. ok
other parameters
SA/DA 1.09 1.09 -
Orifice Diameter (in) 2.3 0.17 cfs drawdown -
Design Rainfall (in) 1 5.0 day drawdown ok
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 40
Project Impervious 42.0
Next Highest 50
0 ft. Permanent Pool Depth
SA/DA from Table
1.04
1.09
1.3
?0F W ATFRQ Michael F. Easley, Governor
_? ?i William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
L3 Alan W. Klimek, P.E. Director
Division of Water Quality
June 10, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Storm water Management Plan
Dear Mr. Higgins:
On June 6, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan dated
June 6, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The following
additional information is needed to enable us continue with the reviews of your application:
• New 401 Detention wetland worksheets.
• Pond # 1, surface area, temporary pool, orifice, and the draw down did not meet design requirements.
• Accounts for the entire total project area drainage basins, and flow rates.
• A summary of the present project states, status, impacts area amounts, and mitigation status.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Storm water Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
} ?1114?
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/saa
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, 11530 Charlotte NC. 28203,
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-10-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn://h2o.enr.state.na.us/ncwetlands
o.1 e
N iCarolma
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Project No. DWQ (to be provided by DiVQ)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWQ Stormvater Management Plan Review:
A complete stornnvater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : 1-k it,t?.L?afs.c, Cg=. atc_
Contact Person: C ?At-_-ra t_c eZ
For projects with multiple basins, specify which basin
Basin Bottom Elevation 20 ft.
Permanent Pool Elevation
Temporary Pool Elevation 7? -!a , B6 ft.
Plione Number: (764 ) 521- 6 SQO
this worksheet applies to: tt?c of C'?-- Qu j,
(average elevation of the floor of the basin)
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
Permanent Pool Surface Area 7.7,2. -0 sq. ft. (water surface area at permanent pool elevation)
Drainage Area q 6.1 ac. (on-site and off-site drainage to the basin)
Impervious Area 02.0. S ac. (on-site and off-site drainage to the basin)
Permanent Pool Volume 3"1- 63 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume "7-19 H:5? cu. ft. (volume detained on top of the permanent pool)
Forebay Volume ?,5 A T'-7 cu. ft.
SA/DA used 1.01 (surface area to drainage area ratio)
Diameter of Orifice 14.2-5 in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. Ifa requirement has not been met, attach an explanation of
why.
Applicants Initials
I3Ctl-. - Tile temporary pool controls runoff from the 1 inch storm event.
13r-0ti The basin length to width ratio is greater than 3:1.
_ [il-. The basin side slopes are no steeper than 3:1.
@Cdh A submerged and vegetated perimeter shelf at less than 6:1 is provided.
IaWA Vegetation to the permanent pool elevation is specified.
te.fN An emergency drain is provided to drain the basin.
'p CVti The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
V?ZLFA The temporary pool draws down in 2 to 5 days.
-RCE- The forebay volume is approximately equal to 20% of the total basin volume.
GT Ct%, Sediment storage is provided in the permanent pool.
2?C_V% Access is provided for maintenance.
BCAA, A minimum 30-foot vegetative filter is provided at the outlet.
CCt_1 A site specific operation and maintenance (O&M) plan is provided.
13 UN. A vegetation management/mowing schedule is provided in the O&M plan.
ACA Semi-annual inspections are specified in the O&M plan.
'e?Gw A debris check is specified in the O&M plan to be performed after every storm event.
Q50- A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
t 4t -% A responsible party is designated in the O&M plan.
FORM SWG100 09/97 Page I of 1

DWQ Project
DIVISION OF WATER QUALITY • LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the followin information):
Project Name : s-tt.ec:-
Contact Person: R J , i ( )'? -_?rn Phone Number: (7e;q) SZCf 6 ZrCO
Level Spreader ID:. ?yT?r G?,),x x-rv tA=t4 1= '-L
Level Spreader Length q0 ft. (perpendicular to flow)
Drainage Area ?. ?I ac. (on-site and off-site drainage to the level spreader)
Impervious Area ?.?.5 ac. (on-site and off-site drainage to the level spreader)
Maximum Filter Strip/Buffer Slope S , Ll % (6% for forested, leaf littler cover, 8% for thick ground cover)*
grass
Max. Discharge from a 10 Year Storm cfs
Max. Discharge to Level Spreader cfs
Filter Strip/Buffer Vegetation Fnc? ?,-? eal >rrjx+t1-
(thick ground cover or grass, canopied forest with leaf litter
groundcover)
Pre-treatment or Bypass Method"
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Aoolicants Initials
('?tlh Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest with leaf
litter.
Cc? Pre-Form Scour Holes are on flat slopes only
No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
N Bypass method is specified (if applicable) and plan details and calculations are provided
Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
P' No structures are located in protected buffers.
Al 14 Plan details for the bypass and outlets are provided.
1J 11% The operation and maintenance agreement includes annual erosion and vegetation repair.
J? Pr The operation and maintenance agreement signed and notarized by the responsible party is provided.
* Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the Draft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area.
NOF WATFR p Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
r
o a?
Alan W. Klimek, P.E. Director
r-- -ray Division of Water Quality
April 7, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed High School. The following additional information is needed to enable us continue with the
reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• The ponds are to meet the requirements of DENR's BMP manual, and 85% TSS removal for all
runoffs.
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
• Clarification of the project actual area from the original 85 acres that was proposed.
• A summary of the present project states, status, activities, current impacts area amounts, and streams
impacts if any vs original stage at the initial application request.
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
S Eincerely
/r
CYndi B. KarolY y??ii''
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 4-7-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet http:--1h2o.encstate.nc.us nc Aetlands
N nc Carolina
d atura!!y
An Equal Opportunity/Affirmative Action Employer - 50% Recycledl10% Post Consumer Paper
TURNBULL o SIGMON DESIGN
(0-17
V,
Land
Development
Design Services
January 11, 2005, rev. 4/21/05
Mr. Mike Higgins
Construction Management Services
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
03055 - Mallard Creek High School
Storm Water Quality
Mr. Higgins:
The Mallard Creek High School project shall be designed to correspond with the existing drainage
characteristics for the site. Currently, the entire site drains to Stoney Creek. The proposed grading of the
high school and park site will be separated into two main drainage basins, drainage basin #1 and drainage
basin #2 respectively. It should be noted that Stoney Creek is a regulated floodway for a portion of our site;
therefore, storm water detention requirements will be waived for the project from local governing agencies by
providing permanent storm water detention easements to the regulated portion. Due to the high amount of
impervious areas associated with the development of a new high school, a water quality basin will be
provided for drains a basin #1. This water quality device will be designed for the removal of 85% of the total
suspended solids and convey t e storm water outfall via level spreader to Stoney Creek. An existing 35'
SWIM buffer currently exists along Stoney Creek and will be adhered to per Mecklenburg County
Ordinances. This SWIM buffer will further assist water quality by providing an additional level of treatment as
a filter strip between the level spreader and Stoney Creek.
Drainage basin #2 is associated with the athletic fields across Bingham Drive. The total impervious area for
this basin is 9.8% of the drainage area. As a result, no water quality treatment basin will be provided.
However, the existing 35' SWIM buffer will provide some level of treatment as a filter strip for the basin.
Please call should you have any questions or need to discuss the aforementioned information.
In summation, the overall storm water quality management plan for the proposed development will
incorporate a water Quality basin for the hi amount of impervious area associated with the school site,
designed for 85% TSS removal, level spreader and 35' SWIM buffers in an effort to remove a majority of the
potential toxins prior to entering the waters of Stoney Creek.
Sean T. Calloway, PE
Principal
cc: Craig Norsted, AIA - LS3P
Brian Sigmon, RLA - TSD
E. Carr Mumford, RLA - TSD
Mike lagnocco - RWA
1001 Morehead Square Drive
Suite 530
Charlotte, NC 28203
Phone: [phone]
Fax: [phone]
turnhullsigmon.com
04-IS30
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
151 PATTON AVENUE
ROOM 208
ASHEVILLE, NORTH CAROLINA 28801-5006
REPLY TO
ATTENTION OF:
Regulatory Division
Action ID. 200430232
April 4, 2005
APR 1 1 zoos
Charlotte-Mecklenburg Board of Education
Mr. Mike Higgins
3301 Stafford Drive
Charlotte, NC 28208
Dear Mr. Higgins:

l'.cTll? 3D u QUALITY
TO,;, 'u,"
In accordance with your written request of September 13, 2004, and the ensuing
administrative record, enclosed are two copies of a permit to construct the Mallard Creek High
School, on Johston-Oehler Road, in Charlotte, Mecklenburg County, North Carolina.
You should acknowledge that you accept the terms and conditions of the enclosed permit
by signing and dating each copy in the spaces provided ("Permittee" on page 3). Your signature,
as permittee, indicates that, as consideration for the issuance of this permit, you voluntarily
accept and agree to comply with all of the terms and conditions of this permit. All pages of both
copies of the signed permit with drawings should then be returned to this office for final
authorization. A self-addressed envelope is enclosed for your convenience.
Title 33, Part 325.1(f ), of the Code of Federal Regulations reads, in part, that, "A $10 fee
will be charged for permit applications when the work is noncommercial in nature and provides
personal benefits that have no connection with a commercial enterprise...", and "A fee of $100
will be charged for permit applications when the planned or ultimate purpose of the project is
commercial or industrial in nature and is in support of operations that charge for the production,
distribution, or sale of goods or services." As your application fits the former category, you are
requested to remit your check for $10.00, made payable to the Finance and Accounting Officer,
USAED, Wilmington. The check should accompany the signed and dated copies of your permit.
In addition, I have enclosed a copy of the Notification of Administrative Appeal Process
and Options and Request for Appeal. Please carefully read Section "A" of this form for
information regarding the appeal process for proffered permits.
TURNBULL o SIGMON DESIGN
p{TC 9?
TO:
Cyndi Karoly
NCDENR - DWQ/Wetlands/401 Cert. Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, NC 27604-2260
TEL: [phone]
DATE: April 28, 2005
REFERENCE: 03055 - Mallard Creek
High School
TRANSMITTED VIA:
? COURIER
? MAIL
® OVERNIGHT
? BYHAND
ACTION:
® FOR APPROVAL
? FOR YOUR USE
? AS REQUESTED
? FOR REVIEW, IND COMMENT
? APPROVED AS SUBMITTED
? APPROVED AS NOTED
? RETURNED FOR CORRECTIONS
CC:
Brian Sigmon, RLA - TSD
E. Carr Mumford, RLA - TSD
WE ARE SENDING: APR 2 J 2005
O&JI - WA ER W.LITY
Z ATTACHED ? UNDER,S(U..J9ATJS(Ca.'K iRt:R BRAIXii
ITEM DATE DESCRIPTION
2 4/21/05 Stormwater Management Application (one original,
one co
2 4/21/05 401 Wet Detention Worksheet (one original, one
copy)
2 4/21/05 Calculations (wet detention basin)
2 4/21/05 Overall Stormwater Management Plan
2 4/21/05 Stormwater Treatment Narrative

COMMENTS:
Cyndi,
Attached is the revised water quality plans for Mallard Creek High School.
Currently no construction has take place on this project. We have
approval of the 401 Permit and Sediment and Erosion Control approval for
the site. Construction is set to begin once NCDENR approves the attached
storm water management plan.
Please call if you have any question or require additional information to
assist with your review.
Bryan C. Metzler, E ?N 7Op
Princi al p APR 2 2005
1'P?11AttiD$ nl;D S I Grti„'.'uil C;t C?7 'eGli
Land 1001 Mforehead Square Drive Phone: [phone]
Development Suite530 Fax: [phone] TRANSMITTAL
Design Services Charlotte, NC 28203 turn hullsigmon.com
OFFICE USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality o ? 1-r- 1 in t ?
Lj
STORMWATER MANAGEMENT PERMIT APPLICATION FOInW?
This form maybe photocopied for use as an original _Nl'? y '
I. GENERAL INFORMATION
dFr?? - vrar?,.
li?l.fJ i.?? /J,D STGiir;" ? ;r;+. art t,? v d r„u
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
C,N?at..arcc M?uc.l.>rN ?. Se_ AML 5
2. Print Owner/SigningOfficial's name and title (person legally responsible for facility and compliance):
Nr4violsiq //
If
3. Mailing Address for person listed in item 2 above:
`x101 STK1 FFORCE pwzye
City: C_NaR-L 0 TV C- state: N ?- zip: 287-08
Telephone Number: LqB? ) 3?? 6
9. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and mainten'an'ce agreements, etc.):
5. Location of Project (street address):
? 11 NSTo t!1 CF,&eR. ?--oiat>
City: C.NAttt- E County: MaC,%LLeN 13VP C-
6. Directions to project (from nearest major intersection):
N TgSTCH
d Er NL? Yz,
7. Latitude: Longitude: of project
8. Contact person who can answer questions about the project:
Name: *
?ezY??µ I'\ G'C`zZ1 E Telephone Number: ( 7 )`?-Ii$d?
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal Modification
Form SW U-101 Version 3.99 Page 1 of 4
2. If this application is being submitte as the result of a renewal or modification to an existing permit, list the
existing permit number A and its issue date (if known) ?y frA
3. Specify the type of project (c eck one):
Low Density High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
?CAMA Major _?/_Sedlmentation/Erosion Control /404/401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project .
'oTwL_ tGi_ = 240.8 mac. -s> cit i_ Qt?04C AC
ONO
1?l wszsi la-?
`TO 854'0 'MS gVitV V t (See- A?1T 44e-qF-Z)
2. Stormwater runoff from this project drains to the River basin.
3. Total Project Area, 114.2i acres 4. Project Built Upon Area: 7_1-E> %
C,-IS-0 qc.
5. How many drainage areas does the project have?
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the Information for each area provided in the same format as below.
Basin Information Drainage Area 1 _ Drainage Area 2
Receiving Stream Name O1„1 C- -ro1y C-•R£
Receiving Stream Class L ?..
Drainage Area
C..
L4 A.,
'3 Iq
Existing Impervious* Area i G
Proposed Impervious*Area .d 04 . 3 Q. Jak-C.
% Impervious` Area (total) 4 1. O o?
Impervious' Surface Area Drainage Area 1. Drainage Area 2
On-site Buildings 0 j-4„ SP 325 SF
On-site Streets
On-site Parking '3 tl SF' at5 3
On-site Sidewalks 2, ?S S 1 S r l e{t -S F
Other on-site p 247 $ 45P
Off-site
Total: $2. , 6 S F Total: 2, 1$ P5 S F
Impervious area is dellncd as the built upon area including, but not limited to, buildings, roads, parking areas,
sldewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of4
7. How was the off-site impervious area listed above derived?
IV.. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built-upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
N/A Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be Illled In, piped, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparccls or future development shall be directed Into the permitted stormwater control
system, These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Pagc 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form S 01A
• One copy of the applicable Supplement Form(s) for each BMP T3t-0-1
• Permit application processing fee of $420 (payable to NCDENR) e„cnL
• Detailed narrative description of stormwater treatment/management (3G.YA
• Two copies of plans and specifications, including: %CON
- Development/Project name
-,Engineer and firm
Legend
North arrow
Scale
Revision number & date
Mean high water line
- Dimensioned property/project boundary
Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another Individual or firm so that they may provide Information on your
behalf, please complete this section.
Designated agent (individual or Arm):
Mailing Address: Joni Kom
lZ , Svrt?rz 530
City:/' State: Zip: 7.13 '43
Phone: Fax: (-,-4Lf ) 5?-Z+ -08G2
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2)
certify that the information included on this permit a lication form Is, to the best of my knowledge, correct and
that the project will be constructed in confor with the approved plans, that the required deed restrictions
and protective covenants will be recorded. n at the proposed project complies with the requirements of 15A
NCAC 2H.1000.
Signature: Date; iv?
Form SWU-101 Version 3.99 Page 4 of 4
TURNBULL © SIGMON DESIGN (0'717
January 11, 2005, rev. 4/21/05
Mr. Mike Higgins
Construction Management Services
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC 28208
03055 - Mallard Creek High School
Storm Water Quality
Mr. Higgins:
The Mallard Creek High School project shall be designed to correspond with the existing drainage
characteristics for the site. Currently, the entire site drains to Stoney Creek. The proposed grading of the
high school and park site will be separated into two main drainage basins, drainage basin #1 and drainage
basin #2, respectively. It should be noted that Stoney Creek is a regulated floodway for a portion of our site;
therefore, storm water detention requirements will be waived for the project from local governing agencies by
providing permanent storm water detention easements to the regulated portion. Due to the high amount of
impervious areas associated with the development of a new high school, a water quality basin will be
provided for drainage basin #1. This water quality device will be designed for the removal of 85% of the total
suspended solids and convey the storm water outfall via level spreader to Stoney Creek. An existing 35'
SWIM buffer currently exists along Stoney Creek and will be adhered to per Mecklenburg County
Ordinances. This SWIM buffer will further assist water quality by providing an additional level of treatment as
a filter strip between the level spreader and Stoney Creek.
Drainage basin #2 is associated with the athletic fields across Bingham Drive. The total impervious area for
this basin is 9.8% of the drainage area. As a result, no water quality treatment basin will be provided.
However, the existing 35' SWIM buffer will provide some level of treatment as a filter strip for the basin.
In summation, the overall storm water quality management plan for the proposed development will
incorporate a water quality basin for the high amount of impervious area associated with the school site,
designed for 85% TSS removal, level spreader and 35' SWIM buffers in an effort to remove a majority of the
potential toxins prior to entering the waters of Stoney Creek.
Please call should you have any questions or need to discuss the aforementioned information.
Sean T. Calloway, PE
Principal
cc: Craig Norsted, AIA - LS3P
Brian Sigmon, RLA - TSD
E. Carr Mumford, RLA - TSD
Mike lagnocco - RWA
Land Tool Morehead Square Drive
Development Suite 530
Design Services Charlotte, NC 28203
Phone: [phone]
Fax: 704-522-o882
turnhullsi5mon.com
?0F WATF9p Michael F. Easley, Governor
? ^ G William G. Ross Jr., Secretary
0 Ti North Carolina Department of Environment and Natural Resources
>
nu
Alan W. Klimck, P.E. Director
Division of Water Quality
May 25, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP# 1, surface area, temporary pool, orifice diameter, and the draw down did not meet requirements.
• Possible mitigation plans if any.
• A summary of the project, current impacts area amounts, Buffers impacts, and streams impacts.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 5-25-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us'ncwetlands
One
iCarolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
'r
` 1 c-) r-
r
TURNBULL SIGMON DESIGN
loos Morehead Square Drive
Suite 530
Charlotte, North Carolina 28203
Phone: [phone]
Fax: [phone]
Mallard. Creek High School
Project No: 03055
CALCULATIONS FOR:
Water Quality Basin
DATE:
REV:
December 6, 2004
April 21, 2005
SEALS c
028314
'` r ry
Mallard Creek Hi School Turnbull Simon Design
y
JOB NO.: 030,55 BY: BC111 iooi Morehead Square Dr., Suite 530 ?
DATE: 1216104 P.M.: ECnr Charlotte, North Carolina 28203
REVISED: 4121105 WATER Q UAL= BASIN DESIGN
WATER QUALITYREQUIREMENTS FOR BASIN #1
To meet the Water Quality requirements, the procedure outlined in the "Stormwater Best
Management Practices" published by NCDENR will be used. This guide gives the
required pond surface area and storage volume to meet an 85% pollutant removal
efficiency. Also, the pond must detain the first 1" of rainfall and release this volume
over a period of 2 to 5 days. Calculations for these requirements are as follows:
Surface area reauirements
Drainage area to pond (Da)= 46.05 Ac
Post-development impervious percentage = 42%
Average pool depth = 6 ft
Designed permanent pool elevation = 726
From table 1.1 in the BMP guidelines the required Surface Area to Drainage Area
Ratio (SA/DA) for a permanent pool depth of 4 feet = 1.09
Required surface area = SA/DA / 100 x Drainage area=
Surface area of pond as designed at permanent pool elevation =
"rainfall requirements
Using the runoff volume calculations in the "Simple Method"
Rv = 0.05 +.009 (1)
Rv= 0.428 in/in
Volume = (Design rainfall) (Rv) (Drainage Area)
Volume = 1" rainfall x Rv in/in x 1/12 in/ft x Da =
0.50 Ac
0.51 Ac
1.64 ac-ft
or 71545 ft^3
°o PERAL1NENT POOL DEPTH
Impervious 3 4 5 6 7 8 9
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
12 0.67 0.55 0.48 0.4 0.35 0.32 0.3
20 0.97 0.79 0.7 0.59 0.51 0.46 0.44
25 1.6 0.94 0.84 0.72 0.61 0.55 0.53
30 1.34 1.08 0.97 0.85 0.7 0.64 0.62
38 1.65 1.36 1.19 0.99 0.86 0.78 0.74
40 1.73 1.43 1.25 1.03 0.9 0.82 0.77
45 1.87 1.58 1.38 1.18 1 0.91 0.85
50 2 1.73 1.5 1.33 1.09 1 0.92
55 2.2 1.88 1.58 1.42 1.19 1.09 1.01
60 2.39 2.03 1.66 1.51 1.29 1.17 1.1
65 2.57 2.15 1.81 1.65 1.39 1.26 1.2
70 2.75 2.27 1.96 1.79. 1.48 1.35 1.29
72 2.82 2.32 2.02 1.85 1.52 1.39 1.33
75 3.04 2.39 2.11 1.93 1.58 1.44 1.39
80 3.25 2.51 2.26 2.07 1.67 1.53 1.48
85 3.47 2.63 2.41 2.21 1.77 1.62 1.58
50 3.68 2.75 2.56 2.35 1.86 1.71 1.67
This volume must be released over a period of 2-5 days
Mallard Creek Hi School Turnbull Simon Design
rr
JOB NO.: 03055 BY: BCaI iooi Morehead Square Dr., Suite 530
7 1&
Q
DATE: 1216104 P.M.: ECaI Charlotte, North Carolina 28203
REVISED: 4121105 WATER UALITYBASIN DESIGN
't-?-
WATER QUALITYBASIN *1 MODEL
iValer ualihr Basin Storage VoILunes
Elevation j Area
(msl) (so Area
(ac) r Volume
(cu-ft) Volume
(ac-ft)
720 i 5703 0.1309 0 0.0000
721 9152 0.2101 7352 0.1688
722 10506 j 0.2412 17164 0.3940
723 11937 i 0.2740 28367 0.6512
724 13446 10.3087 41038 0.9421
725 15028 0.3450 55253 1.2684
726 22264 0.5111 j 73763 1.6934
727 24165 0.5548 96947 2.2256
728 26134 1 0.6000 122065 2.8022
729 28180 j 0.6469 149189 3.4249
Forebay Storage Volumes (21.z%)
Elevation i
(msl) Area
(so Area
(ac) , Volume
(cu-ft) ! Volume
(ac-ft)
721 2711 ( 0.0622 1 0 0.0000
722 3288 0.0755 2992 0.0687
723 3903 0.0896 i 6579 0.1510
724 4556 0.1046 10800 ! 0.2479
725 5245 1 0.1204 15692 0.3602

Storage Volumes
Elevation
(msl) Area
(ac) Volume
i (ac-ft)
726 0.5111 0.00
727 0.5548 0.53
728 0.6000 1.11
729 0.6469 j 1.73

? I
i

Elevation Interpolation
Elev Stora e Area Storage Area
728
Elev
729 1.1089
1.6425
1.7315 26134
27887
28180
Stora a elevation = 2.86 ft. above permanent pool elev.
Stora e elevation = 728.86
Determination of High Water Elevation
Q=3.331h^3/2
Q= 10 yr. storm runoff 194.00 cfs
1= weir length 24.00 ft
h= elevation over weir h ft
h= (Q/3.33 X I)^2/3
h= 1.80619
Elevation 730.66
Determination ofEmergencil SpilhvaJ Size 730.75
Q=3.331h^312
Q= 100 yr. storm runoff 275.00 cfs
1= weir length I ft
h= elevation over weir 1.25 ft
1= Q/(3.33 x 11312)
Length 59.09
Mallard Creels High Sehool Turnbull Sigmon Design ,
JOB NO.: 0,30.55 BY: BCar cool Morehead Square Dr., Suite 530 . p
DATE: 1216104 P.M.: ECM Charlotte, North Carolina 28203
!x
REVD: 4121105 FLOATATION CALCULATIONS
Calculations Given Data Standard Footing Assuan tions
Buoyant Weight of Concrete 87.6 Ibs/f A3 _ 1. Footing base to be 1 ft. wider than structure
Weight of Water 62.4 Ibs/ft^3 on all sides.
Safe Factor S.F 1.25 2. Footin depth to be a minimum of 8 inches in depth.
Equations used :
Outlet Structure Weight, W(s) = 4(w + t) x t x h x W(bc)
where, w = outlet box inside dimension, ft.
Displaced Water Weight, W(w) = 4 x (w + 21) x W(w) x h t = structure wall thickness, ft.
h = height of structure, ft.
Required Base Weight, W(b) = (W(w) x S.F.) - W(s) W(bc)= buoyant weight of concrete, Ibs/ft^3
W(w) = weight of water, Ibs/ft^3
Required Footing Volume, V(0 = W(b) / W(bc) S.F.= safety factor
ut et t7*uctw•e #1
Structure Dinterssions Object Wei his
Height of structure, h = 9 ft. Outlet Structure Weight, W(s) _ 10249 lbs
Structure wall thickness, t = 6 in. Displaced Water Weight, W(w) 15724.8 Ibs
Outlet box inside dimension, w = 6 ft. Re 'd Base Weight, W(b) = 9407 Ibs
Fooling Size
Required Footing Volume, V(t) _ 107 cf_ Standard Footing Length, L 9.00 ft.
Provided Footing Volume, V(t) = 162 cf Standard Footing Width, W 9.00 ft.
Footing Check oka Minimum Footing Depth, D = 1.68 ft.
Footing Size to be used. Length= 9.00 ft.
Width = 9.00 ft. Outlet Structure #1
Depth = 2.00 ft.
Mallard Creek Hi Sehool Turnbull Sigmon Design
JOB NO.: 03055 BY: BCn1 tool Morehead Square Dr., Suite 530 F

DATE: 1216104 P.M.: EC51 Charlotte, North Carolina 28203 a
..A fx
REVISED: 4121/o5 STORM DRAINAGE D ESIGN DATA
LOCATION DRAIN RUNOFF PIPE TRAVELTIDIE INVERT ELEV. PIPE DEPTIT
AREA IROUNDED FULL DELTA TOTAL (FROM) (FROM)
FROM TO C 1 I Q inlet ' Q pipe n SLOPE LENGTW SIZE SIZE VEL. "T" "T" _
INV INV -INV RI'.i COVER
(acre) (cfs) (cfs) (fUft) (ft) i(inches) (inches) (fps) (min) (min) OUT IN OUT ELEVATION DEPTH
OS#127 HW#128 46.05
I
0.60 7.03 194.2 0.013 1 0.010 43 53.7 54 12.2 1 0.06 0.06 719.80 719.37

I
I I I
I
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it

I

i
I

_ I I

I
L

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I
II

i

ID 03-055 Mallard creek High School
ID
ID
ID Charlotte North Carolina
ID Basin A - Routed
ID TURNBULL SIGMON DESIGN
ID 4/21/05
IT 5 0 0 2000
IO 4
KKDrawdown
RS 1 ELEV 728.86
SA0.3450 0.5111 0.5548 0.6000 0.6469
SE725.00 726.00 727.00 728.00 729.00
SL726.18 0.098 0.6 0.5
SS999.00 0.000 3 1.5
KO 21
ZZ
Drawdown.ihl
Page 1
Drawdo (CFS)
0.9 -
0.8
0.7
ci 0.6 --------
Drawdo (CFS)
0.4
M 0.3 _------ - -- -- - --- -
0.2
0.1 -7, IDM5
0
0 2000 4000 6000
Time (min)
Time (Minutes), Drawdo (us),
5, .772,
10, .769,
15, .768,
20, .766,
25, .765,
30, .764,
35, .763,
40, .761,
45, .76,
50, .759,
55, .758,
60, .756,
65, .755,
70, .754,
75, .7S3,
80, .751,
85, .75,
90, .749,
95, .748,
100, .747,
105, .745,
110, .744,
115, .743,
120, .742,
125, .74,
130, .739,
135, .738,
140, .737,
145, .735,
150, .734,
155, .733,
160, .732,
165, .731,
170, .729,
175, .728,
180, .727,
185, .726,
190, .725,
195, .723,
200, .722,
205, .721,
210, .72,
215, .719,
220, .717,
225, .716,
230, .715,
235, .714,
240, .713,
245, .712,
250, .71,
255, .709,
260, .708,
265, .707,
270, .706,
27S, .705,
280, .703,
285, .702,
290, .701,
295, .7,
300, .699,
305, .698,
310, .696,
315, .695,
320, .694,
325, .693,
330, .692,
335, .691,
340, .69,
345, .688,
350, .687,
355, .686,
360, .685,
365, .684,
370, .683,
375, .682,
380, .68,
385, .679,
390, .678,
395, .677,
400, .675,
405, .674,
410, .673,
415, .671,
420, .67,
425, .669,
430, .668,
43S, .666,
440, .665,
TIME.TXT
Page 1
445, .664,
450, .662,
455, .661,
460, .66,
465, .659,
470, .657,
475, .656,
480, .655,
485, .654,
490, .652,
495, .651,
S00, .65,
505, .649,
510, .647,
515, .646,
520, .645,
525, .644,
530, .642,
535, .641,
540, .64,
54S, .639,
550, .638,
555, .636,
560, .635,
565, .633,
570, .632,
575, .63,
580, .629,
585, .627,
590, .626,
595, .624,
600, .623,
605, .621,
610, .62,
615, .618,
620, .617,
625, .615,
630, .614,
635, .612,
640, .611,
645, .61,
650, .608,
655, .607,
660, .605,
665, .604,
670, .602,
675, .601,
680, .599,
685, .598,
690, .597,
695, .59S,
700, .594,
705, .592,
710, .591,
715, .589,
720, .588,
725, .587,
730, .585,
735, .584,
740, .582,
745, .581,
750, .58,
75S, .578,
760, .577,
765, .576,
770, .574,
775, .573,
780, .571,
785, .57,
790, .569,
795, .567,
800, .566,
805, S65,
810, .563,
815, .562,
820, .561,
825, .559,
830, .558,
835, .557,
840, .555,
845, .554,
850, S53,
855, .551,
860, .55,
865, .549,
870, .547,
875, .546,
880, .545,
885, .544,
890, .542,
895, .541,
Page 2
TIME.TXT
900, .54,
905, .538,
910, .537,
915, .536,
920, .534,
925, .533,
930, .532,
935, .531,
940, .529,
945, .528,
950, .527,
955, .526,
960, .524,
965, .523,
970, .522,
975, .521,
980, .519,
985, .518,
990, .517,
995, .516,
1000, .514,
1005, .513,
1010, .512,
1015, .511,
1020, .51,
1025, .508,
1030, .507,
1035, .506,
1040, .505,
1045, 504,
1050, .502,
1055, .501,
1060, .5,
1065, .499,
1070, .498,
1075, .496,
1080, .495,
1085, .494,
1090, .493,
1095, .492,
1100, .49,
1105, .489,
1110, .488,
1115, .487,
1120, .486,
1125, .485,
1130, .483,
1135, .482,
1140, .481,
1145, .48,
1150, .479,
1155, .478,
1160, .477,
1165, .475,
1170, .474,
1175, .473,
1180, .472,
1185, .471,
1190, .47,
1195, .469,
1200, .468,
1205, .466,
1210, .465,
1215, .463,
1220, .462,
1225, .46,
1230, .459,
1235, .458,
1240, .456,
1245, .455,
1250, .453,
1255, .452,
1260, .451,
1265, .449,
1270, .448,
1275, .447,
1280, .445,
1285, .444,
1290, .442,
1295, .441,
1300, .44,
1305, .438,
1310, .437,
1315, .436,
1320, .434,
1325, .433,
1330, .432,
1335, .43,
1340, .429,
1345, .428,
1350, .426,
Page 3
TIME.TXT
1355, .425,
1360, .423,
1365, .422,
1370, .42,
1375, .419,
1380, .417,
1385, .416,
1390, .414,
1395, .413,
1400, .411,
1405, .41,
1410, .409,
1415, .407,
1420, .406,
1425, .404,
1430, .403,
1435, .401,
1440, .4,
1445, .398,
1450, .397,
1455, .396,
1460, .394,
1465, .393,
1470, .391,
1475, .39,
1480, .389,
1485, .387,
1490, .386,
1495, .385,
1500, .383,
1505, .382,
1510, .38,
1515, .379,
1520, .378,
1525, 376,
1530, 375,
1535, .374,
1540, .372,
1545, .371,
1550, .37,
1555, .368,
1560, .367,
1565, .366,
1570, .365,
1575, .363,
1580, .362,
1585, .361,
1590, .359,
1595, .358,
1600, .357,
1605, .355,
1610, .354,
1615, .352,
1620, .351,
1625, .349,
1630, .348,
1635, .346,
1640, .345,
1645, .343,
1650, .342,
1655, .34,
1660, .339,
1665, .337,
1670, .336,
1675, .334,
1680, .333,
1685, .331,
1690, .33,
1695, .328,
1700, .327,
1705, .325,
1710, 324,
1715, 323,
1720, .321,
1725, .32,
1730, .318,
1735, .317,
1740, .316,
1745, .314,
1750, .313,
1755, .311,
1760, .31,
1765, .309,
1770, .307,
1775, .306,
1780, .305,
1785, .303,
1790, .302,
1795, .301,
1800, .299,
1805, .298,
TIME.TXT
Page 4
1810, .297,
1815, .295,
1820, .294,
1825, .293,
1830, .291,
1835, .29,
1840, .289,
1845, .288,
1850, .286,
1855, .285,
1860, .283,
1865, .281,
1870, .28,
1875, .278,
1880, .277,
1885, .275,
1890, .274,
1895, .272,
1900, .271,
1905, .269,
1910, .268,
1915, .267,
1920, .265,
1925, .264,
1930, .262,
1935, .261,
1940, .259,
1945, .258,
1950, .257,
1955, .255,
1960, .254,
1965, .252,
1970, .251,
1975, .25,
1980, .248,
1985, .247,
1990, .246,
1995, .244,
2000, .243,
2005, .242,
2010, .24,
2015, .239,
2020, .237,
2025, .236,
2030, .234,
2035, .233,
2040, .231,
2045, .23,
2050, .228,
2055, .227,
2060, .225,
2065, .224,
2070, .222,
2075, .221,
2080, .219,
2085, .218,
2090, .217,
2095, .215,
2100, .214,
2105, .212,
2110, .211,
2115, .21,
2120, .208,
2125, .207,
2130, .204,
2135, .201,
2140, .198,
2145, .195,
2150, .192,
2155, .19,
2160, .187,
2165, .184,
2170, .182,
2175, .179,
2180, .177,
2185, .174,
2190, .172,
2195, .17,
2200, .167,
2205, .165,
2210, .162,
2215, .16,
2220, .158,
2225, 1S6,
2230, .154,
2235, .151,
2240, .149,
2245, .147,
2250, .14S,
2255, .143,
2260, .141,
TIME.TXT
Page 5
2265, .139,
2270, .137,
2275, .135,
2280, .133,
2285, .131,
2290, .13,
2295, .128,
2300, .126,
2305, .124,
2310, .123,
2315, .121,
2320, .119,
2325, .117,
2330, .116,
2335, .114,
2340, .113,
2345, .111,
2350, .109,
2355, .108,
2360, .106,
2365, .105,
2370, .103,
2375, .102,
2380, .101,
2385, .099,
2390, .098,
2395, .096,
2400, .095,
2405, .094,
2410, .092,
2415, .091,
2420, .09,
2425, .089,
2430, .087,
2435, .086,
2440, .085,
2445, .084,
2450, .083,
2455, .081,
2460, .08,
2465, .079,
2470, .078,
2475, .077,
2480, .076,
2485, .075,
2490, .074,
2495, .073,
2500, .072,
2505, .071,
2510, .07,
2515, .069,
2520, .068,
2525, .067,
2530, .066,
2535, .065,
2540, .064,
2545, .063,
2550, .062,
2555, .061,
2560, .061,
2565, .06,
2570, .059,
2575, .058,
2580, .057,
2585, .056,
2590, .056,
2595, .055,
2600, .054,
2605, .053,
2610, .053,
2615, .052,
2620, .051,
2625, .05,
2630, .05,
2635, .049,
2640, .048,
2645, .048,
2650, .047,
2655, .046,
2660, .046,
2665, .045,
2670, .044,
2675, .044,
2680, .043,
2685, .043,
2690, .042,
2695, .041,
2700, .041,
2705, .04,
2710, .04,
2715, .039,
Page 6
TIME. TXT
2720, .039,
2725, .038,
2730, .037,
2735, .037,
2740, .036,
2745, .036,
2750, .035,
2755, .035,
2760, .034,
2765, .034,
2770, .033,
2775, .033,
2780, .033,
2785, .032,
2790, .032,
2795, .031,
2800, .031,
2805, .03,
2810, .03,
2815, .029,
2820, .029,
2825, .029,
2830, .028,
2835, .028,
2840, .027,
2845, .027,
2850, .027,
2855, .026,
2860, .026,
2865, .026,
2870, .025,
2875, .025,
2880, .025,
2885, .024,
2890, .024,
2895, .024,
2900, .023,
2905, .023,
2910, .023,
2915, .022,
2920, .022,
2925, .022,
2930, .021,
2935, .021,
2940, .021,
2945, .02,
2950, .02,
2955, .02,
2960, .02,
2965, .019,
2970, .019,
2975, .019,
2980, .019,
2985, .018,
2990, .018,
2995, .018,
3000, .017,
3005, .017,
3010, .017,
3015, .017,
3020, .017,
3025, .016,
3030, .016,
3035, .016,
3040, .016,
3045, .015,
3050, .015,
3055, .015,
3060, .015,
3065, .015,
3070, .014,
3075, .014,
3080, .014,
3085, .014,
3090, .014,
3095, .013,
3100, .013,
3105, .013,
3110, .013,
3115, .013,
3120, .012,
3125, .012,
3130, .012,
3135, .012,
3140, .012,
3145, .012,
3150, .011,
3155, .011,
3160, .011,
3165, .011,
3170, .011,
TIME.TXT
Page 7
3175, .011,
3180, .011,
3185, .01,
3190, .01,
3195, .01,
3200, .01,
3205, .01,
3210, .01,
3215, .01,
3220, .009,
3225, .009,
3230, .009,
3235, .009,
3240, .009,
3245, .009,
3250, .009,
3255, .009,
3260, .008,
3265, .008,
3270, .008,
3275, .008,
3280, .008,
3285, .008,
3290, .008,
3295, .008,
3300, .007,
3305, .007,
3310, .007,
3315, .007,
3320, .007,
3325, .007,
3330, .007,
3335, .007,
3340, .007,
3345, .007,
3350, .007,
3355, .006,
3360, .006,
3365, 006,
3370, .006,
3375, .006,
3380, .006,
3385, .006,
3390, .006,
3395, .006,
3400, .006,
3405, .006,
3410, .005,
3415, .005,
3420, .005,
3425, .005,
3430, .005,
3435, .005,
3440, .005,
3445, .005,
3450, .005,
3455, .005,
3460, .005,
3465, .005,
3470, .005,
3475, .005,
3480, .005,
3485, .004,
3490, .004,
3495, .004,
3500, .004,
3505, .004,
3510, .004,
3515, .004,
3520, .004,
3525, .004,
3530, .004,
3535, .004,
3540, .004,
3545, .004,
3550, .004,
3555, .004,
3560, .004,
3565, .004,
3570, .004,
3575, .003,
3580, .003,
3585, .003,
3590, .003,
3595, .003,
3600, .003,
3605, .003,
3610, .003,
3615, .003,
3620, .003,
3625, .003,
Page 8
TIME.TXT
3630, .003,
3635, .003,
3640, .003,
3645, .003,
3650, .003,
3655, .003,
3660, .003,
3665, .003,
3670, .003,
3675, .003,
3680, .003,
3685, .003,
3690, .002,
3695, .002,
3700, .002,
3705, .002,
3710, .002,
3715, .002,
3720, .002,
3725, .002,
3730, .002,
3735, .002,
3740, .002,
3745, .002,
3750, .002,
3755, .002,
3760, .002,
3765, .002,
3770, .002,
3775, .002,
3780, .002,
3785, .002,
3790, .002,
3795, .002,
3800, .002,
3805, .002,
3810, .002,
3815, .002,
3820, .002,
3825, .002,
3830, .002,
3835, .002,
3840, .002,
3845, .002,
3850, .002,
3855, .002,
3860, .002,
3865, .002,
3870, .002,
3875, .001,
3880, .001,
3885, .001,
3890, .001,
3895, .001,
3900, .001,
3905, .001,
3910, .001,
3915, .001,
3920, .001,
3925, .001,
3930, .001,
3935, .001,
3940, .001,
3945, .001,
3950, .001,
3955, .001,
3960, .001,
3965, .001,
3970, .001,
3975, .001,
3980, .001,
3985, .001,
3990, .001,
3995, .001,
4000, .001,
4005, .001,
4010, .001,
4015, .001,
4020, .001,
4025, .001,
4030, .001,
4035, .001,
4040, .001,
4045, .001,
4050, .001,
4055, .001,
4060, .001,
4065, .001,
4070, .001,
4075, .001,
4080, .001,
Page 9
TIME.TXT
4085, .001,
4090, .001,
4095, .001,
4100, .001,
4105, .001,
4110, .001,
4115, .001,
4120, .001,
4125, .001,
4130, .001,
4135, .001,
4140, .001,
4145, .001,
4150, .001,
4155, .001,
4160, .001,
4165, .001,
4170, .001,
4175, .001,
4180, .001,
4185, .001,
4190, .001,
4195, .001,
4200, .001,
4205, .001,
4210, .001,
4215, .001,
4220, .001,
4225, .001,
4230, .001,
4235, .001,
4240, .001,
4245, .001,
4250, .001,
4255, .001,
4260, .001,
4265, 0,
4270, 0,
TIME.TXT
Page 10
W #1 Turnbull Sigmon Design
JOB NO.: 03-055 BY: BC21I iooi Morehead Square Dr., Suite 530 f

DATE: 4120105

T.L.:

Charlotte, North Carolina 28203
f
o ?
FI ,°
REVISED: - P.M.: Detention Calculations „
Riser Dimensions
Riser= 72.0 in square
Thk= 6.o in
Area= 25.00 sgft
Elev= 728.86 ft
Emergency Spillway Dimensions
Length= 59 ft
Elev= 730.35 ft
Outlet Num
Type ID Equation Size Invert Elev Area Coeff. Length Outlets
Orifice 1 Orifice (ft) 0.35 726 726.18 o.o96 o.6 N/A 1
Orifice 2 Orifice (ft) 0 999 999.00 0.000 o.6 N/A o
Riser 3 Weir (ft) 20 - 728.86 -
3.33
zo
1
ES 4 Weir (ft) 59 - 730.35 - 3.1 59 1
Barrel 5 Orifice (ft) 4.5 719.8 722.05 15.8963 o.6 N/A 1

IElevation Head (1)
(ft) Head (2)
(ft) Head (3)
(ft) Head (4)
(ft) 0(1)
(Cfs) Q(2)
(cfs) Q (3) A
(cfs) Q (3) B
(cfs) 0(3)
(Cfs) Q STR
(cfs) Q (4)
(Cfs) Q(5)
(Cfs) Q (total)
(cfs)
720.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
726.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 152.12 0.00
727.00 0.83 0.0 0.0 0.0 0.42 0.00 0.00 0.00 0.00 0.42 0.00 170.29 0.42
728.00 1.83 0.0 0.0 0.0 0.63 0.00 0.00 0.00 0.00 0.63 0.00 186.70 0.63
729.00 2.83 0.0 0.1 0.0 0.78 0.00 3.49 0.00 3.49 4.27 0.00 201.78 4.27
729.67 3.50 0.0 0.8 0.0 0.87 0.00 48.55 0.00 48.55 49.42 0.00 211.28 49.42
730.00 3.83 0.0 1.1 0.0 0.91 0.00 81.06 0.00 81.06 81.97 0.00 215.81 81.97
731.00 4.83 0.0 2.1 0.6 1.02 0.00 208.49 176.09 176.09 177.11 95.85 228.98 272.96
0.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
....
.....................................
• FLOOD HYDROGRAPH PACKAGE (HEC-1)
JUN 1998
• VERSION 4.1
• RUN DATE 21AiR05 TIME 15:08:14
x x xxxxxxx xxxxx x
x x x x x xx
x x x x x
xxxxxxx xxxx x xxxxx x
x x x x x
x x x x x x
x x xxxxxxx xxxxx xxx
1
1
• U.S. AP14Y CORPS OF ENGINEERS `
• HYDROLOGIC ENGINEERING CENTER
• 609 SECOND STREET `
• DAVIS, CALIFORNIA 95616
' [phone]
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECILB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE LEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTPAN77 VERSION
NEW CPTICNS: DIJBREAK OUTFLCW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND A14PT 114FILTRATION
KINEMATIC WAVE: 14EW FINITE DIFFERENCE ALGCRITHM
HEC-1 INPUT PAGE 1
LINE ID. ...... 1....... 2.......3.......4. ......5. ......6 .......7. ......8.. .....9. .....10
1 ID 03-042 Mallard Creek High School
2 ID
3 ID ........................• ..
4 ID
5 ID Charlotte North Carolin a
6 ID WQN1 Basin - Routed
7 ID TURNBULL SIGMON DESIGN
d ID 4/21/05
9 IT 1 0 0 2000
10 IO 5
11 KK Fst-2 Post-DEVELOPED 2YR STORM
12 KT-1 DEVELOP14EIlT BASIN RUNOFF
13 KO 0 0 0 21
14 1,74 2 YEAR 6 HOUR RAINFALL
15 IB 2.28
16 IN 5
17 PI 0.0 0.007 0.007 0.008 0.008 0.008 0.008 0.009 0.009 0.009
18 PI 0.009 0.009 0.010 0.010 0.010 0.011 0.011 0.011 0.012 0.014
19 PI 0.014 0.015 0.016 0.017 0.018 0.021 0.022 0.024 0.026 0.028
20 PI 0.031 0.044 0.050 0.058 0.089 0.115 0.242 0.420 0.166 0.100
21 PI 0.064 0.054 0.047 0.033 0.029 0.027 0.025 0.023 0.021 0.018
22 PI 0.017 0.016 0.016 0.015 0.014 0.012 0.012 0.011 0.011 0.010
23 PI 0.010 0.009 0.009 0.009 0.009 0.'i08 0.008 0.008 0.0D8 0.008
24 PI 0.007 0.007 0.007 0.0
25 BA .0720
26 LS 0 82.00
27 UD .300
. . .....•.... .2yr route. ........a •..•,.
28 KK BASINAROUTED 2YR STORM EVENT
29 104 COMPUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED THROUGH DETE14TIO14 BASIN
30 KO 5 0 0 0 21
31 RS 1 ELEV 720.00
32 SV 0.000 1.6934 2.2256 2.8022 3.4249
33 SE 720.00 726.00 727.00 728.00 729.00
34 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 602.07
35 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
. . ............... 10yr ................•..
36 KK Est-IOPost-DEVELOPED 10YR STORM
37 F04 Post-DEVELOPMENT BASIN RU NOFF
36 KO 21
39 KM 10 YEAR 6 HOUR RAINFALL
40 PB 3.72
41 IN 5
42 PI 0 .011 .011 .011 .012 .012 .012 .013 .013 .013
43 PI .014 .014 .015 .015 .016 .016 .017 .018 .016 .023
44 PI .024 .025 .026 .027 .029 .036 .039 .042 .045 .049
45 PI .054 .079 .089 .103 .161 .201 .395 .590 .275 .177
46 PI .112 .095 .084 .057 .051 .047 .043 .040 .038 .030
47 PI .028 .027 .025 .024 .023 .019 .018 .017 .017 .016
48 PI .016 .015 .015 .014 .014 .013 .013 .012 .012 .012
49 PI .011 .011 .011 0.0
50 BA .0720
HE---l I14PUT PAGE 2
LINE ID....... 1....... 2.......3.......4. ......5.. .....6.......7.......8.. .....9 ......10
51 LS 0 82.00
52 UD .300
. . .................l0yr route******..** ....
53 KK BASINAROUTED 10YR STORM EVENT
54 KM COMPUTE HYDROGRAPH FOR POST-DEVELO PMENT ROUTED TH ROUGH DETENTION BASIN
55 KO 5 0 0 0 21
56 RS 1 ELEV 720.00
57 SV 0.000 1.6934 2.2256 2.8022 3.4249
58 SE 720.00 726.00 727.00 728.00 729.00
59 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 6C2.07
60 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
. . ..... ..a,•........,50yraa•... I........,.•
bl KK Pst-50POSt-DEVELOPED 50YR STORM
62 KM 50 YEAR 6 HOUR RAINFALL
63 KO 21
64 PS 4.92
65 IN 5
66 PI 0 .016 .016 .016 .017 .018 .018 .019 .019 .019
67 PI .020 .020 .021 .022 .022 .023 .024 .025 .026 .031
68 PI .032 .034 .035 .037 .039 .050 .053 .056 .061 .066
69 PI .073 .103 .116 .134 .208 .259 .508 .750 .354 .229
70 PI .146 .124 .109 .077 .069 .063 .059 .055 .051 .040
71 PI .038 .036 .034 .033 .031 .026 .025 .024 .024 .023
72 PI .022 .021 .021 .020 .020 .019 .019 .018 .018 .017
73 PI .017 .016 .016 0.0
74 BA .0720
75 LS 0 82.00
76 UD .300

..,.
. ...............• 50 yr rout ............
a..
77 KK 13AZI14AROUTED 50YR STORM
78 KM COMPUTE HYDROGRAPH FOR POST-DEVELO PMENT ROUTED TH ROUGH DETENTICN BASIN
79 KO 5 0 0 0 21
80 RS 1 ELEV 720.00
61 SV 0.003 1.6934 2.2256 2.8022 3.4249
82 SE 720.00 726.00 727.00 728.00 729.00
63 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 602.07
84 SE 720.03 726.00 727.00 728.00 729.00 730.00 731.00 732.00
. ... a........... 100 yr ................. a a.. .....
85 KK I'ST100POST-DEVELOFED 100YR STORM
86 KM 100 YEAR 6 HOUR RAINFALL
87 rB 5.34
88 IN 5
89 PI .000 .017 .017 .018 .018 .019 .020 .020 .020 .021
90 PI .022 .022 .023 .023 .024 .025 .026 .027 .028 .032
91 PI .034 .035 .037 .039 .041 .053 .056 .060 .065 .071
92 PI .078 .113 .126 .147 .226 .262 .555 .830 .386 .250
93 FI .16D .136 .119 .082 .074 .068 .063 .058 .055 .042
94 PI .040 .038 .036 .034 .033 .029 .027 .026 .025 .025
95 PI .024 .023 .022 .022 .021 .021 .020 .020 .019 .019
96 PI .018 .018 .017 .000
97 BA .0720 '
1 HEC-1 INPUT PAGE 3
LINE ID.. ..... 1....... 2.......3.......4.. .....5.. .....6. ......7. ......8... ....9. .....10
98 LS 0 82.00
99 UD .300
. ..................100yr route..... ........ .......
100 KK BASINAROUTED 100YR STORM
101 KM C014FIUTE HYDROGRAPH FOR POST-DEVELO PMENT ROUTED TH ROUGH DETENTION BASIN
102 KO 5 0 0 0 21
103 RS 1 ELEV 720.00
104 SV 0.000 1.6934 2.2256 2.8022 3.4249
105 SE 720.00 726.00 727.00 728.00 729.00
106 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 602.07
107 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
108 ZZ
1........•a..a ........ . ..... a......... .... a• .....a .....,....••...................
• FLOOD HYDROGRAFH PACKAGE (HEC-3) U.S . RPMY CORPS OF ENGINEERS
• JUN 1998 ` HYDROLOGIC EIdGINEERIIJG CENTER
VERSICN 4.1 809 SECOND STREET
• DAVIS, CALIFCRNIA 95616
• RU14 DATE 21APR05
......,: ............. TIME
........ 15:08:14 •
..•...aa.... '
99
..99.. [phone]
...9.. s ...99,.....9....9......
03-042 Mallard Creek High School
Charlotte North Carolina
WQN1 Basin - Routed
TURN13ULL SIGMCN DESIGN
4/21/05
10 IO OUTPUT CCNTROL VARIABLES
I PRNT 5 PRIIJT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITI14E 0000 STARTING TIME
NQ 2000 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 2 0 ENDING DATE
NDTIME 0919 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 33.32 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE RILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT

11 KK ..............
Pst-2 •
• .............
Fost-DEVELOPED 2YR STORM
13 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCP.L 0. HYDROGRAFH PLOT SCALE
IFNCH 0 PUNCH COMPUTED HYDROGRAPH
ICUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PU14CHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERNAL IN HOURS
30 KO OUTPUT CONTROL VARIABLES
IFRINT 5 PRIIJT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDR.OGRAPH PLOT SCALE
IFNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDRCGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS

36 KK ..............
' Pst-10 •
.............a
Post-DEVELOPED 10YR STORM
38 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IFNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
55 KO OUTPUT CC14TROL VARIABLES
IPR14T 5 FRINT CONTROL
IPLCT 0 PLOT C014TROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IFNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
......

61 KK .................................................
..............
• Pst-50 • Post-DEVELOPED 50YR STORM ...... ........ ....... ......... ..............
53 HO OUTPUT CONTROL VARIABLES
IFRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
ICUT 21 SAVE HYLROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
79 KO OUTPUT CONTROL VARIABLES
IFRNT FRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
102 KO OUTPUT CONTROL VARIABLES
IFRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
1
RUNOFF SUMMARY
FLOW IN CUBIC FEET FER SECOND
TIME IN HOURS, AREA IN SCU ARE MIL ES
FEAK TIME OF AVERAGE FLOW FOR IIIAXIMUM PERIOD BASIN MAXIMUM TIME OF
OFERATICN STATION FLOW PEAK AREA STAGE KU STAGE
+ 6-HOUR 24-HO UR 72-HOUR
HYDROGRAPH AT
+ Pst-2 44. 3.48 7. 2. 1. .07
ROUTED TO
+ BASINA 2. 6.37 1. 1. 0. .07
+ 728.32 6.38
HYDROGRAPH AT
+ Pst-10 103. 3.47 15. 4. 3. .07
ROUTED TO
+ BASINA 56. 3.7B 9. 3. 2. .07
+ 729.67 3.78
HYDROGRAFH AT
+ Pst-50 153. 3.45 23. 6. 4. .07
ROUTED TO
+ BASINA 131. 3.58 17. 5. 3. .07
+ 730.25 3.58
HYLROGRAPH AT
+ PST100 173. 3.45 26. 7. 5. .07
ROUTED TO
+ BASINA 158. 3.55 20. 5. 4. .07
a 730.40 3.55
'•• NORMAL END OF HEC-1 ••.

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4
TURNBULL SIGMON DESIGN
loos Morehead Square Drive
Suite 530
Charlotte, North Carolina 28203
Phone: [phone]
Fax: 704.522.o882
Mallard Creep High School
Project No: 03055
CALCULATIONS FOR:
Water Quality Basin
DATE: December 6, 2004
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REV. April 21, 2005
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_ Mallard, Creek Hi School Turnl- ull Sigmo - Design
JOB NO. 03055 B Y: 13751 iooi Morehead Square Dr., Suite 530
e
77 7! 7
DATE. 1216104 Charlotte, North Carolina 28203
REVISED: 4121105 WATER UALTTYBASSINDESIGN
WATER QUALITYREQUIREMENTS FOR BASIN #I
To meet the Water Quality requirements, the procedure outlined in the "Stormwater Best
Management Practices" published by NCDENR will be used. This guide gives the
required pond surface area and storage volume to meet an 85% pollutant removal
efficiency. Also, the pond must detain the first 1" of rainfall and release this volume
over a period of 2 to 5 days. Calculations for these requirements are as follows:
Surface area requirements
Drainage area to pond (Da)= 46.05 Ac
Post-development impervious percentage = 42%
Average pool depth = 6 ft
Designed permanent pool elevation = 726
From table 1.1 in the BMP guidelines the required Surface Area to Drainage Area
Ratio (SA/DA) for a permanent pool depth of 4 feet = 1.09
Required surface area = SA/DA / 100 x Drainage area=
Surface area of pond as designed at permanent pool elevation =
1"rainfall requirements
Using the runoff volume calculations in the "Simple Method" :
Rv = 0.05 +.009 (1)
Rv= 0.428 in/in
Volume = (Design rainfall) (Rv) (Drainage Area)
Volume = 1" rainfall x Rv in/in x 1/12 in/ft x Da =
0.50 Ac
0.51 Ac
1.64 ac-ft
or 71545 ft"3
% PEl?AL4NENT POOL DEPTH
Impervious 3 4 5 6 7 8 9
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
12 0.67 0.55 0.48 0.4 0.35 0.32 0.3
20 0.97 0.79 0.7 0.59 0.51 0.46 0.44
25 1.6 0.94 0.84 0.72 0.61 0.55 0.53
30 1.34 1.08 0.97 0.85 0.7 0.64 0.62
38 1.65 1.36 1.19 0.99 0.86 0.78 0.74
40 1.73 1.43 1.25 1.03 0.9 0.82 0.77
45 1.87 - 1.58 1.38 1.18 1 0.91 0.85
50 2 1.73 1.5 1.33 1.09 1 0.92
55 2.2 1.88 1.58 1.42 1.19 1.09 1.01
60 2.39 2.03 1.66 1.51 1.29 1.17 1.1
65 2.57 2.15 1.81 1.65 1.39 1.26 1.2
70 2.75 2.27 1.96 1.79 1.48 1.35 1.29
72 2.82 2.32 2.02 1.85 1.52 1.39 1.33
75 3.04 2.39 2.11 1.93 1.58 1.44 1.39
80 3.25 2.51 2.26 2.07 1.67 1.53 1.48
85 3.47 2.63 2.41 2.21 1.77 1.62 1.58
90 3.68 2.75 2.56 2.35 1.86 1.71 1:67
This volume must be released over a period of 2-5 days
Mallard Creek HigJi School Turnbull Sigmon Design
JOB NO.: 03055 BY: BCar iooi Morehead Square Dr., Suite 530 ? ® °,
DATE: 1216104 P.M.: ECnI Charlotte, North Carolina 28203 rt `
REVISED: 4121105 tiVATER UALTI'YBASINDESIGN
WATER QUALITYBASIN #1 MODEL
Water Qualitif Basin Storage Volumes
Elevation
(ms!) Area
(SO i Area
(ac) Volume
(cu-ft) Volume
(ac-ft)
720 5703 0.1309 0 0.0000
721 9152 i 0.2101 7352 0.1688
722 10506 1 0.2412 17164 i 0.3940
723 ! 11937 0.2740 , 28367 0.6512
724 1 13446 0.3087 1 41038 0.9421
725 15028 i 0.3450 55253 1.2684
726 22264 0.5111 73763 1.6934
727 24165 ( 0.5548 96947 2.2256
728 26134 0.6000 122065 2.8022
729 28180 0.6469 149189 3.4249
Forebay Storage Volumes (21.2°6)
Elevation i
(msl) Area
(so Area
(ac) Volume
(cu-ft) Volume
(ac-ft)
721 2711 0.0622 ! 0 0.0000
722 3288 0.0755 2992 0.0687
723 3903 0.0896 6579 0.1510
724 4556 0.1046 10800 0.2479
725 5245 I 0.1204 1 15692 0.3602

i
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Storage Volumes
Elevation ;
(msq Area
(ac) ! Volume
I (ac-ft)
726 0.5111 0.00
727 0.5548 0.53
728 1 0.6000 1.11
729 ! 0.6469 i 1.73
I

I

Elevation Interpolation
Elev Storage Area Storage Area
728
Elev
729 1.1089
1.6425
1.7315 26134
27887
28180
Story a elevation = 2.86 ft. above permanent pool elev.
Storage elevation = 728.86
Determination of High Water Elevation
F--157-3 -331h A 3/2
Q= 10 yr. storm runoff 194.00 cfs
1= weir length 24.00 ft
h= elevation over weir h ft
h= (Q/3.33 X I)^2/3
h= 1.80619
Elevation 730.66
Determination ofEmernency pilhuail Size 730.75
Q=3.331h^3/2
Q= 100 yr. storm runoff 275.00 cfs
1= weir length 1 ft
h= elevation over weir 1.25 ft
1= Q/(3.33 X I^3/2)
Length 59.09
Mallard Creels High School Turnbull Sigmon Design fem.. ,
JOB NO.: 030,5;; BY: BCDr iooi Morehead Square Dr., Suite 530
DATE: 1216104 P.M.: ECnt Charlotte, North Carolina 28203
RE, V'D: 4121105 FLOATATION CALCULATIONS
Calculations Given Data Standard Footing Assumptions
Buoyant Weight of Concrete 87.6 Ibslft^3 1. Footing base to be 1 ft. wider than structure
Weight of_Water
Safet Factor S.F. _62.4 Ibslft"3
1.25 on all sides.
2. Footing depth to be a minimum of 8 inches in depth.
Eg uatiotts used:
Outlet Structure Weight, W(s) = 4(w + t) x t x h x W(bc)
where, w = outlet box inside dimension, ft.
Displaced Water Weight, W(w) = 4 x (w + 21) x W(w) x h t = structure wall thickness, ft.
h = height of structure, ft.
Required Base Weight, W(b) = (W(w) x S.F.) - W(s) W(bc)= buoyant weight of concrete, Ibs/ft^3
W(w) = weight of water, Ibslft^3
Required Footing Volume, V(f) = W(b) /W(bc) S.F.= safety factor
Structure Dimensions Object Wci flits
Height of structure, h = 9 ft. Outlet Structure Weight, W(s) _ 10249 Ibs
Structure wall thickness, t = 6 in. Displaced Water Weight, W(w) = 15724.8 Ibs
niitlat link in.cirla rliman.Sinn w = 6 ft. Read Base Weight. W(b) = 9407 Ibs
Footing Size
Required Footing Volume, V(f) _ 107 cf Standard Footing Length, L _ 9.00 ft.
Provided Footing Volume, V(t) = 162 cf Standard Footing Width, W = 9.00 ft
Footing Check okay Minimum Footing Depth, D = 1.68 ft.
Footing Size to be used: Length = 9.00 ft.
Width = 9.00 ft. Outlet Structure #9
Depth = 2.00 ft. -
Mallard Creek Hi School Turnbull Sigmon Design
JOB NO.: 03055 BY: sCM low Morehead Square Dr., Suite 530
DATE: 1216104 P.M.: ECAI Charlotte, North Carolina 28203
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REVISED: 4121105 STORM DRAINAGE DESIGN DATA
-- LOCATION -

- FROh1 ; TO DRAIN
AREA

(acre) - RUNOFF

C I I Q inlet Q pipe
(cfs) (cfs) PIPE
_ROUNDED

n ( SLOPE LENGTH! SIZE SIZE
(fUft) (ft) f (inches) (inches) TRAVELTIME
FULL DELTA TOTAL

VEL. "T" "T"
(fps) (min) (min) INVERT ELEV.
j

INV INV INV
OUT IN f OUT PIPE DEPTH
(FROM) {FROM)
_-_-
RI11.1 COVER
ELEVATION DEPTH
OS#127- HW#128 46.05 0.60 7.03 1 - ---? 194.2 0.013 j 0.010 43 53.7 54 12.2 1 0.06 1 0.06 719.80 719.37

-

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ID 03-055 Mallard creek High School
ID
ID irrtrthrtkrtrtrtrtrtrtrtrtrtrtrtrthrttrtrrtrtrtrtrt
ID
ID charlotte North Carolina
ID Basin A - Routed
ID TURNBULL SIGMON DESIGN
ID 4/21/05
IT 5 0 0 2000
10 4
KKDrawdown
RS 1 ELEV 728.86
SAO.3450 0.5111 0.5548 0.6000 0.6469
SE725.00 726.00 727.00 728.00 729.00
SL726.18 0.098 0.6 0.5
SS999.00 0.000 3 1.5
KO 21
zz
Drawdown.ihl
Page 1
Drawdo (CFS)
0.9
0.8
0.7
v 0.6
0.5
0.4
0
0.3
0.2
0.1
0
0 2000 4000 6000
- Drawdo (CFS)

7 0,
Time (min)
Time (Minutes), Drawdo (CFS),
5, .772,
10, .769,
15, .768,
20, .766,
25, .765,
30, .764,
35, .763,
40, .761,
45, .76,
so, .759,
55, .758,
60, .756,
65, .755,
70, .754,
75, .753,
80, .751,
85, .75,
90, .749,
95, .748,
100, .747,
105, .745,
110, .744,
115, .743,
120, .742,
125, .74,
130, .739,
135, .738,
140, .737,
145, .735,
150, .734,
155, .733,
160, .732,
165, .731,
170, .729,
175, .728,
180, .727,
185, .726,
190, .725,
195, .723,
200, .722,
205, .721,
210, .72,
215, .719,
220, .717,
225, .716,
230, .715,
235, .714,
240, .713,
245, .712,
250, .71,
255, .709,
260, .708,
265, .707,
270, .706,
275, .705,
280, .703,
285, .702,
290, .701,
295, .7,
300, .699,
305, .698,
310, .696,
315, .695,
320, .694,
325, .693,
330, .692,
335, .691,
340, .69,
345, .688,
350, .687,
355, .686,
360, .685,
365, .684,
370, .683,
375, .682,
380, .68,
385, .679,
390, .678,
395, .677,
400, .675,
405, .674,
410, .673,
415, .671,
420, .67,
425, .669,
430, .668,
435, .666,
440, .665,
TIME.TXT
Page 1
445, .664,
450, .662,
45S, .661,
460, .66,
465, .6S9,
470, .657,
475, .656,
480, .655,
48S, .654,
490, .652,
495, .651,
500, .65,
S05, .649,
510, .647,
S15, .646,
520, .645,
525, .644,
530, .642,
535, .641,
540, .64,
545, .639,
550, .638,
555, .636,
560, .635,
565, .633,
570, .632,
575, .63,
580, .629,
585, .627,
590, .626,
595, .624,
600, .623,
605, .621,
610, .62,
615, .618,
620, .617,
625, .615,
630, .614,
635, .612,
640, .611,
645, .61,
650, .608,
655, .607,
660, .605,
665, .604,
670, .602,
675, .601,
680, .599,
685, .598,
690, .597,
695, .595,
700, .594,
705, .592,
710, .591,
715, .589,
720, .588,
725, .587,
730, .585,
735, .584,
740, .582,
745, .581,
7S0, .58,
7S5, .578,
760, .577,
765, .576,
770, .574,
775, .573,
780, .571,
785, .57,
790, .569,
795, .567,
800, .566,
805, .565,
810, .563,
815, .562,
820, .561,
825, .559,
830, .558,
835, .557,
840, 555,
845, .554,
850, .553,
855, .551,
860, .55,
865, .549,
870, .547,
875, .546,
880, .545,
885, .544,
890, .542,
895, .541,
TIME.TXT
Page 2
900, .54,
905, .538,
910, .537,
915, .536,
920, .534,
925, .533,
930, .532,
935, .531,
940, .529,
945, .528,
950, .527,
955, .526,
960, .524,
96S, .523,
970, .522,
975, .521,
980, .519,
985, .518,
990, .517,
995, .516,
1000, .514,
1005, .513,
1010, .512,
1015, .511,
1020, .51,
1025, .508,
1030, .507,
1035, .506,
1040, .505,
1045, .504,
1050, .502,
1055, .501,
1060, .5,
1065, .499,
1070, .498,
1075, .496,
1080, .495,
1085, .494,
1090, .493,
1095, .492,
1100, .49,
1105, .489,
1110, .488,
1115, .487,
1120, .486,
1125, .485,
1130, .483,
1135, .482,
1140, .481,
1145, .48,
1150, .479,
1155, .478,
1160, .477,
1165, .475,
1170, .474,
1175, .473,
1180, .472,
1185, .471,
1190, .47,
1195, .469,
1200, .468,
1205, .466,
1210, .465,
1215, .463,
1220, .462,
1225, .46,
1230, .459,
1235, .458,
1240, .456,
1245, .455,
1250, .453,
1255, .452,
1260, .451,
1265, .449,
1270, .448,
1275, .447,
1280, .445,
1285, .444,
1290, .442,
1295, .441,
1300, .44,
130S, .438,
1310, .437,
1315, .436,
1320, .434,
1325, .433,
1330, .432,
1335, .43,
1340, .429,
1345, .428,
1350, .426,
Page 3
TIME.TXT
1355, .425,
1360, .423,
1365, .422,
1370, .42,
1375, .419,
1380, .417,
1385, .416,
1390, .414,
1395, .413,
1400, .411,
1405, .41,
1410, .409,
1415, .407,
1420, .406,
1425, .404,
1430, .403,
1435, .401,
1440, .4,
1445, .398,
1450, .397,
1455, .396,
1460, .394,
1465, .393,
1470, .391,
1475, .39,
1480, .389,
1485, .387,
1490, .386,
1495, .385,
1500, .383,
1505, .382,
1510, .38,
1515, .379,
1520, .378,
1525, .376,
1530, .375,
1535, .374,
1540, .372,
1545, .371,
1550, .37,
1555, .368,
1560, .367,
1565, .366,
1570, .365,
1575, .363,
1580, .362,
1585, .361,
1590, .359,
1595, .358,
1600, .357,
1605, .355,
1610, .354,
1615, .352,
1620, .351,
1625, .349,
1630, .348,
1635, .346,
1640, .345,
1645, .343,
1650, .342,
1655, .34,
1660, .339,
1665, .337,
1670, .336,
1675, .334,
1680, .333,
1685, .331,
1690, .33,
1695, .328,
1700, .327,
1705, .325,
1710, .324,
1715, .323,
1720, .321,
1725, .32,
1730, .318,
1735, .317,
1740, .316,
1745, .314,
1750, .313,
1755, .311,
1760, .31,
1765, .309,
1770, .307,
1775, .306,
1780, .305,
1785, .303,
1790, .302,
1795, .301,
1800, .299,
1805, .298,
Page 4
TIME.TXT
1810, .297,
1815, .295,
1820, .294,
1825, .293,
1830, .291,
1835, .29,
1840, .289,
1845, .288,
1850, .286,
1855, .285,
1860, .283,
1865, .281,
1870, .28,
1875, .278,
1880, .277,
1885, .275,
1890, .274,
1895, .272,
1900, .271,
1905, .269,
1910, .268,
1915, .267,
1920, .265,
1925, .264,
1930, .262,
1935, .261,
1940, .259,
1945, .258,
1950, .257,
1955, .255,
1960, .254,
1965, .2S2,
1970, .251,
1975, .25,
1980, .248,
1985, .247,
1990, .246,
1995, .244,
2000, .243,
2005, .242,
2010, .24,
2015, .239,
2020, .237,
2025, .236,
2030, .234,
2035, .233,
2040, .231,
2045, .23,
2050, .228,
2055, .227,
2060, .225,
2065, .224,
2070, .222,
2075, .221,
2080, .219,
2085, .218,
2090, .217,
2095, .215,
2100, .214,
2105, .212,
2110, .211,
2115, .21,
2120, .208,
2125, .207,
2130, .204,
2135, .201,
2140, .198,
2145, .195,
2150, .192,
2155, .19,
2160, .187,
2165, .184,
2170, .182,
2175, .179,
2180, .177,
2185, .174,
2190, .172,
2195, .17,
2200, .167,
2205, .165,
2210, .162,
2215, .16,
2220, .158,
2225, .156,
2230, .154,
2235, .151,
2240, .149,
2245, .147,
2250, .145,
2255, .143,
2260, .141,
TIME.TXT
Page 5
2265, .139,
2270, .137,
2275, .135,
2280, .133,
2285, .131,
2290, .13,
2295, .128,
2300, .126,
2305, .124,
2310, .123,
2315, .121,
2320, .119,
2325, .117,
2330, .116,
2335, .114,
2340, .113,
2345, .111,
2350, .109,
2355, .108,
2360, .106,
2365, .105,
2370, .103,
2375, .102,
2380, .101,
2385, .099,
2390, .098,
2395, .096,
2400, .095,
2405, .094,
2410, .092,
2415, .091,
2420, .09,
2425, .089,
2430, .087,
2435, .086,
2440, .085,
2445, .084,
2450, .083,
2455, .081,
2460, .08,
2465, .079,
2470, .078,
2475, .077,
2480, .076,
2485, .075,
2490, .074,
2495, .073,
2500, .072,
2505, .071,
2510, .07,
2515, .069,
2520, .068,
2525, .067,
2530, .066,
2535, .065,
2540, .064,
2545, .063,
2550, .062,
2555, .061,
2560, .061,
2565, .06,
2570, .059,
2575, .058,
2580, .057,
2585, .056,
2590, .056,
2595, .055,
2600, .054,
2605, .053,
2610, .053,
2615, .052,
2620, .051,
2625, .05,
2630, .05,
2635, .049,
2640, .048,
2645, .048,
2650, .047,
2655, .046,
2660, .046,
2665, .045,
2670, .044,
2675, .044,
2680, .043,
2685, .043,
2690, .042,
2695, .041,
2700, .041,
2705, .04,
2710, .04,
2715, .039,
TIME.TXT
Page 6
2720, .039,
2725, .038,
2730, .037,
2735, .037,
2740, .036,
2745, .036,
2750, .035,
2755, .035,
2760, .034,
2765, .034,
2770, .033,
2775, .033,
2780, .033,
2785, .032,
2790, .032,
2795, .031,
2800, .031,
2805, .03,
2810, .03,
2815, .029,
2820, .029,
2825, .029,
2830, .028,
2835, .028,
2840, .027,
2845, .027,
2850, .027,
2855, .026,
2860, .026,
2865, .026,
2870, .025,
2875, .025,
2880, .025,
2885, .024,
2890, .024,
2895, .024,
2900, .023,
2905, .023,
2910, .023,
2915, .022,
2920, .022,
2925, .022,
2930, .021,
2935, .021,
2940, .021,
2945, .02,
2950, .02,
2955, .02,
2960, .02,
2965, .019,
2970, .019,
2975, .019,
2980, .019,
2985, .018,
2990, .018,
2995, .018,
3000, .017,
3005, .017,
3010, .017,
3015, .017,
3020, .017,
3025, .016,
3030, .016,
3035, .016,
3040, .016,
3045, .015,
3050, .015,
3055, .015,
3060, .015,
3065, .015,
3070, .014,
3075, .014,
3080, .014,
3085, .014,
3090, .014,
3095, .013,
3100, .013,
3105, .013,
3110, .013,
3115, .013,
3120, .012,
3125, .012,
3130, .012,
3135, .012,
3140, .012,
3145, .012,
3150, .011,
3155, .011,
3160, .011,
3165, .011,
3170, .011,
Page 7
TIME.TXT
3175, .011,
3180, .011,
3185, .01,
3190, .01,
3195, .01,
3200, .01,
3205, .01,
3210, .01,
3215, .01,
3220, .009,
3225, .009,
3230, .009,
3235, .009,
3240, .009,
3245, .009,
3250, .009,
3255, .009,
3260, .008,
3265, .008,
3270, .008,
3275, .008,
3280, .008,
3285, .008,
3290, .008,
3295, .008,
3300, .007,
3305, .007,
3310, .007,
3315, .007,
3320, .007,
3325, .007,
3330, .007,
3335, .007,
3340, .007,
3345, .007,
3350, .007,
3355, .006,
3360, .006,
3365, .006,
3370, .006,
3375, .006,
3380, .006,
3385, .006,
3390, .006,
3395, .006,
3400, .006,
3405, .006,
3410, .005,
3415, .005,
3420, .005,
3425, .005,
3430, .005,
3435, .005,
3440, .005,
3445, .005,
3450, .005,
3455, .005,
3460, .005,
3465, .005,
3470, .005,
3475, .005,
3480, .005,
3485, .004,
3490, .004,
3495, .004,
3500, .004,
3505, .004,
3510, .004,
3515, .004,
3520, .004,
3525, .004,
3530, .004,
3535, .004,
3540, .004,
3545, .004,
3550, .004,
3555, .004,
3560, .004,
3565, .004,
3570, .004,
3575, .003,
3580, .003,
3585, .003,
3590, .003,
3595, .003,
3600, .003,
3605, .003,
3610, .003,
3615, .003,
3620, .003,
3625, .003,
TIME.TXT
Page 8
3630, .003,
3635, .003,
3640, .003,
3645, .003,
3650, .003,
3655, .003,
3660, .003,
3665, .003,
3670, .003,
3675, .003,
3680, .003,
3685, .003,
3690, .002,
3695, .002,
3700, .002,
3705, .002,
3710, .002,
3715, .002,
3720, .002,
3725, .002,
3730, .002,
3735, .002,
3740, .002,
3745, .002,
3750, .002,
3755, .002,
3760, .002,
3765, .002,
3770, .002,
3775, .002,
3780, .002,
3785, .002,
3790, .002,
3795, .002,
3800, .002,
3805, .002,
3810, .002,
3815, .002,
3820, .002,
3825, ! .002,
3830, .002,
3835, .002,
3840, .002,
3845, .002,
3850, .002,
3855, .002,
3860, .002,
3865, .002,
3870, .002,
3875, .001,
3880, .001,
3885, .001,
3890, .001,
3895, .001,
3900, .001,
3905, .001,
3910, .001,
3915, .001,
3920, .001,
3925, .001,
3930, .001,
3935, .001,
3940, .001,
3945, .001,
3950, .001,
3955, .001,
3960, .001,
3965, .001,
3970, .001,
3975, .001,
3980, .001,
3985, .001,
3990, .001,
3995, .001,
4000, .001,
4005, .001,
4010, .001,
4015, .001,
4020, .001,
4025, .001,
4030, .001,
4035, .001,
4040, .001,
4045, .001,
4050, .001,
4055, .001,
4060, .001,
4065, .001,
4070, .001,
4075, .001,
4080, .001,
Page 9
TIME.TXT
4085, .001,
4090, .001,
4095, .001,
4100, .001,
4105, .001,
4110, .001,
4115, .001,
4120, .001,
4125, .001,
4130, .001,
4135, .001,
4140, .001,
4145, .001,
4150, .001,
4155, .001,
4160, .001,
4165, .001,
4170, .001,
4175, .001,
4180, .001,
4185, .001,
4190, .001,
4195, .001,
4200, .001,
4205, .001,
4210, .001,
4215, .001,
4220, .001,
4225, .001,
4230, .001,
4235, .001,
4240, .001,
4245, .001,
4250, .001,
4255, .001,
4260, .001,
4265, 0,
4270, 0,
TIME.TXT
Page 10
W ml Turnbull Sigmon Design
JOB NO.: 03-055 BY: BCM fool Morehead Square Dr., Suite 530

DATE: 4120105
T.L.:
Charlotte, North Carolina 28203 Q
/
REVISED: - P.M.: Detention Calculations
Riser Dimensions
Riser= 72.0 in square
Thk= 6.o in
Area= 25.00 sqft
Elev= 728.86 ft
Emergency Spillway Dimensions
Length= 59 ft
Elev= 730.35 ft
Outlet
Type
ID
Equation
Size
Invert
Elev
Area
Coeff.
LenTth Num
Outlets
Orifice 1 Orifice (ft) 0.35 726 726.18 o.o96 o.6 N/A 1
Orifice 2 Orifice (ft) 0 999 999.00 0.000 o.6 N/A o
Riser 3 Weir (ft) 20 - 728.86 - 3.33 20 1
ES 4 Weir (ft) 59 - 730.35 - 3.1 59 1
Barrel 5 Orifice (ft) 4.5 719.8 722.05 15.8963 o.6 N/A 1

IlElevation Head (1)
(ft) Head (2)
(ft) Head (3)
(ft) Head (4)
(ft) Q (1)
(cfs) Q (2)
(cfs) Q (3) A
(cfs) Q (3) B
(cfs) Q (3)
(cfs) Q STR
(cfs) Q (4)
(Cfs) Q (5)
(Cfs) Q (total)
(cfs)
720.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
726.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 152.12 0.00
727.00 0.83 0.0 0.0 0.0 0.42 0.00 0.00 0.00 0.00 0.42 0.00 170.29 0.42
728.00 1.83 0.0 0.0 0.0 0.63 0.00 0.00 0.00 0.00 0.63 0.00 186.70 0.63
729.00 2.83 0.0 0.1 0.0 0.78 0.00 3.49 0.00 3.49 4.27 0.00 201.78 4.27
729.67 3.50 0.0 0.8 0.0 0.87 0.00 48.55 0.00 48.55 49.42 0.00 211.28 49.42
730.00 3.83 0.0 1.1 0.0 0.91 0.00 81.06 0.00 81.06 81.97 0.00 215.81 81.97
731.00 4.83 0.0 2.1 0.6 1.02 0.00 208.49 176.09 176.09 177.11 95.85 228.98 272.96
0.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.0 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1 .......................... ..........a....
• FLOOD HYDROGRAPH PACKAGE (EEC-1)
JUN 1998
• VERSION 4.1
• RUN DATE 21APR05 TIME 15:08:14 `
x x xxxxxxx xxxxx x
x x x x x xx
x x x x x
xxxxxxx xxxx x xxxxx x
x x x x x
x x x x x x
x x xxxxxxx xxxxx xxx
1
1
• U.S. ARMY CORPS OF ENGINEERS
HYDROLOGIC ENGINEERING CENTER
• 609 SECOND STREET
• DAVIS, CALIFORNIA 95616
1916) 756-1104
.as ..................... a... __ ......
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH 7HE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTPIN77 VERSION
NEW OPTICNS: DANBREA.K OUTFLCW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND ?MPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERE14CE ALGORITHM
HEC-1 INPUT FAGE 1
LINE ID ....... 1....... 2.......3.......4. ......5 .......6. ......7 .......8. ......9 ......10
1 ID 03-042 Mallard Creek High Sc hool
2 ID
3 ID ........ .....a. a........
.
..
4 ID
5 ID Charlotte North Carolin a
6 ID WQ01 Basin - Routed
7 ID TURNBULL SIGMCN DESIGN
8 ID 4/21/05
9 IT 1 0 0 2000
10 IO 5
11 KK Fst-2 Post-DEVELOPED 2YR STOP14
12 KM DEVELOPMENT BASIN RUNOFF
13 KO 0 0 0 21
14 KM 2 YEAR 6 HOUR RAINFALL
15 FB 2.26
16 IN 5
17 PI 0.0 0.007 0.007 0.008 0.006 0.008 0.008 0.009 0.009 0.009
18 PI 0.009 0.009 0.010 0.010 0.010 0.011 0.011 0.011 0.012 0.014
19 PI 0.014 0.015 0.016 0.017 0.018 0.021 0.022 0.024 0.026 0.028
20 PI 0.031 0.044 0.050 0.058 0.089 0.115 0.242 0.420 0.168 0.100
21 FI 0.064 0.054 0.047 0.033 0.029 0.027 0.025 0.023 0.021 0.018
22 PI 0.017 0.016 0.016 0.015 0.014 0.012 0.012 0.011 0.011 0.010
23 PI 0.010 0.009 0.009 0.009 0.0C9 O.C08 0.008 0.008 0.008 0.008
24 PI 0.007 0.007 0.007 0.0
25 BA .0720
26 LS 0 62.00
27 UD .300
. .
...
............ 2yr route**** ..........
28 KK BASINAROUTED 2YR STORM EVENT
29 KM COMPUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED TH ROUGH DE TENTION BASIN
30 KO 5 0 0 0 21
31 RS 1 ELEV 720.00
32 SV 0.000 1.6934 2.2256 2.8022 3.4249
33 SE 720.00 726.00 727.00 728.00 729.00
34 SQ 0.00 0.000 0.42 0.63 4.27 61.97 272.96 602.07
35 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
a . ............... 10yr....... .......a....
36 KK F5t-I0POSt-DEVELOPED IOYR STCRM
37 KM Post-DEVELOPMENT BASIN RUN OFF
3B KO 21
39 KM 10 YEAR 6 HOUR RAINFALL
40 PB 3.72
41 IN 5
42 PI 0 .011 .011 .011 .012 .012 .012 .013 .013 .013
43 PI .014 .014 .015 .015 .016 .016 .017 .018 .018 .C23
44 PI .024 .025 .026 .027 .029 .036 .039 .042 .045 .049
45 PI .054 .079 .089 .103 .161 .201 .395 .590 .275 .177
46 PI .112 .095 .084 .057 .051 .047 .043 .040 .038 .030
47 PI .026 .027 .025 .024 .023 .019 .018 .017 .017 .016
48 PI .016 .015 .015 .014 .014 .013 .013 .012 .012 .012
49 PI .011 .011 .011 0.0
50 BA .0720
HEC-1 INPUT PAGE 2
LINE ID....... 1....... 2....... 3....... 4.. ..... 5....... 6. ...... 7 ....... a.. ..... 9. ..... 10
51 LS 0 82.00
52 UD .300
. . ................. 10yr route..............
53 KK LASI14AROUTED 10YR STORM EVENT
54 K'M COMPUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED T HROUGH DETENTION BASIN
55 KO 5 0 0 0 21
56 RS 1 ELEV 720.00
57 SV 0.000 1.6934 2.2256 2.8022 3.4249
56 720.00 726.00 727.00 728.00 729.00
59 SQ 0.00 O.U00 0.42 0.63 4.27 E1.97 272.96 602.07
EO SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
. . ..... ....a........ 5Qyr .................a
61 KK Pst-SOFOSt-DEVELOPED 50YR STORM
62 1,24 50 YEAR 6 HOUR RAINFALL
63 KO 21
64 PB 4.92
65 Ito 5
66 PI 0 .016 .016 .016 .017 .018 .018 .019 .019 .019
67 PI .020 .020 .021 .022 .022 .023 .024 .025 .026 .031
66 PI .032 .034 .035 .037 .039 .050 .053 .056 .061 .066
69 PI .073 .103 .116 .134 .208 .259 .508 .750 .354 .229
70 PI .146 .124 .109 .077 .069 .063 .059 .055 .051 .040
71 PI .038 .036 .034 .033 .031 .026 .025 .024 .024 .023
72 PI .022 .021 .021 .020 .020 .019 .019 .018 .018 .017
73 PI .017 .016 .016 0.0
74 BA .0720
75 LS 0 82.00
76 UD .300
. . ............ -50 yr tout..*..***
a....
...
aa.
77 KK BASINAROUTED 50YR STORM
78 m C014PUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED T HROUGH DETENTION BASIN
79 KO 5 0 0 0 21
80 RS 1 ELEV 720.00
81 SV 0.000 1.6934 2.2256 2.8022 3.4249
82 SE 720.00 726.00 727.00 728.00 729.00
83 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 6C2.07
84 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
. . ..............100 yr............. ........ .....
85 KK PSTIOOPOST-DEVELOPED 100YR STCRM
86 124 100 YEAR 6 HOUR RAINFALL
87 PB 5.34
88 IN 5
89 PI .0010 .017 .017 .018 .018 .019 .020 .020 .C20 .021
90 PI .022 .022 .023 .023 .024 .025 .026 .027 .028 .032
91 PI .034 .035 .037 .039 .041 .053 .056 .060 .065 .071
92 PI .078 .113 .126 .147 .226 .282 .555 .830 .386 .250
93 PI .160 .136 .119 .082 .074 .068 .063 .058 .055 .042
94 PI .040 .038 .036 .034 .033 .029 .027 .026 .025 .025
95 PI .024 .023 .022 .022 .021 .021 .020 .020 .019 .019
96 PI .018 .018 .017 .000
97 BA .0720
1 HEC-1 INPUT PAGE 3
LINE ID. ...... 1....... 2.......3.......4.. .....5.. .....6.. .....7 .......8... ....9. .....10
98 LS 0 82.00
99 UD .300
. . ................. 100yr route.a... a..a.a.. a......
100 KK BASINAROUTED 100YR STORM
101 K74 COMPUTE HYDROGRAPH FOR POS T-DEVELOPMENT ROUTED T HROUGH DETENTION BASIN
102 NO 5 0 0 0 21
103 RE 1 ELEV 720.00
104 SV 0.000 1.6934 2.2256 2.8022 3.4249
105 SE 720.00 726.00 727.00 728.00 729.00
106 SQ 0.00 0.000 0.42 0.63 4.27 81.97 272.96 602.07
107 SE 720.00 726.00 727.00 728.00 729.00 730.00 731.00 732.00
108 ZZ
1 ..................... ...............a..a. .. ...... ...............................
• FLOOD HYDROGRAPH PACKAGE (HEC-1) ' • U.S . AP14Y CORES OF ENGINEERS `
• JUN 1998 HYD ROLOGIC ENGINEERING CENTER
• VERSION 4.1 ` 609 SECOND STREET
• • DAVIS. CALIFORNIA 95616 '
• RUN DATE 21APR05 T1111E 15:08:14 • 19161 756-1104 `
03-042 Mallard Creek High School
Charlotte North Carolina
W0N1 Basin - Routed
TURNBULL SIGMON DESIGN
4/21/05
10 IO OUTPUT CCNTROL VARIABLES
IPRNT 5 PRINT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 1 0 STARTING DATE
ITIME 0000 STARTING TIME
NQ 2000 NUMBER OF HYDRCGRAPH ORDINATES
NDDATE 2 0 ENDING DATE
NDTIME 0919 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .02 HOURS
TOTAL TI14E BASE 33.32 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLCW CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT

11 KK ..............
` Pst-2 •
.............a
Post-DEVELOPED 2YR STORM
13 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYLROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGPAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 I FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
30 KO OUTPUT CONTROL VARIABLES
IFF14T 5 PRINT CONTROL
IPLOT 0 PLOT C014TROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH OIN THIS UNIT
ISAVI 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
36 KK ` Pst-10 '
.............. Post-DEVELOPED IOYR STORM
38 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT C014TROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
POUT 21 SAVE HYDROGRAPH ON THIS UINIT
ISAV1 1 FIRST ORDINATE PUNCHED CR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
55 KO OUTPUT CONTROL VARIABLES
IF'R1NT 5 PRINT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
POUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAVI 1 FIRST ORDINATE PUINCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
... ...
61 KK ................................. ................
• Pst-50 • Post-DEVELOPED 50YR STOF14 ...... ........ ....... ......... ..............
63 KO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAE'H
IGUT 21 SAVE HYDROGRAPH 07 THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
79 NO OUTPUT CONTROL VARIABLES
IPRNT 5 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAFH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IGUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED _
TIMINT .017 TIME INTERVAL IN HOURS
102 KO OUTPUT CCNTROL VARIABLES
IPRNT 5 PRINT CONTROL
IFLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPN H 0 PUNCH COMPUTED HYDROGRAP'H
POUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE EUNCHED OR SAVED
ISAV2 2000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
1
RUNOFF SUTIMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQU ARE MIL ES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN 14M IM:;14 TIME CF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOJR
HYDROGRAPH AT
+ Pst-2 44. 3.48 7. 2. 1. .07
ROUTED TO
+ BASINA 2. 6.37 1. 1. 0. .07
+ 728.32 6.38
HYDROGRAPH AT
+ Pst-10 103. 3.47 15. 4. 3. .07
ROUTED TO
+ BASINA 56. 3.78 9. 3. 2. .07
+ 729.67 3.76
HYDROGRAPH AT
+ Pst-50 153. 3.45 23. 6. 4. .07
ROUTED TO
+ BASINA 131. 3.58 17. 5. 3. .07
+ 730.25 3.56
HYDROGRAPH AT
+ PST100 173. 3.45 26. 7. 5. .07
ROUTED TO
+ BASINA 158. 3.55 20. 5. 4. .07
+ 730.40 3.55
•.. NORMAL END OF HEC-1 ".
MEMORANDUM
TO: John Dorney Regional Contact:
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Mallard Creek High School
Project Number 04 1530
Recvd From APP
Received Date 9/13/04
Recvd By Region
Project Type institutional
Alan Johnson
Rex Glpasnn
County Nlecklenburg
County2
Region Mooresville
Certificates Stream
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req.
F IP OTH O Y _0N F_ 13-17-5-5 F -cF-30,711. 1.23 490.00
F_ F__OY ON F_ F__ F__ F_ ( r I
Mitigation Wetland
MitigationType Type Acres Feet
Is Wetland Rating Sheet Attached? O Y *N Did you request more info? O Y @N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N
Is Mitigation required? Q Y O N Recommendation: ©O Issue O Issue/Coed O Deny
Provided by Region: Latitude (ddmmss) 352115 Longitude (ddmmss) 804600
Comments:
Staff visited the site on October 14, 2004. The site is for the proposed construction of a high school adjacent to
the Mallard Creek Community Park. I urisdi .tional waters consist of 10 wetland areas (4.9 acres total). four
stream channels (3, 500 linear feet (If) total), and a man-made pond (0.8 acre). Impacts proposed for the site
are:
cc: Regional Office
Central Office Page Number' 1
Facility Name Mallard Creek High School
Project Number 04 1530
Comments (continued from page 1):
Date: 10/21/2004
County Mecklenburg
Regional Contact: Alan Johnson
cc: Regional Office
Central Office Page Number 2
OL/- IS7??
D
DEPARTMENT OF THE ARMY C T 0 5 2UU4
Wilmington District, Corps of Engineers DENR -WATER QUALITY
Asheville Regulatory Field Office ?tiETL?WDSAN?sTORM9AU1 BNXH
151 Patton Avenue Room 208
Asheville, North Carolina 28801-5006
(http://www.saw.usace.anny.mil/WETLANDS/notices.html)
Action ID No. 200430232 October 5, 2004
PUBLIC NOTICE

Charlotte-Mecklenburg Schools, 3301 Stafford Drive, Charlotte, Mecklenburg County, 28208,
has applied for a Department of the Army (DA) permit TO PLACE FILL WITHIN 1,153
LINEAR FEET OF STREAM- CHANNEL, 0.8 ACRES OF AN OPEN WATER POND,
0.375 ACRES OF JURISDICTIONAL WETLANDS AND 0.26 ACRES . OF NON-
JURISDICTIONAL, ISOLATED WETLANDS, ADJACENT TO AND INCLUDING
UNNAMED TRIBUTARIES TO STONY CREEK, IN ORDER TO CONSTRUCT THE
PROPOSED MALLARD CREEK HIGH SCHOOL AND EXPANSION OF EXISTING
SOCCER FACILITY, LOCATED ON THE EAST AND WEST SIDE OF BINGHAM
ROAD, ADJACENT TO JOHNSTON-OEHLER ROAD, IN CHARLOTTE,
MECKLENBURG COUNTY, NORTH CAROLINA.
The following description of the work is taken from data provided by the applicant. The
proposed project site consists of approximately 85 acres located within the existing Mallard
Creek Community Park. Plans submittee with the applications ow t e propose p acement o?
ill matena mto' wear feet of stream channels, 0.8 acre of an open water pond, and 0.34
acres
school
with the
new Mallard Creek
acres of the 85-acre proiect
site. The plans submitteT also show t e proposed p acement of fill matena into 6 3'linear feet of
stream channels, 0.04 acres of jurisdictional wetlands, an 0.26 acres of non jurisdictiona ,
so ated wetlands associate wrt the expansion of an existing soccer aci ity at is currently
located on the project site. The?roposed expansion will encompass approximately 33 acres of
e entire project site. The purpose of the proposed work is two-fold; to provide an additional
high school facility to meet.current and future capacity needs and to expand an existing athletic
facility that will also accommodate increasing demands from the surrounding community. The
existing and proposed athletic facilities will be shared by Charlotte-Mecklenburg Schools and
Mecklenburg County Parks & Recreation through a joint-use agreement.
Proposed impacts associated with the construction of the high school will include the placement
of fill in an..existing 0.8-acre open water pond and 0.29 acres of wetlands Wetland "A
Wetland "A" includes a small emergent and scrub-shruF_wet1ands along the pond fringe, as well
as a linear wetland feature, upstream of the pond. Dominant vegetation in the pond fringe
includes cattail (Typha latifolia), smartweed (Polygonum sp.), soft rush (Juncus effusus), bearded
sedge (Carex comosa), red-root flatsedge (Cyperus erythrorhizos), silky dogwood (Corpus
amomum), green ash (Fraxinus pennsylvanica), and red maple (Acer rubrum). The source of
water in Wetland "A" appears to be provided by overflow of the pond, a shallow groundwater
table upslope of the pond, and precipitation. Approximately 340 linear feet of stream channel
(Stream 1 Zoriginating from the pond will also le filled. An addrtiona 150 linear eet of stream
channel Stream 2) and 0.005 acre of wetlands (Wetland 15) will be filled as a resu t of
?i improvement to Bingham R ao Stream I and 2 wwa-s ete enirm to be perennial and of fair-
Mo. ?
Pro osed impacts associated with the expansion of the existing soccer facili clude e
p acement of fill in 663 linear feet of stream channel (Stream 3 and 4), 0.04 acre of jurisdictional
wet an s (Wet an "K") and 0.26 acre of non-turisdictional, isolated wetlands ( et ands "I"). '
Stream 3 originates rom an approxima e y 2-inch culvert outlet at the edge of the existing
soccer field. Stream 3 passes through a culvert beneath the access road to the park's soccer
fields,. and eventually discharges to Stream 2 outside of the proposed project site. Stream 4
originates at a nick point in the landscape and discharges to Stream 2 beyond the boundary of the
project site. Both Stream 3 and 4 were determined to be intermittent and of poor-fair quality.
Wetland "I" T a depression surrounded by woods and mowed fields. 5ominant vegetation
includes so rush (Juncus sp.), sweetgum (Liquidambar styraciflua), winged elm (Ulmus alata),
American sycamore (Platanus occidentalis), blackberry (Rubus sp.), and goldenrod (Solidago
sp.). The source of water in this wetland is likely from precipitation and a shallow groundwater
table. Based upon a site visit by a Corps representative, this wetland area was determined to be
isolated and not subject to Section 404 of the Clean Water Act. However, this wetland is
presumed subject to the jurisdiction of the North Carolina DWQ pursuant to 15A NCAC
02H.1300.
Wetland "C" is approximately 3.87 acres in size and will not be impacted as a result of this
proiec c- 's wetland is a mafic depression that is contained within a regionally Sigm icant
iq'ta eritage Area referred to by North Carolina Natural. Heritage Program (NCNHP) as the
Bingham Road Hardpan Forest. The wetland component of this natural heritage area contains a
rare upland depression swamp forest community, locally referred to as Bingham Swamp.
Dominant vegetation includes willow oak (Quercus phellos), northern red cedar (Juniperus
virginiana), loblolly pine (Pinus taeda), white oak (Quercus alba), and shagbark hickory (Carya
ovata). The source of water in Wetland "C" is presumed to be from seasonal inundation and
saturation via precipitation in the spring. Wetland "C" extends beyond the subject property
boundary.
The applicant proposes to mitigate for impacts to jurisdictional waters and wetlands through on-
site and off-site measures. The applicants proposed mitigation plan is as follows:
Preservation of 3.87 acres of Bingham Swamp (Wetland "C") situated on the subject
property via deed restriction. In addition, the applicant proposes to include approximately
0.8 acre of upland wooded buffer situated between Bingham Swamp and the construction
limits as part of the deed restriction (Figure 10).
¦ Preservation of a stream buffer along 1,580 if of Stream 2, situated west of Bingham
Road (Figure 11). The stream buffer will be 35 feet wide on each side of the stream,
measured from top-of-bank, and will be preserved via a deed restriction.
¦ The remainder of stream in. impacts will be compensated for through the purchase of I I1
mitigation credits from the City of Charlotte's Umbrella Stream and Wetland Mitigation V"
Bank and/or the. North Carolina Ecosystem Enhancement Program (EEP). Sol ff
- l
The State of North Carolina will review this public notice to determine the need for the applicank' l/
to obtain any required State authorization. No Department of the Army (DA) permit will be
issued until the coordinated State viewpoint on the proposal has been received and reviewed by
this agency, nor will a DA permit be issued until the North Carolina Division of Water Quality
(NCDWQ) has determined the applicability of a Water Quality Certificate as required by PL 92-
500.
This application is being considered pursuant to Section 404 of the Clean Water Act (33 U.S.C.
1344). Any person may request, in writing within the comment period specified in the notice,
that a public hearing be held to consider this application. Requests for public hearing shall state,
with particularity, the reasons for holding a public hearing.
The District Engineer has consulted the latest published version of the National Register of
Historic Places for the presence or absence of registered properties, or properties listed as being
eligible for inclusion therein. Based on the best available evidence and recent correspondence
from the North Carolina Department of Cultural Resources, it has been determined that no sites
within the vicinity of the project are registered or listed as being eligible for inclusion in. the
Register. Examination of the National Register of Historic Places constitutes the extent of
cultural resource investigations by the District Engineer, and he is otherwise unaware of the
presence of other such resources. Presently, unknown archeological, scientific, prehistorical, or
historical data may be lost or destroyed by work under the requested permit.
The District Engineer, based on available information, is not aware that the proposed activity will
affect species, or their critical habitat, designated as endangered or threatened pursuant to the
Endangered Species Act of 1973. By copy of this public notice, we are hereby requesting
comments from the U.S. Fish and Wildlife, Asheville Regional Office, regarding the proposed
project's potential impact to federally endangered or threatened species and/or their potential and
critical habitat.
The decision whether to issue a permit will be based on an evaluation of the probable impacts,
including cumulative impacts, of the proposed activity and its intended use on the public interest.
Evaluation of the probable impacts which the proposed activity may have on the public interest
requires a careful weighing of all those factors which become relevant in each particular case.
The benefits which reasonably may be expected to accrue from the proposal must be balanced
against its reasonably foreseeable detriments. The decision whether to authorize a proposal, and
if so the conditions under which it will be allowed to occur, are therefore determined by the
outcome of the general balancing process. That decision should reflect the national concern for
both protection and utilization of important resources. All factors which may be relevant to the
3
proposal must be considered including the cumulative effects thereof. Among those are
conservation, economics, aesthetics, general environmental concerns, wetlands, cultural values,
fish and wildlife values, flood hazards and flood plain values (in accordance with Executive
Order 11988), land use, navigation, shore erosion and accretion, recreation, water supply and
conservation, water quality, energy needs, safety, food and fiber production, mineral needs,
considerations of property ownership, and, in general, the needs and welfare of the people. For
activities involving the placement of dredged or fill materials in waters of the United States, a
permit will be denied if the discharge that would be authorized by such permit would not comply
with the Environmental Protection Agency's 404(b)(1) guidelines. Subject to the preceding
sentence and any other applicable guidelines or criteria, a permit will be granted unless the
District Engineer determines that it would be contrary to the public interest.
The Corps of Engineers is soliciting comments from the public; Federal, State and local agencies
and officials; Indian Tribes and other interested parties in order to consider and evaluate the
impacts of this proposed activity. Any comments received will be considered by the Corps of
Engineers to determine whether to issue, modify, condition or deny a permit for this proposal.
To make this decision, comments are used to assess impacts on endangered species, historic
properties, water quality, general environmental effects and the other public interest factors listed
above. Comments are used in the preparation of an Environmental Assessment (EA) and/or an
Environmental Impact Statement (EIS) pursuant to the National Environmental Policy Act
(NEPA). Comments are also used to determine the need for a public hearing and to determine
the overall public interest of the proposed activity.
Generally, the decision whether to issue this Department of the Army (DA) permit modification
will not be made until the North Carolina Division of Water Quality (NCDWQ) issues, denies, or
waives State certification required by Section 401 of the Clean Water Act. The NCDWQ
considers whether or not the proposed activity will comply with Sections 301, 302, 306, and 307
of the Clean Water Act. The application and this public notice for the Department of the Army
(DA) permit serves as application to the NCDWQ for certification.
Additional information regarding the Clean Water Act certification may be reviewed at the
offices of the Wetlands /401 Unit, North Carolina DENR, Division of Water Quality, 2321
Crabtree Boulevard, Raleigh, North Carolina. Copies of such materials will be furnished to any
person requesting copies upon payment of reproduction costs.
All persons desiring to make comments regarding the application for Clean Water Act
certification should do so in writing delivered to the North Carolina Division of Water Quality
(NCDWQ), Wetlands/401 Unit, 1650 Mail Service Center, Raleigh, North Carolina, 27699-
1650, on or before Friday, October 29, 2004, Attention: Mr. John Domey.
Written comments pertinent to the proposed work, as outlined above, will be received in this
office, Attention: Ms. Amanda Jones, until 4:15 p.m. on Thursday, November 5, 2004 or
telephone [phone] extension 231.
4

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Not To Scale
"- • • - Drainage Features
On-Site Soil Man Units
EnD - Enon sandy loam, 8-15% slopes
IrA - Iredell fine sandy loam, 0-1% slopes
IrB - Iredell fine sandy loam, 1-8% slopes
MeB - Mecklenburg fine sandy loam, 2-8% slopes
MO - Monocan soils
WkD- Wilkes loam, 8-15% slopes North Carolina Vicinity Map
Proposed Mallard Creek
High School
Mecklenburg County
North Carolina
RALPH WHITEHEAD Soil Survey Map
ASSOCIATES, INC. FIGURE 2

°
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WETLAN AREA., ?r
$, 53 SQ. FT OR O. ITADR oo
$ '
y
r ?WETLAND VARFA: i
?
? ND/OPEN WATER
WETLAND''AREA. 146 W.FT. OR a 19 ACRE a
O
BO ACRE r
.
113 SQ.FT. OR 0.003 ACRE /

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04 ACRE
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t
STREAM I-IMPORTANT
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APPROXIMATE CHANNEL WIDTH 3 FEET I
STREAM 2-fMPORTANT? 11
1,560 UNEAR FEET
(WEST OF GINGHAM RD)

/

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zu

NOTES:
I. Jurisdictional waters ojthe MS., including ?• ,, ' ;,
wetlands, were delineated in the field by Ralph i\
147uteheadAssociates, Inc, in September and
Oct ober 2003- The boundaries ojjurisdictional
?•
??i
?
\
i?
wet n watery were marked in thefiekL The ?
delineation was verged by the U-%Army Corps
oJEnpineers (USACE) on November j7,2003. A l ?-
i;j
written verfcation oJthe wetland boundary
survey was provided by the USACE an June 9, / I
2004.
/
-----
e
-??_•? ?
+/ ..
a Wetlands Survey pefonncd and provided by
R.B. Pharr&Assocfates, P.A. WETLAND t>' I l
1,190 SQ.FT. 03 ACRE WETLAND V AREA:
LEGEND / 4,454 SQ.FT. OR 0.10 ACRE
X11
ssssssO N 0 saw BOUNDARYUNR ?_- _ '_ _ •• I ; ??? ` /
?? .ss? s»!s PERENNIALSTREAAI
?? 1 sas>• i ssssas. sss? IMPORTANT STRFA3t
1 s t s? s s UNIMPORTANTSTREMI LIMITS OF
LSIMITS
STUD TUYL
I • •I ISOLATED Iti'ETIAND a STREAMIIMPORTA?
226 IN 1
.
J
rr
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??
JURISDICTIONAL (EAST OFBINGHAMRD)
y /
AND
WETLAND
?
p 1
lip
OPEN WATER /
WATERS OF THE U.S. AND WETLANDS BOUNDARYM AP

PROPOSED MALLARD CREEK HIGH SCHOOL
GRAPHIC SCALE UMU
08/12/04

SCHOOL SITE - COMPONENT I ss o a Izs zso

1114 i 1NWNe1:
! JLs
Mecklenburg County
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,
.
. ( IN FEET) SHE .
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e
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ISOLATED WEMND NOT
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e e o e
s
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o EX/S77A/GS000ER FIELDS
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e
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j WETLAND VAREA:
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APPROXIMATE CHANNEL WIDTH 2 MET
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N077_5:
t. Jurisdictional waters ofthe U.S., including
wetlands, were delineated in thefe l by Ralph
N7uteheadAssociates, Inc., in September and
j October2oo3. The boundaries ofjurisdictional
+0.,s Pq.. wetlands/waters were marked in thefield. The
lO• delineation was ver{(ed by the U.S. Army Corps
-- --s?? gfEngineers (USACE) on November z7 2003. A
written verification gfthewetland boundary
?? survey was provided by the I1rSACB on June 9,
° ? 200
° %* Z. 1etlands Surveypeformedandpraridedby
R.B. Pharr &Associates, P.A.
?? • • 06
LEGEND
• ? N ¦ ssssss0s 13OUNDARYIJNE
FIELDS ems' "E s0004 PERENNIALSTREAM
sewisssss esaissss° IMPORTANT STREAM
ss? s s ?? s UNIMPORTANT STREAM

t ISOLATED WETLAND
e ll.?? ??..JJ
JURISDICTIONAL
WETLAND
l0 e
e ( e 778 LIN Er 0117 ACRE e o OPEN WATER
/ ,,iAPPROXIMA7 NNEL WIDTH 4 FEET e e
WATERS OF THE U.S. AND WETLANDS BOUiTDARYAL P
GRAPHIC SCALE UA'08112/04
57 PROPOSED MALLARD CREEK HIGH SCHOOL
BY;
s PARK EXPANSION SITE - COMPONENT II 250 0 125 zso °"^""J
LS
NEGMEO tlY:
x Mecklenburg Countji , N.C. ( IN FEET) ENE W _
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404 JURISDICTION'
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CONSTRUCTION UblIT3 %\ 7 -? ? ? ? t \? `? a / `? \1
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1y J CJ ARE,4l 4.ACRE n _- 1 ! / 1 --- SITE BOUNDARY
1 %/ //JJ! • ` t I # \ \ • \ ' -, i r! r*y
1 _ - - _ _ _ _ EXISTING CONTOUR
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\;?\ ANDWETIANDS
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UAi E:
75 PROPOSED MALLARD CREEK HIGH SCHOOL GRAPHIC SCALE .Nuy: 09/01/04
250 0 125 250 "Aw"JLS
IMPACT AREAS - COMPONENT H - PARK EXPANSION
r 'MECNEO bY:
r Mecklenburg Counhj, N.C. (ix Beer) GU NE NU:
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09
h PROPOSED MALLARD CREEKHIGH SCHOOL 100 GRAPHI00 SCALE
o Wu
9
BMW JLS
I111PACTAREAS
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DATE:
PROPOSED MALLARD CREEK HIGH SCHOOL 100 GRAPHIC SCALE 100 09/01/04
0 50 UM?N BY:
JLS
E IPACT AREAS
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PROPOSEDMALLARD CREEKHIGHSCHOOL GRAPHIC SCALE
09/01/04
100 0 50 100 I-N ur:
c IMPACT AREAS .It_S
14l.RtD UY:
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100 0 50 100 -m by:
IMPACTAREAS ??s
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UAIE:
PROPOSED MALLARD CREEK HIGH SCHOOL GRAPHIC SCALE 09/01104
100 w wN ur:
PROPOSED COMPENSATORYMITIGATION ° 50 t00 .1LS
AND UPLAND BUFFER PRESERVATION
IN FEET
tiVETLAND C ( ) AuNE u:
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PROPOSED MALLARD CREEK HIGH SCHOOL GRAPHIC SCALE °n'osro1104
PROPOSED COMPENSATORYMITIGATION 150 o 75 lso
AND UPLAND BUFFER PRESERVATION
STREAM 2 ( IN FEET) , n:unE ire;. -
r 1 Inch = 150 IL 11
Mallard Creek H.S. Impasse - DWQ 804-1530 DL? $3
Subject: Mallard Creek H.S. Impasse - DWQ #04-1530
From: "Michael Iagnocco" <[e-mail]>
Date: Fri, 3 Jun 2005 18:14:20 -0400
To: "John Dorney (E-mail)" <[e-mail]>
Hey John! hope you are well. I find myself reaching out to you once again &hope you
can help. The 401 Certification for the above project was issued on March 9th 2005
under your signature. The certification contained the standard condition that the
stormwater plan be approved by DWQ prior to the impacts occurring. The initial
submittal of our stormwater management plan was made back in January 105. We have
responded to comments on two occasions and have the understanding that our approval
is days away. The problem is that we have been in this position literally for weeks.
I realize that staff is overworked and that express permits take priority. However,
CMS's contractor is on site, facing a high school opening deadline, and I am
desperate to give them the OK to begin in earnest. Is there any chance that you
could reissue the 401 and modify the stormwater condition to read that we will submit
the stormwater plan by a certain date?? (you recently accommodated DOC's Columbus
County facility in this manner). I would forever be in your debt. CMS is making
things very uncomfortable on my end. Please call me to discuss. Thanks
Michael A. Iagnocco, P.W.S.
Project Manager/Senior Scientist
[e-mail]
Ralph Whitehead Associates, Inc.
1000 W. Morehead, Suite 200
Charlotte, NC 28208
www.rwhitehead.com
ph: 704/372-1885
fx: 704/372-3393
cell: 704/281-7918

1 of 1 6/6/2005 8:25 AM
Michael F. Easley, Governor
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ID North Carolina Department of Environment and Natural Resources
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p .? Alan W. Klimek, P.E. Director
Division of Water Quality
Division of Water Quality
Department of Environmental and Natural Resources
401 Oversight/Express Permit, Program Development and
Transportation Permitting Units
Street Address: 2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
Mailing Address: 1650 Mail Service Center
Raleigh, NC 27699-1650
Contact Information: Phone #:
Fax #:
w
Fax To: I V 1'k a C C o
919-733-1786
919-733-6893
11, Fax #: r7oy- 372 -3 t3
Company: &Qa? L%Coa ADate: Log-
Number of pages including cover sheet:
Notes or special instructions:
Yom- ?
401 Oversight/Express Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.ne.us/ncA,ctlands
N `
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An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
O?o? WAT 1g1G
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Mr. Mike Huggins
Charlotte-Mecklenburg School District
3301 Stafford Drive
Charlotte, NC 28202
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 6, 2005
Re: Mallard Creek High School
Mecklenburg County
DWQ #04-1530; USACE Action ID. No. 200430232
APPROVAL of 401 Water Quality Certification; Modified
Dear Mr. Huggins:
Attached hereto is a copy of Certification No. 3503 issued to Charlotte-Mecklenburg Schools,
dated March 9, 2005 and as modified on June 6, 2005 (condition number 6). In addition, you
should get any other federal, state or local permits before you go ahead with your project
including (but not limited to) Solid Waste, Sediment and Erosion Control, Stormwater, Dam
Safety, Non-discharge and Water Supply Watershed regulations.
If we can be of further assistance, do not hesitate to contact us.
Sincerely,
AW K/jrd
Attachments: Certificate of Completion
1
Klimek, P.E.
cc: Amanda Jones, U.S. Army Corps of Engineers, AshevilleRegulatory Field Office
Wilmington District, USACOE
Alan Johnson, DWQ, Mooresville Regional Office
Doug Miller, DLR Mooresville Regional Office
File Copy
Central Files
Sean Calloway; Turnbull Sigmon Design; 1001 Morehead Square Dr, Suite 530, Charlotte,
NC 28203
Adam Karagosian; Ralph Whitehead and Associates, P.O. Box 35624, Charlotte, NC
28235
Filename: 041530MallardCreekHS(Mecklenburg)IC
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Internet htto://h2o.enr.state. nc. us/ncwetlands
None hCarolina
Nafima!!if
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Mallard Creek High School
Page 2 of 5
June 6, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws
92-500 and 95-217 of the United States and subject to the North Carolina Division of Water
Quality (DWQ) Regulations in 15 NCAC 2H, Section .0500 to Charlotte-Mecklenburg Schools to
fill 0.610 acre of jurisdictional wetlands and 674 linear feet of streams in the Yadkin River Basin,
associated with the construction of Mallard Creek High School in Mecklenburg County, North
Carolina, pursuant to an application filed on the 5`" day of October of 2004, and in additional
correspondence received December 28, 2004 and January 11, 2005.
The application and supporting documentation provides adequate assurance that the proposed
work will not result in a violation of applicable Water Quality Standards and discharge
guidelines. Therefore, the State of North Carolina certifies that this activity will not violate the
applicable portions of Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if
conducted in accordance with the application, the supporting documentation, and conditions
hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and
as described in the Public Notice with additional correspondence as noted above. If the project
is changed, prior to notification a new application for a new Certification is required. If the
property is sold, the new owner must be given a copy of the Certification and approval letter and
is thereby responsible for complying with all conditions of this Certification. Any new owner
must notify the Division and request the Certification be issued in their name. Should wetland or
stream fill be requested in the future, additional compensatory mitigation may be required as
described in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site
plan result in a change in stream or wetland impact or an increase in impervious surfaces, the
DWQ shall be notified in writing and a new application for 401 Certification may be required.
For this approval to be valid, compliance with the conditions listed below is required.
Conditions of Certification:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and
general conditions of this Certification (or Isolated Wetland Permit) are met. No other
impacts are approved including incidental impacts:
Amount Approved Plan Location or Reference
Units
Stream 674 (feet) Proposed Mallard Creek H.S
- Impact Areas - Component
dated 12/22/04
404/CAMA Wetlands 0.61 acres See above
Sediment and Erosion Control:
2. Erosion and sediment control practices must be in full compliance with all specifications
governing the proper design, installation and operation and maintenance of such Best
Management Practices in order to protect surface waters standards:
Mallard Creek High School
Page 3 of 5
June 6, 2005
a. The erosion and sediment control measures for the project must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Sediment and Erosion Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and erosion
control measures must be such that they equal, or exceed, the requirements
specified in the most recent version of the North Carolina Sediment and Erosion
Control Manual. The devices shall be maintained on all construction sites, borrow
sites, and waste pile (spoil) projects, including contractor-owned or leased borrow
pits associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas
beyond the footprint of the impacts depicted in the 404/401 Permit Application. All
construction activities, including the design, installation, operation, and maintenance of
sediment and erosion control Best Management Practices, shall be performed so that no
violations of state water quality standards, statutes, or rules occur;
4. Sediment and erosion control measures shall not be placed in wetlands or waters to the
maximum extent practicable. If placement of sediment and erosion control devices in
wetlands and waters is unavoidable, they shall be removed and the natural grade restored
within six months of the date that the Division of Land Resources has released the project;
Continuing Compliance:
5. Charlotte-Mecklenburg Schools shall conduct construction activities in a manner
consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate
requirements of State law and federal law. If the Division determines that such
standards or laws are not being met (including the failure to sustain a designated or
achieved use) or that State or federal law is being violated, or that further conditions are
necessary to assure compliance, the Division may reevaluate and modify this
Certification to include conditions appropriate to assure compliance with such standards
and requirements in accordance with 15A NCAC 2H.0507(d). Before modifying the
Certification, the Division shall notify Charlotte-Mecklenburg Schools and the US Army
Corps of Engineers, provide public notice in accordance with 15A NCAC 2H.0503 and
provide opportunity for public hearing in accordance with 15A NCAC 2H.0504. Any new
or revised conditions shall be provided to Charlotte-Mecklenburg Schools in writing, shall
be provided to the United States Army Corps of Engineers for reference in any Permit
issued pursuant to Section 404 of the Clean Water Act, and shall also become
conditions of the 404 Permit for the project;
Stormwater Management
6. Written Stormwater Management Plan (Final Plan Needed)
A final, written stormwater management plan (including a signed and notarized
Operation and Maintenance Agreement) shall be submitted to the 401 Oversight and
Mallard Creek High School
Page 4 of 5
June 6, 2005
Express Permitting Unit (2321 Crabtree Blvd., Suite 250, Raleigh, NC, 27604) within 90
days of the issuance of the 401 Water Quality Certification. The stormwater
management plans shall be approved in writing by this Office before all of the impacts
specified in this Certification are completed. This plan must contain provisions for diffuse
flow from Drainage Basin # 2 across the protected SWMM buffer along Stony Creek as
outlined in Condition Number 8 of this Certification. You have the option of using the
Express Review Program for expedited approval of these plans. If you propose to use
the Express Review Program, remember to include the appropriate fee with the plan.
The stormwater management plan must include plans, specifications, and worksheets
for stormwater management facilities that are appropriate for the surface water
classification and designed to remove at least 85% TSS according to the most recent
version of the NC DENR Stormwater Best Management Practices Manual. These
facilities must be designed to treat the runoff from the entire project, unless otherwise
explicitly approved by the Division of Water Quality. Also, before any permanent
building is occupied at the subject site, the facilities (as approved by this Office) shall be
constructed and operational, and the stormwater management plan (as approved by this
Office) shall be implemented. The structural stormwater practices as approved by this
Office as well as drainage patterns must be maintained in perpetuity. No changes to the
structural stormwater practices shall be made without written authorization from the
Division of Water Quality.
Road Crossings:
7.
Culverts required for this project shall be installed in such a manner that the original
stream profiles are not altered. Existing stream dimensions (including the cross section
dimensions, pattern, and longitudinal profile) must be maintained above and below
locations of each culvert. Culverts shall be designed and installed to allow for aquatic life
movement as well as to prevent head cutting of the streams. If any of the existing pipes
are or become perched, the appropriate stream grade shall be re-established or, if the
pipes installed in a perched manner, the pipes shall be removed and re-installed correctly.
Placement of culverts and other structures in waters, streams, and wetlands must be
placed below the elevation of the streambed by one foot for all culverts with a diameter
greater than 48 inches, and 20 percent of the culvert diameter for culverts having a
diameter less than 48 inches, to allow low flow passage of water and aquatic life. Design
and placement of culverts and other structures including temporary erosion control
measures shall not be conducted in a manner that may result in dis-equilibrium of
wetlands or streambeds or banks, adjacent to or upstream and down stream of the above
structures. The applicant is required to provide evidence that the equilibrium shall be
maintained if requested in writing by DWQ.
Other conditions:
8. Diffuse Flow (No Review)
All constructed stormwater conveyance outlets shall be directed and maintained as
diffuse flow at non-erosive velocities through the protected SWMM stream buffers such
that it will not re-concentrate before discharging into a stream. If this is not possible, it
Mallard Creek High School
Page 5 of 5
June 6, 2005
may be necessary to provide stormwater facilities that meet DWQ's design criteria. This
may require additional approval from this Office.
9. All Erosion and Sediment Control measures shall be located outside the 35 foot
protected SWMM stream buffer.
10. A wooded buffer at least 15 (fifteen) feet wide shall be planted adjacent to Stream # 3
after construction in order to ensure that the stream bank remains stable. Additional
written approval is required from DWQ for this planting plan including a monitoring plan
for tree survival.
Also, this approval to proceed with your proposed impacts or to conduct impacts to
waters as depicted in your application shall expire upon expiration of the 404 or CAMA
Permit.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon
written request within sixty (60) days following receipt of this Certification. This request must be
in the form of a written petition conforming to Chapter 150B of the North Carolina General
Statutes and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
N.C. 27699-6714. If modifications are made to an original Certification, you have the right to an
adjudicatory hearing on the modifications upon written request within sixty (60) days following
receipt of the Certification. Unless such demands are made, this Certification shall be final and
binding.
This the 6th day of June 2005
DIVISION OF WATER QUALITY
AW Kfjrd
I
JI n 7imE.
CERTIFICATION NUMBER 3503, modified
DWQ #04-1530 Mallard Creek High School Project
Subject: DWQ #04-1530 Mallard Creek High School Project
From: Laurie Dennison <[e-mail]>
Date: Mon, 06 Jun 2005 14:58:47 -0400
To: [e-mail]
Please see attached "hold" letter for above referenced project. Hard copy sent to Mr. Mike
Higgins, Charlotte-Mecklenburg Schools via US Mail.
Laurie Dennison
NC DENR - DWQ
Wetlands-401 Unit
04-1530 stormwater more info 1lallard Creek High School 6-2-05.doc Content-Type: application/msword
Content-Encoding: base64
I of I
6/6/2005 3:00 PM
?OF W ATF,9Q Michael F. Easley, Governor
liam G. Ross Jr., Secretary
Wil
North Carolina Department of Environment and Natural Resources
\C• DWa
-? -?
Alan W. Klimek, P.E. Director
Division of Water Quality
June 2, 2005
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Higgins
Charlotte-Mecklenburg Schools
3301 Stafford Drive
Charlotte, NC. 28202
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan
On April 29, 2005, the Division of Water Quality (DWQ) received your revised Storm water management plan
dated April 21, 2005, prepared by your engineer, Mr. Bryan C. Metzler, P.E., of Turnbull Sigmon Design. The
following additional information is needed to enable us continue with the reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• BMP# 1, surface area, temporary pool, orifice diameter, and the draw down did not meet requirements.
• Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Sincerely,
Cyn i B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Bryan C. Metzler; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 stormwater more info, Mallard Creek High School 6-2-05
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httPJ;h2ox ic.state.nems ncwetlands
None Carolina
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MEMORANDUM
TO: John Dorney Regional Contact:
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name NIallard Creels High School
Project Number 04 1530
Recvd From APP
Received Date 9/13/04 Recvd By Region
Project Type institutional
Alan Johnson
RPx C-jIPasnn
111/211?nnd
County Mecklenburg
County2
Region Mooresville
Certificates Stream
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req.
IP water & FT-0 N [__ 13-17-5-5 F-c -F-30,711. 1.23 490.00
Mitigation Wetland
MitigationType Type Acres Feet
I F_ F F_
Is Wetland Rating Sheet Attached? O Y @N Did you request more info? O Y @N
Have Project Changes/Conditions Been Discussed With Applicant? oO Y 0 N
Is Mitigation required? Q Y O N Recommendation: DQ Issue 0 Issue/Cond 0 Deny
Provided by Region: Latitude (ddmmss) 352115 Longitude (ddmmss) 804600
Comments:
cc: Regional Office Page Number 1
Central Office
County
Facility Name Mallard Creek High School Mecklenburg
Project Number 04 1530 Regional Contact: Alan Johnson
Date: 10/21/2004
Comments (continued from page 1):
Stream 2@ Designated perennial in the application. No new impacts are proposed for this stream. However. an
existing culvert will be relocated to accornodate access to the school- The old culvert will be removed and the
stream restored to it original state
Stream I Was desionated intermittent in the application. Crayfish were observed approximately 30 ft.
downstream of the existino road crossing A salamander was also observed. Mitigation should be required for ? ?QU
that seom nt of stream channel below the road crossino (approxinnately 300 If). This channel is highly impacted
from stormwater discharges into the channel at the upper end. Large pools of water were observed in most of the
channel Numerous crayfish burrows were observed in the riparian area. The existing road crossing will be
relocated lpstream 4 storm;niater retention pond is to be constructed in the area vacated by the road crossing
Total impact. approximately 600 If
Stream 4m Located approximately 50 feet to the west of stream #3. Appears to be a natural stormwater channel.
Aproximately 15 -24 inches wide and 12 to 24 inches deep. No water was observed in the channel.
Approximately 100 If impacted
Wetland A (0.29 acre): Apparently a dug channel at the upper end of the pond. One may describe it as a
backwater. It also includes an emergent wetland at the upper end of the on (cat tails and willows, 0.29 ac.
9mpact)
Wetland B (0.04 acre): Located below the pond. Probably a result of overflow from the spillway of the pond and a
shallow water table (0.04 ac. impact).
Wetland C (3,87 acre): Bingham Swamp. This is considered an isolated wetland. However, because no im ap ets_
are proposed for this area, the site was not reviewed. The "swamp" extends beyond the prosy boundary and is
believed to be approximately 10 total acres in size, This area is proposed to be preserved for mitigation purop spss-
Wetland f1 E. F. • Not proposed for impact. thus not reviewed.
Wetland J (0.10 acre): The "tip" of the wetland is to be impacted (0.005 ac. impact).
Wetland 1 (0,26 acre): Isolated Impact is for the construction of one of three proposed soccer fields. It was
given a score of 26 points out of 100 on the wetland rating form by the applicant, 0.26 ac. impact, The soccer
fie propoCpd at this location is an addition to the park as are the other two soccer fields. Recommend that this
wetland he left intact,
Wetland K (0.04 acre): Located along the upper reach of stream #3. There is a high water table as evidenced by
the crayfish burrows, also influenced from the ctormwater discharge Jyst upstream of the area.
None of the wetlands appeared to he high quality. The hiohest score given by the applicant on the wetland rating
sheet was 42 points for wetland K The remainder scored between 20 and 31 points.
cc: Regional Office
Central Office Page Number 21
O?O? WA T F1?QG
7
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
April 7, 2005
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ Project # 04-1530
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mike Huggins
Charlotte-Mecklenburg Schools 3 hi
3301 Stafford Drive
Charlotte, NC. 28202 APR
Subject Property: Mallard Creek High School Project
REQUEST FOR MORE INFORMATION-Stormwater Management Plan ?.y
On October 5, 2004, the Division of Water Quality (DWQ) received your application dated October 5, 2004, to
impact 0.375 acres of 404 wetlands, 0.26 acres of isolated wetlands, 0.8 acres of ponds and 1153 feet of streams to
construct the proposed High School. The following additional information is needed to enable us continue with the
reviews of your application:
• New 401 Extended Detention wetland, and Level Spreaders worksheets for all ponds.
• The ponds are to meet the requirements of DENR's BMP manual, and 85% TSS removal for all
runoffs.
• Plans for each BMP, for the entire 97.52 acres, or 94.13ac as shown in your drainage basins.
• Clarification of the project actual area from the original 85 acres that was proposed. ---
it A summary of the present project states, status, activities, current impacts area amounts, and streams
impacts if any vs original stage at the initial application request. ,/
• Clarification of your section III on page 2 of 4, of your project data dated 12/10/04. "s
?' ?c? • Your draw down was calculated to be 1.5 days, instead of the required 2 to 5 days.
Please respond within three (3) weeks of the date of this letter by sending three (3) copies of this information in
\ writing. This letter only addresses the Stormwater Management Plan review and does not authorize any impacts to
wetlands or streams until the plans are approved. Please call Mr. Samuel A. Aghimien, at 919-733-3574 if you have
any questions regarding these issues.
Since
Cyndi B. Karoly
DWQ, 401 Oversight/Express Permitting Unit
CBK/SAA
cc: DWQ Mooresville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Sean Calloway; T.S.D; 1001 Morehead Square Drive, #530 Charlotte NC. 28203
Adam Karagosian; R.W.A, P.O. Box 35624, Charlotte, NC. 28235
04-1530 storrnwater more info, Mallard Creek High School 4-7-05
401 OversighUExpress Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet httpJ,h2o.enr.state.ne.us/ncwetlands
One Carol'
a
a r=
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00
1000 W. Morehead, Suite 200
Post Office Box 35624
Charlotte, NC 28235
[phone]
[phone] FAX
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Duluth, GA 30096
[phone]
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4348 Southpoint Boulevard
Suite 310
Jacksonville, FL 32216
[phone]
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10800 Midlothian Turnpike
Suite 302
Richmond, VA 23235
[phone]
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454S ' Anderson Road
Suite 135, BTC 517
Business Technology Center
Rock Hill, SC 29730
[phone]
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Raleigh, NC 27612
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6405 Metcalf
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[phone]
[phone] (Fax)
RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers Charlotte Atlanta Jacksonville Richmond Rock Hill Charleston
Raleigh Kansas City
To: N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd, Suite 250
Raleigh, NC 27604-2260
WE ARE SENDING YOU:

Date: 12/21/04 Job No. 3045-101
Attention: Cyndi Karoly
RE: DWQ Project #04-1530
Proposed Mallard Creek High School
Mecklenburg County, North Carolina
Attached Under separate cover Via FEDEX the following items:
Shop Drawings Prints Specifications
Copy of Letter Plans
Change Order Samples
Copies Date No. Description
1 12/04 1 Response to Corps of Engineers Comments
1 12/04 2 Revised Permit Drawings
1 12/04 3 Full-size Site Plan
DEC '?. R )nnn
Th ese are transmitted as checked belo w:
For Approval Approved as submitted
For your use Approved as noted
As requested Returned for corrections
For Bids Due For review & comment
Remarks
- -AL
AND STCF4'fWA
TER
Resubmit copies for approval
Submit copies for distribution
Return corrected prints
Prints returned after loan to us
Ms. Karoly,
The attached letter and accompanying drawings are being provided in response to your
letter, dated December 14, 2004, and the Corps of Engineers letter dated November 22,
2004. The Storm Water Management Plan was previously forwarded under separate
cover by Turnbull Sigmon Design. If you have questions, please do not hesitate to call
me at [phone]. Thank you. -Adam Karagosian
Copy to File Signed Cis
If enclosures are not as indicated, kindly notify us at nce
N!,PR0J\3045-1011corre sp1D W OTransmi ttalForrrFresponse.doc

Website:
www.rvvhitehead.com
1000 W. Morehead Street
Suite 200
Charlotte, NC 28208
Mailing Address:
Post Office Box 35624
Charlotte, NC 28235
704 372-1885 Voice
704 372-3393 Fax
RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers
Charlotte Atlanta Jacksonville Richmond
Rock Hill Charleston Kansas City Raleigh
December 21, 2004
Mr. Scott McLendon
U.S. Army Corps of Engineers
Asheville Regulatory Field Office
151 Patton Avenue, Room 2008
Asheville, North Carolina 28801-5006
k1k__7 IBY
DEC 2 8 2004
QUALITY
/DSAND SM11,TER 6RMv'CH
Subject: Request for Additional Information dated November 22, 2004
Proposed Mallard Creek High School
Mecklenburg County, North Carolina
USACE Action ID 200430232
DWQ Project #04-1530
Dear Mr. McLendon:
On behalf of Charlotte-Mecklenburg Schools (CMS), Ralph Whitehead
Associates, Inc. (RWA) is providing the following responses to your November
22, 2004 letter, and accompanying comment letters, regarding the Section 404
permit application for the proposed Mallard Creek High School, located off
Johnston-Oehler Road in Mecklenburg County, North Carolina. In addition, this
letter includes a summary of recent changes to the project, a number of which
resulted in reduced impacts, and corresponding revised permit drawings.
U.S. Army Corps of Engineers (USACE) letter, dated November 22, 2004
USACE Comment
Please provide additional information regarding avoidance and minimization
measures concerning the location of the proposed soccer fields. Specifically
address why the proposed soccer fields located to the west of the existing ball
field can not be moved to the east of the ball field and thereby eliminate
proposed impacts to Stream 3 and Stream 4.
C?

Response: CMS and Mecklenburg County Park and Recreation (MCPR)
have eliminated the tournament soccer field immediately west of the existing
ball fields from the proposed project (please reference Figure No. 8 of the
initial permit application, dated September 9, 2004). This soccer field, as
ll?0 initially proposed, would have resulted in impacts to Stream 3 and Stream 4.
This portion of the site will instead be converted to multi-use flex space for
multi-purpose uses. It should also be noted that the access road to the
\ existing soccer fields will not be realigned as originally proposed (compare
Figure No. 8-REV with Figure No. 8 of the application). Proposed grading in
this portion of the site will avoid impacts to Stream 3 in its entirety, as well.as
Wetland K. An undisturbed area will be maintained on both sides of Stream
3, generally ten feet wide. Flex space is important to the Mecklenburg
County Parks and Recreation Master Plan, and also provides an important
soil stockpile area for CMS. It is also important to provide this flex space in
close proximity to the existing and proposed soccer field, and the existing ball
fields, in order to allow connectivity of the park facilities and maximize the use
of existing park infrastructure.
Mr. Scott McLendon
December 21, 2004
Impacts to Stream 4 will be slightly increased as a result of additional grading/stockpiling
required. However, overall proposed impacts to unimportant streams in this area will
decrease from 663 If (0.054 acre) to 270 If (0.012 acre). Reference the attached Figure 8 -
REV.
USACE Comment
A final mitigation plan should also be submitted which addresses how you intend to provide
compensatory mitigation for the unavoidable impacts to stream channels associated with your
project. Based upon your application, the use of the North Carolina Ecosystem Enhancement
Program (NCEEP) or the City of Charlotte Umbrella Stream and Wetland Mitigation Bank were
proposed to provide the remainder of stream mitigation necessary. Please provide information
detailing which option you plan to pursue and the amount of stream channel credit that you
intend to pursue. An acceptance letter from NCEEP or the City of Charlotte's Umbrella Stream
and Wetland Mitigation Bank should be received by our office stating that they agree to provide
the necessary mitigation and have the necessary amount available.
Response: As stated above, impacts to Stream 3 have been avoided by eliminating the
tournament soccer field immediately west of the existing ball fields. In addition, impacts to
Stream 2 (perennial channel), resulting from the Bingham Road stream crossing, have been
reduced. The initial permit application submittal (dated September 9, 2004) proposed
impacts to 150 linear feet (If) of Stream 2 (reference Figure No. 7). In order to reduce
impacts, this road crossing has been realigned to cross the stream at the existing gravel
road crossing and culvert. The existing culvert will be removed, and the new culvert will be
placed over the existing culvert's footprint. As a result, impacts to Stream 2 have been
reduced to 64 If, excluding removal of the existing 33-foot culvert. Reference the attached
Figure No. 7-REV.
A temporary crossing of Stream 2 is proposed in order to maintain access to residences on
the west side of the channel. This crossing will be accomplished by spanning the channel
with a railroad flat car approximately 40 feet in length, equipped with guardrails, etc. This
temporary crossing would result in no stream impacts below the ordinary high water mark.
The contractor has confirmed that the flat car can accommodate emergency vehicles. This
temporary access will result in minor impacts to Wetland J (0.005 acre), which do not differ
from the impacts proposed in the initial permit application.
In order to mitigate for impacts to 64 If of Stream 2, CMS proposes to purchase mitigation
credit from the City of Charlotte's Umbrella Stream and Wetland Mitigation Bank, at a 1:1
ratio, for a total mitigation credit purchase of 64 If. Based upon recent discussions with Ms.
Amanda Jones of the U.S. Army Corps of Engineers (USACE), it is our understanding that
use of the City's bank is acceptable. The Mitigation Banking Instrument allows purchase of
credits for wetland and stream impacts in the Yadkin River Basin. Based upon recent
discussion with Mr. Jarrod Karl of the City of Charlotte, sufficient credits are available in the
City's bank to provide mitigation for 200 If of stream impact, in the event higher mitigation
ratios are required. A letter from the City of Charlotte, describing the availability of mitigation
credits and willingness to take on these mitigation obligations, will be forwarded upon
RWA's receipt.
Stream 1 was classified in the permit application as an aquatically important stream based
on evidence of aquatic life in a small pool at the upstream-most portion of the channel. The
remainder of the channel was dry, lacked sinuosity, and contained no evidence of aquatic
Page 2 of 9
Mr. Scott McLendon
December 21, 2004
life. Stream 1 was classified by Ms. Jones, as a fair-good quality stream. This channel has
been classified as intermittent by the NC Division of Water Quality (DWQ). DWQ has
indicated that they will not require mitigation for impacts to Stream 1.
MS proposes to mitigate for impacts to 340 If of Stream 1 through preservation of a stream
uffer along 1,545 If of Stream 2, an approximate 4.5:1 ratio (mitigation: impacts). The
pstream 659 feet of buffer on the west side of the stream will be 50 feet wide. The buffer
along the remainder of the west side of Stream 2 (886 If in length) will be 35 feet wide. The
entire stream buffer along the east side of Stream 2 has been adjusted to avoid conflicts
with an existing sanitary sewer easement. The buffer on the east side of Stream 2
(originally proposed to be 35 feet wide) will be an average of 35 feet wide, ranging in width
from 15 feet to 75 feet between the sewer easement and the top-of-bank of Stream 2. The
entire buffer along Stream 2 will be preserved and protected by a restrictive covenant.
Reference the attached Figure No. 11-REV.
USACE Comment
You have also proposed to preserve the remaining 9,580 linear feet of stream channel with a
35-foot riparian buffer along the remaining wetlands on the property through deed restrictions.
In this case, our preference is that a conservation easement or restrictive covenant be
appropriately recorded such that the property is adequately protected in perpetuity... Please
note that this office must approve the grantee of the conservation easement as well. Although
restrictive covenants may, in certain cases, provide an acceptable method of property
protection, we feel that a conservation easement is a better vehicle for insuring the biological
integrity of the site, as it would allow a conservation organization the opportunity to insure that
the site is being adequately managed. Please provide information to our office regarding your
preferred method of preservation.
Response: On behalf of CMS, RWA contacted the Catawba Lands Conservancy (CLC), via
telephone, regarding their willingness to accept, and manage, a conservation easement to
preserve Wetland C (3.87 acres). Wetland C is a portion of a larger regionally Significant
Natural Heritage Area known as the Bingham Road Hardpan Forest, which extends onto
several adjoining private properties. CLC indicated that it had little interest in a conservation
easement on a portion of the natural area because the protection of the remainder of
Bingham Road Hardpan Forest located off-site could not be ensured. However, CLC would
be willing to consider a conservation easement if CMS could purchase the entirety of
Bingham Road Hardpan Forest. CMS and the adjoining property owners failed to reach
agreements on the purchase of the adjacent properties, therefore the remainder of Bingham
Road Hardpan Forest cannot be secured by CMS (Note: sellers were asking exorbitant
amounts of money for their properties).
Since CLC will not likely accept a conservation easement, CMS proposes to preserve
Wetland C and the adjoining upland buffer, as indicated on Figure 10-REV, through a
restrictive covenant. In addition, CMS proposes to preserve the stream buffer along Stream
2 through the same restrictive covenant.
USACE Comment
Also, please submit additional information as to why a 50-foot riparian buffer could not be
included throughout the entire preserved portion of stream channel.
Page 3 of 9
Mr. Scott McLendon
December 21, 2004
Response: The relatively small size of the proposed school site (52-acres as compared to
60-70 acres for typical CMS high school sites) has resulted in the need to maximize use of
the site. Consequently, there is no space to shift elements in proximity to Stream 2, such as
the proposed baseball field, proposed practice field, and parking, away from the stream. In
addition, an existing sewer easement is located on the east side of Stream 2, limiting the
area available for stream buffer preservation. As a result, sufficient space is not available to
provide a 50-foot wide riparian buffer along the majority of Stream 2 (as depicted on Figure
No. 11 of the September 9, 2004 permit application). Adequate space is available to
provide a 50-foot wide riparian buffer on the west side of Stream 2, to the north of the
proposed baseball field, a length of approximately 659 feet. Reference the attached Figure
No. 11-REV. The buffer along the remainder of the west side of Stream 2 (886 If in length)
will be 35 feet. The buffer on the east side of Stream 2 (originally proposed to be 35 feet
wide) will be an average of 35 feet wide, ranging in width from 15 feet to 75 feet between the
sewer easement and the top-of-bank of Stream 2.
N.C. Division of Water Quality (DWQ) letter, dated November 3, 2004
On behalf of CMS, RWA responded to DWQ's comments in a letter dated November 23, 2004
(a copy of RWA's response was previously provided to the USACE).
U.S. Fish and Wildlife Service (USFWS) letter, dated November 1, 2004
USFWS Comment 1
...we encourage the development of an alternative that avoids impacts to streams and wetlands
on the property. Rearranging or realigning sports fields could significantly reduce impacts to
streams and wetlands. Maximizing the space for parking by building a small stacked parking
deck could reduce the impact area and thereby reduce impacts to aquatic systems. V
Response: Measures taken to avoid impacts to waters and wetlands have been discussed
above, and include eliminating the tournament soccer field adjacent to the existing ball
fields, resulting in the avoidance of impacts to Stream 3 and Wetland K, and realigning
Bingham Road, minimizing impacts to Stream 2. Given the small size of the site, the
designer considered stacked parking. However, due to student safety and security
concerns, stacked parking was determined by CMS to be impracticable.
USFWS Comment 2
We recommend reduced road widths and the use of grassed swales in place of curb and gutter
to convey storm water ...We also recommend on-site storm-water management (i.e.,
bioretention areas, rain gardens, and/or permeable pavement) that will result in no net change
in the hydrology of the watershed.
Response: The width of Bingham Road has been reduced, and curb and gutter will be
utilized to convey storm water. An on-site storm water management system has been
designed for the school site (Component 1) in general accordance with DWQ's Stormwater
Best Management Practices Manual (April 1999), and includes a forebay, wet detention
basin and level spreader. The proposed parking lot expansion to the east of Bingham Road
on the park expansion site (Component II) has been eliminated from the project, and only
pervious soccer fields will be constructed as part of Component II. There will be no increase
to impervious cover to the east of Bingham Road. Therefore, the wet detention basin and
Page 4 of 9
Mr. Scott McLendon
December 21, 2001
level spreader originally proposed to serve Component II has been removed from the plan.
The storm water management plan (SWMP) has been submitted to DWQ for review and
approval. No streams or wetlands will be impacted prior to DWQ approval of the SWMP.
There will be no direct change to the hydrology of Wetland C. This wetland is an isolated,
upland depression, supported by direct precipitation. Surface water on site currently drains
away from Wetland C, toward Stream 2; surface runoff/inflow is not considered a significant
input to Wetland C. Therefore, construction of the high school will not change current
surface hydrology to Wetland C.
USFWS Comment 3
Given the proximity of the project to aquatic environments, we want to emphasize that stringent
measures to control sediment and erosion should be implemented prior to any ground
disturbance and should be maintained throughout project construction. We strongly
recommend that only native plant species be used or, if an adequate seed source cannot be
found, that noninvasive species (such as annual rye) be used until native plants can reestablish
themselves.
Response: A State-approved erosion and sediment control plan will be implemented
throughout the project site, employing best management practices. Native plant species or
acceptable noninvasive grasses will be used to stabilize disturbed areas.
USFWS Comment 4
To reduce impacts to the streams and wetlands, forested buffers should be a minimum of 100
feet wide along perennial streams and 50 feet wide along intermittent streams and wetlands.
Response: Proposed Stream buffers are discussed above.
N.C. Division of Land Resources (NCDLR) memorandum, dated November 2, 2004
NCDLR Comment
The proposed project indicates a large amount of grading without leaving adequate room in or
near the downstream areas along the streams for adequate sediment control measures.
Grading is proposed to occur all the way to the stream buffer zone and would likely require
measures to be removed before grading could be completed likely leaving substantial area open
without adequate sediment control devices. In addition, to meet settling efficiency guidelines for
sediment traps and basins, large surface areas will likely be necessary to ensure sediment has
sufficient time to drop out of runoff prior to entering the streams. The proposed plans do not
appear to allow sufficient area for such basins especially in or near the proposed practice field,
the proposed baseball and softball fields, parking and stream crossings.
Response: NCDLR's comments were based on a schematic plan prepared for the Section
404 permit application. Since that time, construction documents for the Sedimentation and
Erosion Control Plan have been filed with NCDENR. The plan incorporates staged
construction to provide adequate storage volume and surface area outside the limits of the
SWIM Buffer. It is anticipated that any additional NCDLR concerns will be addressed
through the normal plan review process.
Page 5 of 9
Mr. Scott McLendon
December 21, 2004
Response to Concerned Citizens:
1. Julie and Scarr Cansler (Response to letter dated November 2, 2004):
Response: The development plan includes a permanent water quality basin to insure
that the quality of surface water is maintained. Stream 2 is presumed to be the primary
source for groundwater recharge and remains undisturbed. It is highly improbable that
either the quality or level of groundwater will be affected by the construction of the
proposed high school.
2. Joy Hipp (Response to letter dated October 19, 2004):
Response: The Hipp property is upstream of the subject site. The elevation of Ms.
Hipp's residence is approximately 750 feet, approximately 20 feet higher than that of
Stream 2. The proposed final elevation of the high school and associated facilities
ranges from approximately 740 feet - 760 feet. Although the development is extensive,
a large portion of the site consists of grassed athletic fields with relatively high
absorption rates due to the flat slopes and excellent ground cover. Furthermore, storm
water from the site is routed through the water quality basin which provide a measure of
storm water detention.
3. C. Ross Ritchie 111 (Response to letter dated: November 3, 2004)
Response: Johnston Oehler Road largely represents the ridge of the drainage basin. A
minor amount of surface water from the site currently flows through a culvert under
Johnston Oehler Road to a valley north of, and draining away from, the tributary leading
to Mr. Ritchie's pond. The area on the subject site draining through this culvert is less
than 5 acres in size. The vast majority of the subject site drains toward Stream 2. It is
generally presumed that groundwater flow roughly mimics surface water flow. However,
it does appear that Mr. Ritchie's pond is spring fed since it has a relatively small
drainage area. Wetland I is an isolated, upland depression likely created by an
impervious layer of clay. Consequently, the wetland area is not providing significant
groundwater recharge. Based on site topography and its position in the landscape,
water does not drain into this wetland. Topography indicates that it is supported by
precipitation that directly falls into it.
The concern for altering groundwater in this portion of the site has been the subject of
extensive discussion between the site designers and the soil testing engineer. For this
reason the applicant suggests a two part approach to protect Mr. Ritchie's interests.
First, the potential presence of high groundwater is an impediment to construction that
will be evaluated during construction. Test pits will be dug in the area in question prior to
grading to evaluate groundwater conditions. If warranted, proposed grades will be
adjusted accordingly. Second, to insure that these pits do not simply reflect dry weather
conditions, the project's soil testing firm has been asked to provide groundwater
monitoring borings during the current wet season to establish a better history of
groundwater fluctuations during an extended period.
Page 6 of 9
Mr. Scott McLendon
December 21, 2004
Summary of Plan Changes
Changes to Proposed Sty /amimpacts
Wetland Wetland Impacts Or
September 9, 2Q O4
Application Adf-es Revised Wetland
Impacts
Stream 1 340 340
Stream 2 150 64
Stream 3 557 0
Stream 4 106 270*
TOTAL 1,153 674
* Stream 4 was determined to be poor-fair/aquatically unimportant per USACE, and
intermittent per DWQ.
Changes to Proposed Wetlands/Waters Impacts

Wetland Wetland Impacts per
September 9, 2004
Application Acres Revised Wetland
Impacts
Wetland A 0.29 0.29
Wetland B 0.04 0.04
Wetland G 0.00 0.003*
Wetland 1 0.26 0.26
Wetland J 0.005 0.005
Wetland K 0.04 0.0
Stream 3^ 0.05 0.0
Stream 4 0.004 0.012
TOTAL 0.694 0.610
* An emergent wetland community will be temporarily impacted in Wetland G
for sanitary sewer line installation
^ Stream 3 was determined to be poor-fair/aquatically unimportant per USACE, and
perennial per DWQ.
+ Stream 4 was determined to be poor-fair/aquatically unimportant per USACE, and
intermittent per DWQ.
The following changes have been made to the site plan:
A turn lane has been added on the south side of Johnston Oehler Road, at Bingham
Road. In accordance with NCDOT requirements, adequate site lines will be
established, resulting in the removal of trees located in this clear zone. No additional
impacts to Wetland C will result. Reference Figure No. 5A-REV.
Bingham Road has been realigned in order to cross Stream 2 at the location of an
existing culvert and gravel road crossing. The existing 33-foot culvert will be
removed, and the new culvert will be placed over its footprint. As a result, impacts to
Stream 2 have been reduced from 150 If to 64 If, excluding removal of the existing
culvert. In addition, the width of Bingham Road has been reduced, resulting in a
reduction in impervious cover.. Reference Figure No. 7-REV.
The tournament soccer field, originally proposed to be constructed adjacent to the
existing ball fields, has been eliminated from the site plan. In addition, the entrance
road to the existing soccer fields will not be realigned as originally proposed. As a
result of these changes, impacts to Stream 3 and Wetland K have been avoided.
Impacts to Stream 4 (poor-fair/aquatically unimportant) in this area will increase
Page 7 of 9
Mr. Scott McLendon
December 21, 2003
slightly as a result of grading for a newly proposed flex space. However, overall
stream impacts (i.e., Streams 3 and 4 combined) in this area have been reduced from
663 If (0.054 acre) to 270 If (0.012 acre). Reference Figure 8-REV.
• The proposed expansion of the parking lot to the east of Bingham Road has been
eliminated from the site plan. As a result, no additional impervious area is proposed
on the park element of this project (Component II) (Compare Figure No. 5B-REV with
Figure No. 5B from the original application). Therefore, the storm water management
basin originally proposed to treat additional impervious area within the park element,
has been eliminated from the site plan. The storm water management basin on the
west side of Bingham Road remains.
• A walking trail has been added to the site plan, connecting the existing soccer fields
to an existing picnic area and parking lot on the south side of the existing ball fields.
Bridges will be installed at the trail's crossings of Streams 3 and 4. The 5K trail
originally under consideration has been eliminated due to lack of funding. This newly
proposed walking trail will be designed with the intent of upgrading it to a 5K trail in
the future (circa 2008). The walking trail currently proposed is largely contained
within developed portions of the park. Where the trail is proposed in the location of
existing wooded areas, e.g., south of the proposed tournament soccer field and multi-
use space, it will be field located to avoid mature trees. Reference Figures No. 4A-
REV to 5B-REV (Note: RWA reviewed the proposed trail location for waters of the
U.S. on December 14, 2004. No waters or wetlands were identified.).
• The preserved upland buffer around Wetland C has been reduced from 0.80 acre to
0.76 acre as a result of minor grading plan changes. Reference Figure No. 10-REV.
• The length of the stream buffer mitigation proposed along Stream 2 has been reduced
from 1580 If to 1545 If as a result of shifting the Bingham Road crossing further
upstream to the location of an existing culvert and gravel road crossing. Reference
Figure No. 11-REV.
• A 50-foot wide buffer has been added to the west side of Stream 2, north of the
proposed baseball field. This 50-foot buffer will be approximately 659 feet long. The
remaining buffer along the west side of Stream 2 (886 If in length) will be 35 feet
wide. The buffer will be protected by a restrictive covenant.
• The entire stream buffer along the east side of Stream 2 has been adjusted to avoid
conflicts with the existing sanitary sewer easement. The buffer on the east side of
Stream 2 (originally proposed to be 35 feet wide) will be an average of 35 feet wide,
ranging in width from 15 feet to 75 feet. The buffer will be the maximum width
available between the top-of-bank of Stream 2 and the edge of the sanitary sewer
easement. The buffer will be protected by a restrictive covenant.
• Minor temporary impacts to Wetland G are proposed in order to tie the high school's
sanitary sewer line to the sewer main parallel to Stream 2. The temporary impacts
will be to 0.003 acre of emergent wetland situated within the existing sewer
easement. This impacted area will be backfilled with topsoil excavated from the
wetland and allowed to naturally revegetate. Reference Figure No. 11-REV.
It should be noted that construction/denuded limits will not conflict with wetland boundaries,
except in proposed impact areas.
Q ?
Page 8 of 9
Mr. Scott McLendon
December 21, 2004
Closing
If you have any questions or need additional information concerning this project, please contact
either of the undersigned at [phone].
Sincerely,
RALPH WHITEHEAD ASSOCIATES, INC.
Adam H. Karagosiai4, W.S.
Project Scientist
cc: Mike Higgins, CMS
Cyndi Karoly, DWQ
Alan Johnson, DWQ-MRO
Brian Sigmon, TSD
File
AHK/MAI.ak
Michael A. lagnocco, P.W.S.
Project Manager/Senior Scientist
Page 9 of 9
LEGEND
SITE BOUNDARY ^?? J
EXISTING CON'T'OUR - \. • s-?? ?? •? ;
PROPOSED ?fA.TOR
CON-MUR
CONSTRUMON IIATUS \ \. w ZorcRO a on -m pAx 7w
? 231-
ow S.W.I.M. BUFFER \ Q? VACANT
'fo VACANT
'fc` \
PROPOSED STRE A?t
i i . i . i i - BUFFER 30..
I m \\ 1
/ - / ? ? m
MWO R-3
raa ?,. wgwr 1 V °?
aaE Fw.r
APPROXIMATE WETLAND fdDUNDAR ' ? ?;? •
(HOT SURVEYED)
\ - /•? 1 ?\
..? ?• M ?' y_ Wetiond Preserwtia+
Area
?S l/fit M
all
T
•
,
i
0 c>?
1
x
"
-
\ / 1
,
1
MATCHLINE SEE FIGURE 4B-REV
UAir
125 2,50 - 12/22/04
PROPOSED MALLARD CREEK HIGH SCHOOL 250 GRAPHI0 SCALE
SITE PLAN JLs
Mecklenburg County, N.C. ( IN FEET) W.• ?.
I inch - 250 fL 4A-REV
MATCHLINE SEE FIGURE 4A-REV
I
-CONS C_
,f
IT Q-Z 0;
13
w
j?gONSTRUCW I
\
/
i
zowo 4-3
? swt near
i
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20.ED p-J I _ --? \-? I 71, 1 ..
VACAN
\ \
/ VA %
i
_ ,i
LEGEND
\
rr L/
SMEBOUNDARY
Etzrm
PXWAWA
FMSTI\O CONTOUR
i
PROPOSEDALVOR
CONTOUR - f"...TTT \
LAI L:
CONSTRUCTION UMITS PROPOSED MALLARD CREEK HIGH SCHOOL GRAPHIC SCALE , 2/22i04
250 0 125 250 bIwrrr+ur.
. - .. - - - .. SACi.\f. SUFFER SITE PLAN J_S 11M M" v --I uat...?t, ?r.
PROPOSED STREAM Mecklenburg County, N.C. IN FEED
BUFFER I inch = 250 M 4B-REV
LEGEND
250 b Nly,
PROPOSED MALLARD CREEK HIGH SCHOOL 250 GRAPHIC SCALE
SrFE BOU,DARY IMPACT AREAS Jas
Exlm,GCOVMUR Mecklenburg County, N.C. ( IN FEET )
1 inch 2501E 5A-REV
CO,STRUMON I.nlns
SM.I.M. BUFFER
PROPOSED STREA-31
BUFFER
1
f
.? IDIPACTED WATERS
ANDIVETIANDS
l PROPOSED UPLUND ?!'
R ......_ _... ` `C.ro '
L ° ..J BUFFER \\ R
`?-?XX ] WWM?
mm 446Z poa 7w
[J 6L'FFER 1IITIG.1MON ?O , (? V? ? 2 C29-33 -o
]
VACAW
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HY TURN LANE
RG iA77DtSDY • ?.
?a ` mm aio 1 \ y' \
soc" May
APPRIMMATEWETLAND SOUNDAR
!',a \
(NOT SURVEYED)
roy'/ - ?+
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Area
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ND ? I
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IMP ll.26 ACRE
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MATCHLINE SEE FIGURE 5B-REV
MATCHLINE SEE FIGURE 5A-REV
v.
1
o.
i
U 1, If,
STREAM Z IMPORTANT
x'
J,545 ?-
G T/ON LENGT?I
I r
: LF?
I ? ? •?``!t??\ ?-`? ems" ? V??, ? ? '?? ? ? ? ?? ? ? ? ? ? ? -? ?
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ONSTRUOTI2fI
h STREAM
PERENNIAL PER DWQ o? 1
ZONED N-3
vRZt r.rr ?' { .A ' _ A STREA 4•UNIMPORTANT ' ??
i I L? 4: iw ?V?? IMPACT EA-D.D12'ACR \
'GTH: Z^D LF
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a 0C?Tf0f1 DF - - ? -
PRdPOSED nArVR
,
? : ` CRCIBSfNG - t _
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o• 1M13A AREA: 0.0p5ACRE
$TREAM 2-IMPORTANT
Ca aEa ' IMPACT LENGTH: 64LF • -°"r \ _
\ ` \
jz?
ZONED R-3
VACANT
_ r
LEGEND
SITE BOUNDARY
FMSTINOCONTOUR
%
CONSTR17MON LIAIIl•S
.. .. 9AY.I,A1. BUFFER \ I_ -, / / /// / \\ - f l•? , V _-' j /
PROPOSED STRECNI Eurm
BUFFER IPUZACAWA
a
IMPACTED{PATERS C? Jly't \ _ - / ? / /'''? 1 - //
AND WETLA.\ DS '
GAIL
125 250 -lNtizzioa
PROPOSED MALLARD CREEK HIGH SCHOOL 250 GRAPHIC SCALE
i ---1 PROPOSED UPLA.\D 7?,{
BUFFER lT1I1PACT11?.GLY?7 n*. ? JLS
® PROPOSED STREIAI
BUFFER AIFFIQMON Mecklenburg County, N.C. ( IN FEET) I inch - 250 ft 58-REV
i B , S PARKI
r 7-1
F -? ,
6 L _?L______I J
L_ L _j AEI D' °A
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.29? / ----__-
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PO_ ND/OP N AT Fps ?? III C / _-??
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PROPOSED=
STADIUM
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i.
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I
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,I
PRAC i FIELD%
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--
it
WETLAND ?uB ,
IMP CT AREA: 0.0 AC .,,E
1
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_ I
> ' S REAM 1--1 MP0 TA T " f
IMRACT LENGTH:` 40 LF I
LEGEND
I
III?II, I - __
I
-r
BOUNDARYLINB
l J'
PERENNW.STREA37
- IMPORTANT STREAM
YES \ i ._.. ? r _..- ?-
! ml??1 .. UNIMPO RTANT STR&A-51
v : \ J / v t
ISOIATED«"ETIAND
'( I JURISDICTIONAL
3 \ , ?fr1{' _ _ L WETLAND
OPEN {PATER
PROPOSED UPLAND
v / L?J
t 'V '?? ? BUFFER
w PROPOSEDSTREA111
BUFFER MITIGATION
;$ GRAPHIC SCALE '12/22/04
PROPOSED MALLARD CREEK HIGH SCHOOL too 0 so 100
JLS
IMPACT AREAS -HLLK[U NV
3
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TAX NUMBER: 029-331-1 REA? ,2-IMPORTANT
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a , WNbY:
PROPOSED MALLARD CREEK HIGH SCHOOL 100 GRAPHI0 SCALE50 100 IU
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12/22/04
PROPOSED MALLARD CREEK HIGH SCHOOL GRAPHIC SCALE .
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v DEED 2793, PAGE 581
TAX NUMBER: 029-331-08
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PROPOSED COMPENSATORYMITIGATION 150 o 75 150 lwnJ?S Eami AND UPLAND BUFFER PRESERVATION `""KLUbY.
STREAM 2 IN FEET w„.E-.
I inch = 150 M 11-REV
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Land Resources
LAND QUALITY SECTION
James D. Simons, PG, PE Michael F. Easley, Governor
Director and State Geologist William G. Ross Jr., Secretary
MEMORANDUM
DATE: 11/02/2004
TO: BOYCE HUDSON, 404 COORDINATOR
MS. AMANDA JONES, US ARNfY CORPS OF ENGINEERS, ASHEVILLE,
OFFICE
FROM: G. DOUGLAS MILLER, P.E.
RE: USACOE PUBLIC NOTICE FOR ACTION NO. 200430232- CHARLOTTE MECKLENBURG SCHOOLS
REPLY
No comment.
X An erosion and sedimentation control plan is required.
X Comments on this project are below.
Comments on this project are attached.
This office objects to the project as proposed.
121 ?20WO 0
D
NOV 0 3 2004
DFt;t<- VVATTER QUgA-LITDY,
Y 7 ETIr?J L?.'' 3 n''c G J I Gf :I?rl Y?A I CR Ei {ryt??H
Comments: The proposed project indicates a large amount of grading without leaving adequate
room in or near the downstream areas along the streams for adequate sediment control
measures. Grading is proposed to occur all the way to the stream buffer zone and would
likely require measures to be removed before grading could be completed likely leaving
substantial area open without adequate sediment control devices. In addition, to meet
settling efficiency guidelines for sediment traps and basins, large surface areas will likely
be necessary to ensure sediment has sufficient time to drop out of runoff prior to
entering the streams. The proposed plans do not appear to allow sufficient area for such
basins especially in or near the proposed practice field, the proposed baseball and
softball fields, parking and stream crossings.
SIGN DATE
919 North Main Street, Mooresville, North Carolina 28115 • Phone: [phone] / FAX: [phone]
An Equal Opportunity 1 Affirmative Action Employer - 501,6 Recycled 110% Post Consumer Paper

Website:
vwwv.rwhitehead.com
1000 W. Morehead Street
Suite 200
Charlotte, NC 28208
Mailing Address:
Post Office Box 35624
Charlotte, NC 28235
704 372-1885 Voice
704 372-3393 Fax
RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers
Charlotte Atlanta Jacksonville Richmond
Rock Hill Charleston Kansas City Raleigh
November 23, 2004
R ?c?goepm a
NOV 2 9 2004
DEhR -'HATER QUALITY
Mr. John Dorney t'rEnU,IXS90STCRM ATERBRMNCH
North Carolina Department of Environment and Natural Resources
Division of Water Quality
401 Wetlands Certification Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, North Carolina 27604
Subject: Request for More Information dated November 3, 2004
Proposed Mallard Creek High School
Mecklenburg County, North Carolina
DWQ Protect #04-1530
Dear Mr. Dorney:
On behalf of Charlotte-Mecklenburg Schools (CMS), Ralph Whitehead
Associates, Inc. (RWA) is providing the following responses to your November 3,
2004 letter regarding the Section 404/401 permit application for the proposed
Mallard Creek High School, located off Johnston-Oehler Road in Mecklenburg
County, North Carolina.
Comment 1
Compensatory stream mitigation: As DWQ staff have discussed with your
consultant, DWQ will require stream mitigation at a 1:1 ratio for the 300 feet of
impact to stream #3 below the proposed road crossing. Please submit a plan for
this mitigation.
Response: CMS and Mecklenburg County Park and Recreation (MCPR)
have eliminated the tournament soccer field, which was proposed to
impact Stream #3, from the proposed project (please reference Figure No. 8
of the initial permit application, dated September 9, 2004). This portion of
the site will instead be converted to flex space for multi-purpose uses. It
should also be noted that the access road to the existing soccer fields will
not Le r aaliCJ. neu as originally proposed 'con. par c Figure No. 313 and Figure
No. 513 of the application). Proposed grading in this portion of the site will
avoid impacts to Stream #3, therefore compensatory stream mitigation will
not be required. Ten-foot buffers will be maintained on both sides of
Stream #3.
In addition, impacts to Stream #2 (perennial channel), resulting from the
Bingham Road stream crossing, have been reduced. The initial permit
application submittal (dated September 9, 2004) proposed impacts to 150
linear feet (If) of Stream #2 (reference Figure No. 7). In order to reduce
impacts, this road crossing has been realigned to cross the stream at the
location of the existing gravel road crossing and culvert. As a result,
impacts to Stream #2 have been reduced to 110 If.
Mr. John Dorney
November 23, 2004
Since total perennial streams impacts on-site have been reduced to less than 150 If, no
compensatory stream mitigation is required by DWQ.
Revisions to the site plan are currently being prepared by Turnbull Sigmon Design, on?
behalf of CMS.
omment 2
Stormwater ponds: You have proposed to use wet detention ponds and level spreaders to treat
the runoff from this site which is acceptable to DWQ. Please be aware that fina written
approval of your stormwater plan will be needed before stream or wetland impact occurs.
Response: As a result of the removal of the tournament soccer field, and the removal of
the proposed parking lot from the park expansion plan, impervious area on Component II
(as described in the September 9, 2004 pormit application), will remain at its existing
11%. Therefore, the proposed storm water basin situated adjacent to the proposed
tournament soccer field has been eliminated from the site plan (reference Figure No. 413
of the permit application).
CMS will submit a storm water management Ian SWMP for DWQ review and approval
prior to impacting any s reams or wetlands on t e project site. The SWMP will involve a
wet detention basin and level spreader to serve the school site (Component I, as
Q escri bed in a permit application ,w is as 41% impervious area the west side of,
and including, Bingham Road.
Comment 3
From recent discussions with Mr. Doug Miller of the DLR Mooresville Regional Office, it appears
that there is not sufficient room in the site plan to install erosion and sediment control measures
outside the SWIM buffer. Please address this issue in a revised submittal.
Response: Preliminary Erosion and Sedimentation Control (E&SC) plans, prepared by
Turnbull Sigmon Design, have eliminated potential encroachment into the Mecklenburg
County Surface Water Improvement and Management (SWIM) buffer along Stream #2,
except at the proposed stream crossing of Bingham Road. Encroachment into the SWIM
buffer as a result of the stream crossing of Bingham Road will adhere to the Mecklenburg
County SWIM ordinance.
It is anticipated that revised site and E&SC plans illustrating the above responses will be
submitted to your attention on or before December 7, 2004. In the interim, your continued
processing of this 401 Water Quality Certification will be greatly appreciated.
Page 2 of 3
. ,
Mr. John Dorney
November 23, 2004
If you have any questions or need additional information concerning this project, please contact
either of the undersigned at [phone].
Sincerely,
RALPH WHITEHEAD ASSOCIATES, INC.
Adam H. Karagosian W.S.
Project Scientist
Michael A. I
Project Mar
?qbco, P.W.S.
er/Senior Scientist
cc: Mike Higgins, CMS
Alan Johnson, DWQ-MRO
Amanda Jones, USACE
Brian Sigmon, TSD
File
AHK/MAI.ak
Page 3 of 3
00
1000 W. Morehead, Suite 200
Post Office Box 35624
Charlotte, NC 28235
[phone]
[phone] FAX
3505 Koger Blvd., Suite 205
Duluth, GA 30096
[phone]
[phone] FAX
4348 Southpoint Boulevard
Suite 310
Jacksonville, FL 32216
[phone]
[phone] FAX
10800 Midlothian Turnpike
Suite 302
Richmond, VA 23235
[phone]
[phone] FAX
454 S. Anderson Road
Suite135, BTC 517
Business Technology Center
Rock Hill, SC 29730
[phone]
[phone] FAX
105 Wappoo Creek Drive
Suite 4A
Charleston, SC 29412
[phone]
[phone]
3301 Woman's Club Drive
Suite 111
Raleigh, NC 27612
[phone]
[phone] FAX
6405 Metcalf
Suite 516
Overland Park, KS 66202
[phone]
[phone] (Fax)
RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers Charlotte Atlanta Jacksonville Richmond Rock Hill Charleston
Raleigh Kansas City
To: N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd, Suite 250
Raleigh, NC 27604-2260
WE ARE SENDING YOU:
LIEUTF? (0 F U 1, H, 2.1H?UTG?L
Date: 9/10/04 Job No. 3045-101
Attention: John Dorney
RE: Individual Permit Application
Proposed Mallard Creek High School
Mecklenburg County, North Carolina
Attached Under separate cover Via FEDEX the following items:
Shop Drawings Prints Specifications If ,ar
Copy of Letter Plans
Change Order Samples
Copies Date No. Description
4 9/9/04 1 Individual Permit Application Package
1 9/10/04 2 Permit Application Fee ($475)
These are transmitted as checked below:
For Approval Approved as submitted
For your use Approved as noted
As requested Returned for corrections
For Bids Due R For review & comment
Remarks
PAYMEINT
RECEIVED
00
Resubmit copies for approval
Submit copies for distribution
Return corrected prints
Prints returned after loan to us
John, attached, please find four copies of the Section 404 Standard Individual Permit
Application Package and appropriate Section 401 Water Quality Certification fee
payment for the Proposed Mallard Creek High School, located in Mecklenburg County,
North Carolina. Three additional copies have been forwarded under separate cover.
Please note that Charlotte-Mecklenburg Schools is also requesting a State Isolated
Wetlands Permit by way of this application. If you have questions, please do not
hesitate to call me at [phone]. Thank you. -Adam Karagosian
Copy to File Signed 4??2
If enclosures are not as indicated, kindly notify us at ce
N:\PROJ%3045-101tcorresp\DWQTransrrttalFortn-perm t app.doc
00
1000 W. Morehead, Suite 200
Post Office Box 35624
Charlotte, NC 28235
[phone]
[phone] FAX
3505 Koger Blvd., Suite 205
Duluth, GA 30096
[phone]
[phone] FAX
4348 Southpoint Boulevard
Suite 310
Jacksonville, FL 32216
[phone]
[phone] FAX
10800 Midlothian Turnpike
Suite 302
Richmond, VA 23235
[phone]
[phone] FAX
454 S. Anderson Road
Suite135, BTC 517
Business Technology Center
Rock Hill, SC 29730
[phone]
[phone] FAX
105 Wappoo Creek Drive
Suite 4A
Charleston, SC 29412
[phone]
[phone]
3301 Woman's Club Drive
Suite 111
Raleigh, NC 27612
[phone]
[phone] FAX
6405 Metcalf
Suite 516
Overland Park, KS 66202
[phone]
[phone] (Fax)
RALPH WHITEHEAD ASSOCIATES, INC.
Consulting Engineers Charlotte Atlanta Jacksonville Richmond Rock Hill Charleston
Raleigh Kansas City
To: N.C. Division of Water Quality
Wetlands/401 Unit
2321 Crabtree Blvd, Suite 250
Raleigh, NC 27604-2260
WE ARE SENDING YOU:
JJ U ll ER lJF U Z-U1207UA= L
Date: 9/10/04 Job No. 3045-101
Attention: John Dorney
RE: Individual Permit Application
Proposed Mallard Creek High School
Mecklenburg County, North Carolina
Attached Under separate cover Via FEDEX the following items:
Shop Drawings Prints Specifications
Copy of Letter Plans
Change Order Samples
Copies Date No. Description
3 9/9/04 1 Individual Permit Application Package
WETLANDS/ 401 GROUP
WATER QUALITY
These are transmitted as checked below:
For Approval Approved as submitted
For your use Approved as noted
As requested Returned for corrections
For Bids Due For review & comment
Remarks
Resubmit copies for approval
Submit copies for distribution
Return corrected prints
Prints returned after loan to us
John, attached, please find three copies of the Section 404 Standard Individual Permit
Application Package for the Proposed Mallard Creek High School, located in
Mecklenburg County, North Carolina. Four additional copies and the appropriate
Section 401 Water Quality Certification fee payment have been forwarded under
separate cover. Please note that Charlotte-Mecklenburg Schools is also requesting a
State Isolated Wetlands Permit by way of this application. If you have questions, please
do not hesitate to call me at [phone]. Thank you. -Adam Karagosian
Copy to File Signed
If enclosures are not as indicated, kindly notify us at ce
N:IPROJ13 0 4 5-1 0 11corresp%DWQTransrrttalForm-perm t app2.doc
DWQ# Date Who Reviewed:
Plan Detail Incomplete
? Please provide a location map for the project.
? Please show all stream impacts including all fill slopes, dissipaters, and bank stabilization on the site plan.
? Please show all wetland impacts including fill slopes.on the site plan.
? Please indicate all buffer impacts on the site plan.
? Please indicate proposed lot layout as overlays on the site plan.
? Please indicate the location of the protected buffers as overlays on the site plan.
? Please locate all isolated or non-isolated wetlands, streams and other waters of the State as overlays on the site plan.
? Please provide cross section details showing the provisions for aquatic life passage.
? Please locate any planned sewer lines on the site plan.
? Please provide the location of any proposed stormwater management practices as required by GC
? Please provide detail for the stormwater management practices as required by GC
? Please specify the percent of project imperviousness area based on the estimated built-out conditions.
? Please indicate all stormwater outfalls on the site plan.
? Please indicate the diffuse flow provision measures on the site plan.
? Please indicate whether or not the proposed impacts already been conducted.`
Avoidance and/or Minimization Not Provided t
? The labeled as on the plans does not appear to be necessary. Please eliminate the or provide additiohal
information as to why it is necessary for this project.
? This Office believes that the labeled on the plans as can be moved or reconfigured to avoid the impacts to the
. . Please revise the plans to avoid the impacts.
? This Office believes that the labeled on the plans as can be moved or reconfigured to minimize the impacts to the
Please revise the plans to minimize the impacts.
? The stormwater discharges at the location on the plans labeled will not provide diffuse flow through the buffer because
Please revise the plans and provide calculations to show that diffuse flow will be achieved through the entire buffer. If it
is not possible to achieve diffuse flow through the entire buffer then it may be necessary to provide stormwater management
practices that remove nutrients before the stormwater can be discharged through the buffer.
Other
? The application fee was insufficient because over 150 feet of stream and/or over 1 acre of wetland impacts were requested. Please
provide $ . This additional fee must be received before your application can be reviewed.
? Please complete Section(s) on the application.
? Please provide a signed copy of the application.
? Please provide copies of the application, copies of the site plans and other supporting information.
Mitigation
? of compensatory mitigation is required for this project. -Please provide a compensatory mitigation plan. The
plan must conform to the requirements in 15 A NCAC 211.0500 and must be appropriate to the type of impacts proposed.
? Please indicate which 404 Permit the USACE would use to authorize this project.
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/ ,Wetlands Area"A" ~ i PROPOSED WATER QUALITY BASIN ~ ~ ~f1}..il/'. V.+~'I^... Ytt IY F:" V.N.
wI / , , ~ Impact Area = 0.29 ac i/' ~ REQUIRED SURFACE AREA: 21,780 SF
~ ~ ,PROVIDED SURFACE AREA: 22,264 SF ~ ~
` SAIDA RATIO USED:1.09 ~ i ~'1 ~ l ~ 1
~LEV L SPREADER ' ~ POND DEPTH : 8 FT. ~ O 8596 TSS REMOVAL 1 ~ ~ i,
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~ 1 ~ I 1 \ ~ / - ~ i I CI~1 YI~2 762.00 759.50 29 15 inch 0.0862 0.0862 17 9 MH OA 736.95 736.68 54 15 inch 0.0050 YI 5 MH 8 728.69 728.38 81 15 inch 0.0051 11/114 MH~115 723.50 718.50 44 15 inch 0.1136
\ I 1 \ t - ~ \ ~ \ I ~ ~ , Y1~2 Y1~3 759.30 758.61 137 15 inch 0.0050 0.0050 MH~40A YI/40B 736.68 736.47 42 15 inch 0.0050 MH~76 MH~77 745.31 744.98 88 15 inch 0.0050 MH~115 FES/116 713.95 713.80 29 15 inch 0.0052
~ ~ ( \ i ~ YI 3 CI 758.41 758.07 67 15 Inch 0.0051 0.0051 YI/40B YI/41 736.47 736.05 83 15 inch 0.0051 MH/77 MH/78 744.78 743.32 84 15 inch 0.0228 YI 17 FES~118 718.31 718.00 61 15 inch 0.0051
f ^ - - \ ~ \ ~ \ \ J CI~4 CIS 757.82 757.55 54 18 Inch 0.0050 0.0050 11/41 YI#43 735.80 735.38 63 16 inch 0.0051 MH~78 MH/80 742.87 742.28 82 18 inch 0.0072 q 119 q 20 716.55 716.41 27 15 inch 0.0052
/ \ \ ,J ~ ~ \ J ! CI CI 757.35 756.72 126 18 inch 0.0050 1 ~ ~ . ~ \ \ \ 0.0050 YI~42 YI/43 735.75 735.63 24 15 inch 0.0050 MH~79 MH#80 743.75 742.53 122 15 inch 0.0100 CI~120 HW/1268 713.53 713.50 7 15 inch 0.0043
- - - ` ` ~ \ ( ( ~ CI~6 CI~5 760.00 757.60 75 15 inch 0.0293 0.0293 YI~43 MH~145A 735.38 735.15 46 18 inch 0.0050 MH~80 YI/81 742.08 740.25 63 18 inch 0.0290 YI 121 FES 22 717.18 717.00 36 15 inch 0.0050
A ~ ~ ~ 0 1 1 1 ~ 1i 4 24 inch 0.0050 - ~ ~ \ CI~7 DCI~B 756.22 755.5 136 _ ~ / \ \ 1 1 0.0050 MH~145A YI/458 735.15 734.90 49 18 inch 0.0051 YI 1 DI 5 740.05 732.35 249 18 inch 0.0309 q~123 FES~124 721.33 721.20 25 15 inch 0.0053 ~ its
^ T' / - ~ \ ~ \ 1 ~ , DCI CI~10 754.54 753.36 236 36 inch 0.0050 0.0050 YI B YI 734.90 734.46 87 18 inch 0.0051 DI~82 MH/83 737.68 736.89 57 15 inch 0.0139 FES~129 q/130 756.15 755.04 40 18 inch 0.0278
\ , ~ ~ ~ \ i j / r' HW#s DCI~B 757.50 756.04 24 161nch 0.0608 0.0608 YI~t46 MH~137 733.96 733.64 64 24 inch 0.0050 MH/83 YI~4 736.69 735.70 108 15 inch 0.0092 q~130 FES~131 754.14 754.00 28 18 inch 0.0050
~ / ~ \ \ i / ~ - CI 10 DI 13 753.16 750.66 201 36 inch 0.0124 0.0124 YI 7 YI 737.62 734.71 72 15 inch 0.0404 YI~84 DI~BS 735.45 732.35 181 18 inch 0.0171 MH 1328 TD 744.24 744.06 18 18 inch 0.0100
/ / ` \ \ \ / \ ~ ~ ~ CI~11 CI~10 757.50 757.00 65 15 inch 0.0077 ~ \ ~ ~ r \ \ I ~ 1 CI 12 CI 10 758.00 757.00 61 15 inch 0.0164 0.0077 YI~148 YI~49 737.50 736.50 45 15 inch 0.0222 DI~5 DI~86 731.85 728.89 119 24 inch 0.0249
\ / ~ \ \ 1 \ ~ ~ 0.0164 YI/49 q~i1 730.45 728.00 140 54 inch 0.0175 DI q 7 728.89 726.90 7I 24 inch 0.0290
~ \ / \ \ t ~ / ~ ~ ` DI#13 MH~16 750.16 749.63 106 42 inch 0.005 0.0050 CI~50 CI~51 736.09 731.75 63 15 inch 0.0689 CI 7 MH 726.90 726.63 54 36 inch 0.0050
\ \ \ / \ \ ! \ / \ r--'%' \ DCI~14 DI~13 752.65 751.66 197 24 inch 0.0050 0.0050 YI~;i2 YI~53 726.96 726.55 81 15 inch 0.0051 MH~88 CI~69 726.63 726.03 119 42 inch 0.0050
r I \ ~ 1 / ~ ~ y _ \ MH~15 DCI~14 756.80 753.40 94 15 inch 0.0362 t H T ~'f-~ R 0.0362 CI 1 YI 3 726.30 725.50 30 54 inch 0.0267 726.03 725.92 21 42 inch 0.0052 TO INVERT IN INVERT OU LENGTH SIZE SLOPE CI 9 CI 0
t I ~ t ~ \ - , ~ r ~ MH 16 YI~21 749.43 748.72 142 42 inch 0.0050 0.0050 YI~53 MH~l54 725.50 724.46 207 54 inch 0.0050 CI 0 CI 1 725.92 725.38 107 42 inch 0.0050 AYI/133 AYI~134 748.67 748.45 22 8 inch 0.0100 r ~ ~ .
ti ;rr \ ~ ~ ~ ` \ / t CI~17 DI~18 760.20 759.67 105 15 inch 0.0050 0.0050 MH~54 FES~55 724.46 724.21 50 54 inch 0.0050 C1~91 C1~92 725.38 724.95 85 42 inch 0.0051 AYI 34 AYI 38 748.45 745.79 27 8 loch 0.0985 ,
y i ( ~1~ ~ ` ~ } / DI~18 YI~19 759.47 755.40 51 15 inch 0.0798 AYI~135 AYI 36 748.58 746.18 40 121nch 0.0100 0.0798 YI~56 YI~l57 737.50 737.02. 96 15 inch 0.0050 CI~92 YI~93 724.95 724.72 45 42 inch 0.0051 ,
1`'~~''ti°p^~ -s----~'` \ YI 19 YI 20 755.20 754.66 108 15 inch 0.0050 _ = ~ v? r,_, fem... 0.0050 YI 7 YI 8 737.02 736.64 76 15 inch 0.0050 YI 3 CI 4 724.72 724.28 88 42 inch 0.0050 AYI 36 AYI 37 745.91 745.51 40 15 loch 0.0100 , #5 ~ ~ ~
~ ~ _ _T~. ,x~,~: , / / \ / t / YI~20 MH~16 754.46 753.36 55 15 loch 0.0200 0.0200 ~ Y1~58 YI/61 736.64 736.12 103 15 inch 0.0050 CI 4 FES 5 724.28 724.07 42 42 inch 0.0050 AYI 37 AYI 38 745.51 745.21 30 15 Inch 0.0100 • ~ 11~ .
~ \ ~ ~ ~ \ / \ I YI 21 YIyy22 748.52 748.12 79 42 inch 0.0051 fy^ / 4 ~ ~ i~ ~ p 0.0051 YI~59 YI~160 737.50 736.94 111 15 loch 0.0050 18 inch 0.0050 AYI~138 AYI~142 744.98 744.52 44 18 inch 0.0100 ; STl 6 Sli 7 757.00 756.74 52
/ 1 ~ ~ ~ / \ YI~22 MH~24 747.92 747.49 85 42 inch 0.0051 0.0051 YI~O YI~61 736.74 736.12 107 15 inch 0.0058 B 756.54 747.88 44 18 inch 0.1968 AYI 39 AYI 40 748.25 747.85 40 10 inch 0.0100 • STl 7 MH ,
}r r \ . _ ` / ~ \ YI 23 YI 22 752.72 752.32 40 15 loch 0.0100 ! ~ - - ~ 1 \ 0.0100 YI 1 MH 2A 735.87 735.63 47 18 inch. 0.0051 MH 8 YI 9 747.68 746.96 143 18 inch 0.0050 A11 40 AYI 41 747.88 747.28 40 12 Inch 0.0100 ; ~ ~
\ ~ - ~ / / MH 24 CI 6 747.29 743.30 139 42 inch 0.0287 \ / ~ / ~ ~ ~ y ~ 1 0.0287 MH 2A YI 2B 735.63 735.44 37 18 inch 0.0051 YI 9 YI 01 746.96 746.25 141 24 inch 0.0050 AYI 41 AYI 42 747.28 745.02 30 12 loch 0.0753 ~ ~ ~ ~ 0.0100 '
/ _ ~ / J E ~ 1 ~ i \ ~ I YI~25 S11~26 754.70 753.50 45 15 inch 0.0267 0.0267 YI 2B YI 3 735.44 735.02 83 18 inch 0.0051 YI 00 YI Ot 748.99 746.25 148 15 inch 0.0050 AYI 42 MH 328 744.52 744.24 28 16 inch Charlotte-Mecklenburg Schools , ~ ~
( - ^ f t{ - f - / S11~26 MH~27 752.75 752.39 71 24 inch 0.0051 0.0051 Y1~63 YI/64 734.52 734.10 83 24 inch 0.0051 Y1~101 Y1~102 746.25 745.49 151 24 inch 0.0050 ,
1 r / 1 1 1 t a_. r~ ~ / 75 . 7 .73 211 24 inch o.oass I / ~ r 1 ~,.?l ~ l ~ s~ x ~ i. ~ 1 / / MH~27 YI 28 219 50 0.0069 YI 4 MH BA 734.10 733.86 48 24 loch 0.0050 YI 02 MH 06A 745.49 744.60 178 24 inch 0.0050
- ~ 1 ` r 11 ~ ; ~ °";\P y ~ ~ I / f YI~28 YI~130 750.53 748.00 84 24 loch 0.0301 0.0301 YI/65 YI~666 739.50 737.00 29 15 loch 0.0862 YI~103 YI 104 746.92 746.04 178 15 inch 0.0050 ,
, ~ ~ . ~1 _ err - , ! J 11 9 YI 0 749.13. 748.75 42 15 inch 0.0090 0.0090 MH/66A YI~66B 733.66 733.68 36 24 inch 0.0050 YI~104 YI~105 746.04 745.23 182 15 inch 0.0050 FROM TO INVERT IN NVERT OU LENGTH SIIE SLOPE .
l 1 ~ / YI 0 MH 3 747.50 747.18 63 30 inch 0.0050 0.0050 YI 68 YI 8B 733.68. 733.29 77 24 inch 0.0051 YI~105 MH~l106A 745.23 744.60 125 18 Inch 0.0050 TI 740.08 738.,08 40 8 Inch 0.0500 ~ • • • • ' ' ' ' J
~ \ _ ~ - 1 I ~ ~ 1 / '::<.~',_(r:,' YI~31 CI~32 749.00 748.45 54 18 inch 0.0102 0.0102 YI~167 YI/66B 736.00 735.60 69 15 inch 0.0058 30 inch 0.0050 T) MH 740.08 737,28 40 8 Inch 0.0705 MH OBA EX YI 086 744.80 744.45 0
r-~ ~ ~ i I ( 1 I-r / ! l l >;;;r~t;`; CI~32 MH~33 748.25 748.18 46 24 inch 0.0015 I ~ f ! 0.0015 YI~688 q/69 733.29 732.57 144 24 Inch 0.0050 YI~107 YI~108 747.96 747.37 t8 15 inch 0.0050 T1~3 YI~41 740.08 738.83 40 8 Inch 0.0813
~ ~ ~ '""'""'-'~'C""""'°~ ~ i t ~ ! ! I ` MH 3 YI 5 746.98 744.50 114 30 iq~ 0.0218 0.0218 CI 9 CI 4 732.37 731.11 74 24 inch 0.0170 YI 08 Eq 09 747.14 745.81 65 15 inch 0.0050 ¶ MH 5A 740.08 738.80 40 8 inch 0.0320 Turnbull Sigmon Design ~ ~
\ f \ / ! ` ~ ) ' P ~ P - ~ r :.:'rt:if iiis;.'S YI~34 YI~35 747.00 745.75 42 15 I ' h 0.0298 - / / ~ inch 0.0200 root Morehead Square Dr. 0.0298 YI~70 YI~71 752.66 747.70 157 15 inch 0.0316 YI#110 MH~111 735.00 729.70 45 15 inch 0.1178 n TC0~6 740.08 739.42 33 8 Suite 530
\ ~ ~ I CI 6 744.00 743.80 41 36 i ch 0.0050 1 inch 0.0460 15 Inch 0.0300 ,42 738.20 51 8 inch 0.0239 ~ C6~rlotte, NC 282og 0.0050 YI~l71 MH~72 747.50 746.35 25 5 MH~111 YI/112 729.50 727.70 60 YI 7 739 Phoae: o . Z .6 00
\ ~ ~ - / ~ 1 r ~ ~ 11 I CI,~36 MH~37 743.10 738.25 242 42 i ch 0.0200 i ~ _ 1 / ~ I 1 ~ 0.0200 MH 2 MH 3 737.89 737.70 37 15 inch 0.0051 727.00 100 15 inch 0.0050 TI MH 6A 740.08 735.19 35 8 inch 0.1397 7 4 5 9 5 X17 ~7 YI~112 FES~113 727.50 110 ~ Fu; go4.522.0882
~ ~ i ~ i I ~ / / / MH 7 YI#49 731.14 730.65 97 54 1 ch 0.0051 r - 1 i / \ ~ _ r , y • Y Y Y ~ 1 1 \ ~ ~ / / / / t 1 7 736.x5 1as 15 i on 0.0050 0.0051 MH~73 YI~74 737.50 735.00 149 15 inch 0.0168 YI 14 MH 15 723.50 718.50 44 15 Inch 0.1136 TI YI 3 740.08 735.85 40 8 Inch 0.1058
7 r I \ 1 / / 1 t 1 ~ ``.'s:`'>i,`; 11#38 YI~39 73 .50 0.0050 YI/74 q~9 734.80 731.65 59 15 inch 0.0534 MH 15 FE 16 713.95 713.80 29 15 inch 0.0052 119 MHIp62A 740.08 736.46 36 8 inch 0.1006 LAND DEVELOPMENT DESIGN SERVICES
~ 1 1 w / v ~ 1 i 1 1
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1 f a \ \ k~ } I ~ 1 \ \ t j I 1
i ~ i \ 1 ~ ~ \ 1 \ . / 1 I O Y Y• Y Y Y w ~ / P i - / E J / r -r \ FROM TO INVERT IN NVERT OU LENGTH SIZE SLOPE / ^ ~ ` / / ~ _ RD/1 RD~'t 783,00 782.28 36 8 tech 0.0200 ~ .
I ' t' ~ - t a \ P:i<~7..`.;~t5:t°:i~:'~.i.,i:..'".~`>; +..:::~:i).`i.~:i'°r.?:ri:7Y<i:'..
C \ \ t ~ , 1 1 { / ~ ~ { / / / ~ .00 78282 19 10lnch 0.0200 / / ~ \ 4, / / ~ / ~ \ J RD/3 RD/4 783 ` ~ , 1 /
V I ~ j I i \ i h `fit. . ~ 1 ~ ~ ; I 1 ! '1 A YY 1 ~ ~ i i / i / / ~ Y1 782.28 780.50 40 81nch 0.0445 / / ~ ! / / ~ ~ RD YI 782.82 780.50 47 10 inch 0.0451
/ I I I i 1 ~ ' { ~ I l i. 1 ~ f l / ~ / \ ~ 1'1/3 763.00 780.10 28 B inch 0.1036
~~•:j`i;~a ~:c!:r~?;':f`?:.,::, `r,~'2~,,~.`°~~r~f,t•'i:.',?." ~'r ~•?'?y' ;i?,'~ ~~'1~•~5`~''~r<:. 1 1 I ~ 'rl , I 1 i i 11 I \ / / ~ RD/8 q/4 783.00 762.58 21 8 inch 0.0200
l 1 1 r r \ r-~ Y vv v / / / i ( •
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`~f t 1 ~ 1 L ~ L ~ Il O 1 fI i ~ 1 / / \ 782.12 781.48 32 10 inch 0.0200
\ \ \ V ~ ~ r / / a 7e1.48 760.42 53 to inch ao20o . ~ / ! ~ 0 P~
~ i1 1 r _ \ t \ Y~ \ { \ J`L~J / / , ! / Ro 0 1 763.00 762.42 29 a 0.0200
~ Y ~ \ \ \ \ ~ \ 1 f / r ! r ~ \ / r"` RDh1 RO/12 78228 781.54 38 10lnch 0.0200 1 i 1 \ ~ \ ~ / r- ~ / ~ Q / ( ~ RD 2 d 781.54 780.42 53 10 Inch 0.0211
\ \ \ \ I ~ 1 \ i \ / / J , \ a,;,, ! ! RD#13 RD~14 763.00 762.os 47 8 Inch o.020o CHARLESTON • CHARLOTTE
~ 1111 I \ \ I\ ~ ~ / / ~ , 1 1 ! ~ /
t . l 1111 ~ ( ~ I Y M Y Y>~Y \ / ~ / ~ ~ I ~ ~M ~ / / RD 4 RD 5 761.73 761.27 23 12 inch 0.0200 • I ~
111 IIV~ ! ~ yV ~ . f \ ! e>r i J ~ a. \ / RD 5 RD 6 761.02 760.08 47 15 inch 0.0200
1111 Ill I \ ~ • , ---f ,J f ~ ~ ~ / 1 \ / RD 6 q 2 760.08 758.20 94 15 inch 0.0200 / LS3P ASSOCIA ESL ~ r ~ \ ~ I ~ RCO 8 763.00 760.13 38 B inch 0.0755
~ ~ ~ ~ ~ / ` \ \ ~ RCO 8 TD 760.13 759.96 34 B inch 0.0050 112 SOUTH TRYON
1 1 1111 1 I 1 / I I I 1~1 11 X1.1 ~ w f ~ I _ . \ \ - ~ - / I , ~ 1 ~ ~ OT NC 28284 f `t \ 0 763.00 762.30 35 8 inch .0.0200
~ 1 I ~ _ ~ ~ ~ r \ ~ f +,.i ~ \ ` RD/19 RO/'1 1$, 704333.6686 FAX [phone] ` ~ ~ ~ s 4 ~ \ _ " - RD/20 RD~'11 76214 761.46 34 10 inch 0.0200
r ti ` I 11 1 111 I 1 I ! 1 Y M,: ~ r ° ~ . \ \ y' \ _ \ HTIPJ/WWW.LS3P. \ \ j RD 21 RD/22 761.29 760.35 47 12 inch 0.0200 trip
I i 1 111 1 - _ - ~ a ~ / ~ 11 ~ 1-•.) \ \ \ ~ \ 11 / \ \ - _ ~ RD 23 760.10. 759.22 44 15 inch 0.0200 ````~~t ^A rr''4ii
~ 1 111 I11 ! 1 . \ ~ ~ ~ , i I ~ _ c ~ r 759.22 757.00 82 15 inch 0.0271 iii
~ ~ ~ ,1~ _ 1 \ ` \ \ ~ ~ ~ , RD/23 MH~15 ~ ESS~ ~ ~ ~ ~ / ~ \ ~ 24 RCO 25 763.00 747.50 24 8 Inch 0.8458 ~ ~ p \ ~ ~ RDA ~ r
/ , ! I 1 \ 1 r V ^1 v , ti I / 1 1 \ w 1 ~ \ \ \ \ ~ f ~l / / 1 1 7 ~ / RC0~25 RC0~26 747.50 746.77 36 8 inch 0.0203 ;
~ ~ ~ \ \ / \ / _ - - ' \ RC0~26 MH~76 746.61 745J3 44 10 inch 0.0200 °
~/X1111 \ ~ ivy ,1' I! ~ , ! J ~ / 1 1 l 1\~ A~ / gill Ili~~ i f ~ ~ vv ~ ~ b' l I t / \ ! 4 , ~ RD 27 RD 28 749.00 748.52 24 8 inch 0.0200 •~t~ Q~.•
\ \ ~ \ \ \ I I ~ ! ~ RD 29 748.52 748.04 24 8 Inch 0.0200 ~.,'9 •...~N,..•• ~
/ /J \ I { / ! RD 29 MH 6 748.04 745.89 17 8 loch 0.1265 q, ~A
\ ~ ~ \ \ 1 \ \ ,5,,, 1 I / ~ ~ ~ ~ \ 1 ! \ I I ~ ( ~'rrmuwtnttttt 07/15/04 1 I ! ~ ~ I RD RD 1 749.00 748.28 36 B Inch 0.0200
\ r M ~ ~ / l l l 11 J~;: \ 1, 1. / r / , ~ /1 / ~ RD/31 MH/77 748.28 747.50 18 8 loch 0.0433 `~~~t ~i,,
\ \ \ ~ I f / / / i( / ~ ~ i 1 I i{ / I i 1 ,o CAIZ \ 748. 22 B inch 0.0200 ~i, ~ ! \ RD 2 RD 3 749.00 56
~ \ \ \ \ ~ - 1 / ~ / / ; j I, ~ • l ! l ~ ~ I ~ v Ro 4 74e.5s 748.08 24 6 ~cn 0.0200 ~
J l 1 j ! / V A\ RD/33 ~3 ~t, • / r l ~ ~ f ~ l ( ~ \ \ ~ ! / / , ; / / \ V A RD~34 MH~77 748.08 747.50 17 8 inch 0.0341 /
It ! ~ I ! I AA\ e ? S ~ I 1 / ! / i v RD MH 9 749.00 744.53 33 8 inch 0.1355 = 223 • z
i ! 1 J l / if/ '~(7 U p~ ~ \ \ \ \ RD RCO 7 749.00 748.83 17 8 Inch 0.0100 ; ~
1~, v .~~\VA vi 1 _ ~ ~,1 1! 1 f t v ~ v vv ~ i ~ % ~ / 1 ~ v y . v V\ \ v I ~ - ~ I / ~ _ _ _ - _ _ ~ ! I l it ~ 1 1.I t!~ o \ 0.0100 •ti r' ~ ! / f 1 / li Ilfl / ~ ~ \ \ \ \ RC 7 RD 748.83 748.34 49 8 inch 6 Q
i ! i / I ! lI 11 ! i l ;.I \ \ \ \ ~ r.tifl ! ! / ~ : ! l ! 11 l l / llJ ) \ \ RD/38 RD/39 748.34 748.22 12 8 inch 0.0100 iii ~/S I G1~0 0`
t i I ~ 1l 11 l ~ ~ / I -o \ \ \ \ \ \ t~~~~ ! J J ~ ! ~ ! !J !l l Ill \ \ nrmm~untt~ ~ ~ / / ~ I C \ \ \ ~ RD/39 RD/40 748.06 747.70 36 10 inch 0.0100
~ I ~ \ ! ,G / ! ! / ////J/ ~ ~ \ \ \ ,G ! ~ ! ! l / / I ti 1 \ \ RD~40 RD/41 747.70 747.34 36 10 Inch 0.0100 `~ttttuu101rrnrgi
~ ! ! 111 / / ~ ~ i \ 747.17 747.05 12 121nch 0.0100 ARQ / llll~ill// ,
I I lI ~ , ~ ( , l /J J! / ~ i I \ RD~!42 RD/43 747.05 746.89 36 12 inch 0.0100 ~ 0 , l 11 l y s
\ / ! a I I i r! zi y \ ~ ~ I J l11//l/ / \ ~ I RD/443 RD~44 746.44 746.08 36 15 inch 0.0100 ~ s
\ , '~l l lllJlll l/ _ ! RD RD 746.08 745.96 12 15 inch 0.0100 ? : -157 ~ '
- \ / , / / / / J!/ / / I ~ / { RD 5 MH 9 745.96 743.95 86 15 inch 0.0234 • r
w / / = ! ! I ! f l ~ / / / RD AYI~139 749.00 748.41 59 8 inch 0.0100 .
\ \ I 1 \ • L \ . ~ / / / / I ~ ~ ` i , ~ , ~ / RD~47 RD~49 749.00 748.79 21 8 inch 0.0100 his ~
~ z \ ` ~ r 1 ! ~ Inch 0.0117 ~iq ~4AN `p~ RD~48 RD~49 749.00 748.79 18 B rprup~rrrptttt~t~
RD,~49 RD~50 748.63 748.39 24 10 inch 0.0100 MEMO OF ALAN IVSTITUTE OF ARCHTECTS
~ ~ \ ~ ~ ~1 ! ate 1 i 1, ~ 1 t ~ , / , RD~50 RD~51 748.22 747.98 24 121nch 0.0
\ \.q~1 I~ 1 \ \ ~ 6 COPYRI(21T 2003 ALL RIGHTS RESERVED RD 1 AYI 35 747.98 746.56 21 121nch 0.067
t \ \ 1 1 I ~ 41 ~ 5\ ~ \ ~ f f rl ~ G I / ~ Ji{?mlil0l YLlOIi OEIel1 x@41 DETAIL 1. ON-SITE BURIAL PITS REQUIRE A PERMIT. PRINTED OR ELECTRONC DRAYdIVCS AND RD 2 RCO 4 749.00 748.62 17 B inch O.D224
1 ~ 1 ~~1\ ti~ \ o I f ~ / 2. ANY GRADING DONE BEYOND THE DENUDED OMITS INDICATED ON THE RD 3 RCO 4 749.00 748.62 19 8 inch 0.0200 DOCUMBVTATION MAY NOT BE R~RODIKT~
J I i ~ 1 I / ! i I 1 1 ' I i l 1 \ ; : ~ / / ~ f I r t / / ~ 1 PROPOSED CONTOUR RC0~54 AYI#136 748.62 746.49 14 B inch 0.1521 PROPOSED SIDEWALK CONSTRUCTION DOCUMENTS IS A VIOLATION AND IS SUBJECT TO A N ANY FORM VViiHOUT WRITT6V P6thNSSION
/ I I it 1 . ~ ~ `".:r' 1 I1 { r / / / / f 1 I 1 111 ~ . I ,1 ~ / ~ ! / , 1 / FlNE. RD 5 RD 6 749.00 748.76 24 8 inch 0.0100 FROM LS3P ASSOCIATES LTD.
~ ~ i / 1i I ~ ~ ~ ~ / , r / I i 3. GRADING MORE THAN ONE ACRE WITHOUT AN APPROVED EROSION RD 6 RD/57 746.76 748.54 22 8 inch 0.0100
i. I r- ~ / / . ~ - / / lil 1 ~ , ~ ? /11 / ~ l,~ / / 1R. - CONTROL PLAN IS A VIOLAl10N AND IS SUBJECT TO A FlNE. RD 7 AYI 134 748.54 748.45 9 B inch 0.0100 PROPOSED RIP RAP APRON CMLDS X20.23 ~ ~
~ ~ i - / / I ~ ; ~ d ; ' ' / I r J J / r ~ i ~ PROPOSED INDEX CONTOUR . ~ f - , , / 1, , 1 a f I 1 ~ / 1 / / J 4. ALL FlNAL CURB AND STREET GRADES AT INTERSECTIONS SHALL BE RD 8 RD~60A 763.00 762.06 47 8 inch 0.0200
COORDINATED WITH INSPECTOR. RD 9 RD OA 763.00 762.06 20 8 inch 0.0470 ~ /5 ~'6
PROPOSED TREE CMLDS /40.02 5. SIGHT TRIANGLES INDICATED ARE THE MINIMUM REQUIRED. RD~60A FES~608 762.06 75200 53 8 inch 0.1898
r ~ % ~ I ~ I ~ ~_--~7Y' \ 1 \ f 1 / / z 1' EXISTING CONTOUR ~1/... / ~ ~ III f 1... \ / / / / '1 XX-XX pROTEC110N FENCING RD~81 RD~82 757.83 757.35 24 8 inch 0.0200 6. APPROVAL OF CONSTRUCTION DOCUMENTS IS NOT AN AUTHORIZAl10N
TO GRADE ADJACENT PROPERTIES. WHEN FlELD CONDITIONS WARRANT RD 2 RCO 3 757.35 756.95 20 8 inch 0.0200
OFF-SITE GRADING, PERMISSION SHALL BE OBTAINED BY CONTRACTOR RC0~63 MH~16 756.95 754.69 103 B inch 0.0200
/ / \ ~ ~ ` , ~ 0~ EXISTING INDEX CONTOUR / _ _ EXISiiNG FEMA 100 YEAR FROM THE AFFECTED PROPERTY OWNERS. 4 RD 5 754.33 754.20 20 B inch 0.0069 / FLOOD ELEVAl10N RD/6 /6
i /i , ~n / / ~ / ~ 1 7 1.1 /1Cfl~C TA [AICIIDC CDADCD AD6IAIA/![ PNJTDAPTIID CIJAII enrec VIIIM 7CAM 7R9CQ 1Q Q fnw6 nn790
1 1 111 VnVGIR IV GI\JVI\L rl\Vr LI\ VI\nll\nVL, VVI\11\nVlVl\ N11n r%ufuu 11#LI /VT.VV /VL.VV IV MAINTAIN A MINIMUM OF 0.5R SLOPE ON THE CURB.
- ` ~ \ ~ t / / / / / 1 `may RD#66 RCO 7 754.50 754.42 4 81nch 0.0200
-PROPOSED _ w EXISTING STORM 8. SUBSURFACE DRAINAGE FACILITIES MAY BE REQUIRED IN THE STREET RCO#67 YI#23 754.42 753.30 28 8 inch 0.0400 RIGHT OF WAY IF DEEMED NECESSARY BY THE INSPECTOR. RD #68 RD #69 739.50 739.00 25 8 inch 0.0200
\ \ = - - . - . \ 1 \ r \ / ? I t l ( DRAINAGE SWALE
9. THE CONTRACTOR SHALL MAINTAIN EACH STREAM, CREEK OR RD#69 CI#50 739.00 736.67 60 8 inch 0.0388
~ \ { PROPOSED r- \ \ \ \ \ { { / / J J r ; l BACKWASH CHANNEL IN AN UNOBSTRUCTED CONDITION AND SHALL RD#70 RD#71 741.50 741.10 20 B Inch 0.0200
\ ~ \ \ ~ 1 { \ ` / / , : STORM DRAINAGE CMLDS #20.25 CMLDS #20.25 REMOVE FROM THESE AREAS ALL DEBRIS, LOGS, TIMBER, TRASH, JUNK 40,80 25 B inch 0.0200 AND OTHER ACCUMULATIONS. RD#71 RCO#72 741.10 7
\ \ ~ r. 111 \ \ ,--~J RCO#72 YI#68B 740.60 737.83 52 8 inch 0.0532 10. ANY CONSTRUCTION OR USE WITHIN THE AREAS DELINEATED AS
PROPOSED ROOF DRAIN TREE PROTECTION NOTES: FLOODWAY DISTRICT FRINGE BOUNDARY LINE OR FLOODWAY DISTRICT RD#73 MH#72 747.50 746.93 24 8 inch 0.0238
LINE WITH CLEAN OUT ENCROACHMENT BOUNDARY LINE IS SUBJECT TO THE RESTRICTIONS RD#74 RD#75 755.00 754.60 20 8 Inch 0fO. 0200
1. NO SOIL DISTURBANCE OR COMPACTION, CONSTRUCTION MATERIALS, IMPOSED BY THE FLOODWAY REGULATIONS. RD#75 RCO#76 754.60 754.20 20 8 inch 0 200 TRAFFIC, BURIAL PITS, TRENCHING OR OTHER LAND DISTURBING 11. THE LOCAL ENGINEERING DEPARTMENT HAS NOT REVIEW AND DOES NOT
e R 11 yl 1 11(r, \ / f / r CMLDS #20.01A,E ULDS #20.01A,B ACTIVITY WILL BE ALLOWED IN THE TREE PROTECTION ZONE. TREE ASSUME RESPONSIBILITY FOR THE STRUCTURAL STABILITY OF ANY
a9 I _ Z3M CI PROPOSED CURB INLET CMLDS .02A.1 R' / 1 1 1 1 1 II { \ / t~ G `a\ CMLDS #20.02C ;MLDS #20.02A,B BARRICADES MUST BE INSTALLED BEFORE ANY DEMOLITION, GRADING EXISTING OR PROPOSED RETAINING WALLS ON TI'.E SITE. ,MLDS #20.020 PRO]ECT: 03055 OR CONSTRUCTION BEGINS, AND NOT REMOVED UNTIL FINAL TRENCH DRAINAGE SYSTEM
CMLDS #20.12
• -Yy`~- ~ t „ 1 ~ ~I `\l \ - \ \ rP=.. \ \ ` , 1. , ,MLDS #20.12 INSPECTION. 12. NON-STANDARD ITEMS (I.E.: PAVERS, IRRIGATION SYSTEMS, ETC.) IN DATE 10-19-2004 THE RIGHT OF WAY REQUIRE A LOCAL OR STATE ENCROACHMENT FROM TO INVERT IN INVERT OUT LENGTH SIZE SLOPE
1 ~y\. \ PROPOSED DOUBLE CMLDS 20.03 I \ 1 \ \ \ . _ DCI \ I l I ( / \ \ \ ,w. CURB INLET CMLDS #20.12 CMLDS #20.03 2• TREE PROTECTION BARRICADES MUST MEET OR EXCEED TREE AGREEMENT PRIOR TO INSTALLATION. TD#1 MH#15 759.80 757.42 50 10 inch 0.0476 DRAWN BY: IM
0 1 \ CMLDS 20.12 ORDINANCE STANDARDS (IN CITY OF CHARLOTTE TREE ORDINANCE GUIDELINES, APPENDIX 9) OR LAND DEVELOPMENT STANDARDS MANUAL " TD#2 MH#54 732.50 731.86 32 8 inch 0.0200 CHUM BY: BCS ;MIDS #20.04A,8 4004 13. ALL STD NUMBERS REFER TO THE CHARLOTTE-MECKLENBURG LAND
111 ` I , \ \ \ % 1 \ CMLDS N20.04A,E 1 \ ! I I k- V zs~ D1L DEVELOPMENT STANDARDS MANUAL. TD MH#78 744.06 743.07 99 18 inch 0.0100
\ t, I it \ CMLDS {20.09 Rd \ \ \ II f 1 \ \ t - y i I MH PROPOSED MANHOLE CMLDS #20.10 CMLDS #20.09 3. BEFORE GRADING/CLEARING/CONSTRUCTION BEGINS, CALL FOR ALL SIDEWALKS STOOPS TERRACES AND OTHER PAVED AREAS SHALL
1 1 If\ \ _ / / CMLDS 20.12 CMLDS #20.10 INSPECTION OF TREE PROTECTION BARRICADES BY URBAN FORESTER. 14. ' CMLDS #20.12 SLOPE AWAY FROM BUILDING(S) AT A MINIMUM OF 2X CULVERT STORM SYSTEM
{ III 11 1 ~ \ \ - , 4. NO GRUBBING WITHIN TREE PROTECTION ZONE. LEAVE SOIL AND LEAF
\lilt lll Ill 11Y 1 \ \ \ \ \ \ / \ 1 OSED FLARED LITTER UNDISTURBED. SUPPLEMENT WITH 1-2 INCHES OF MULCH. 15. CONTRACTOR SHALL CONTACT INSPECTOR 48 HOURS BEFORE CONSTRUCTION. FROM TO INVERT IN INVERT OUT LENGTH SIZE SLOPE
1 1 1 11 1 \ \ \ r / / PROP CMLDS 20.23 0 1 1 FES END SECTION 11 g 1,1 \ , + \ \ //i CMLDS #20.23 RE-SEED WITH GRASS ONLY IN DISTURBED/GRADED AREAS. CRADINC PLAN
s. e \ 1 1 \ t 1 \ . 1 \ e„ 1 1 , l 111. r D \ 11 \ \1 5. BRUSH, VINES AND SMALL TREES (c8 IN. DIAMETER, OR AS SMALL AS HW#125 HW#126 712.50 712.30 45 (2) 72" CMP 0.0044
\ 1 \ 1 1 11 ti 111 1 t \ r \ \ / I/ l l I 11 ' CMLDS #20.17A 2 IN. CALIPER) MAY BE HAND-CLEARED ONLY CUT FLUSH WITH CMLDS #20.17A GROUND SURFACE. EXISTING TREES MAY BE LIMBED UP 6 FEET (AT NOTES
" 1 1 1 tll. 11 \ \ = / r 1 l~ "K3<H PROPOSED HEADWALL 1 1 1 111 1 1 \ r\ \ \ -"~/r i l l 11 1 CMLDS #20.178 CMLDS #20.178 LEAST 2/3 OF THE BRANCHES SHOULD BE LEFT) TO IMPROVE STORM DRAINAGE SYSTEM
1 ' \ 1 1 1 \ 1, X11 1 \ \ ~ \ ~ I l~/'lll VISIBILITY. 1. ALL STORM DRAINAGE TO BE CLASS III RCP UNLESS NOTED OTHERWISE.
a 1 1 \ 1 1` \ 1 \ i \ 111 11 1 \ \ l Ili li/~ 2. HDPE STORM DRAINAGE PIPE, SEE DETAIL #1/C0204
` l 1 1 1 1 •1. 111 1 ; , - ~ \ v v / / 1 / /II rrl,,,f f 1 1 111 111 \ } \ \ / / / / / I f/rl PROPOSED YARD CMLDS d20.13 W3M Y1 CMLDS 0.13 6. EXPOSED TREE ROOTS MUST BE CLEANLY CUT WITH A SHARP PRUNING TOOL; BACKFILL AS SOON AS POSSIBLE TO MINIMIZE EXPOSURE TO THE 3. PVC ROOF DRAINAGE
I ( 111 + 111 \ r A \ / r l l/ l , lIl/,; DROP INLET CMLDS #20.14 CMLDS #20.14 AIR 4. Cl = CURB INLET (TYPICAL), SEE CMLDS DETAILS 20.01A, 20.018
Polk $ l 4 (I ; i. t 1 1 11 ~,A N / X ) I I !!+Ijl~ 7. TREE BARRICADES MUST BE INSTALLED BEFORE ANY SEE CMLDS DETAILS 20.02A, 20.028
M:mm e A o + I I 1 1 v v,v v ,v 1 1 r / l/ 111 H a .o~ i I'll vvv~ v~ vv 1 \ 'ts ~ / ~ JIfI /l1 _ a a 8 i 1 i \\A\ ~A \ i I/ ~/I PROPOSED SLAB AND NOT REMOVED 5. MH = MANHOLE (TYPICAL), SEE CMLDS DETAIL 20.09 DEMOLITION/CLEARING/GRADING CONSTRUCTION,
a / lr 1 1 \ VA\ V~VAA V ` `n~i / I I tea, STl o + 1 \ - vv v vvv ,A . ti`s \ ~ / 1, ~ TOP INLET ! v \ 1 r UNTIL AFTER FINAL INSPECTION BY URBAN FORESTER. 6. YI = YARD INLET (TYPICAL), SEE CMLDS DETAIL 20.13 7. HW = WINGWALL WITH SPLASH PAD, SEE CMLDS DETAIL 20.17
8. PLEASE SUBMIT U71UTY PLANS SO THAT THEY CAN BE REVIEWED FOR 8. TI = TRACK INLET CATCH BASIN 501
UTILITY CONFLICTS WITH EXISTING AND PROPOSED TREES: ELECTRICAL, TCO =TRACK DRAINAGE SYSTEM CLEAN OUT TELEPHONE, GAS, SEWER, WATER, AND SITE LIGHTING. 9
+ t 1\ PROPOSED VICINITY MAP / \ N\ \ \II ` \\\1 1 1 rt \ / / / / f I i RETAINING WALL 10
NTS \ \ \ 11i\ ~ 9. RCO =ROOF DRAINAGE SYSTEM CLEAN OUT 9. TREE. PROTECTION FENCE IS TO BE LOCATED PER PLAN OR AT A 11. NEENAH MODEL R-4996-A3 TYPE M TRENCH DRAIN WITH GRATED COVER IN THE SETBACK OR RIGHT-OF-WAY. OR EQUIVALENT. MINIMUM OF 1 FOOT PER TREE E DIAMETER INCH AWAY FROM THE TREE
INA* 1,\!\ , \\\1 \1 I i /
I \ I l 1 1111 t t \ \ / i / / - - - PROPOSED IRRIGATION SLEEVES 1 11 11 111 II (1 \ / i (2) 4 DIA. SCHEDULE 40 PVC SOLUTIONS TFROUCH LISTENW-
r f 0 50 100 200 300 400 1 I ~1 ! I } , s ! I , _ ! I/•, ~ li I 1 I 1 I I / y I 1 '1 511 11\\ ~ I
11 ,1,i~ , I I r 1. ,
1 2 3 5 6 r 4 CONSTRUCTION

s ~ ; ~i1`~ i \ ~ \ A ~ ~ ,r. ~ NOTE:
r ~ 1. CONTRACTOR TO ENSURE THAT OUTLET BOX IS 5 . ( ; \ SURFACE OF BASE FOOLING TO PROVIDE UNIFORE iUTLET BOX IS SET LEVEL AND FLUSH WITH PROVIDE UNIFORM BEARING PRIOR TO PLACING
~ \ ~ i j ' \ ~ \ , ~ SECOND BATCH OF CONCRETE. GROUT IF NECES 3ROUT IF NECESSARY. ALL ORIFlCE AND PIPE
~ \ i - ~ ~ ~ ~ _ ` OPENINGS INTO" THE OUTLET STRUCTURE SHALL E JCTURE SHALL BE SEALED LEAK TIGHT, TOP OF DAM ELEV: 631.00
~ \ USE LINKSEAL MECHANICAL SEALS FOR ALL PIE 1 1 ~ ~1, f : ~ ,r , ~ ILS FOR ALL PIPES 24" AND SMALLER. _ _ _ _ FOR EROSION CONTROL MEASURES ASSOCIATED -
I / , \ ~ 2. REFER TO DETAIL ~7 THIS SHEET FOR EROSION f ~ ~ ~ ~ ~ j ~ WITH THE OUTLET STRUCTURE DEVICE. VICE. - -
l I S i ~ r,• r ~ \ \ 't - - - - -
~ •;N \ t \ \
1 v ` : , , 0~ v
,6 \ ~ 1
'I; \ ° ~ GRATED COVER 1 ~ i f .i, \ ~ - \ SEE DETAIL ~2 ALUMINUM STEPS - - - TOP OF STRUCTURE ELEV: 728.86 12" O.C, TYPICAL - - - - - - - - - - -
ro ~ ~ ~
c.. O -
rr % - PERMANENT POOL ELEVATION • 0 - - - - O
1 ~ ~ % - _ - 1 ~ / ; ~ / ; y :~,c ELEV: 726.00 _ - - _ - _ - ~ ~ °
TRASH RACK 4.25 DIAMETER D - - - - _ - - - -
' ~ ~ ~ / r' ~ / % RAMP RAMP RAMP CL ELEV: 724.50 e~ WALL SLEEVE - - - - - - - - '
1 n "rs ~ ~ ~ A /l i' / ' / / / J ,l / ' f f / ~ r i' i'' r' i j ' ^z?•.i ~ / / / ! r'~ f ~l l i ` l ~ ' ALUMINUM STEPS TURNING ROD GUIDERAIL o : _ _ - - - - - - - •
~ ~ \ i ill' I / r,/ it / j ~ ~ % ,1 / i j ,/i, l/ ~jr j i, / / i~r rl ~,r ,'l i J / ~ ~2" O.C., TYPICAL ..t. .,!~~i~' r, j~ ! it ! !/l'r/ / r~ 1, is f r;/~ i % /i ,r. / r/l~%" % 'ii'i :;i ~••r SUPPORTS AS NECESSARY - - - - - -
6" DIAM. GATE VALVE : - _ - _ - • _ _ _ ~ ~
~ \ F / ~ i i ~ l' i / i j•!l / f / f i/ i • i` / ' i ' i i ~ / jl! ` / j PRECAST 7 X 7 VAULT • x;,'~c' % ; i j / / r f'~ ' f . j ! ,r% i i l i" DIMENSIONS ARE TO OUTSIDE 3j, 5,~, i ~ j' f' r r` f~; ~i J `r i i', r i ~i / l: r. ,1/ i TO DRAIN POND, TURNING ° - _ - - _ - - - - • ROD TO BE EXTENDED TO o - - - - - - •
..4.`~' ~ ~ \ ; / l i i ~ ~ f~•-• -T -7 i` ~ ~ , ~ r , / i CONTRACTOR TO SUBMIT < y'r, ~ i ' ~ , i` i , f r'' , ~ / ' / % % i` SEALED SHOP DRAWINGS ,o \ TOP OF STRUCTURE WITH - - - - - - '
~ ; .q ,ti FOR APPROVAL PRIOR 0 OPERATION ° - - _ - - - - - - Charlotte-Mecklenburg Schools • HANDWHEEL F R _ - -
, • ~r,~;. ,,3y;~ TO CONSTRUCTION B ` ~ 6" DIP POND DRAIN - • 4' o ~ I ~ -
\ .f•, °<.F~• r~:;~,. f SOLID FIL w ;1, V. U~. p ~ GROUT/CONCRETE WITH TRASH RACK i I " - - - - - - - - • ) ~ I,..:I 54 RCP OUTLET PIPE I I
I :r• BOTTOM OF POND - I',I Q 1.00 SLOPE I I • .,I I
~ ~ ~ ~ ELEV. 720.00 _ _ NV. 719.80~:;~• - - - - - - - - - - I I • •Ai ~ I I J
,a.~,,, ~ • 1 :1RAMP 12:1 AMP + - -
~~r:~ , r", EE ETAIL X15 i _
t~~%.y, > D~61'IIONA IN~'0 o 8 REI a - - T - - - - ~ • . 4-. . - - ~ L - - - - Turnbull Sigmon Design
'.A', ~ ~;~'~~:,./r:~,r BARS Q t x \ x ~ - a .d - - rehead S uare Dr.
\ ` / ~,f~ r? 'FOREBAY... •,~M,r, , rr, ~r. X - _ °d ' • . i. • . r • - • • : ~ 0 - - - - - - - ~ ' Suite 530 -li,. ~~~-ICI- - _ - I ( -I - - - Charlotte, NC 28203
_ - I - - - - - - - L.. - - i j = - Phone: go4.529.6500
~ 1; . CLF,AN`OUT~'ST,AKE . • X - - ~`%~s , ~ : ~ \ ._i i ~-iii -1 - - - - - - -I ~ ~ ~ i ~ ~ AN H R D A - I- - - ( Faa: o , zz.o88z I - ~ I- 7 4 5 - - - - I - CU -OFF TRENCH - I -
\ . ~ S~5 -III I \ ~ ~ r,,,, a ~ . • `~LF*V; '723:00 ~ w _ I - I - ~ ~-I ~ I =:III--) ~ I-° (EXCHANGE AND BACKFlLL / - - I I - - W COMPACTED SOIL)
F?/;~%~.,~. :'6.: DIAMETER~:.FOREBAY LAND DEVELOPMENT DESIGN SERVICES
\ t r<~,. ~'DEWATERING ARAIN ~ : ~ • ' ~ - ~ X
\ \ W v . ~ ~:VNV IN: 721.00,:' . , . ~ \ \ . ; , ~ ~ •a V,OUr7 5 \ \ O ..n fq' N, 4 ' ; r` . ~1
`x,~'
\ O '~'_.x~` rte; Yky rY'~Y~' / \ \ K4J~Y 7 ~ . 1f2~' \ ~
v NOTES. / ENERAL TIN RMA IN INF B~IS aU WATER ON STR N U N 0 BAST TER Q WA
BASIN 1 FOR CMS DOCUMENTATION T NS. BASIN:
• , . , S BUILT DRAWINGS TO BE PROVIDED TO TURNS - • PURPOSES PRIOR TO RELEASE OF CONTRACTOR L SIGMON DESIGN IFI~'e 110 RNBUL CA D TO TU PEC TIDE S BASIN BOTTOM ELEVATION: 720 MSL F CONTRACTOR RETANNAGE.
\ ` ~ o'~l> X ~ i ` • • ~ • , ~'''f~~'' ~ . \ NANCE TO BE AS INDICATED IN THE A. EARTHWORK LEVATION: 726 MSL PERMANENT POOL E
~ x • ~utn ~ 2 POND MAINTE r„• " ~ • r''N:~ \ \ PRACTICES DESIGN GUIDELINES. VDICATED IN THE NCDENR STORMWATER BEST MANAGEMENT OF TREES LOGS STUMPS, ROOTS, ELEVATION: 728.86 MSL 1. THE FOUNDATION AREA SHALL BE CLEARED TEMPORARY POOL BOULDERS SOD AND UNSUITABLE SOIL. IF NEEDED TO ESTABLISH VEGETATION, THE 22,264 SF
\ \ =~''ti~: .'•20,Ff.,FbRE~AY~' ~ ;~~r' \ \ ` DRAWING \ , , • X \ ~ 3. CONTRACTOR TO SUBMIT SEALED SHOP PERMANENT POOL SURFACE AREA: ALl SOIL SHALL BE STOCKPILED AND SPREAD ON THE COMPLETED DAM AND SPILLWAYS. ' SHOP DRAWINGS OF OUTLET STRUCTURE DEVICE AND TOP .DRAINAGE AREA: 46.05 AC ;
\ p..,;=; • tc~; ; . \ APPURTENANCES FOR APPROVAL PRIOR TO CON, THE FOUNDATION AREA SHALL BE THOROUGHLY SCARIFIED BEFORE PLACEMENT OF PRIOR TO CONSTRUCTION.
IMPERVIOUS AREA: 19.34 AC 42 THE FILL MATERIAL. PERMANENT POOL VOLUME: 1.69 AC-FT
HE U PLANT S 2. EXISTING STREAM CHANNELS IN THE FOUNDATION AREA SHALL BE SLOPED NO STEEPER
~ ~ BASIN • ~ ~ ATER a .W H RIZONTAL TO ONE VERTICAL THEY SHALL BE DEPEENED AND TEMPORARY POOL VOLUME: 1.64 AC THAN A RAT10 OF ONE 0 STONES GRA SAND STUMPS, ROOTS, FOREBAY VOLUME: 0.36 AC-FT 0.21 ` Y`,, WIDENED AS NECESSARY TO REMOVE ALL VEL, ,
~ \ . , tiv ~ ° BASIN BOTANICAL NAME COMMON NAME IMON NAME SIZE SPACING AND OTHER OBJECTIONABLE MATERIAL AND TO ACCOMMODATE COMPACTION EQUIPMENT. SA/DA USED: 1.09
\ •ti ~ PERMANENT i'~OOL'. x fl ~ ~ ' 1 ontederia cordata PICKERELWEED ANDING WATER WHEN FILL IS PLACED CHARLESTON ~ CHARLOTTE KERELWEED 1/3 QT, 2/3 PEAT POT 2.5 O.C. FOUNDATION AREAS SHALL BE KEPT FREE OF ST DIAMETER OF ORIFlCE: 4.25
~YZ A110N OF 726.00 : , / .°ELEV .;;•~i'S• l1ZARDTAIL ~ > \ / 1 saururus cemuus ON THEM. THE BORROW AREAS SHALL BE CLEARED OF STUMPS, ROOTS AND JZARDTAIL 1/3 QT, 2/3 PLUGS 2 O.C. UNSUITABLE SOIL THE WATER QUALITY BASIN SHALL BE CLEARED AND ALL STUMPS
\ ~ ~ ~ ~ ~ X ' ` / / t scl us validus SOFT STEM BULRUSH ITEM BULRUSH 1/3 QT, 2/3 PLUGS 3' O.C, REMOVED,
SSOCIATES LTD. LS3P A
3. BEFORE FILLING OPERATIONS BEGIN, THE SOILS ENGINEER WILL TAKE REPRESENTATIVE DATA N E DESI M DRAT TR S O H TRYON SAMPLES OF EACH PROPOSED FILL MATERIAL AND TEST THEM TO DETERMINE THE 112 SOOT
~ w END • COMPACTION AND CLASSIFICATION CHARACTERISTICS (PROCTOR TEST). ONLY THOSE UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM LENGTH SIZE SLOPE CHARLOTTE, NC 28284 NG. EDAM. STRUCTURE INVERT INVERT (FT) (IN) (Fr/FT~ ND/PLANTI ON TH STRUCTURE
LEG \ R aUAUTY WATE .GE USED AS FlLL MATERIALS AS APPROVED BY THE SOILS ENGINEER WILL BE Tfl. 704,333,6686 FAX [phone] GENERALLY SM OR SC CLASSIFCATION SOILS IMLL BE ACCEPTABLE. COMPACTED
~ 0. P ~ " ~ 1. ` +~/r'~'~, \ \ ~ ~ SYMBOL 1LL~iYJ~l1 I I~.'.\ ~@QL DESCRIPTION SAND CROSS OSI~127 HW~128 719.80 719.37 43 54 0.0100 HT1PJ/WWW.LS3P,COM EARTH FILLS SHALL BE CONSTRUCTED TO THE ELEVATIONS, LINES, GRADE
>::~.r:r SECTIONS INDICATED ON THE PLANS. 1 ALL PIPE TO BE CLASS III RCP, UNLESS NOTED OTHERWISE. ``~pUUUnllupp~ri,, ' % ~ SUBMERGED AND PLANTED O CAR ~~i, • y~ ~ Q ,
~ a';w \ ~ ~ . , ` PLUNGE POOL/ 1 / ~ Nr ,CLEAN OUT•STA O ;:;~r,~ Y ! O.~ / \ ~ APRON/SPILLWAY ~ AY ' LITTORAL SHELF * R STRIPPING OF FOUNDATIONS AND REMOVAL OF WEAK OR UNSUITABLE MATERIALS
° HAS BEEN COMPLETED, AND BEFORE START OF MATERIAL PLACEMENT, COMPACTED ~ ,
ALL STUMP HOLES MINOR EXCAVATIONS AND 5 ~ ' 0 ' EARTH SHALL BE USED TO FlLL ~ 0.5 FT. g,0 FT, 0 j`~%~~f: MAINTENANCE ACCESS DEPRESSIONS FOR CAVITIES INSIDE THE EARTH FILL LIMITS.
' L y L•; / \ ~ t WATER ELEVATION / " ION DRIVE . . , • ~ - 51 -
~ \ f ~ r~ ' ALL BE PLACED IN HORIZONTAL LAYERS OF NOT MORE THAN (9) LOOSE DEPTH. 5. FILL SH Y e
Y ' ~I . ~ ;~r•;~,~;.`,;. ~ . f : SUBMERGED LITTORAL SHELF TO BE PLANTED FEASIBLE AFTER STARTING CONSTRUCTION OF A FlLL. THE CENTRAL F F,~• S SOON AS a : •°•°N Q' F A THAN THE SIDES 2-1 2" EDGE '~.9 '°•~IN~••° ~ i0 BE PLANTED WITH A MIXTURE 0 PORTION THEROF SHALL BE BUILT AND MAINTAINED SLIGHTLY HIGHER /
11 t' ?''sx~~t::~ , , ' ',~;5~; \ PICKERELWEED (pontederia cordato), IJZARD TAIL o), LIZARD TAIL (saururus cernuus), TO ALLOW FREE DRAINAGE TO THE SIDE SLOPES, ~~i,, T, ~P~-
~ ~ ~ ~ C : ' ' ~ • BASIN ,OU • . R. ;~V AND SOFT STEM BULRUSH (ecirpus validus), SEE s validus), SEE PLANTING SCHEDULE ~i~ggmumna~~~~ 07/15/04 .N~, 6, EACH LAYER OF FlLL SHALL BE COMPACTED BY ROWNG WITH COMPACTION EQUIPMENT ~ HINGE S
• ~ ':,:S~E~DETAILS ~1 >,Y~fy 1 1 1 FOR SIZE AND SPACING REOUIRMENTS. ,,,ti. J • -fOR ADDITION ~5~!v,. 1 1 1 O gniuununy WHICH IS BEST SUITED FOR THE TYPES OF SOIL ENCOUNTERED. FILL ADJACENT TO c ```gyp q,~4
PIPE CONDUIT AND ANTISEEP COLLARS SHALL BE COMPACTED BY HAND. EACH LAYER r ~ CARS /i,/ DRY DENSITY ~
OF FILL SHALL BE COMPACTED TO NOT LESS THAN 95X MAXIMUM OR DRYING OF THE ~ STANDARD PROCTOR AT OPTIMUM MOISTURE CONTENT. WETTING ( ) ~ t0 ~
X80 . ~f~'j,, ( i E CONTENT THROUGHOUT s ~s s MATERIAL AND MANIPULATION TO SECURE UNIFORM MOISTUR
it ~ , > : i,; I ~ ~ ~ ' r,r,.y,„~ ~ 1 STS WILL BE PERFORMED AT A ° • EACH LAYER SHALL BE REQUIRED. DENSITY TE :W A MINIMUM TESTS WILL BE = s~-2235 : z FREQUENCY AS SPECIFIED BY THE SOILS ENGINEER. AS ~ ~ ~ ~ ; ~ s, ~ ~ ;
l l 'A' PERFORMED ON EVERY THIRD LIFT OR EVERY 1000 CUBIC YARDS WHICHEVER COMES ~ ~ / / ~ ~ ~ G ~i
,A/-- ~ T WILL BE PERFORMED WHENEVER FlLL MATERIAL HINGE , ~ FIRST. ALSO DENSITY TES ~ \
, ~ t 1 ~ t r r 4~,,. 1 i 1 i =r; CHARACTERISTICS CHANGE. ALUMINUM GRATING AND HATCH 1/8 STEEL \ ~i,~ G(( O~
i \1 I '~4~ .~F. QF cP l ~ / 1 TO BE DESIGNED AND CERTIFlED ~ ANGLE PLATE ~ ~i,,~~ /S I GM ``pp B. OUTLET DEVICE J hrnrrullm~a~~ BY MANUFACTURER. ~
,1 ~ ,r~ x..;, 1 A ' I ````~~pgnlmrprp, A 1, OUTLET DEVICE COMPONENTS ARE TO FABRICATED AS SHOWN ON THE PLANS. CONTRACTOR TO SUBMIT
SHOP DRAWINGS TO ENGINEER " (,A r~,i~~ R FOR 2 GRATE RO ~i, 2. CONTRACTOR TO SUBMIT DESIGNED SHOP DRAWINGS TO THE CIVIL ENGINEE FOR APPROVAL PRIOR TO ~ / ~L ~j
T DEVICE. SHOP DRAWINGS SHOULD " 0 ti APPROVAL PRIOR TO CONSTRUCTION TO THE OUTLE FABRICATION 6 STAINLESS STEEL ' /
\ \ S ~r,, m RATED COVER ALUMINUM STEPS, AND E PRECAST BOX DESIGN, TRACH RACK, G t9 INCLUD ANCHOR BOLT. EPOXY
ALL DRAIN ORIFlCE PIPING REQUIRED. / IN PLACE ~ : _
i 1 ~ t I ~ is 7 ' ~ ~ /ir C. CONCRETE - ° Q S :4
\ \ \ 3 1 ~ 1. ALL CONCRETE SHALL CONFORM TO THE STANDARD SPECIFlCATIONS FOR READY MIXED ••°°e • P~ CONCRETE, ASTM C 94. AN AIR-ENTRAINING ADMIXTURE SHALL BE ADDED. THE '',i ` °•°••e•aea•s•°°
\1 t ~ 1 i PLAT 1 \ Ao L ~ f s ~ of b ~ 1 ~ \ / / \ CONCRETE SHALL BE PROPORTIONED TO MEET THE FOLLOWING REQUIREMENTS:
\ \ ~ q~ 1. 1 . \ r~;T:, ~ 'A' ~~~r~kprr nua~~~~~
1 \ S$ II RI PAP \ q 1 ~ \ / \ COMPRESSIVE STRENGTH: MINIMUM 3600 PSI rlln WATER-CEMENT RATIO: 0.40 - 0.50 7'0 MEMBBZS OF TFE AMEWCAN NSTITUTE OF ARCHTECTS
~ LENGTH. L5 ( ~ 3? ~ ~ \ \ \ _ MINIMUM 3" MAXIMUM 5" , SLUMP. r. „~.x,r.
\ ~ ~.K. is; h ~i Q7 \ ,WIDTH. 9 - 20 T. 0 ~ j / \ ~ _ _ V ~ ~ " V ~ X ~ %i x. . ~ "I'~"`'~'~' AIR CONIENT: MINIMUM 5X, MAXIMUM SX C~YRICFIT 2003 ALL RIGHTS RF~V® • " 18" ALUMINUM
\ . DEPTH: 24 - D NAL ~ Nfi ~ ' ~ \ \ r ~ ~y~r''~'nr~- ~ CONTRACTOR TO PUCE A , Q I/ 1 C \ ~ \ ~ ~ ~_~;~;+~e~~~~'" COARSE AGGREGATE: 1 - 1 1/2 • . ACCESS LADDER PRdYT® OR B.ECTRONIC DRAWNCS AND
~ M IZED STONE ON TOP OF S % ~ \ '1i~~i~s,. . ~ a~, ~i~ ~ `,r~~;i ~.F° " D. GRASSING :.a.:..•• . , 6"' DOCUMBVTATiON MAY NOT BE R~RODUCS3 L.e. ~:~nylk'11 I~, nr y ~ _ 6 GRAVEL T10N PER SPECIFICATION OF EROSION
~l THE APRON, SIMILAR TO PATTERN 1 1 / \ \ INDICATED, TO: FURTHER INCREASE ~ X / \ \ \ \ 18" RIPRAP L GRASS ALL AREAS DISTURBED BY CONSTRUC • y' • " 4-1 2" N ANY FORM WRHOUT WRI'TTHV PERMIS90N FlLTER FABRIC TRASH RACK c , 4-1 2 /
~a ~ SECTION I THE AFFECTS OF ENERGY DISSIPATION / j \ \ \ \ COMPACTED SECTION A-A CONTROL DETAIL SHEET. , z ~ FROM LS3P ASSOCIATES LTD.
~ \ LNG. LEVEL. SPREADER. \ 1 \ ~ \ \ \ • ~ PRIOR TO ENTER ~ 1 ~ _ / 1 j X~ ~ EARTH \ ~ E. PLANTING - - - - - - - -
\ \ ~ 90 LF LE L SPREADER ~ . ~ t. \ \ 1. WETLAND PLANTINGS SHALL BE ADDED AS REQUIRED BY STORMWATER BEST N AVAILABILITY OF PLANTS ~ • 1'
~ j SEf DETAI FOR ADDITIONAL / % ~ ~ / ~ ~ ~ \ A B C I~ OUTLET . s ~ / ~ ~ \ / ` \ \ INFORMATION: - / ~ ~ ~ ~ ~ 1 \ + B C D RIPRAP CLASS MANAGEMENT PRACTICES. PLANTING SHALL BE BASED 0 7.0 FT. 4.25 DIAMETER N TABLE 2.2 OF NCDENR BEST MANAGEMENT PRACTICES DESIGN GUIDELINES. INLET ORIFlCE 63" 54" RCP 54 LISTED I .
~ \ \ ~ \ ~ ~ ~ X / ~ ay \ \ FES~95 10 20 4 r.; . ~ "•a'~ ~ \ ED LIMITS+ TYPICAL... ~ ~ \ 1 ~ 1 ~ + 20 4 14 2
F ~ / \ ~ ~ / / ~ 1 \ FES 5 20 15 14 ~ ~ I ~ ;s / \ ~ ~ 1, , N5 15 14 9 2 - :•i
~ \ ~ i ~ ~ ~ ~ t 1 \ E PLAN. NTENANC D MAI N AN PERATIO 0
~ • 4-•1 Y 4-1/2" A INSPECT MONTHLY OR AFTER EVERY RUNOFF-PRODUCING RAINFALL EVENL 6 DIAMETER •
BASIN DRAIN • ~ 6" WHICHEVER COMES FRST '
~~in-rrn r1l lel ITV DAC"IAI #1 DI AAI _ nr..n..r nrmm~ rnnu Tur TOA@LJ GAPI!
wnI CIS lJur%I J I I D/-%311 V it I r L!-V v o 10 zu 4u au ou I. Rcmuvr- UCdRW rmvm If1G IRH.7" nM%oF%.
2. CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS. IF A PUMP IS USED AS A DRAW DOWN MECHANISM, CHECK FOR PUMP OPERATION.
3. CHECK THE POND SIDE SLOPES, REMOVE TRASH, REPAIR ERODED AREAS BEFORE 6" GATE VALVE
THE NEXT RAINFALL EVENT. W/ WHEEL TURN
4. IF THE POND IS OPERATED WITH A VEGETATED FILTER, CHECK THE FILTER FOR TENDED TO TOP
SEDIMENT ACCUMULATION, EROSION AND PROPER ORIENTATION OF THE FLOW EXTENDED STRUCTURE SPREADER MECHANISM. REPAIR AS NECESSARY.
SOURCE POINT FLOW IN
HARDWARE CLOTH ACROSS ALL OUTLET OPENINGS. REFER TO DETAIL 'A' FOR A N B. QUARTERLY OUTLET STRUCTURE PLAN
ADDITIONAL INFORMATION. CONTRACTOR 90 FT. 1. INSPECT THE COLLECTION SYSTEM (IE: CATCH BASINS, PIPING, GRASSED SWALES) FOR PROPER FUNCTIONING. CLEAR ACCUMULATED TRASH FROM BASIN GRATES,
TO REMOVE HARDWARE CLOTH, RIPRAP TIE WIRE MESH/HARDWARE CLOTH TO R®AR. s is BASIN BOTTOMS AND CHECK PIPING FOR OBSTRUCTIONS. p. i
AND WASHED STONE AFTER SITE HAS ATTACH REBAR TO CONCRETE RISERS USING 12 BEEN STABILIZED. COORDINATE WITH 1/4 WEDGE ANCHORS. USE WS-1422 ANCHORS '-({'Ir"°' lii , n ti`s , s ~t. ~7~1r's n~„?r'` i.~"''~~,~~ 7 1~. • CHECK POND INLET PIPES FOR UNDERCUTTING, REPLACE RIPRAP, AND REPAIR SAP} qa g BROKEN PIPES. / \
' ' ' ' • BY REDHEAD OR EQUIVALENT NCDENR LOCAL INSPECTOR. o a 'r r i r ;s 6.
y5 WASHED STONE 4 T~ f ' „r 3. RESEED GRASSED SWALES, INCLUDING THE VEGETATED FILTER IF APPLICABLE. NECESSARY. REPAIR ERODED AREAS IMMEDIATELY. 5-X5-X3/8- f,...~ ; , ; . • . ` TWICE A YEAR AS STEEL \ STAINLESS
..i"~, o '',t a c.:°r~r :,.y i Y r ~:a 1' ~i a:' la.CLASS I RIPRAP PROJECT: 03055 . u ANGLE \
G a 4 s `t- 1 r ZLJ -6" C. EVERY SIX MONTHS /
kJ v' ~ ~ 3 : t iz F , a ti) ~ r µr y, ~ r t r ( -M~ 2"X4" CLEAN OUT STAKE ' _ _ 1. REMOVE ACCUMULATED SEDIMENT FROM THE BOTTOM OF THE OUTLET STRUCTURE. DATE 10/19/04
,YCLEAN OUT BASIN WHEN _ G / I DRAWN BY: STC 2. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE POND. IF DEPTH IS REDUCED
"ti' a.'' \r~f r is ) s. wa. 1 .J~~"„1c~ r lb .c r SEDIMENT REACHES TOP , a o _ ~ - , , ~ - TO 75% OF ORIGINAL DESIGN DEPTH, SEDIMENT WILL BE REMOVED TO AT LEAST 1.0' ORIGINAL DESIGN DEPTH. TYPICAL / CIfCIC® BY. STC
OF STAKE. REFER TO r•'' A' o EROSION CONTROL PLAN D. GENERAL.
FOR SEDIMENT STORAGE a O o Ll= / 1. MOW THE SIDE SLOPES, NOT INCLUDING NORMALLY SUBMERGED VEGETATED SHELF /
ELEVATION. a ; 12' ACCORDING TO THE SEASON. MAXIMUM GRASS HEIGHT WILL BE 6". \
A `~.;a•` DISSIPATED FLOW OUT IN iv OUT 2. CATTAILS, AND OTHER INDIGENOUS WETLAND PLANTS, ARE ENCOURAGED ALONG
R` o _ OUT a a a P - - - PLAN THE POND PERIMETER. HOWEVER, THEY MUST BE REMOVED WHEN THEY COVER \
THE ENTIRE SURFACE AREA OF THE POND. ( \ ~ / 3. THE ORIFICE IS DESIGNED TO DRAW DOWN THE POND IN 2-5 DAYS. IF DRAW DOWN v'-.- STORMWATER
IS NOT ACCOMPLISHED IN THAT TIME, THE SYSTEM MAY BE CLOGGED. THE SOURCE 90, OF CLOGGING MUST BE FOUND AND ELIMINATED.
a a a a a a i i REBAR - go, STAINLESS STEEL MANAGEMENT
18" RIPRAP s:j EARTH 6" GRAVEL N 4. ALL COMPONENTS OF THE DETENTION POND SYSTEM MUST BE KEPT IN GOOD ANCHOR BOLT. EPOXY N WORKING ORDER. IN PLACE BASIN
WIRE MESH COMPACTED-!
a Q:. „ . SECTION A-A FILTER FABRIC HARDWARE CLOTH ACROSS ALL OUTLET " MECKLENBURG SCHOOLS SYSTEM WILL BE THE RESONSIBLE PARTY FOR
OPENINGS. REFER TO DETAIL 'A' FOR 1 IA 5. UPON COMPLETION OF THE POND AND PROJECT DEVELOPMENT, CHARLOTTE- t - OPERATION AND MAINTENANCE.
ADDITIONAL INFORMATION. CONTRACTOR - , - - - r a < s• f 1 TO REMOVE HARDWARE CLOTH, RIPRAP + . a a 0 18 " RIPRAP
DETAIL A ND WASHED STONE AFTER SITE HAS A 6" GRAVEL FULLY RESPONSIBLE FOR CONTACTING APPROPRIATE
BEEN STABILIZED. COORDINATE WITH COMPACTED NCDENR LOCAL INSPECTOR. EARTH SECTION B-B IN B-B FILTER FABRIC 1. CONTRACTOR IS PARTIES AND ASSURING THAT EXISTING UTILITIES ARE LOCATED PRIOR TO
H BEGINNING CONSTRUCTION. CALL NC ONE CALL CENTER
2. CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES, USING FLAG BEFORE YOU DIG 1001
MEN, ETC. AS NECESSARY TO ENSURE THE SAFETY OF THE PUBLIC. STOP STAINLESS STEEL
OUTLET STRUCTURE EROSION CONTROL Mccf'-'%acURES LEVEL SPREADER DETAL 1-800-832-4949 ANGLE CUPS 3. ALL PAVEMENT CUTS, ASPHALT OR CONCRETE, ARE TO BE PLACED AVOID UMUTY TYPICAL
ACCORDING TO STANDARDS OF THE NORTH CAROLINA DEPARTMENT OF DAMAGE
TRANSPORTATION AND CMU SPECIFICATIONS.
4. SHORING WILL BE ACCORDING TO OSHA TRENCHING STANDARDS PART OUTLET STRUCTURE ANCHOR SOLUTIONS THROUGH LISTEMC
1926, SUBPART P. OR AS AMENDED. rim
6 h"' CONSTRUCTION 4 5
2 3 1

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t 11 C ~ ~ \ ~ /1 ~ I \ \ \ \ COPYRIGHT 2003 ALL RIGHTS RESBtV®
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/ ' J f yri' ! l Jl / II I ( r t. JII I II 1i=` 11111 II ll f~ / / \ DATE 2r09i04
I I I I I li I I I I 1111111 ~ - v ~ _ ~ ~ II I I I ? x / ( I DRAWN BY. STC
t ~ II I \ ~ I 1 l 11 III I I 1111 ~ y v 1 ~
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C- 00 - - - - = - - _ / 1 I 1 ! _ 1 OVERALL
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1 1 r ? .-.~.:,~"'e§ 1: ~,;~a ~ ~ .r.. / j ~ ~ _fi;'~ ~l ~ ~ ~ I / , ~ "ail - ~ I I
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Jill N . W.. + r
LC) 14
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SOLUTIONS THROUCH LISTL INC 0 50 100 200 300 400
1 2 3 SERVICE BY DESIGN
4 5 6

f ~ 1 4 f ~ / /
VERT OU LENGTH SIZE SLOPE FROM TO INVERT IN INVERT OU LENGTH SIZE SLOPE
1 1 { { / FROM TO INVERT IN INVERT OU LENGTH SIZE SLOPE ~ 1 1 1 \ ~ SLOPE FROM TO INVERT IN INVERT OU LENGTH SIZE SLOPE FROM TO INVERT IN IN 69 728.38 61 t5 inch 0.0051 YI~114 MH~115 723.50 718.50 44 15 inch 0.1136
r ~ I / YI 2 762.00 759.50 29 15 inch 0.0862 t ! 1 i \ 1 c1;1 ~ 0.0862 YI 9 MH A 736.95 736.68 54 15 inch 0.0050 YI 5 MH 8 728. 0.0050 45.31 744.98 66 15 inch 0.0050 MH~115 F1:S~116 713.95 713.80 29 15 inch 0.0052
` \ 1 \ I 1 .61 137 15 inch 0.0050 - ` ` I \ L ~ _ YI~l2 YI~3 759.30 758 0.0050 MH~40A YI~408 736.66 736.47 42 15 inch MH~76 MH~77 7 15 inch 0.0051 8 744.78 743.32 64 15 Inch 0.0228 YI 117 FES~116 718.31 718.00 61 15 inch 0.0051
/ \ i 151nch 0.0051 I ~ \ \ YI~3 CI#4 758.41 758.07 67 0,0051 YI#40B YI~41 736.47 736.05 83 MH~77 MH~k7 18 inch 0.0051 0 742.87 742.28 82 18 loch 0.0072 q 19 q 20 716.55 716.41 27 15 inch 0.0052
~ ~ I \ I ~ CI~4 CI~f5 757.82 757.55 54 18 inch 0.0050 0,0050 YI~41 YI~43 735.80 735.38 83 MH~78 MH~B 15 inch 0,0100 q~120 HW~126B 713.53 713.50 7 15 inch 0.0043
/ \ \ ~ 1 ~ CI 757.35 756.72 126 18 inch 0.0050 \ \ I 1 ~ ~ cr G 0 50 YI 2 YI 3 735.75 735.63 24 15 inch 0.0050 MH~79 MH~80 743.75 742.53 122 ,00 0.0050 MH YI 1 742.08 740.25 63 18 inch 0.0290 YI 121 FES 122 717.18 717.00 36 15 inch 0.0050
1 ~ ' \ \ 1 ~ ~ 757.80 75 15 inch 0.0293 0.0293 YI~43 MH~45A 735.36 735.15 46 18 inch ~i80 ~8 . 5 249 18 inch 0.0309 q~123 FES~124 721.33 721.20 25 15 inch 0.0053
\ ` .r \ \ 1 ~ CI 7 DCI~B 756.22 755.54 136 24 inch 0.0050 0,0050 MH~45A Yi~458 735.15 734.90 49 18 inch 0.0051 YI~i81 DI 5 740.05 732 3 737.68 736.89 57 tai inch 0.0139 FES#129 q~130 756.15 755.04 40 18 inch 0.0278
_ _ ~ r / \ \ \ 1 .3B 238 36 inch 0.0050 ~ ~ ` _ \ \ ~ 1 DCI~d6 CI~10 754.54 753 0,0050 YI YI 734.90 734.46 87 181nch 0.0051 DI~82 MH/83 181nch 0.0050 0.0050 17 4 736.69 735.70 108 15 inch 0.0092 q~30 FES~131 754.14 754,00 28
~ ~ ~ ~ ~ 1 0.0608 - ~ ~ / " \ \ \ \ \ / r 1 ~ HW~9 DG~B 757.50 756.04 24 18 fnch 0,0608 YI~46 MH~37 733.96 733.64 64 241nch MH~83 ~ .0404 DI 5 735.45 732.35 181 18 inch 0.0171 MH 328 TD 744.24 744.06 18 18 inch 0.0100
- - - / \ ~ / G 0 DI 3 753.16 750.66 201 36 inch 0.0124 0.0124 YI 7 YI 737.62 734.71 72 151nch 0 YI~84 ~8
/ ~ ~ \ \ \ \ \ - J CI~11 G~10 757.50 757.00 65 15 inch a0077 YI YI 9 737.50 736.50 45 15 inch 0.0222 DI~85 DI~86 731.85 728.89 119 24 inch 0.0249 aoo77 I~
\ / / ~ \ \ \ / 1 61 15 inch a0164 r- \ / \ \ \ i j ~ G~12 Gp10 756.00 757.00 0.0164 YI~49 CI~i1 730.45 72&00 140 54 inch 0.0175 DI 6 CI 7 728.89 726.90 71 24 inch 0.0280 0,0050 CI~50 CI~51 736.09 731.75 63 15 inch 0.0689 CI 7 MH 8 726.90 726.63 54 36 inch 0,0050
\ l \ \ l \ 1 ~ I 6 750.16 749.63 106 421nch a0050
~ \ . \ 1 \ \ / ~-%""r ~ \ , • 197 24 fnch 0.0050 ~ ~ \ ~ i \ ~ DG 4 DI~13 75265 751.66 0,0050 YI~52 YI~53 726.96 726.55 81 151nch 0.0051 MH~BS CI~89 726.63 726.03 119 421nch 0.0050 LENGTH SLOPE 42 Inch 0.0052 FROM TO INVERT IN INVERT OU
\ \ / \ I \ ~ 0.0362 \ - / 11 .r,,-- MH~15 DCI~14 756.80 753.40 94 15 fnch 0,0362 q 1 YI 3 726.30 725.50 30 54 inch 0.0267 CI 9 CI 0 726.03 725.92 21 .0050 AYI~133 AYI~134 748.67 748.45 22 8 inch 0.0100 ~ ,
r i ~ 1 .~i 0 ~,l T s' 42 inch 0.005 H T ~ 7 142 1 ~ ~ 1 \ _ - ~ : \ MH/18 YI~21 749.43 748. 2 0.0050 YI 3 MH~54 725.50 724.46 207 54 inch 0.0050 q~90 q~91 725.92 725.38 107 42 inch 0 . ~ AYI 34 AYI 38 748.45 745.79 27 B Inch 0.0985 ,
~ I ~ - - ~ - 1 ' / ~ I . 7 105 15 inch 0.0050 ~ ~ ~ UB~~C Q ti~ 's. \ -i t G 7 DI/18 780.20 759 6 .0050 MH 4 FES 724.46 724.21 50 54 inch 0.0050 CI~91 CI~92 725.38 724.95 85 42 inch 0.0051 0 ~ ~ AYI~135 AYI 36 746.56 746.16 40 12 inch 0.0100 .
1 ~ ~ 8 YI 9 759.47 755.40 51 151nch 0.0798 r \ lY~ I ( ~ l DID i[h : ~ 1.. _ / ~ ~ 1 ~ inch aoo5o 0788 YI 6 YI 7 737.50 737.02. 96 15 inch 0.0050 CI~92 YI~93 724.95 724.72 45 42 inch 0.0051 0.0100 0, ~ ~ AYI 36 AYI 37 745.91 745.51 40 151nch ,
~ ..,1-.~ \ ~ YI 19 YI 0 755.20 754.68 108 15 YI 7 YI 8 737.02 736.64 76 15 inch 0.0050 YI~93 CI~94 724.72 724.28 88 42 inch 0.0050 0,0050 ~ ~ 38 745.51 745.21 30 15 inch 0.0100 , inch 0.00 CI 4 5 724.28 724.07 42 42 inch 0,0050 A~ 37 AYI
_ ~ / YI~20 MH 8 754.46 753.38 55 15lnch a02oo / / - / \ 1 0.0200 YI~'S8 YI/61 736.64 738.12 103 15 ~ ~ AYI 38 AYI 42 744.96 744,52 44 18 inch 0.0100 0.0050 52 181nch 0,0050 ~ ~ •
'~=draw-~"`~'"~.-'"°`^~-=. •"°"'=`~G.~ .a,. r yr.:'~ ~ \ 748.52 748.12 79 42 inch 0.0051 0.0051 ~ii~9 YI~60 737.50 736.94 111 15 inch STl 6 STl 7 757.00 756.74 , AYI 39 AYI 40 748.25 747,85 40 10 inch 0.0100
YI 2 MH~24 747.92 747.49 85 42 fnch 0.0051 0.0051 YI1)80 YI~1 736.74 736.12 107 15 inch 0.0058 ST1~97 MH 8 756.54 747.88 44 18 inch 0,1988 , i 0.0050 A17 ~ A~ 41 747.68 747.28 40 12 inch 0.0100
f 1 ~ ` ` 1 - / / \ \ 752.32 40 15 inch 0.0100 / 1 YI 23 YI 22 752.72 YI t MH 2A 735.87 735.63 47 18 inch 0.0051 MH/98 YI~99 747.68 746.96 143 18 nch 745.02 30 12 inch 0.0753 . 0.0100 AYI~141 AYI~142 747.28 MH 2A YI 28 735.83 735.44 37 18 inch 0.0051 YI~99 YI~101 746.96 746.25 141 4 Inch 0.0050 16 inch 0.0100 '
' \ - i 4 q 747.29 743.30 139 42 inch a0287 0.0287 i~ N8 AYI~142 MH~132B 744.52 744.24 28 Charlotte-Mecklenburg Schools ,
1 ~ _ r / ~ ~ , , ~ / 1 i ( r Sll 8 754.70 753.60 46 15 Inch : ,.0.0267 B7 YI~28 YI~63 735.44 735.02 83 18 inch 0.0051 YI~100 YI~101 746.99 746.25 148 15 inch 0.0050 .,.0.02
B / ~ _ /J~ ~ \ ;~.,_..a,. _ / Sll 8 MH 7 752.76 76239 71 24 inch 0. 51 51 Y1~t63 Y1~64 734.52 734.10 83 24 inch 0.0051 Y1~101 Y1~102 746.25 745.49 151 24 inch 0.0050 0.
/ ~ ° 1 I 1 \ \ \ „ / MH 7 YI 8 76219 750.73 211 24 fnch 0.0069 i / i ) I 0.0069 11 4 MH 6A 734.10 733.86 48 24 inch 0.0050 YI 02 MH~106A 745.49 744.60 178 ' 4 inch 0.0050 66 739.50 737.00 29 15 inch 0.0862 YI/103 YI/104 746.92 746.04 175 115 inch 0,0050 . 0.0301 YI~65 YI
( ~ / / i i \ 1 / I / 750.53 748.00 84 24 inch a0301 1 _ _ l f YI~26 1r1~3o 1 ~ ~ .y. ,,,,Y. r i / 050 YI 104 YI 105 746.04 745.23 162 , 5 inch 0.0050 FROM TO INVERT IN INVERT OU LENGTH SIZE SLOPE . 0.0090 MH 6A YI 68 733.86 733.68 36 24 inch 0.0 ~ ~
- ~ 1 ~ ` \ i ~ / 42 15 inch 0.0090 \ / ! ; + r- ~ J J j ~ YI 29 YI~30 749.13 748.75 - - _ ~ / ! 1 _ 1 i f / i 0.0050 6 745.23 744.60 125 18 inch 0.0050 11 t YI 9 740.08 738.08 40 8 inch 0.0500 0.0050 YI 6B YI 88 733.68 733.29 77 24 inch 0.0051 YI/105 MH~10 A
1 / --1 ~ I ~ ~"E YI 0 MH 3 747.50 747.18 63 30 nch - ~ 1 1 \ 16 min o.mo2 735.60 69 15 inch 0.0058 744,60 744,45 30 0 inch 0.0050 112 MH~40A 740.08 737.26 40 8 inch 0.0705 0.0102 YI~7 YI/88B 736.00 MH 06A EX YI O6B
I kj =i ~-_wJ 1 1 YI/31 G/32 749.00 74&45 54 57 144 24 inch 0.0050 108 747.96 747.37 118 15 inch 0.0050 TI~3 YI~41 740.08 736.83 40 8 inch 0.0813 0.0015 11~BB CI~69 733.29 732. YI~107 YID
1 ~ - 1 11 ~ I a~x i i i G~32 MH~33 748.25 748.18 46 24 inch 0.0015 ~ ~ , / ~ I ! 1 / 11 ~~:-;::.;:;;::::r.:<<::: \ - I i . ~ ~ I 0.0216 1 ch 0.0050 740.08 738.80 40 8 inch 0.0320 Turnbull 3igmon Deign 0,0218 CI 9 CI 4 732.37 731.11 74 24 inch 0.0170 11108 ECI~109 747.14 745.81 285 15 n R MH A IooI Marched Square Dr.
~ - \ i ~ 1 / ~ J j MH~33 YI#35 746.98 744.50 114 30 in 7 15 inch 0.0316 MH 11 735.00 729.70 45 15 inch 0.1178 11/5 TCO/6 740.08 739,42 33 8 inch 0.0200 Suite 530 0,0298 YI 0 YI~71 752.66 747.70 15 YI~110 1~ ~ .
_ 1 1 1~/ ~ I ~ YIyy34 YIyy;;S 747.00 745.75 42 15lnch 0.0298 ~ ~ / / ~ \ ..:fie I YI~35 CI~36 744.00 743.80 41 36 inch 0.0050 460 729.50 727.70 80 15 inch 0.0300 TC0~6 YI 7 739.42 738.20 51 8 ieeh 0.0239 Charlotte, NC 28203 p,0050 YI~71 MH~72 747.50 746.35 25 15 inch 0.0 MH/111 YI~112 Phone. go4.52g.65oo
\ ~ ~ I Y / / G/36 MH~37 743.10 738.25 242 42 inch 0.0200 37 15 inch 0.0051 12 FES 13 727.50 727.00 100 15 inch 0.0050 TI~7 MH A 740.08 735.19 35 8 bch 0.1397 Fa:: 704.522.0882 0.0200 MH~72 MH/73 737.89 737.70 YI~1 ~
5.00 149 15 inch 0.0168 YI 114 MH 15 723.50 718.50 44 i5 inch 0.1136 Tl YI 3 740.08 735.85 40 8 Mch 0.1058 0.0051 MH~73 YI~74 737.50 73 ~ i~
~ / / / 1 MH 7 YI 9 731.14 730.66 97 541nch 0.0051 ~ ~ ~ a I - / / ;l3 ~ i i I.. ~ / \ .80 731.65 59 15 inch 0.0534 115 FE 116 713.95 713.80 29 15 inch 0.0052 119 MH 2A 740.08 738.46 3$ 8 loch 0.1006 00050 YI~74 CI{(i89 734 MHO S~ LAND DEVELOPMENT DESIGN SERVICES
\ ~ - ~ 1 Y 1 \ / / / / 1 YI 8 YI 9 737.50 736.96 109 15 inch 0.0050 ~ P t 1 - ~i / 1
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. \ ~ 1 l 1 / t i / / ' \ J RD#3 RD/4 783,00 762.62 19 10 bch 0.0200 \ / ~ / '
i 1 \ \ 4' I I ~ \ ~1 / 1 1 1 I 1 / / 0.0445 ` / ~ ~ i / / ~ R0~2 YI/1 782.28 760.50 40 81nch
C \ 1 1 1 1 :r;:: I 1 I 1 ~ / I h ;i: / / ,w . r / l ~ RD/4 YI~2 782.82 780,50 47 10 Inch 0.0451
/ t 1 I - - r~ --1 ~ I \ / ~ / ~ ~ RD~i 11/3 763.00 760.10 28 Birch 0.1038 + ,
1 ' Ij 1 \ r 1 - v 7 \ _ I I ? ~ iI / / ~ / / q 763.00 762.58 21 8 Inch 0,0200 ;
Y , \ / r r / :y,~ . ~ RD RD 763.00 762.28 36 81nch 0.0200 ,.f. ~ / ~ ( / 1
\ I \ + c~ _ / Y / Y . 1~ / / / I . / / 1 i I `i _ 1 I I ~ / / / / \ RD RD 762.12 761.48 32 10lnch 0.0200 fix.. / / 1 ( / '
I r r . •Ci•~- + , / q 781.48 760.42 53 t0 inch 0.0200 „
/ ~ / ( ~ ~ I 1 763.00 762.42 29 8 inch 0.0200 / I ~ / RD~10 RD~1
1 \ r\-~ r~~\ r / Ili ~ \ 1 \ \ J~J , I ~ / / 1 ' ~ 1 J - 761.54 36 10 loch 0.0200 ry::~ ~ ( ~ V / / " \ RD/11 RD~12 762.26 , k , . / / I ~ \ ~ / \ 11
l ~ 1 1\ \ ~ Y r I ` / ~ _ ~ / \ Q ( ~ RD~12 q~6 761.54 760.42 53 10 inch 0.02 / r- \ \ ~ / ~ ~ r'' .0200
\ / - f / RD~13 RD~14 763.00 762.06 47 6 inch o CHARLESTON • CHARLOTTE
/ ~ 1 J " ` ~ ~ ~ RD 14 RD 5 761.73 761.27 23 12 inch 0.0200
, 1111 I \ ~ t , , ~ . ~ l c ~ i 1~ 1{ ~ ~ / / I I ~ ~ / RD 15 RD 6 761.02 760.06 47 15 inch 0.0200 J I ~ / 11' ~
1 1 w y F Y Y 1 I ! 1 1 1114 I t \ - \ \ \ ~ . > ~ I - \ \ / • ( ~ ,~~1 ( 1 / .08 758.20 94 15 inch 0.0200 / _ ~ _ J \ RD~16 q 2 76o SSOCIATES LTD. \ \ _ / ~ LS3P A
11 l It~l I \ \ \ ~ '~I I ~ ~ r 1 / ~ ~ ~ ~ 1 ~ / ~ \ , ~ , / r ~ RD 17 RCO B 763.00 760.13 38 8 Inch 0.0755 ~ ~ \ 1 ~ ~ 112 SOUTH TRYON
• i - ~ / / \ \ , RCO 8 TD 760.13 759.96 34 8 inch 0.0050 _ ~ - ~ ! \ 1 ~ C#~IARLOTTE, NC 28284
~1 1 1111 1 I \ r_ L L/ 1 \ I : _ \ \ / \ \ RD~19 RD~10 763.00 762.30 35 8 inch 0.0200 ~ ~ 1 Ta. 704.333.6616 FAX [phone]
i ~1 111,1 e ~ - ~ ~ ~ ~ ~ ~ \ ~ ~ _ " - RD~20 RD~21 762.14 761.46 34 10 inch 0.0200 r,. HTTP!/WWWLS3P.COM
\ • ~ ~ ~ \ \ s D \ ~ RD~21 RD/22 761.29 760.35 47 12 Inch 0.02
D i Y Y _ , J ~ ~ \ \ ~ ` I / ~ \ \ ~ - - RD 22 RD 23 760.10 759.22 44 15 inch 0.0200 r44i
I I I 1 111111 1 i ~ _ .ate ~ I I I ~ / //r ~ _ \ \ \ / - MH 5 759.22 757.00 82 15 Mch 0.0271 .•••N"• •
~ ~ Iii 1 1 1 \ - \ I t Y f + 5 1 I / . / / \ \ \'M t l l I 111 1 1 \ ~ _ ~ . ~ I ~ \ \ I r//// / l 1 ''`~°.-~..1 ?Y ~ - ~ / ~ 763.00 747.50 24 8 inch 0.6458 . 0 , \ ~ ~ \ d \ ~ RD 24 RCO 25 ~1_ ) ~ ~ ~
/ III 1 \ - ~ _ I , / / , I RCO 5 RC0~26 747.50 746.77. 36 8 inch 0.0203 _ ;
~ ~ 1' : \ / + I \ - RCO 26 MH 6 746.61 745.73 44 10 inch 0.0200 ~ -
/ ~ 1 ~ 1~ A 11 J l //1 ~ I I ~ ~ ( ~ \ ~ I / r. l \ I a~ / { / I 1 / \ / 1 ~ I I{ , ~ ~ • 9.00 748.52 24 B inch 0.0200. ~.t~ 3'; / n, e r..~ / \ ~ l r 1 ~ ~ RD~27 RD~28 74 i, (n aN~ Q' I . h~\ S i ) ( 748.04 24 8 inch 0.0200 '9 ~ N
1 \ ~ I ill l ( 1 / - 1 I I \ \ / S_ 11 / J / XI 1 1 ` ~ / I j / j; J / ~ a ~ \ \ ~ \ / / \ ~ I - _ RD~28 RD~29 748.52 y, . , ~ . • ! ~ ~ , i , ~ err T CAS-~'~~~`..
( / ~ ° , 1) I / 1 I r v , RD 9 MH 6 748,04 745.89 17 8 inch 0.1265 rnir 07 15 04 l l ,J ~ ' \ 1 ~ 1 \ ~ ~ ! ~ I i 749.00 748.28 36 8 inch 0.0200
r ~ i ~I I s ~ ~ I RD#30 RD~'31 / ~ ~ 1 / / ~ 1 y I ( \ 1 I { ( ~+aa?nanup~rrr r ~ ~ ~i / II I/ ~ ~ ` / I i RD 31 MH 7 748.28 747.50 18 8 inch 0.0433 riq~
1 / / # 11~ ~A' p 1 / t ~ X11 ~ I ~ / I ~ RD 2 RD 749.00 748.56 22 8 inch 0.020
r \ ~ ~ \ \ ~ r l / / l l 11 l l I , 1 ~ ~ / 1 1 inch 0.0200 l
\ \ \ \ \ \ I Q / ~ I / , l / I \ / I / / , / I ( • ~ ~ . I ` \ \ RD 3 RD~34 748.56 748.08 24 8 ~ t ( 1 , ~ \ \ \ 8 inch 0.0341 ~
/ ~ i ( / a : I / / \ RD/34 MH/77 748.08 747.50 17 ~ _ ? ( ( ~ I i~ ~ v v v v v -223 - ( I ~ ~ M / / A \ 9 749.00 744.53 33 8 inch 0.1355 -s ; u~ t
\ \ _ / \ 1 1 \ ~ 1 \ \ \ ` ~ / 1 \ / / 1 ~ ( ,l ( / I ~ A \ \ RD~35 MH/1 ~ ~ ~ O ~ l r 11 v I t , l / 1i / I / \ \ ~ ~ 8 loch 0.0100 . ~ ~ . ,
1 ~ i ~ I / I / JT ~ ~ ~ \ \ \ RD 6 RCO 7 749.00 748.83 17 ~ ~ ~ y
1 1 \ / . ~ , J 1 J 11 11 / „ ~ ~ \ \ \ \ RCO 7 RD 748.83 748.34 49 B inch 0.010 6 N•••••N 0 ~ ( J / / / 1 / ! i \ \ \ ~ \ \ 748.22 12 8 inch OA100 '~i << GHA
1 \ \ ~ r ! f ; ll/ /I / r ! . ; ) \ \ \ RD~38 RD~39 748,34 rrrq /S I / / , ( f ( / / / ~ I -,J \ \ ` \ \ 10 Inch 0.0100 rhinnnnnn++
t I : _ _ v / ~ J i((/l/ /ll \ \ \ R0~39 RD~'4o 748.06 747.70 36
l /llllll /ll ~ \ \ RD RD~41 747.70 747.34 36 10 inch 0.0100 hgri 1 ~ I 1 1 1~ ~ I I lI 11 / i I i- \ \ ~4R l d' ((lf l 11 ~ t - \ RD 2 747.17 747.05 12 12 inch 0.0100 0
/ / / ( ~ \ RD 2 RD 3 747.05 746.69 36 12 inch 0.0100 0•.•• ~ W _
/ , l I ( l ill 11 l 1 ~ ~ / / / l / ! / / ~ tea--- I ~ s ( / ~ RD~43 RD,~44 746.44 746.08 36 15 inch 0.0100 s s
\ / I / i I ~ / ! ~ 745.9s 12 15 loch O.otoo - -157 - ~7 ~ /l Jl / RDy44 RD 746.08 = . ~ ; a c \
~l//// ! I ~ _ ~ . . / / ( 1 ;~Y 1•-•I i / 45.96 743.95 86 15 inch 0.0234 `'-~ti~ / / / 11/JI / / / / RD~45 MH~79 7 's s+j' t 4
~ / ~ / 1 I 1f I / / \ / / 8 loch 0.0100 s r . ~(l f 1111 l l/ ; 1 / / / RD/46 AYI~139 749.00 748.41 59
• " / / ~ ~ 1 "tj'I i / RD 7 RD 9 749.00 748.79 21 8 inch 0.0100 q~ S~ ~5
~ \ _ !//llllf~ l 11 / • I f 1 9 749.00 748.79 18 8 loch 0.0117 rriq RD~48 RD/4 rgpwuna
_ _ ~ \ \ 11 I o l 11 1 } 1 t / l I I I I/ / ~ ~ / RD~49 R0~i0 748.63 748.39 24 10 inch 0.0100 MENIB~S ~ TfE AMHtICAN NS'RME OF ARCH(ECTS
\ \ ~ 1 'fit ~ / / 1 I l RD/50 RD 1 748.22 747.98 24 121nch 0,0100
COPYRIGHT 2003 ALL RK2iTS RES9tV®
~ ` ~ 11.x!1 11 ,fl ~ ~ RD t AYI 35 747.98 746.56 21 12 inch 0.0676 pIIAIL - E A PERMIT. .0224 ~~a MD pF~J. ~101@QL 1. ON SITE BURIAL PITS REQUIR RD 2 RCO 749.00 748.82 17 8 inch 0
~ s ~ \ 11 , ~,~ll fit \ ~ 1 RD 3 RC 4 749.00 748.62 19 8 inch 0.0200 DOQIMHVTAl10N MAY NOT BE RI~RODUC»
\ \ ~ ~ 7 . } \ \ \ • r, I I 1 1 / eta / i I I 11\~~~~ ti 1 V 1 I I / ~ / 2. ANY GRADING DONE BEYOND THE DENUDED IJMITS INDICATED ON THE _ ~ _ CONSTRUCTION DOCUMENTS IS A VIOLATION AND IS SUBJECT TO A RCO/54 AYI/136 748.62 746.49 14 Bloch 0.1521 p ANy FORM yyR}10UT WRiTiBV PBtMISSION
1 11\ j I \ I I ~ / / ~ PROPOSED CONTOUR ~ ! I II 11111, Ir \ ,~~~,h,: / ~ / / , ~ ~ y ~ ~ PROPOSED SIDEWALK FlNE. RD~55 RD/56 749.00 748.76 24 8 inch 0.0100 QOM ~P ASSOOAT6S LTD.
/ / / III 1 I \ \ , : ~ alb, ~ / ~ 1 / / / , ~ I 1 111. ~ ~ o~ ~ / / / / ACRE WITHOUT AN APPROVED EROSION RD 7 748J6 748.54 22 8 inch 0.0100 3. GRADING MORE THAN ONE RD ~
~ ( i l , , , . ~t ! i ~ / / , / I 1 III ;;,y N , ~ . ~ J~ ~x ! / / / ~ CONTROL PLAN IS A VIOLATION AND IS SUBJECT TO A FlNE. RD~57 AYI~134 748.54 748.45 9 8 inch 0.0100
/ t; ~'7 t / / ~ ' / / / ! i I ~ ~ • ~ ~ ~ f l~ / PROPOSED INDEX CONTOUR / PROPOSED RIP RAP APRON CMLDS X20.23
4. ALL FlNAL CURB AND STREET GRADES AT INTERSEC110NS SHALL BE RD/58 RD/60A 763.00 762.06 47 8 inch 0.0200 NSPECTOR. 0 81nch 0.0470 ~ COORDINATED WITH I RD~59 RD~60A 763.00 762.06 2
/~i// l,r ~ 1. 1 / RD OA FES OB 762.06 752.00 53 8 Inch 0.1898
_ ' - ~i nisi / \ I ~ (1 ~ I r / / - - i ~ i I 1 Ili 7 \ \ I ! ' 1 / CONTOUR CMLDS .02 5. SIGHT TRIANGLES INDICATED ARE THE MINIMUM REQUIRED. ~ ~ - -XX PROPOSED TREE I~ RD 2 757,83 757.35 24 B Inch 0.0200 XX PROTECTION FENCING ~ 1 ~
4~1 I l ( ;0~f ~ l 1 , ~ 1 + l / / J / / / ~ EXISTING nr nnue~eunrnu Mn1u1C11TC IC 6111T au ?11711MI70T1AN _
0. ArrmuVAL VP v VvmQ u%,iiwn uvvvmu•w w nv TO GRADE ADJACENT PROPERTIES. WHEN FIELD CONDITIONS WARRANT RD #62 RCO 3 757.35 756.95 20 8 n
OFF-SITE GRADING, PERMISSION SHALL BE OBTAINED BY CONTRACTOR R 3 MH 6 756.95 754.89 103 8 inch 0.0200
l EXISTING FEMA 100 YEAR FROM THE AFFECTED PROPERTY OWNERS. RD 4 RD f65 754.33 754.20 20 8 inch 0.0069
/ 1 L ( \ --.ti Ii / / EXISTING INDEX CONTOUR / I-N FLOOD ELEVATION 7. IN ORDER TO ENSURE PROPER DRAINAGE, CONTRACTOR SHALL RDf85 Y1f21 754.00 752.88 18 8 inch 0.0729
g+r ? 1 \ \ \ /1 .0e J, MAINTAIN A MINIMUM OF 0.5% SLOPE ON THE CURB. RD f58 RCO 7 754.50 754,42 4 8 Inch 0.0200
8. SUBSURFACE DRAINAGE FACILITIES MAY BE REQUIRED IN THE STREET RCON87 YI/23 754.42 753.30 28 8 inch 0.0400
PROPOSED _ DRAINAGE SWALE EXISTING STORM RIGHT OF WAY IF DEEMED NECESSARY BY THE INSPECTOR. RD #68 RD #69 739.50 739.00 25 81nch 0.0200
9. THE CONTRACTOR SHALL MAINTAIN EACH STREAM, CREEK OR RD#69 CI#50 739.00 736.67 60 8 inch 0.0388 BACKWASH CHANNEL IN AN UNOBSTRUCTED CONDITION AND SHALL
- ^ - i , . ~v ~ A III / / /l/l~" it r ~ PROPOSED I \ y I / \ r J 9f r CMLDS 0.25 CMLDS X20.25 RD 0 RD~71 741.50 741.10 20 8 inch 0.0200 AND REMOVE OTHER FROM THESE ACCUMULATIONSAREAS. ALL DEBRIS, LOGS, UMBER, TRASH, JUNK RC02 741.10 740.80 25 8 inch 0.0200
r / j lr~ r ,..A yz : STORM DRAINAGE / / \ \ \ , .a.k~, \ 111 I I r / ~ / R00/72 Y1f88B 740.80 737.83 52 81nch 0.0532
10. ANY CONSTRUCTION OR USE WITHIN THE AREAS DELINEATED AS MH 2 747.50 748.93 24 8 inch 0.0238
( ~a ? \ \ \ I \ \ 1 I , r ( ; / J PROPOSED ROOF DRAIN - TREE PROTECTION NOTES: FLOODWAY DISTRICT FRINGE BOUNDARY LINE OR FLOODWAY DISTRICT RD/73 ENCROACHMENT BOUNDARY LINE IS SUBJECT TO THE RESTRICTIONS RDf74 RD#75 755.00 754.60 20 8 inch 0.0200
LINE WITH CLEAN OUT IMPOSED BY THE FLOODWAY REGULATIONS RD75 RC076 754.60 754.20 20 8 inch 0.0200 1. NO SOIL DISTURBANCE OR COMPACTION, CONSTRUCTION MATERIALS,
46 TRAFFIC, BURIAL PITS, TRENCHING OR OTHER LAND DISTURBING 11, THE LOCAL ENGINEERING DEPARTMENT HAS NOT REVIEW AND DOES NOT
/ 1 l/ r _ t~ / l l 1 f CMLDS #20.01A.1 CMLDS #20.01A,9 ACTIVITY WILL BE ALLOWED IN THE TREE PROTECTION ZONE. TREE ASSUME RESPONSIBILITY FOR THE STRUCTURAL STABILITY OF ANY
1/1 1 ( \ \ / Cl E3M PROPOSED CURB INLET CMLDS #20.02A,1 e9 l I t 1 I l - / J J J 1 ~ / 1 ~ ® t ti III \ r ~ CMLDS #20.02C CMLDS 20.02A,B BARRICADES MUST BE INSTALLED BEFORE ANY DEMOLITION, GRADING EXISTING OR PROPOSED RETAINING WALLS ON THE SITE. PRO~Ci: 03055 ~ SYSTEM DRAINAGE TRENCH CMLDS #20.02C OR CONSTRUCTION BEGINS, AND NOT REMOVED UNTIL FINAL
G CMLDS #20.12 CMLI)S X20.12 INSPECTION. 12. NON-STANDARD ITEMS (I.E.: PAVERS, IRRIGATION SYSTEMS ETC. IN FROM TO INVERT IN NVERT OUT LENGTH SIZE SLOPE DATE 10-19-2004
I ) 11 l \ \ \ a\~,. 2. TREE PROTECTION BARRI THE RIGHT OF WAY REQUIRE A LOCAL OR STATE ENCROACHMENT CMLDS 0.03 BARRICADES MUST MEET OR EXCEED TREE AGREEMENT PRIOR TO INSTALLATION. TDN1 MH#15 759.80 757.42 50 10 inch 0.0476 DRAWN BY: HOC
PROPOSED DOUBLE CMLDS N20.03 DCI I \ \ ! \ \ \ CURB INLET CMLDS 0.12 CMLDS 0.12 ORDINANCE STANDARDS (IN CITY OF CHARLOTTE TREE ORDINANCE GUIDELINES, APPENDIX 9) OR LAND DEVELOPMENT STANDARDS MANUAL
CMLDS #20.04A.1 I \ \ \4/ y r CMLDS 20.04A,8 13. ALL "STD" NUMBERS REFER TO THE CHARLOTTE-MECKLENBURG LAND 713#2 MH#54 732.50 731.86 32 8 inch 0.0200 4EQ® BY: BCS 744 O6 743.07 99 18 inch 0.0100 DTL 40.04. TD MH 8 DEVELOPMENT STANDARDS MANUAL
N, ofta-- j CMLDS X20.09 CMLDS #20.09 3. BEFORE GRADING/CLEARING/CONSTRUCTION BEGINS, CALL FOR
m3moo \ \ 1 \ 3 i "C li _ , J , \ r 1 1 MH 10 \ \ 11 /I \ \ \ \ it I / PROPOSED MANHOLE CMLDS X20. J°hnston 14. ALL SIDEWALKS, STOOPS, TERRACES AND OTHER PAVED AREAS SHALL CMLDS #20.10
Oehler \ \ \ ' I , . ) / / Rd ~ \ I \ \ \ \ \ - / / CMLDS 0.12 CMLDS INSPECTION OF TREE PROTECTION BARRICADES BY URBAN FORESTER. SLOPE AWAY FROM BUILDING(S) AT A MINIMUM OF 27L ~0.12 CUL V_ EERT STORM SYSTEM
' 1 \ 11 1 i ~ \ \ = it r / , 4. NO GRUBBING WITHIN TREE PROTECTION ZONE. LEAVE SOIL AND LEAF 15. CONTRACTOR SHALL CONTACT INSPECTOR 48 HOURS BEFORE
I I l 1 ~1 ` \ \ \ \ `r ri J I 0 1 \ \ \ \ \ - \ 1 PROPOSED FLARED 11 I I ili \\Y 1 t \ \ l/ rr I LITTER UNDISTURBED. SUPPLEMENT WITH 1-2 INCHES OF MULCH. CONSTRUC110N FROM TO INVERT IN INVERT OUT LENGTH SIZE SLOPE . CMLDS #20.23 RE-SEED WITH GRASS ONLY IN DISTURBED/GRADED AREAS. HW#125 HW#126 712.50 712.30 45 (2) 72" CMP 0.0044 5. BRUSH, VINES AND SMALL TREES (C8 IN. DIAMETER, OR AS SMALL AS CR
MONO CMLDS #20.23 ~f I 1 i \ i \i i \ \ \ \ /r 1 ( ~S END SECTION f= o, 1 1 i\ \ 1 ~ \ ~ rr ) JJ ADINC PLAN
k.. ~ \ 1 X11 1 t / 1 rr/ /
\ 1\\ \ 1 \\t i \ \ ~r r 11/l CMLDS /20.17A 1 1 1 11 1 v \ CMLDS N2 2 IN. CALIPER) MAY BE HAND-CLEARED ONLY CUT FLUSH WITH DD DRAINAGE SYSTEM NOTES: o.7A ED UP 6 FEET LIMB D T (AT STORM fl
1 1 \ \ \ \ / l J Il / "K3(HW PROPOSED HEADWALL i \ \ 1\ 1 1 t \ ii \ \ \ \ . r. / , l / l / fl, CMLDS X20.178 CMLDS X20.178 GROUND SURFACE. EXISTING TREES MAY B LEAST 2/3 OF THE BRANCHES SHOULD BE LEFT) TO IMPROVE 1. ALL STORM DRAINAGE TO BE CLASS III RCP UNLESS NOTED OTHERWISE.
IT 11 , 1 11 1 \ \ \ 1111 VISIBILITY. 2. HDPE STORM DRAINAGE PIPE, SEE DETAIL ~1/C0204
a 1 \ 111 1 \ \I\ 111 1 \ \ 1 \ r ~ e 1\ 1 \ VI I i f v r I/ 111 (l!/~Jr CMLDS 20.13 6. EXPOSED TREE ROOTS MUST BE CLEANLY CUT WITH A SHARP PRUNING 3. PVC ROOF DRAINAGE
1 )I 1 I 1 \ 1\I 11i \ I \ \ \ \ / f l / ~f lt!l PROPOSED YARD S as / I I j ,1 1 I ! \ \ r rr r / / / lll, !l!f G, ~ DROP INLET CMLDS #20.14 CMLDS #20.13 TOOL; BACKFILL AS SOON AS POSSIBLE TO MINIMIZE EXPOSURE TO THE CMLDS #20.14 AIR. 4. Cl = CURB INLET (TYPICAL), SEE CMLDS DETAILS 20.01A, 20.01B
e l- ( ! 1 11, 111 1 v \ r, / l J,Jltr ' / III ,i 1 VAy J ; \ \ yn / l(J,L!(fu SEE CMLDS DETAILS 20.02A, 20.028
e~ L I I ,1 I I l h ,A VA\ \ V / f 1! l t Polk c~ t 11 i / r ( r I f// l r 1 i J 7. TREE BARRICADES MUST BE INSTALLED BEFORE ANY =0..09
e A o i I 1 \ \ \ \ \ / / i 1 J it 1 !J PROPOSED SLAB DEMOLITION/CLEARING/GRADING CONSTRUCTION, AND NOT REMOVED 5 5. . YI MH =YARD MANHOLE INLET (TYPICAL), (TYPICAL), SEE SEE CMLDS CMLDS DETAIL DETAIL 2009 UNTIL AFTER FINAL INSPECTION BY URBAN FORESTER. 20.13
H- mm~ a o I I \ \ y, \ r / , t STI 1 / 1 \ \ \ \ \ 9 \ f 1 J l J~ TOP INLET 7. HW = WINGWALL WITH SPLASH PAD, SEE CMLDS DETAIL 20.17
( / i . t~\ `g ? \ \ ~ / / i if , ///r 8. PLEASE SUBMIT UTILITY PLANS SO THAT THEY CAN BE REVIEWED FOR S. Ti = TRACK INLET CATCH BASIN 51 0 UTILITY CONFLICTS WITH EXISTING AND PROPOSED TREES: ELECTRICAL, 9. TOO - TRACK DRAINAGE SYSTEM CLEAN OUT
\ ` \ ` \ \ \ \1\' \ J \ \ \ r , / /~l l J ( PROPOSED TELEPHONE, GAS, SEWER, WATER, AND SITE LIGHTING. 10. RCO = ROOF DRAINAGE SYSTEM CLEAN OUT
I / \ \ \ \ \ !11. \ 1\ J \ \ \ f / J \ \ \111, \\\1 \ - l VICINITY/I JlJ1 A RETAINING WALL \ IS TO BE LOCATED PER PLAN OR AT A 11. NEENAH MODEL R-4996-A3 TYPE M TRENCH DRAIN WITH GRATED COVER 9. TREE PROTECTION FENCE
NTS I \ \ \ \ 1\il~\ I ` l / / 11 I I 1 MINIMUM OF 1 FOOT PER TREE DIAMETER INCH AWAY FROM THE TREE OR EQUIVALENT.
IN THE SETBACK OR RIGHT-OF-WAY. SOLUTIONS THROUGH LISTENNC
C \ \ I I I 1 \ \ 11,~\ li\l\' t I t 1 I// ll l1JJ I ( - - PROPOSED IRRIGATION SLEEVES 11 l I (2) 4- DIA. SCHEDULE 40 PVC f II II ill IIll I\\
I \ 00 400 ~1 f ! I , , t 1 \\\W II I, , \ l 1 1
0 50 100 200 3 / l 1 I t l CONSTRUCTION DOCUMENT"
3 2 4 5 6
1

I i. / / /
/ i
c L ~ r t ; ~ ~ \ - 1. OR 0 E SURE TH _ CONTRACT T N ~ ~°'~I'`rl`~` ` ~ 1 / % ~ A SURFACE OF BASE FOOTING TO ENSURE THAT OUTLET BOX IS SET LEVEL AND FLUSH WITH BASE FOOTING TO PROVIDE UNIFORM BEARING PRIOR TO PLACING
I \ / ~ / % J: ~ ~ ~ ~ SECOND BATCH OF CONCRET CH OF CONCRETE. GROUT IF NECESSARY. ALL ORIFICE AND PIPE
~ ~ %4 \ \ f - ~ ~ OPENINGS INTO THE OUTLET a 1G,/ ~ s, w a TO THE OUTLET STRUCTURE SHALL BE SEALED LEAK TIGHT. TOP OF DAM ELEV: 631.00
~ l ; ~ , USE LINKSEAL MECHANICAL ~ \ ~ ,c' .~ti / \ AL" MECHANICAL SEALS FOR ALL PIPES 24" AND SMALLER. :TAIL ~7 THIS SHEET FOR EROSION CONTROL MEASURES ASSOCIATED _ _
l \ ~ ~ / ~ / ~ ~ " 2. REFER TO DETAIL ~7 THIS SI I t.:'~•. ' ! A ~ t' ~ • i ~ WITH THE OUTLET SIRUCTURI iTLET STRUCTURE DEVICE,
/ % A a
' ~ ' r- ' i ~ ~ ' . GRATED COVER - - - TED COVER - -
I I / i ~ \ ~ ~ ~ ~,=v~ \ 1 SEE DETAIL #2 , r` DETAIL #2 TOP OF STRUCTURE ELEV: 728.66 ALUMINUM STEPS = - _ _ -
1 I ~ ~ ~ 0.e 12 O.C., TYPICAL -
I / i' / i % \ `t 1 h, -
i I ~ N~;,i'/!/ ' ~ ~ ~ v / e
, , o ~ p • PERMANENT POOL ELEVA110N _ - - - - - _ ~•~•y~ v - _ _ - - - O _
1 1 'i% ~ ~ \ ELEV: 726.00 'i - ° '..w -
I a r .'Y' ~ , ~ l t -
~til 4 ! i / ~ . . \ ' ' . ' ~Tn••S `r ~ ; TRASH ~ ~ " RACK 4.25 DIAMETER D , - - - _
I +',`y! ~J';' y, , ' % ! RAMP RAMP RAMP r 1 ,k %.1 ~~'~,~1.~~','.,j ~ ~ / CL ELEV: 724.50 ° WALL SLEEVE - - _ - -
i i ~ - - -
~ ~ ~ / ~ i / / / / , ALUMINUM STEPS I ti" y \ / ~ / ~l i' i / ,~'l,; 12 O.C., TYPICAL 'S - - - - - _ AL TURNING ROD GUIDERAIL ° - _ -
i ~ \ / jar l~ ! / / ; i , / ! ~ ! i ~ ! / ~ ! / i SUPPORTS AS NECESSARY - - - - - -
I ' V , ' ~l , / ; ' ; ~ / / ~ ~ ; / j i J ` • ' • % l,~~ PRECAST 7 X T VAULT 7' VAULT 6" DIAM. GATE VALVE - - .
/ / / I ~ ,h / / ~ . , ; . / / ,.t DIMENSIONS ARE TO OUTSIDE E TO OUTSIDE ~ ~ TO DRAIN POND TURNIN ° - - ~ - _ _ ' ~ G ) SUBMIT ROD TO BE EXTENDED TO - - - - - -
\ \ ' r~ . / / % / , ' i 7~?= , ` / CONTRACTOR TO SUBMIT ~ ~ • ; i ~ % ; / / SEALED SHOP DRAWINGS Z' ~ •T ~ 'Y • \ ~ NTi- )RAWINGS TOP OF STRUCTURE WITH ° - - - - •
1 <~y ' • - ~ ~'~;,~Y,y \ ~ FOR APPROVAL PRIOR \ ~ ~ TO CONSTRUCTION B ~ ~ PRIOR HAN WH L FOR - - - - - - ' D EE OPERATION o Schools
~ ~S i.1 , n . 1 "y~l ~ ON " - - ~ Charlotte-Mecklenbur Schools \ 6 DIP POND DRAIN r~.:. I - - - 9 ;1,• /1 ~ WITH TRASH RA I I
~.z/;`,;~, t:<.q SOLID FILL ~ : ' ' ~;r„ . N ~ GROUT~CONCRETE CK I I - o I ~ 54" ;TE I RCP OUTLET PIPE ~ ~
~0, ^ Y.• i..,~ • ,y I l ~ BOTTOM OF POND i I ®1.00 SLOPE ~ ~
1. t - ~ 1 :1 RAMP 12:1 AMP I ~ ELEV: 720 0 1 ~ ~ ~ _ •0 NV. 719.80.1 ~
' ( fi;. - I ~ ~ ~'e: r.
,~y \ p V
\ ~ BARS @ 1 " r• - -
. , . _ ~ ~ j ...d. Lam... - - I . ~ ' • , : ; . •r 1 I ~ • •'1 1 . • d • ~ _ _ ` Turnbull Sigmon Design mon Design
i a ,•d • , r. • • • 4 •i • • ~ d : ~ ~ ' ~ . ~ - - - c~''; IOOI Morehead Square Dr. :ad Square Dr.
\ ..C~ - - - - _ I-I ~ ~ ~ --i ~ I--- -I ~ ' ~ Suite 530 I-"' - - - - ~ , , ; , ~ - - 4 Charlotte, NC 28203 C 28203
- -tTt-TI - - f ( III- i ~r- _ - _ I I- Phone: go4.52g.65oo I I ! - - 529.6500
~ 9 • ; ~ ~ ; , _ ; , CU -OFF TRENCH Faa: go¢.5zz.o882 _ - = fly-~~~-?li ~ EXCHANGE AND BACKFlLL 2.o882
( W/ COMPACTED SOIL)
\ \ '~~'Y i~V'. \ \ ' Y 4 4 ~ J LAND DEVELOPMENT DESIGN SERVICES I SERVICES

~ , / \ r.'. "
~ ~ y. v GENERAL N oTES. ;.y~~ Ali} :v~ , f> A NOTE . WATER Q S UALITY BI~ISIN ON TR C S U N CTIO
\ ~l' f WATER Q AUTY IN INF U BIP~S RMATI N 0 0
~ ~ • ` ° 1. AS BUILT DRAWINGS TO BE PI V A , r Y . y:~ x ~ \ ~ti r , t,, ra~ { PURPOSES PRIOR TO RELEASE ,WINGS TO BE PROVIDED TO TURNBULL SIGMON DESIGN FOR CMS DOCUMENTATION BASIN: BASIN 1 - SPECIFl Tl CA DNS. IOR TO RELEASE OF CONTRACTOR RETAINAGE. B SIN TT
X . ~ Y`~:~. N~„ ~ ~ 2. POND MAINTENANCE TO BE A! A. EARTHWORK A BO OM ELEVATION: 720 MSL DANCE TO BE AS INDICATED 1N THE NCDENR STORMWATER BEST MANAGEMENT PERMANENT POOL ELEVATION: 726 MSL
\ ~ - 'X . ' . ? ~ o \ ~ PRACTICES DESIGN GUIDELINE: 'SIGN GUIDELINES. 1. THE FOUNDATION AREA SHALL BE CLEARED OF TREES, LOGS, STUMPS, ROOTS, TEMP Y P A
\ ~ :ri~' ~ : ; , \ 1 3. CONTRACTOR TO SUBMITS A BOULDERS, SOD AND UNSUITABLE SOIL. IF NEEDED TO ESTABLISH VEGETAl10N THE ORAR OOL ELEV T10N: 728.86 MSL ' PERMANENT POOL SURFACE AR : ~ , TO SUBMIT SEALED SHOP DRAWINGS OF OUTLET STRUCTURE DEVICE AND ALL TOPSOIL SHALL BE STOCKPILED AND SPREAD ON THE COMPLETED DAM AND SPILLWAYS. EA 22,264 SF r
\ ' % ~ ~ \ , \ APPURTENANCES FOR APPROV ES FOR APPROVAL PRIOR TO CONSTRUCTION. THE FOUNDATION AREA SHALL BE THOROUGHLY SCARIFIED BEF R P DRAINAGE AREA: 46.05 AC 0 E LACEMENT OF
THE FILL MATERIAL. IMPERVIOUS AREA: 19.34 AC 4291 y
. , yf ~ ~ PIANT HED ~ . SC ULE. ' : . ~ ATER UAL11Y I ~ .y 1 • PERMANENT POOL VOLUME: 1.69 AC-FT ~EDULE. 2. EXISTING STREAM CHANNELS IN THE FOUNDATION AREA SHALL BE SLOPED NO STEEPER
BAS THAN A RAT10 OF ONE HORIZONTAL TO ONE VERTICAL. THEY SHALL BE DEPEENED AND TEMPORARY POOL VOLUME: 1.64 AC-FT
~ > ~ , . - ? : ~ ~ BASIN BOTANICAL NAME C WIDENED AS NECESSARY TO REMOVE ALL STONES, GRAVEL, SAND, STUMPS, ROOTS, L NAME COMMON NAME SIZE SPACING AND OTHER OBJECTIONABLE MATERIAL AND TO ACCOMMODATE COMP C N FOREBAY VOLUME: 0.36 AC-FT 0.21 A 110 EQUIPMENT.
. , ~ :'u ~ . i ~ o ~ ~ I I: / 1 pontederia cordato F cordato PICKERELWEED 1/3 QT, 2/3 PEAT POT 2.5' O.C. FOUNDATION AREAS SHALL BE KEPT FREE OF STANDING WATER WHEN FILL IS PLACED SA/DA USED: 1,0g
~ ~ x } / . 1 soururus cemuus ON THEM. THE BORROW AREAS SHALL BE CLEARED OF DIAMETER OF ORIFICE: 4,25" CHARLESTON • CHARLOTTE cemuus LIZAROTAIL 1/3 QT, 2/3 PLUGS 2 O.C. STUMPS, ROOTS AND ZLOTTE
~ ~ N•~.. s ~ \ ; , ~ . . : i. I ~ ~ ' 1 sci us validus SOF" . ;ti I X rP UNSUITABLE SOIL. THE WATER QUALITY BASIN SHALL BE CLEARED AND ALL STUMPS validus SOFT STEM BULRUSH 1/3 QT, 2/3 PLUGS 3' O.C. REMOVED.
` ~
Y, • 3. BEFORE FILLING OPERATIONS BEGIN, THE SOILS ENGINEER WILL TAKE REPRESENTATIVE LS3P ASSOCIATES LTD. OUTLET T RM D SAMPLES 0 RAINAGE DE I N DATA e'' F EACH PROPOSED FILL MATERIAL AND TEST THEM TO DETERMINE THE 112 SOUTH TRYON LTD.
\ .f . ~ . . ~.~-~,,y ~ WATER Q l UAUTY ~U/IL.ITY COMPACTION AND CLASSIFlCATION CHARACTERISTICS (PROCTOR TEST). ONLY THOSE UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM LENGTH SIZE SLOPE LEGEND/P
vv i ~ r~, ~ ~ v V 1~ LANTINGe MATERIALS AS APPROVED BY THE SOILS ENGINEER WILL BE USED AS FILL ON THE DAM. STRUCTURE STRUCTURE INVERT INVERT (FT) (IN) (FT/FT) CHARLOTTE, NC 28284 28284
' • '~~i1'>p ; x ~ SYMBOL DESCRIPTION DESCRIP110N SYMBQL DESCRIPTION GENERALLY SM OR SC CLASSIFlCATION SOILS WILL BE ACCEPTABLE. COMPACTED TH.. 704.333.6686 FAX [phone] EARTH FlLLS SHALL BE CONSTRUCTED TO THE ELEVATIONS, LINES, GRADES AND CROSS 0S~127 HW~128 719.80 719.37 43 54 0.0100 HTiPJ/WVYWLS~' COM '04.3322120
f r~i GE 00 PLUNGE POOL/ SUBMERGED AND PLANTED SECTIONS INDICATED ON THE PLANS. 1 ALL PIPET u?nnuu
II / ?y~ ~ x;><,~;x', is A . ~ APRON SPILT ,~,YU, # 0 BE CLASS III RCP, UNLESS NOTED OTHERWISE. `~~qu prr4 APRON/SPILLWAY ' LITTORAL SHELF ~~i
1 ti . : A ~ I ~ : ~ ,~~>;;Yai,Y;~ 4. AFTER STRIPPING OF FOUNDATIONS AND REMOVAL OF WEAK OR UNSUITABLE MATERIALS 0~ ~R ~~i r, , ~ ..oee ~ HAS BEEN COMPLETED, AND BEFORE START OF MATERIAL PLACEMENT, COMPACTED ~
I ~ ~ r~~;~l:h, ~ : ~l: ~ i>~ \ ~ ' ' ~ EARTH SHALL BE USED T De°°° ~SS~ ~ ; , ~ 0 FILL ALL STUMP HOLES, MINOR EXCAVATIONS AND ~ OF 0 0
~ iI ~ ~ ! \ ~ I: ~ i. 1 WATER ELEVJ ,1 / r f ~ ~ WATER ELEVAl10N ! / ; / / MAINTENANCE ACCESS DEPRESSIONS FOR CAVITIES INSIDE THE EARTH FILL LIMITS. 0.5 FT. 6,0 0.5 FT. a a a i ~ / i DRIVE , Q °
5. FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF NOT MORE THAN 9 LOOSE DEPTH. ? e 0 8 ~ °
III' ',:A~',la,; ~ -`x ~ . I * SUBMERGED ,,x ~ O IJTTORAL SHELF AS SOON AS FEASIBLE AFTER STARTING C0NSTRUC110N OF A FILL. THE CENTRAL 4 o• a LITTORAL SHELF TO BE PLANTED WITH A MIXTURE OF PORTION THEROF SHALL BE BUILT AND MAINTAINED SLIGHTLY HI " °~N F-~°
I l ~'Y ~ ' x PICKERELWEED (pontederio cord) I GHER THAN THE SIDES ° GJNE ° ~v 2-1/2 EDGE ''/i, °000aoeaeeoo°°° pontederio cordato), LIZARD TAIL (saururus cemuus), TO ALLOW FREE DRAINAGE TO THE SIDE SLOPES.
11 ` ,a. r..' 1 ~ AND SOFT STEM BULRUSH sci ~ ~~x:1tit~ `r>•n'.~y I I i j r FOR SIZE AND SPACING REQUIRI BULRUSH sci us validus , SEE PLANTING SCHEDULE 4i~l~I ti`p ~ OS { rP ) / ~ 2 >PACING REQUIRMENTS. q~rir C • p`~~~
~ ,s ~:.r x l 1 6. EACH LAYER OF FILL SHALL BE COMPACTED BY ROLLING WITH C0MPAC110N EQUIPMENT rhunuuma~ WHICH IS BEST SUITED FOR THE TYPES OF SOIL ENCOUNTERED. FILL ADJACENT TO o HINGE(S) twuur
1 ~ ~ , ~ % u,~:~>~,~ 1 1 ~ PIPE CONDUIT AND ANIISEEP COLLARS SHALL BE COMPACTED BY HAND. EACH LAYER ~ rrryri~,'
OF FILL SHALL BE COMPACTED TO NOT LESS THAN 95% MAXIMUM DRY DENSITY p~` ~1 ~Rp ~~i, (STANDARD PROCTOR) AT OPTIMUM MOISTURE CONTENT. WETTING OR DRYING OF THE 0~°°° NGI •e,
' ~y .y~,y~, /v';;; ,y aylyl~ ~ x 1 ~ ~ / Y%~' / MATERIAL AND MANIPULATION TO SECURE UNIFORM MOISTURE CONTENT THROUGHOUT ; ~ NFF°o
EACH LAYER SHALL BE RE UIRED. DENSITY S = ~ Q TE TS WILL BE PERFORMED AT A _ r~ yo 's
~ I / I ! FREQUENCY AS SPECIFIED BY THE SOILS ENGINEER. AS A MINIMUM, TESTS WILL BE 1 :~C-ZZ35": A PERFORMED ON EVERY THIRD LIFT OR EVERY 1000 CUBIC YARDS WHICHEVER COMES ~ ~ "s :N ~e Z
I ~ r I ~ I . r ~ FIRST. ALSO DENSITY TEST WILL BE PERFORMED WHENEVER FILL MATERIAL / ~ ~ ~ G o~ ~
\ I I I ~ I-- / HINGE "°`~d~ ~ CHARACTERISTICS CHANGE. ~ / ~ y Otv
\ I ,a t , x I I ALUMINUM GRATING AND HATCH 1/8" STEEL \ B. OUTLET DEVICE TO BE DESIGNED AND CER11FlE0 \ ANGLE PLATE '~~i <</S I GMO~
E v v _ I l ~ I r 1 ~q4 ,~~p A 1. OUTLET DEVICE COMPONENTS ARE TO FABRICATED AS SHOWN ON THE PLANS. BY MANUFACTURER. ~ ~ prrrumiu+n~
~ S~ Al \ \ ~ pry ',t.,;~•.,~r~•~~ ti:~%~~~. x 1 CONTRACTOR TO SUBMIT . ~ ~ ~aanuuuuvr, SHOP DRAWINGS TO ENGINEER I ryi0
2. CONTRACTOR TO SUBMIT DESIGNED SHOP DRAWINGS TO THE CIVIL ENGINEER FOR FOR APPROVAL PRIOR TO 2 GRATE CAR /i~, ~
\ ~ ~ . c'' .r \ I ~ I 1 I ~ 1 { l m APPROVAL PRIOR TO CONSTRUCTION TO THE OUTLET DEVICE. SHOP DRAWINGS SHOULD FABRICATION " ~ ~ ~ 6 STAINLESS STEEL • : , / 0 y INCLUDE PRECAST BOX DESIGN, TRACH RACK, GRATED COVER, ALUMINUM STEPS, AND ~ , p~tp e , s
. e9 , ALL DRAIN/ORIFCE PIPING REQUIRED. ANCHOR BOLT. EPOXY ~ • • c IN PLACE ~ •d ~ °
11 \ ~ ~ ~ • ';~r: \ _ iii 1 1 V A ~ 1 L iii C. CONCRETE = s° C-157 =
o °Q= 1. ALL CONCRETE SHALL CONFORM TO THE STANDARD SPECIFICATIONS FOR READY MIXED o Q
1 \ ~ ~ t ~ ~ 1/ \ 1 \ VA ~ I : f PLAN CONCRETE, ASTM C 94. AN AIR ENTRAINING ADMIXTURE SHALL BE ADDED. THE ~ ~G e,°° ~,~°°o° , ° d~ ~ . CONCRETE SHALL BE PROPORTIONED TO MEET THE FOLLOIMNG REQUIREMENTS: eeeeeaa,a°° ~G
~ \ ~ x ~ / V v r a;;,.~ A / / E ~
1 ~ \ ~ \ ~ / ~~~;:~~~i~~rr< I V/ ~ \ 1 V ~ / / V \ ~~~ii S ~pN D COMPRESSIVE STRENGTH: MINIMUM 3600 PSI ~rirUrrnwunutt~~~,
u~ \ \ \ \ - ~b I ~i \ \ FES FES WATER-CEMENT RATIO. 0.40 - 0.50 7.0 FT. MINIMUM 3", MAXIMUM 5" MEMBERS OF T1-E AMERICAN WSTITUTE OF ARCi1TECTS ,rc. SLUMP: F ARCHITECTS
• • - :w.~~lk,.~ AIR CONTENT: MINIMUM 5%a MAXIMUM 8%
\ ~ / \ ry n. ~ M ` COPYRIGHT 2003 ALL RIGHTS RESERVED COARSE AGGREGATE: 1" - 1 1 2" • ' ' ' ~ ' 18" ALUMINUM ~ ~ ~,r`i~-~ - ~ ~ ~ . ~ ~;x~., , RESERVED
A ~ \ ~ ~ ® 1 1 / \ r. , I~ ~ V X \ a;~ m 1 ACCESS LADDER PRBVTED OR ELECTRONIC DRAWNCS AND r.- , ~ M1 ~.,t~ ~ D. GRASSING ~ ~~i: , - ~ . ~ 6" GRAVEL VING'S AND
~ ~ ~ I ~ ~ \ I ~ \ V A \ 18" RIPRAP " , • 6"' DOCUMENTATION MAY NOT BE REPRODUCE 18 RIPRAP FlLTER FABRIC 1. GRASS ALL AREAS DISTURBED BY CONSTRUCTION PER SPECIFICATION OF EROSION ~ Y ~ . ° • EPRODUCED
\ \ \ . \ \ 1 \ ~ COMPACTED SECTION A-A ' • CONTROL C0401. TRASH RACK • 4-1 2" 4-1 2" N ANY FORM WITHOUT WRITTBV PERMISSION .OMPACTED o z + / PERMISSION
1 \ \ ~ ~ ( x~ \ \ EARTH :ARTH E. PLANTING ~ FROM LS3P ASSOCIATES LTD.
r.-' \ ~ ~ . ~ i l C \ \ 1. WETLAND PLANTINGS SHALL BE ADDED AS REQUIRED BY STORMWATER BEST ~
T_ET A B C D RIPRAP CLASS MANAGEMENT PRACTICES. PLANTING SHALL BE BASED ON AVAILABILITY OF PLANTS 7.0 FT : • ~ "
_ F ~ ~ v ~ x / ~ z~aa ~n~ on' a~ n LISTED IN TABLE 2.2 OF NCDENR BEST MANAGEMENT PRACTICES DESIGN GUIDELINES. ; 4.25 DIAMETER 63" 54" RCP 54"
' RG V{JItJI\S:
~ \ ? ; ' (trr FES#55 20' 3#55 20 15' 1 14' 1 9' 2 t _ _ _ _ _ _ _ _ 1 01/19/05 JKK REV. SHEET NUMBERS AND AND
1 MAVNTENANCE PLAN: ASSOCIATED ITEMS OPERATION AND
-.77 7 1 " 2 03/08/05 &K REV. PER ENGINEERING . 01 . 4=1 2 L4-1/2- COMMENTS A. INSPECT MONTHLY. OR AFTER EVERY RUNOFF-PRODUCING RAINFALL EVENT. 6 DIAMETER
WATER QUALITY BASIN# I PLAN PLUNGE POC WHICHEVER COMES FIRST BASIN DRAIN , iE POOL 6
0 10 20 40 60 80 c? 1. REMOVE DEBRIS FROM THE TRASH RACK.
2. CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS. IF A PUMP IS USED AS A
DRAW DOWN MECHANISM, CHECK FOR PUMP OPERATION.
3. CHECK THE POND SIDE SLOPES, REMOVE TRASH, REPAIR ERODED AREAS'BEFORE THE NEXT RAINFALL EVENT. 6" GATE VALVE
4. IF THE POND IS OPERATED WITH A VEGETATED FILTER, CHECK THE FILTER FOR W/ WHEEL TURN
0 SEDIMENT ACCUMULATION, EROSION AND PROPER ORIENTATION OF THE FLOW EXTENDED TO TOP
4 HARDWARE CLOTH ACROSS ALL OUTLET SOURCE POINT FLOW I OPENINGS, REFER TO DETAIL 'A' FOR SPREADER MECHANISM. REPAIR AS, NECESSARY. OF STRUCTURE ;E POINT FLOW IN
ADDITIONAL INFORMATION. CONTRACTOR A B. QUARTERLY OUTLET STRUCTURE PLAN
TO REMOVE HARDWARE CLOTH, RIPRAP TIE WIRE MESH/HARDWARE CLOTH TO REBAR. 90 FT. AND WASHED STONE AFTER SITE HAS ATTACH REBAR TO CONCRETE RISERS USING 1. INSPECT THE COLLECTION SYSTEM (IE: CATCH BASINS, PIPING, GRASSED SWALES FOR PROPER FUNCTIONING. CLEAR ACCUMULATED TRASH FROM BASIN GRATES,
BEEN STABILIZED. COORDINATE WITH 0-4 1/4" WEDGE ANCHORS. USE WS-1422 ANCHORS , y~~ ~ , r., ~ ~ BASIN BOTTOMS, AND CHECK PIPING FOR OBSTRUCTIONS.
r NCDENR LOCAL INSPECTOR. BY REDHEAD OR EQUIVALENT y y sc LL- 2. CHECK POND INLET PIPES FOR UNDERCUTTING, REPLACE RIPRAP, AND REPAIR
G7 '.ly d• A•.i: B f P- fw. _.z.,~ x r r kx:, ;j,,, i'• i r t 5 WASHED STONE ° a 7: c z •f T x 9 s ,.t A. G 777111 s i t ti B BROKEN PIPES.
3. RESEED GRASSED SWALES IN / CLUDING THE VEGETATED FILTER IF APPLICABLE.
CLASS I RIPRAP ° 4 TWICE A YEAR AS NECESSARY. REPAIR ERODED AREAS IMMEDIATELY. 5"X5"X3/8" i y , ; , . s , , STAINLESS STEEL / \ V
2"X4" CLEAN OUT STAKE 1 6 0 > ANGLE \ PRO 03055 J C. EVERY SIX MONTHS \ Y
CLEAN OUT BASIN WHEN 1. REMOVE ACCUMULATED SEDIMENT FROM THE BOTTOM OF THE OUTLET STRUCTURE. / I DATE: 12/20/04
SEDIMENT REACHES TOP OF STAKE. REFER TO A h ~ ry 2. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE POND. IF DEPTH IS REDUCED DRAWN BY. STC
EROSION CONTROL PLAN TO 757 OF ORIGINAL DESIGN DEPTH, SEDIMENT WILL BE REMOVED TO AT LEAST 1.0' /
FOR SEDIMENT STORAGE - " ELEVATION. O Q o ° ORIGINAL DESIGN DEPTH, TYPICAL / CHECKED BY: STC
D. GENERAL
12 A 1. MOW THE SIDE SLOPES, NOT INCLUDING NORMALLY SUBMERGED VEGETATED SHELF, / ACCORDING TO THE SEASON. MAXIMUM GRASS HEIGHT WILL BE 6". 2. CATTAILS, AND OTHER INDIGENOUS WETLAND PLANTS, ARE ENCOURAGED ALONG
_ IN C-4 DISSIPATED FLOW OUT
PLAN PLAN THE POND PERIMETER. HOWEVER, THEY MUST BE REMOVED WHEN THEY COVER
THE ENTIRE SURFACE AREA OF THE POND. /
I I #4 REBA."~?''':•:<.::, 3. THE ORIFICE IS DESIGNED TO DRAW DOWN THE POND IN 2-5 DAYS. IF DRAW DOWN IS NOT ACCOMPLI ~ STORMWATER SHED IN THAT TIME, THE SYSTEM MAY BE CLOGGED. THE SOURCE
g0' OF CLOGGING MUST BE FOUND AND ELIMINATED. 6" STAINLESS STEEL MANACEMENT
`~i"••'~`>':''~ WIRE MESH COMPACTED 18 RIPRAP EARTH 6" GRAVEL 'cl 4. ALL COMPONENTS OF THE DETENTION POND SYSTEM MUST BE KEPT IN GOOD ANCHOR BOLT. EPOXY
HARDWARE CLOTH ACROSS ALL OUTLET x Q N WORKING ORDER. IN PLACE BASIN
OPENINGS. REFER TO DETAIL 'A' FOR ^ a : SECTION A-A FILTER FABRIC ADDITIONAL INFORMATION. CONTRACTOR -4 - 5. UPON COMPLETION OF THE POND AND PROJECT DEVELOPMENT, CHARLOITE- r MECK
TO REMOVE HARDWARE CLOTH, RIPRAP ; . ' a a: 4, , °a. • ' ' ' j LENBURG SCHOOLS SYSTEM WILL BE THE RESONSIBLE PARTY FOR t OPERATION AND MAINTENANCE.
AND WASHED STONE AFTER SITE HAS : • DETAIL 'A' T yl. 7 IPPA
BEEN STABILIZED. COORDINATE WITH COMPACTED NCDENR LOCAL INSPECTOR.
H EARTH SECTION SECTION B-B ® 1. CONTRACTOR IS FULLY RESPONSIBLE FOR CONTACTING APPROPRIATE
PARTIES AND ASSURING THAT EXISTING UTILITIES ARE LOCATED PRIOR TO BEGINNING CONSTRUCTION. CALL NC ONE
l 0 LET STRUCTURE EROSION CONTROL MEE/11SURES LEVEL SPREADER DET/YL CALL CENTER C0801
2. CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES, USING FLAG BEFORE YOU DIG MEN, ETC. AS NECESSARY TO ENSURE THE SAFETY OF THE PUBLIC. STOP STAINLESS STEEL
fl 3. ALL PAVEMENT CUTS, ASPHALT OR CONCRETE, ARE TO BE PLACED 1'80ID UTI TY ANGLE CLIPS AVOID unutY TYPICAL ACCORDING TO STANDARDS OF THE NORTH CAROLINA DEPARTMENT OF DAMAGE
.1_ TRANSPORTATION AND CMU SPECIFICATIONS,
4. SHORING WILL BE ACCORDING TO OSHA TRENCHING STANDARDS PART OUTLET STRUCTURE ANCHOR SOLUTIONS THROUGH LISTENINC
1926, SUBPART P, OR AS AMENDED. FENINC
SERVICE BY DESIGN
2 3
4 5 6 100% CONSTRUCTION DOCUMENTS TENTS

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- - ~ - - - _ i ~ ~ _ _ ' f StCC3rt1 2 ImpOTtarit d ,0.19aC ~ 'S ; " ~ _ ~~„"n.-.. Turnbull Sigmon Design iooi Morehead Square Dr. r.
' . ~ A ~ ~ ~ ~ ~ u t , ' ~ i 2 ~ ~t•'"yY ~ ~ ~ ~ ~ , - . Suite 530
- i . ;1j 1 ~ harlotte, NC 28203 ' . I ~ ea ~ ~ ~ : , t ~ _ , 4.529 5
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- - ~ , . , , Im act Area . • - ' REQUTAED SDRFACE AREA: 21,780 SF ~ ~ ~ _ _
~ ~i!. i , , _ , , ~ ~ ; a. ° RFACE AREA: 22,264 SF ~ ~ P . ~ i ~ _ ,1,, ~ ~
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~ • r ' / ~ ~ V , ~ ~ 'j , .x ~ ; c ~ v - _~s, x ~ Ii7 ~ ` ~ 112 SOUTH TRYON
, ~ ~ - :,;_a, ° ~ ~ - .A ~ ~h~ 1 ~ ~I I.; ~ ~I ~ CHARLOTTE, NC 28284 4
. / i i _ . ~ :ar- , b ~ ~ ~ ~ i TEL. [phone] FAX 704,332.2120 I ~ , - ~ a ~ ; 0
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1 ~ ~ 1 ~ - \ ~ i 1 ~ ; ~ Wetlands Area ~ I ~ ~ _ , ~ ~ ~ `
6 ~ ~ ~ r \ 6.:: _ ' . ' , ~ ~ / COPYRIGHT 2003 ALL RIGHTS RESERVED 6 - ' 0.26 ac _ 7 . ~ I _ _ D
r F . , ~ ~ ~ ~ - - ~ PRINTED OR ELECTRONIC DRAWINGS AND f ID
ROP E P \ I )P E , ~ DOCUMENTATION MAY NOT BE REPRODUCED ~ _ i , f= _ / ~ D
~ - j - ti ' ~ I ~ ~ ~ ~ , ,1 - t r - ; ~ . ~ \ PME ~ . ; _ . . , ,1. ~ ~ _ , . - _ _ IiliOUT WRITTEN PERMISSION , . , - , ~ . IN ANY FORM W )N
~ i ~ ~ ~ , ~ _ r ~ _ , _ _ , ~ ' ~ - ~ ~ ~ FROM LS3P ASSOCIATES LTD.
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~ ~ i / .Jr ~ i' ~ ~ ~ - .J , 4 F ~ ~ _ J ~ • 1 - _ _ ';j~~ _ " ' ~ r ? ex • ' REVISIONS , . ' ~ ~ a I~ - QZ 1, ~ , ~ _ ,
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PROJECT: 03055
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DATE: 12/09/04 ,
DRAWN BY:
CHECKED BY:
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SOLUTIONS THROUGH LISTENING
0 100 200 400 600 800 SERVICE BY DESIGN
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1 2 4 5

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• ~ 4 . NOTE: ,
1. CONTRACTOR TO ENSURE THAT OUTLET BO) iAT OUTLET BOX IS SET LEVEL AND FLUSH WITH
' SURFACE OF ~ BASE FOOTING TO PROVIDE OF ' - ~ - .,m SECOND BATCH OF CONCRETE. GROUT IF ~ ' TO PROVIDE UNIFORM BEARING PRIOR TO PLACING TE. GROUT IF NECESSARY. ALL ORIFICE AND PIPE
~ ~ - . ° OPENINGS INTO THE OUTLET STRUCTURE SH ' STRUCTURE SHALL BE SEALED LEAK TIGHT.
M ! ~ USE "LINKSEAL" MECHANICAL SEALS FOR AI .L SEALS FOR ALL PIPES 24" AND SMALLER. TOP OF DAM ELEV: 631.00
: 2. REFER TO ~ Q DETAIL ~7 THIS SHEET FOR SRO, • - _ ~ WITH THE OUTLET STRUCTURE DEVICE. iHEET FOR EROSION CONTROL MEASURES ASSOCIATED i iE DEVICE.-~ ~ , i- I i---.-; ,
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GRATED COVER ~ Q ' SEE DETAIL ~2 I i ~
1 ~ . , ~ ~ v ~ ALUMINUM STEPS - - 1 T-4 , 1----E i f-~ € E-{ i !-i i I. TOP OF STRUCTURE ELEV: 728.86 - - - 1 r - - 12 O.C., TYPICAL - - .mod
_ _ E CY PILLWAY ~ Fi . . 0 - - - - - 1---I - -w - ~ - I- ~ -I i-
1 9 T.. - _ p T 0 D 4 _ --i _ - o -l F-
v . N~, _ _ - I---i - - - I I-i ' 6 - PERMANENT POOL ELEVAl10N ~ 6-I -_i - - _ _ - o : ~ ~ I I-, E
G IN P A ~ 4Q - i ELEV: 726.00 0 = 9 I- 1- I- _ -I ~~E I I.._. _ , - - P f I I-
I _ _ _ ~
t E t t - 1 . i V A, , , 4 . i i---~ l i- -_.I - ~ - I - -i TRASH RACK ....-'i 1= _ - h~.. I - -
r t. y . , ~ I ~ v ~ i I RAMP RAMP ~ ~ ~a~.. ,~,.a RAMP ' 3.0 DIAMETER DIP k CL ELEV: 724.50 o I-i I - - i_.__ WALL SLEE ._....I - - -
r _ ` A,'. ` ' ALUMINUM STEPS
ti~" TURNING ROD GUIDERAIL o _ - -
F'Ri•~ , 12 O.C., TYPICAL ~ E - SUPPORTS AS NEC ' I- I I - - _ ESSARY - - -
' 'P , - , . ~m PRECAST T X T VAULT 1 1 f 6" DIAM. GATE VA - - - - LVE - ~ -E I- - -
, NSIONS ARE TO OUTS IDS 1 ~ TO DRAIN POND TURNIN - i i i-3 ~ -i . ( I°°" ; i - -1~ --i _
, CONTRACTOR TO SUBMIT ,Y ~ _ , . ' ~ SEALED SHOP DRAWINGS ROD TO BE EXTENDED TO ~I ~ - - I ; N~- TOP OF STRU ~ ~ ~ s-
B , ; , • v, , „,M , . - , FOR APPROVAL PRIOR • r • . CTURE WITH 6 ~ HANDWHEEL FOR OPERATION o ~ I ~i I _ I
~ ~ F ~ ~ : S 5 TO CONSTRUCTION ~ ^ . • . ; , , . ; , 38 „ SOLID FlLL 6 DIP POND DRAIN , : ° I - - - - - - - - - - - - - - - - - - - - -~i Charlotte-Mecklenburg Schools
~ 4 ~r7 .0 ~ GROUT CONCRETE ~ . ~ N / WITH TRASH RACK 1 i - - - ` - - - - - - k [I 11 I~ "
a , ° 1 i 54 RCP OUTLET PIPE ~ ~ - I BOTTOM OF POND ~ ~ 0 1.00
- 1 :1RAMP NGE OL A 0 12:1 AMP ELEV: 720.00 1 i ~ SLOPE ~ ~ ~ ~ NV• 719.801 I I
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. • C_ ~ DDITI AL IN RMA _ , o a
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" C AN OU ST , , . S ~ LE AK ? A i a E-e ~ i= - + i- _ ~ ; - - { i--(, i---dE I p---- - - - I ; poor Morehead S uare Dr. ~ilEi~ieii f'`iP I -I t-,~i. i...1II- _.._.t 1- -Ii• - I 11 Suite o q
~ °ELEV: 723.00 E ~ X ~ i ~ ~ I~- A ~ ~ ~ ~ . . 4 I ~ ~ , , , + c , , ; o , , . ~ `~a , , I V Vi=a-.! ~ i _____r i - Y. - - ~ - - 53 I- i i f I ~ I ~ - - i - • ...-m~ 3.~ - I k -I i ~ ' • ~ - .S AN H R D A ~ - 1--- Charl ° i i i o i '-r 9 i [ ~ ~ { ~ I i I - 1 -L i~ - ~ I - ~ p.... Otte, NC 28203
. , r N 6. DIAMETER. FOREI3AY - ° ' • : 4.+•'." I I! I z I I - 9 FT. : ~ ! ~ ~ ~ ~ ( Phone: ryo4.529.6500 _ I ~ I s~ ~...-1 ~ I. ~_I ~ I-....e.l I I_.._,,, r i . , ,iii , , , I CUT-OFF TRENCH Faz. go4.522.o88z
Q1. . , , m ' • •DEWATERING DRAIN • , . . r, p . ~ ~ ;r E (EXCHANGE AND BACKFlLL
•'1NV. UJ: 721 00 a,,..: r • , - _ . ~ Q „ JNV. OUT. 7 5 „ . a , N + ~ d W/ COMPACTED SOIL)
4 . , r , LAND DEVELOPMENT DESIGN SERVICES
Y ti ~ y w R'« } . ,
w , ~ I a. - / 444 . N
„ ~ ~ e ~ S.: ~ ~
C ' W ~ GENERAL N NOTE . .
S • WA y is TERQU ALJTY B/~SIN , CON STR UCTION T , WATER Q , .:~*4' UAIJTY IN I BAS NF h ORMATION
' ~ ` ~ " . ` : . , rn _ 1. AS BUILT DRAWINGS TO BE PROVIDED TO TUF , . , • ~ , X ' ~ti~: , . • ` . ; . ~ i PURPOSES PRIOR TO RELEASE OF CONTRACT( 'ROVIDED TO TURNBULL SI GMON DESIGN FOR CMS DOCUMENTATION SPECIFI BASIN: CATION S. BASIN 1 t OF CONTRACTOR RETAINAGE.
• , A< EARTHWORK BASIN BOTTOM ELEVATION: 720 MSL
~ . r 2. POND MAINTENANCE TO BE AS INDICATED IN O 20 FT. • ~ . N , • FORE9AY_„ - (~X 'o t PRACTICES DESIGN GUIDELINES. S INDICATED IN THE NCDENR STORMWATER BEST MANAGEMENT PERMANENT POOL ELEVATION: 726 MSL 1. THE FOUNDATION AREA SHALL BE CLEARED OF TREES, LOGS, STUMPS, ROOTS,
fp, ,WEIR SECTION o; r':; ~ p 3. CONTRACT R y ~ s 0 TO SUBMIT SEALED SHOP DRAW MP BOULDERS, SOD AND UNSUITABLE SOIL, IF NEEDED TO ESTABLISH VEGETATION, THE ~ ORARY POOL ELEVATION: 728.86 MSL LED SHOP DRAWNGS OF OUTLET STRUCTURE DEVICE AND ALL TOPSOIL SHALL BE STOCKPILED AND SPREAD ON THE COMPLETED DAM AND SPILLWAYS. PERMANENT POOL SURFACE AREA: 23,600 SF ,
a m:r:. _ APPURTENANCES FOR APPROVAL PRIOR TO C ~ dAL PRIOR TO CONSTRUCTION. THE FOUNDATION AREA SHALL BE THOROUGHLY SCARIFIED BEFORE PLACEMENT OF DRAINAGE AREA:
46.05 AC THE FILL MATERIAL. IMPERVIOUS AREA:
WATER QUALITY Br~SIN ~ . . ; ~ PIANT SCHED ¢ , , w . , . 4. 20.05 AC 42x 2. EXISTING STREAM CHANNELS IN THE FOUNDATION AREA SHALL BE SLOPED NO STEEPER PERMANENT POOL VOLUME: 74,388 CU FT
ULE. • y „ u . 'A o ' , , _ ~ . THAN A RATIO OF ONE HORIZONTAL TO ONE VERTICAL. THEY SHALL BE DEPEENED AND TEMPORARY POOL VOLUME:
~ ,PERMANENT X o , . ~ . , • ~ _ ice:.,. BASIN BO TANICAL NAME COMMON NAME . , 75,500 CU FT :OMMON NAME SIZE SPACING WIDENED AS NECESSARY TO REMOVE ALL STONES, GRAVEL, SAND, STUMPS, ROOTS, FOREBAY VOLUME: 15,692 cu ft (0.21%
~4F ELEVAl1~N ~F 726 ~ ~ 1 ontederia cordata PICKERELWEED ~ , AND OTHER OBJECTIONABLE MATERIAL AND TO ACCOMMODATE COMPACTION EQUIPMENT. S PICKERELWEED 1/3 QT, 2/3 PEAT POT 2.5' O.C. FOUNDATION AREAS SHALL BE KEPT FREE OF STANDING WATER WHEN FILL IS PLACED A/DA USED: 1.16
.r ` ~ . , _ , ° " X 1 1 saururus cernuus LIZARDTAIL L y • LIZARDTAIL 1/3 QT, 2/3 PLUGS 2' O.C• ON THEM. THE BORROW AREAS SHALL BE CLEARED OF STUMPS, ROOTS AND DIAMETER OF ORIFICE: 3,p" CHARLESTON ~ CHARLOTTE
~ -"a N f ~ ~ „ ~ ' . ~ : ~ X ~ 1 scirpus validus SOFT STEM BULRUSI UNSUITABLE SOIL. THE WATER QUALITY BASIN SHALL BE CLEARED AND ALL STUMPS T STEM BULRUSH 1/3 QT, 2/3 PLUGS 3' O.C. REMOVED.
0 ~ ~t r - A_ . . 2 •Z ~ , ~ . , H
• , , • 4 f x , , 3. BEFORE FILLING OPERATIONS BEGIN, THE SOILS ENGINEER WILL TAKE REPRESENTAl1VE ~ m ~ LS3P ASSOCIATES LTD,
N 'x t. ' r ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ER QUALJIY SAMPLES OF EACH PROPOSED FILL MATERIAL AND C~V 1 LL I T TEST THEM T S ORM D 0 DETERMINE THE RAINAGE DE S GN DATA
LEGEND ~ ~ o ~ ~ . , LEGEND P~ ~~m COMPACTION AND CLASSIFICATION CHARACTERISTICS PROCTOR TEST. ONLY 112 SOUTH TRYON IJY V 1 I THOSE NG. c UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM LENGTH SIZE SLOPE MATERIALS AS APPROVED BY THE SOILS ENGINEER WILL BE USED AS FILL ON THE DAM. STRUCTURE STRUCTURE INVERT INVERT FT IN FT CHARLOTTE, NC 28284
is t ~ , y p ~ Z • ° : ~ X SYMBOL DESCRIPTION , l w s . a „ . SQL DESCRIPTION GENERALLY SM OR SC CLASSIFICATION SOILS WILL BE ACCEPTABLE. COMPACTED ( ) ( TEL [phone] FAX [phone]
, r' 1 ~ W . , , ~ ~ CLEAN OUT STAK); . , . N N ~ i .r~ "a ~.J G Q : ' '•E EV: 7 . ~ , . ~ f PLUNGE POOL EARTH FILLS SHALL BE CONSTRUCTED TO THE ELEVATIONS, LINES, GRADES AND CROSS OS~127 HW~128 719.80 719.37 43 54 0.0100 SECTIONS INDICATED ON THE PLANS. HTTPJ/WWWIS3P.COM
r' t o ~ .22.00..•. _ / 1 r N ~ , ` : ; . ' ; _ ° ; APRON/SPILLWAY )L/ SUBMERGED AND P CANTED (t) ALL PIPE TO BE CLASS III RCP, UNLESS NOTED OTHERWISE. ~puunuuq LWAY LITTORAL SHELF ~ q,
' . , 4. AFTER STRIPPING OF FOUNDATIONS AND REMOVAL OF WEAK OR UNSUITABLE MATE ~~~i RIALS SRO HAS BEEN COMPLETED, AND BEFORE START OF MATERIAL P ~
. • .h . , . - LACEMENT, COMPACTED (j EARTH SHALL BE USED TO FILL ALL STUMP HOLES, MINOR EXCAVATIONS AND ESS/
, . t ; i WATER ELEVATION r' i ~ ~ . AT10N MAINTENANCE ACCESS DEPRE 0.5 FT. OF ~ ' DRIVE SSIONS FOR CAVITIES INSIDE THE EARTH FILL LIMITS. 6.0 FT. 0.5 FT. °
K. , 34 ? ° :a ° 5. FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF NOT MORE THAN 9" ~ ~ `
, , I , ~ , . ° ' _ - . , : ' SUBMERGED LITTORAL SHELF TO BE PLANTS LOOSE DEPTH. O ~ 028 TO BE PLANTED WITH A MIXTURE OF AS SOON AS FEASIBLE AFTER STARTING CONSTRUC110N OF A FILL. THE CENTRAL ~ . I ~ °a
, , . ~ ~ BASIN OUTLE PICKERELWEED (pontederia cordata), LIZARD TA PORTION THEROF SHALL BE BUILT AND MAINTAINED SLIGHTLY HIGHER THAN THE SIDES " ^°Fi~ F,~;° ata), LIZARD TAIL (saururus cemuus , ° ) 2-1/2 EDGE IJ- °°,~INE,,•
~ d~ ~ ":.SEE DETAILS 1 AND ~3 AND SOFT STEM BULRUSH (scirpus validus), SEI ~ ~ TO ALLOW FREE DRAINAGE TO THE SIDE SLOPES. , pus validus), SEE PLANTING SCHEDULE E q
~ ~ '~'R, ~ " ` . , •~fOR ADDITIONA 1 ON` FOR SIZE AND SPACING REQUIRMENTS. . , n . ~ , t x MENTS. ~'~i ~ 6. EACH LAYER OF FILL SHALL BE COMPACTED BY ROLLING WITH COMPACTION EQUIPMENT ~~~n ~ • nannunun~
, ~ ' " ,r'` r , ~ ~ . WHICH IS BEST SUITED FOR THE TYPES OF SOIL ENCOUNTERED. FILL ADJACENT TO HINGE S PIPE CONDUIT AND ANTISEEP COLLARS SHALL BE COMPACTED BY HAND. EACH ° unuuwnp
r 1 , a, ~ ] .80 , OF FILL SHALL BE COMPAC LAYER r q~~4 TED TO NOT LESS THAN 95~ MAXIMUM DRY DENSITY `gyp ~ CAR/ ~i,,/
X ' a . 2 . . (STANDARD PROCTOR) AT OPTIMUM MOISTURE CONTENT. WETTING OR DRYING OF THE , i ' ` ,.e°sese°,0 MATERIAL AND MANIPULAl10N TO SECURE UNIFORM MOISTURE CONTENT THROUGHOUT ` " i ' a°~°~IGINF°°^°
a ~ ~ i '(a. ~ Y 111 ~ a° ~O I~ e i EACH LAYER SHALL BE REQUIRED. DENSITY TESTS WILL BE PERFORMED AT A
~ ~ 4: ~t ~ , , : X A FREQUENCY AS SPECIFIED BY THE SOILS ENGINEER. AS A MINIMUM TESTS WI ~ °W Z; .A. LL BE ~ _ _
~ ~ 3Q . PERFORMED ON EVERY THIRD LIFT OR EVERY 1000 CUBIC YARD ~ e~,C-ZZ35 = S WHICHEVER COMES ~ t \ : ~ ~e ~ FIRST. ALSO DENSITY TEST WILL BE PERFORMED WHENEVER FILL MATERIAL / / ~ - G a
o-., mw_ c , i P CHARACTERISTICS CHANGE. HINGE ~ ~ ~ ~ ° ~ . ~ /
` ~ 5 ',Q 1,00 SL9_.~ x l ~ , ` A ALUMINUM GRATING AND HATCH ~ 1 B` yB STEEL \ ~ ~ B. OUTLET DEVICE / / ~
E • ~ , ~ 3 N -SEEP COLLA ~ Q A r TO BE DESIGNED AND CERTIFIED ~ ANGLE PLATE \ '~i~ ~/S I GMO A 1. OUTLET DEVICE COMPONENTS ARE TO FABRICATED AS SHOWN ON TH BY MANUFACTURER, \ ~ ~~~np 1q~~~``
J ~ ~ ~ X ' < \ E PLANS. CONTRACTOR TO SUBMIT ~ gnnllnt
0 S „ 2. CONTRACTOR TO SUBMIT DESIGNED SHOP DRAWINGS TO THE CIVIL ENGINEER FOR SHOP DRAWINGS TO ENGINEER " ~ ``~d~U~t11~IUUUq~i~'~
~ , 12$ ~ , • APPROVAL PRIOR TO CONSTRUCTION TO THE OUTLET DEVICE. SH FOR APPROVAL PRIOR TO 2 GRATE CAR ~i,,/ r m OP DRAWINGS SHOULD ~ ~ I . ~ D , FABRICATION " ~ ^o°, INCLUDE PRECAST BOX DESIGN, TRACH RACK, GRAIED COVER, ALUMINUM STEPS, AND 6 STAINLESS STEEL / 0,° °°,ti
n' c~' ~ 2 Q . v 3 1937 ° '~Q . ALL DRAIN/ORIFICE PIPING REQUIRED. ANCHOR BOLT. EPOXY e9 ;
~ r .A,, 1 ~ W a Top ~ 8 0 d C• CONCRETE IN PLACE \ \ ~ ~ s ° s
Syr = -i ~ ° C-157 s 1. ALL CONCRETE SHALL CONFORM TO THE STANDARD SPECIFICATIONS FOR READY MIXED - ~ e Q
PU 4 S °q~, , PLAN CONCRETE ASTM C 94. AN AIR-ENTR I e 4 A NING ADMIXTURE SHALL BE ADDED. THE ~ o, °o
' E`' LASS II RIP PAP b1~1 ~ , CONCRETE SHALL BE PROPORTIONED TO MEET THE FOLLOWING REQUIREMENTS: ~ ~ ~ ~ s G
r_., / LENGTH: 15 T, nOH ~ COMPRESSIVE STRENGTH: MINIMUM 3600 PSI iii ~Gi4pN ~
/ r~ \ WIDTH: 9 - 20 f'T:, tea' ?Q ~3 .SO FES 'DEPTH: 24" WATER-CEMENT RA110: 0.40 - 0.50 7,0 FT, ~~~'~<<nnnlplq~a~~`~
x ~ \ CONTRACTOR TO PLACE A D~IONAL NU SLUMP: MINIMUM 3", MAXIMUM 5" MEMBERS OF TFE AMERICAN INSTITUTE OF ARCHITECTS AIR CONTENT: MINIMUM 5~a MAXIMUM 8~
~ ~ MAXIMUM SIZED STONE ON TOP OF , , ` ~ N , , \ E APRON, SIMILAR TO PATTERN ~,~,.z _ / COARSE AGGREGATE: 1" - 1 1 2" COPYRIGHT 2003 ALL RIGHTS RESERVED 18 ALUMINUM
Y.- INDICATED TO FUR ~ , ~ i ~ O A THER .INCREASE sb•°• X , ACCESS LADDER pRNTED OR ELECTRONC DRAWNCS AND
, ~ . ~ 'THE AFFECTS OF ENERGY DISSIPATION » \ 18 6" GRAVEL D. GRASSING 6" DOCUMENT 1. GRASS ALL AREAS DISTURBED BY CONSTRUCTION PER SPECIFICATION OF EROSION ~ V ~ ATION MAY NOT BE REPRODUC®
~ PRIOR TO ENTERING x+11 ~ RIPRAP LEVEL SPREADER. \ _ COMPACTED SEC110N A-A FILTER FABRIC CONTROL C0401. TRASH RA " _ CK b Z 4-1 2 4 1/2" N ANY FORM WITHOUT WRRTEN PERMISSION
90 LF 4EVEL SPREADER Y ~ X A " E RTH \ 'SEE DETAIL ~6 FOR ADDITIONAL E. PLANTING
y E A ~ INFORMATION. y-, ~ ; \ r Y OUTLET A B G _ - - - - - - - FROM LS3P ASSOCIATES LTD. 1. WETLAND PLANTINGS SHALL BE ADDED AS REQUIRED BY STORMWATER BEST
F )=NUpED LIMI TYPICAL ~ X B G D RIPRAP CLASS MANAGEMENT PRACTICES. PLANTING SHALL BE BASED ON AVAILABILITY OF PLANTS 7,0 FT• ~ "
, \ ~ ~ 4 _ FES#95 10' 20' 4' s \ LISTED IN TABLE 2.2 OF NCDENR BEST MANAGEMENT PRACTICES DESIGN GUIDELINES. 3.0 DIAMETER " " 20' 4' 14~ 2 63 54 RCP 54 INLET ORIFCE
m. \ . ~ FES ~ , \ #55 20' 15 , 4' ~ ~ , \ , ~ 15' 14' 9' 2 REVISIONS:
- - - - - - _ -I - 1 01 19 OS JKK REV. SHEET NUMB R
OPERAII - ~ ~ E S AND ON AND MAINTENANCE PIAN_ ,m.~
- w~win w urmo
WATER QUALITY BASIN# I PLAN I A. INSPECT MONTHLY, OR AFTER EVERY RUNOFF- PRODUCING RAINFALL EVENT, 2 03/08/05 JKK REV. PER ENGINEERING 6" DIAMETER 4-1 2" WHICHEVER COMES FIRST BASIN DRAIN L4-1 /2 COMMENTS «s 6n 3 05/13/05 JKK RELEASED FOR BIDDING
0 10 20 40 60 80 i 1. REMOVE DEBRIS FROM THE TRASH RACK.
4 06/30/05 BCM REVISED PER NCDENR 2. CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS. IF A PUMP IS USED AS A
DRAW DOWN MECHANISM, CHECK FOR PUMP OPERATION.
3. CHECK THE POND SIDE SLOPES, REMOVE TRASH REPAIR ERODED AREAS BEFORE
THE NEXT RAINFALL EVENT. 6" GATE VALVE 4, IF THE POND IS OPERATED WITH A VEGETATED FILTER, CHECK THE FILTER FOR W/ WHEEL TURN
l HARDWARE CLOTH ACROSS ALL OUTLET SEDIMENT ACCUMULATION, EROSION AND PROPER ORIENTATION OF THE FLOW EXTENDED TO TOP
OPENINGS. REFER TO DETAIL 'A' FOR SOURCE POINT FLOW IN SPREADER MECHANISM. REPAIR AS NECESSARY. OF STRUCTURE N
ADDITIONAL INFORMATION. CONTRACTOR A TO REMOVE HARDWARE CLOTH, RIPRAP TIE WIRE MESH/HARDWARE CLOTH TO REBAR. 90 FT B. QUARTERLY OUTLET STRUCTURE PLAN
AND WASHED STONE AFTER SITE HAS ATTACH REBAR TO CONCRETE RISERS USING 1. INSPECT THE COLLECTION SYSTEM (IE: CATCH BASINS, PIPING, GRASSED SWALES)
BEEN STABILIZED. COORDINATE WITH 1/4" WEDGE ANCHORS. USE WS-1422 ANCHORS NCDENR LOCAL INSPECTOR. BY REDHEAD OR EQUIVALENT FOR PROPER FUNCTIONING. CLEAR ACCUMULATED TRASH FROM BASIN GRATES,
o ~ BASIN BOTTOMS, AND CHECK PIPING FOR OBSTRUCTIONS. 2. CHECK POND INLET PIPES FOR UNDERCUTTING REPLACE RIPRAP AND REPAIR
#5B STONE o B N B BROKEN PIPES. , - - -
0 3. RESEED GRASSED SWALES, INCLUDING THE VEGETATED FILTER IF \ APPLICABLE. " n n
G CLASS I RIPRAP TWICE A YEAR AS NECESSARY. REPAIR ERODED AREAS IMMEDIATELY. 5 X5 X3/8 STAINLESS SS STEEL ~
2"X4" CLEAN OUT STAKE - C. EVERY SIX MONTHS ANGLE PROJECT: 03055
CLEAN OUT BASIN WHEN - o SEDIMENT REACHES TOP 1. REMOVE ACCUMULATED SEDIMENT FROM THE BOTTOM OF THE OUTLET STRUCTURE.
OF STAKE. REFER TO / I 1 DATE: 12/20/04 2. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE POND. IF DEPTH IS REDUCED /
EROSION CONTROL PLAN 0 FOR SEDIMENT STORAGE DRAWN BY: STC TO 75% OF ORIGINAL DESIGN DEPTH, SEDIMENT WILL BE REMOVED TO AT LEAST 1.0' /
ELEVATION. ti ` E c ° r> ORIGINAL DESIGN DEPTH. TYPICAL / CHECKED BY: STC
D. GENERAL
12' A t r ~ 1 1 1. MOW THE SIDE SLOPES, NOT INCLUDING NORMALLY SUBMERGED VEGETATED SHELF, /
o - IN N DISSIPATED FLOW OUT - OUT r )UT ACCORDING TO THE SEASON. MAXIMUM GRASS HEIGHT WILL BE 6".
_0 r. s o - PLAN 2. CATTAILS, AND OTHER INDIGENOUS WETLAND PLANTS, ARE ENCOURAGED ALONG THE POND PERIMETER. HOWEVER, THEY MUST BE REMOVED WHEN THEY COVER /
! \ / THE ENTIRE SURFACE AREA OF THE POND.
REBAR 3. THE ORIFICE IS DESIGNED TO DRAW DOWN THE POND IN 2-5 DAYS. IF DRAW DOWN
90' IS NOT ACCOMPLISHED IN THAT TIME, THE SYSTEM MAY BE CLOGGED. THE SOURCE 1 - - - - - STO RMWATER 10' OF CLOGGING MUST BE FOUND AND ELIMINATED.
18" RIPRAP WIRE MESH COMPACTED 6" STAINLESS STEEL MANAGEMENT 4. ALL COMPONENTS OF THE DETENTION POND SYSTEM MUST BE KEPT IN GOOD ANCHOR BOLT. EPOXY
HA EARTH 6" GRAVEL RDWARE CLOTH ACROSS ALL OUTLET iv OPENINGS. REFER TO DETAIL 'A' FOR r. SECTION A-A FILTER FABRIC WORKING ORDER. BASIN
ADDITIONAL INFORMATION. CONTRACTOR - = -.e - - - IN PLACE . UPON COMPLETION OF THE POND AND PROJECT DEVELOPMENT, CHARLOTTE-
TO REMOVE HARDWARE CLOTH, RIPRAP n i MECKLENBURG SCHOOLS SYSTEM WILL BE THE RESONSIBLE PARTY FOR OPERATION AND MAINTENANCE.
AND WASHED STONE AFTER SITE HAS . w y BDETAIL EEN STABILIZED. COORDINATE WITH
NCDENR LOCALINSPECTOR. COMPACTED 18" RIPRAP
EARTH SECTION B-B S GRAVEL ! 7 B-B 1. CONTRACTOR IS FULLY RESPONSIBLE FOR CONTACTING APPROPRIATE Li L~j FILTER FABRIC PARTIES AND ASSURING THAT EXISTING UTILITIES ARE LOCATED PRIOR TO
BEGINNING CONSTRUCTION. JBEF-632-4949 NC ONE
OUTLET STRUCTURE EROSION CONTROL MFA-'~URES LEVEL SPREADER DETNL CENTER -
2. CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES, USING FLAG YOU DIG
MEN, ETC. AS NECESSARY TO ENSURE THE SAFETY OF THE PUBLIC. OP STAINLESS STEE C0801 L
3, ALL PAVEMENT CUTS, ASPHALT OR CONCRETE, ARE TO BE PLACED ANGLE CLIPS
ACCORDING TO STANDARDS OF THE NORTH CAROLINA DEPARTMENT OF A DAM6A TM TYPICAL TRANSPORTATION AND CMU SPECIFICATIONS.
4. SHORING WILL BE ACCORDING TO OSHA TRENCHING STANDARDS PART OUTLET STRUCTURE ANCHOR SOLUTIONS THROUGH LISTENING 1926, SUBPART P, OR AS AMENDED.
~ 2 3 SERVICE BY DESIGN
4 5 6 CONSTRUCTION DOCUMENTS

w
v ~ ~ _ . NOTE, r ~ s •
- 1. CONTRACTOR TO ENSURE THAT OUTLET B0 ~ r HAT OUTLET BOX IS SET LEVEL AND FLUSH WITH
SURFACE OF BASE FOOTING TO PROVIDE UI t ~ - w SECOND BATCH OF CONCRETE. GROUT IF I TO PROVIDE UNIFORM BEARING PRIOR TO PLACING :TE. GROUT IF NECESSARY. ALL ORIFICE AND PIPE
_ " OPENINGS INTO THE OUTLET STRUCTURE SF f W ~ \ s ~ USE "LINKSEAL" MECHANICAL SEALS FOR A T STRUCTURE SHALL BE SEALED LEAK T1GHT. TOP OF DAM ELEV: 631.00
~ r tj? _ - - Rr. ~ th ~L SEALS FOR ALL PIPES 24" AND SMALLER. _ _ _ _
' ~ \ 2• REFER TO DETAIL ~7 THIS SHEET FOR ERO, 'y~ Q , WITH THE OUTLET STRUCTURE DEVICE. T FOR N NTROL MEASURES ASSOCIATED r--f ! i----d i +--E i i--1 SHEE EROSIO CO I s-_„•III~, ,-.,•.I I-,,,-,I i_._, RE DEVICE. I i---.. ...---I ~ ---I I I
, F ._~.r... _,.m._ ~~-i ! 1---~I I Imo---I I ~-I 1-~ 4 6~= I -
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F , O V .._~v _ i..."_ -•--I i 1-- - . I--• 1-I i-I - -
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~ GRATED COVER ~ ~ ~ ~ SEE DETAIL ~2 - i €---s ~ R--°-€ I {-°--1 ~ I_..-. 1 i.~,.l ; -...wC , 1---°I i
ro 0 _ _ _ - ~ TURE ELEV: 728.86 ALUMINUM STEPS - ~ ~ ~ ICI i~ I I_ ~ i~1 ~ TOP OF STRUC 12 O.C., TYPICAL - - i I~; ; I_~, C- ~ I- - , I- ~ ;
, o ~ I i ~.I ~ j-i E L.._6 ; '..~i i-I I t_.-... I I y fi ~k~ g { h j9 3--'.-! ~ I I-_--3 I (._.^r~ 1 ~--E ~ I-"I I I~':`i ; f--'^: i 1-°! 1~' ~ I^'.-~ I t i I-~ i--~ I I•...~~._.:.. 2 "'i h..~I I ~.-,I I {,..~......I I k-...~ ..~.I , -..-..t a h..~ !
: F< CY PILLWAY ti rg ~ V : x.75 ` w,,~.. ~o - O _.-.l I h. ! I L..e.....~.• ~ ),....,.....C ~ ~ ~ I {...~.I ~ Imo.-.. ~......R L....--.. a h ~ru1 I
' ~ ~ O,. , I. PERMANENT POOL ELEVATION o p - I--- - - -I ; 5 € { i-----w I~---; I ~I ; I~ - _ .I I I , III I~ I-- a ~ I
' 1 ~ 4 T ONE. ~ D . ~ " IN RP A ~ yw ~ Q ELEV: 726.00 _ , € - - . I - - I 1-~-~-i I 1-I : L.__, i {---III-•-~ I I I-_ I-I -.1 € o i^i, i - - - ICI E ` f ~ ?~l I I_; { ~ -I
€ I i! p{ i y l P ~ , III-I { - _._I ~ E i-i f°~--°•i 11°.°.1 I I--w°I I -I -
c , ° . ~ _ ti r~_..°... ro TRASH RACK 3.0 DIAMETER DIP... { i----j , _ - - - i, i- ___-I I i- -
~ , _ s i:' k , _ , _ k • ~ CL ELEV: 724.50 ~ WALL SLEEVE ~ i I I~ - - - ~i ~ ~I = - - - ~ - -
~ ' r RAMP RAMP ~ ' " ~ ~ RAMP , t ~ ~ . o , -
~ , ~ --f; ~ ALUMINUM STEPS , A ~ _ - - - - - I-- - - - ~ I.._._ - TURNING ROD GUIDERAIL o i = - = = - = = I-i - -
12" O.C., TYPICAL ~ ~ , • F _ ~ A N ESSARY I ! ! I I4 SUPPORTS S EC ~,R^' o ;;.4,1 y-.3 I f- - -....I I - -I I_^°'"", I R°'^'-I ..r._
F f~s:. „ - . • ~ ~ ~ ' PRECAST T X T VAULT 6 DIAM• GATE VALVE ~ € ~ I - o f l~---E ~ r--E I I- I - - - -
f ' i' S DIMENSIONS ARE TO OUTSIDE . ` • ( TO DRAIN POND, TURNING i l~s ~ - - ~I I - - = ~ '°""u'---•- - I , I - I - - - - - - Ni1-~
' CONTRACTOR TO SUBMIT r. ~ M e SEALED SHOP DRAWINGS ° ~ ROD TO BE EXTENDED TO o .i € I____s - I - ~ ~-4 ~ - - - - e~,& e TOP OF STRUCTURE WITH I- - I -7 1_ ~ - I- - _ _ _ ___.I R I I~
` ~ ~ ~ , FOR APPROVAL PRIOR - I____ I ~ 4.A HANDWHEEL FOR OPERATION o - I...._. - - € ; f I ~ I, _ ~ _ _ _ _ _ - - - - , 1..-.w Charlotte-Mecklenburg Schools
i B . " : ' , , . ~ ` - , TO CONSTRUCTION , ~ F ;;i ~ 6" DIP POND DRAIN r : o I ~..I ~ ~ I - - - - - - - - - - - - - - - - - - - -
S 5 ' l ` • ~ ~ , • , , _ ~ O ~ SOLID FILL ~ WITH TRASH RACK I I - - - o I ~ 54" RCP OUTLET PIPE I I
0 o GROUT/CONCRETE ' ~ , _ 2 N 1 ' I I I / i 0 1.OOR SLOP • BOTTOM OF POND 1 i E I I
- ~ ' S ~ ~ ELEV: 720.00 INV: 719.801 - } ~ ~ . , = - _ II
p 1 :1RAMP 12:1 AMP x NGE OL A 0 = = f.•. • , . , ' _ _ _'I ,II
N , - . DDITI . AL IN RMA . _ o , i
, ~ s ~ ! ~-I q a ° s \ I-I I- ~ , I k'°'.~.'S "-"°I E°-°~- s i. , ~ `i ~ i°-6' 1 1 " ; 'a' m t I _1 :.a a .k _ ~ 1~.1 I I-I 1 1-'_..; ~ -i ~.I .._,_:I I...-. i.._.- I p.~E i I.._....1 r. _ _ rtn~n -I - ---i { I"-°I p'-" ' i--°a 1~1"""- i ~ l.__e_
BARS ®1 i~ ` - - ~ ~ ~ a ~ { { - - Turnbull S' mon Desi n
, y h ; x . r . ~ _ . . i . ~ , ~ , ~ ~ , . I1 ~ ~ ~ ~ ~ ~ . II i ~l1iRl € - - - ~l ~ ~ '8 i; a - + • • r • ~ • • - • , • • ~ ! ( { I toot Morehead Square Dr. a i . 1 33 ° I ~ ~ _ . a i , I- - I'°°=- - -I i 1. ~ ~ , I ~ ~ ~ - j = ~ I 1 ' Suite 0
~ ~ , e t \ , , i - - - --i € 1---~d l I I- ; - _ I ;.._....I € i a ~-._..e s ' I_.. - - I ~ ! - - ~ 53 ' _ - -P I s-...._, 1 , , I -I , ~ 3 ;---°1 i I •--°-i ; I I-~ 1 ~r--~~ i i--~ I I~--°--i I C - - - - - I - Charlotte, NC 28203
CLEAN ,OUT STAKE ~ ` , ~ _ ' . , _ : X _ ! g- N ~ ~ ~ ` j ~ ~ ~ `ELEV: 723.00 , , , > S~5 - - - . # t ~ a i I P- - I-t I-I¢ h-....! 1 I - i._._.. ~___.I r ~ ` + 1 i 9- ~ AN H R D AL ~4_. ~ I-! € I - - - 1.,._._ Phone: ~o4.52g.65oo I I I---..- d i i.~ - 1,..- I. I.! III ' € ~ ~ I--ZJ, C I - 9 fT. I I I-._-III- - , ; , CU -OFF Tit NCH Fa:: go4.52z.o88z
_ cr _ ~i i ti ~ ~ • • ~ • - 2r I , , I_ _I ~ = ~ 1-I i I ~I i I I-~ (EXCHANGE D BACK6ILL
' ~'6 DIAMETER FOR BAY , ~ , 1 ~ ~ ~ <'; 'DEWATERING DRAIN . : ~ W/ COMPAC'~D SOIL)
W .VNY. IN. 721.00.. + • ;:H 1' X \ LAND DEVELOPMENT DESIGN SERVICES
. ~t Q JtVV. OU1; 7 5 u N -E- - ; ~ ,
• ; . , t..: ' W ~ y , t
. . O , . 1 . r W ~ ~ , . t<.
N ° , ~ . . Y 4 s~°~.
~5 . . ~ , . . . ~ t GENERAL NOTES. N ~ , WATER Q AIJTY BfISIN CONSTRUCTIO IN INFORMATION U WATER UAUTY BAS -
w N E - ~h.
. 1. AS BUILT DRAWINGS TO BE PROVIDED TO T . , . ~ • • X ~ ~ PURPOSES PRIOR TO RELEASE OF CONTRAC PROVIDED TO TURNBULL SIGMON DESIGN FOR CMS DOCUMENTATION SPECIFICATIONS. BASIN: BASIN 1 .SE OF CONTRACTOR RETAINAGE. BASIN BOTTOM ELEVATION: 720 MSL - "
. r ' 2 POND MAINTENANCE TO BE AS INDICATED II A. EARTHWORK PERMANENT POOL ELEVATION: 726 MSL
.rn ' , . ~ ~ ~ ~ ~ ' PRACTICES DESIGN GUIDELINES, o AS INDICATED IN THE NCDENR STORMWATER BEST MANAGEMENT A HA C EARED OF TREES LOGS STUMPS ROOTS ~ r IES• 1. THE FOUNDAl10N ARE S LL BE L ~ ~ TEMPORARY POOL ELEVATION: 728.86 MSL ~ ;
~ 2b FT..FbREI3AY 'o W X ~ l N m;; • ° IR SECTION ~ 3. CONTRACTOR TO SUBMIT SEALED SHOP DRI F TO ESTABLISH VEGETATION THE „ ~ ' BOULDERS, SOD AND UNSUITABLE SOIL. I NEEDED ~ PERMANENT POOL SURFACE AREA: 23,600 SF 1 :ACED SHOP DRAWINGS OF OUTLET STRUCTURE DEVICE AND ALL TOPSOIL SHALL BE STOCKPILED AND SPREAD ON THE COMPLETED DAM AND SPILLWAYS. i;
. ~ o WE ~ v. ;s, - ;,~o APPURTENANCES FOR APPROVAL PRIOR TO . ;OVAL PRIOR TO CONSTRUCTION. N A110N AREA SHALL BE THOROUGHLY SCARIFIED BEFORE PLACEMENT OF DRAINAGE AREA: 46.05 AC ti4 • - ` THE FOU D ,
, ~ ~ ~ ` ' , - x ~ THE FILL MATERIAL IMPERVIOUS AREA: 20.05 AC 4296 ~
~ , . m, - ~ PLANT SCHEDULE: PERMANENT POOL VOLUME: 74,388 CU FT 2. EXISTING STREAM CHANNELS IN THE FOUNDATION AREA SHALL BE SLOPED NO STEEPER
~ WATER QUAUTY BASIN.. ~ . _ ~ , , ~ ~ e t : o ~ - THAN A RAT10 OF ONE HORIZONTAL TO ONE VERTICAL. THEY SHALL BE DEPEENED AND TEMPORARY POOL VOLUME: 75,500 CU FT
r X BASIN BOTANICAL NAME COMMON NAME ' ~ ~ ` • PERNIANE L - WIDENED AS NECESSARY TO REMOVE ALL STONES, GRAVEL, SAND, STUMPS, ROOTS, FOREBAY VOLUME: 15,692 cu ft 0.21 COMMON NAME SIZE SPACING AND OTHER OBJECTIONABLE MATERIAL AND TO ACCOMMODATE COMPACTION EQUIPMENT.
o N ~ i ~ . ' 1 pontederia cordata PICKERELWEED TAN ING WATER WHEN FILL IS PLACED SA/DA USED: 1.16 PICKERELWEED 1/3 QT, 2/3 PEAT POT 2.5 O.C. FOUNDATION AREAS SHALL BE KEPT FREE OF S D DIAMETER OF oRIFlCE: 3.0" CFI LESTON • CHARLOTTE
=ELEVATION OF 726.00 , . ' ~ D ' AR TAIL ~,~y ~ ~ ~ - ~ r., X 1 saururus cernuus UZ D UZARDTAIL 1/3 QT, 2/3 PLUGS 2' O.C. ON THEM. THE BORROW AREAS SHALL BE CLEARED OF STUMPS, ROOTS AND
~ ~ 7~ I ~ ~ ~ ; _ 'ti ~ X i 1 scirpus validus SOFT STEM BULRI UNSUITABLE SOIL. THE WATER QUALITY BASIN SHALL BE CLEARED AND ALL STUMPS ,~~-1 OFT STEM BULRUSH 1/3 QT, 2/3 PLUGS 3' O.C. REMOVED. yid,
~ . . ~ U, m~ \ o , ~ °
'a ,.2 ~ S ~ ~*1 C' , , ~ ~r, . ~ X ~ OILS ENGINEER WILL TAKE REPRESENTATIVE LS3P ASSOCIATES LTD. 3. BEFORE FIWNG OPERATIONS BEGIN, THE S T RM DRAINAGE DESIGN DATA OUTLET SO SAMPLES OF EACH PROPOSED FILL MATERIAL AND TEST THEM TO DETERMINE THE 112 SOUTH TRYON
N e:
WATER QUALITY IFGEN[ ~ ~ . i O LE END/PLAI~ITING. COMPACTION AND CLASSIFICATION CHARACTERISTICS (PROCTOR TEST). ONLY THOSE UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM LENGTH SIZE SLOPE q~gRLOTTE NC 28284 G , MATERIALS AS APPROVED BY THE SOILS ENGINEER WILL BE USED AS FILL ON THE DAM. STRUCTURE STRUCTURE INVERT INVERT (FT) (IN) (FT/FT)
DESCRIPTION j O , DESCRIPTION GENERALLY SM OR SC CLASSIFCATION SOILS WILL BE ACCEPTABLE. COMPACTED TEL [phone] FAX [phone] ~ SYMBOL EARTH FILLS SHALL BE CONSTRUCTED TO THE ELEVATIONS, LINES, GRADES AND CROSS OS~127 HW~128 719.80 719.37 43 54 0.0100 HTTPJ/WWWIS3P.COM
D w ~ ~ _ . o i ~ ~ ;N 1 N `,CLEAN OUT STAKE ~ PLUNGE POOL/ SECTIONS INDICATED ON THE PLANS. 1 ALL PIPE TO BE CLASS. III RCP, UNLESS NOTED OTHERWISE. +q++++aBtmup,,
~r r ~ y ~ ~ - , , i ~ f, G r; ~ E[•EV:.722;00..' ~ APRON/SPILLWAY ~ , ~ N °G 'OOL SUBMERGED AND PLANTED O ~ , 'ILLWAY LJTTORAL SHELF 4. AFTER STRIPPING OF FOUNDATIONS AND REMOVAL OF WEAK OR UNSUITABLE MATERIALS SRO
( ~ o ~ ~ HAS BEEN COMPLETED, AND BEFORE START OF MATERIAL PLACEMENT, COMPACTED a` ESSI
1 ~ o ~ ~ , ° ..~F ' ' } , , EARTH SHALL BE USED TO FILL ALL STUMP HOLES, MINOR EXCAVATIONS AND OF 0 ' MAINTENANCE ACCESS I I TH EARTH FILL LIMITS. 0.5 FT. 6•p FL 0.5 FT. ; ~
t , , - WATER ELtVAT10N ~ EVATION DEPRESSIONS FOR CAVITIES NS DE E :a DRIVE
'w 028 5. FILL SHALL BE PLACED IN HORIZONTAL LAYERS OF NO'f MORE THAN (9) LOOSE DEPTH. ° s
I ~ r, ' ~ 34 r ~ OSUBMERGED LITTORAL ShELF TO BE PLAP AS SOON AS FEASIBLE AFTER STARTING CONSTRUCTION OF A FILL. THE CENTRAL 4 ~ ~ :l~ `l iELF TO BE PLANTED WITH A MIXTURE OF I " '•.N F.~° PORTION THEROF SHALL BE BUILT AND MAINTAINED SLIGHTLY HIGHER THAN THE SIDES 2-1 2 EDGE ••.CINE..•
~ ' ` ~ ~ X PICKERELWEED (pontederia cordata), LIZARD . , .b ° ordata ,LIZARD TAIL saururus cemuus , - / q ) ( ) TO ALLOW FREE DRAINAGE TO THE SIDE SLOPES.
~ ~ ` _ BASIN OU RE AND SOFT STEM BULRUSH sci us validus _ eW ~ . , . . • .:SEE DETAILS ~1 AN ` FOR SIZE AND SPACING REQUIRMENTS. ~cirpus validus), SEE PLANTING SCHEDULE ~q4, UIRMENTS. 6. EACH LAYER OF FILL SHALL BE COMPACTED BY ROLLING WITH COMPACTION EQUIPMENT ~ ~ ~ rNnnimn11++
, ° ~ ~w _ ° ••fOR ADDITIC~JA I . T10N'`.` ; , , < . ~ HINGE(S) " WHICH IS BEST SUITED FOR THE TYPES OF SOIL ENCOUNTERED. FILL ADJACENT TO o ; , ~ ++aauttnUpp,
j . ~.u , , j , , • • , OS#127 / PIPE CONDUIT AND ANTISEEP COLLARS SHALL BE COMPACTED BY HAND. EACH LAYER ~ s Jp+++ ~4i,,~
~ a.~ r ~ dNV: ` OF FILL SHALL BE COMPACTED TO NOT LESS THAN 959: MAXIMUM DRY DENSITY c-0 ~ as°.°.a.°a° (STANDARD PROCTOR) AT OPTIMUM MOISTURE CONTENT. WETTING OR DRYING OF THE ~ ' ,°°~NGlly~c°•°,
°?s t gp ~ ' ; . X MATERIAL AND MANIPULATION TO SECURE UNIFORM MOISTURE CONTENT THROUGHOUT ~ : 0 Fop
ACH LAYER SHALL BE RE UIRED. DENSITY TESTS WILL BE PERFORMED AT A ~ = ~ ~ E Q : to ~i:
~ ~ , FREQUENCY AS SPECIFIED BY THE SOILS ENGINEER. AS A MINIMUM, TESTS WILL BE :'-C-2235: I 1 .tn .z, A PERFORMED ON EVERY THIRD LIFT OR EVERY 1000 CUBIC YARDS WHICHEVER COMES • ~ - - ~ a o i~ ~ ~
~ ~ x <j ~ 2S ' . y FIRST. ALSO DENSITY TEST WILL BE PERFORMED WHENEVER FILL MATERIAL ~ / ~ ; ~ r7
. ~T by ~ o CHARACTERISTI S CHANGE. ~ .HINGE ~ "aeo ~ "'M^ C ALUMINUM GRATING AND HATCH ~ 1 8" STEEL ~ '4 ~G 0
~ { ~ ~ 43, LF. ,OF , 5 " CP 1 . 1.OOX SL X ~ / P A ~'~~i <</S I GMO~ B. OUTLET DEVICE TO BE DESIGNED AND CERTIFlED ANGLE L TE \ ~,,~~rr
, A } - ~ ~ ° y A BY MANUFACTURER. ~ I ~ nnnnm++ ~ - 1. OUTLET DEVICE COMPONENTS ARE TO FABRICATED AS SHOWN ON THE PLANS, CONTRACTOR TO SUBMIT • ++N++auttnUrrgri
E ~ N -SEEP COLLA ' , ~ ~ ~ , SHOP DRAWINGS TO ENGINEER " ~ ~i,~
X , ~ ~ ~ 3 ~ _ 2 ~ 2. CONTRACTOR TO SUBMIT DESIGNED SHOP DRAWINGS TO THE CIVIL ENGINEER FOR 2 GRATE C'AR ~i, FOR APPROVAL PRIOR TO / ~ ~ ~ APPROVAL PRIOR TO CONSTRUCTION TO THE OUTLET DEVICE. SHOP DRAWINGS SHOULD ~ ~ ~
S ~ - ~ ~ , . 128 m FABRICATION 6" STAINLESS STEEL • : / ~ ~ ° y 's COVER ALUMINUM STEPS AND ° ~ • INCLUDE PRECAST BOX DESIGN, TRACH RACK, GRATED ~ ~o • 9 ;
t ~ ~ N O T: ALL DRAIN/ORIFlCE PIPING REQUIRED. ANCHOR BOLT. EPOXY : 0 IN PLACE ~ ° ~ '
~ ~ ~ 1937 ~ ~ . ~ ~ 3 C• CONCRETE = e ~ a Q - "s •
D ~ ~ r 1. ALL CONCRETE SHALL CONFORM TO THE STANDARD SPECIFICATIONS FOR READY MIXED eWr ;
~ o~ - ~q CONCRETE ASTM C 94. AN AIR-ENTRAINING ADMIXTURE SHALL 8E ADDED. THE PLAN ? CONCRETE SHALL BE PROPORTIONED TO MEET THE FOLLOWING REQUIREMENTS: ~G
r S M _ ,A. q~~ S~~N 0~
SS II RIPRAP AP q COMPRESSIVE STRENGTH: MINIMUM 3600 PSI 1 ~~~~rrunnt tunas+~`~ I1 WATER-CEMENT RAT10: 0.40 - 0.50 7.0 FT. MEMBERS OF THE AMERICAN INSTITUTE OF ARCHTKTS
r---" / LENGTH: , 15 T. L- ~ ~ X32 FES ~ S 1-~ / \ .WIDTH: 9 - 20 FT: J~~-~--~--_ • " " . . SLUMP. MINIMUM 3 ,MAXIMUM 5
DEPTH: 24 \ x ~ h~_ / ~ °D AIR CONTENT: MINIMUM 5%, MAXIMUM 87 " " " COPYRIGHT 2003 ALL RIGHTS RESERVED
• \ CONTRACTOR TO PLACE A DITIONAL ~'4":; O MAXIMUM SIZED STONE ON TOP OF, ~ S COARSE AGGREGATE: 1 - 1 1/2 18 ALUMINUM ~ z ACCESS' LADDER ~:-`pRINT® OR ELECTRONC ~WNCS AN)
; ~ THE APRON, SIMILAR TO PATTERN X D. GRASSING f 6 GRAVEL ° ~ , ; 6" DOCUMENTATION MAY NOT
~ A Q ~ INDICATED, TO FURTHER INCREASE , 'y 16" RIPRAP FILTER FABRIC 1. GRASS ALL AREAS DISTURBED BY CONSTRUCTION PER SPECIFICATION OF EROSION
r-- \ 'THE AFFECTS OF ENERGY DISSIPATION SECTIi :~1p`` ' PRIOR TO ENTERING LEVEL SPREADER. ~ ' COMPACTED SECTION A-A CONTROL C0401. TRASH RACK b " 4-1 2" 4-1/2" N ANY FORM NtIT}IOUT WRfTTBV P6tMISSION •z
A \ ' ~ \ ~ ~ ~ .w ~ , X EARTH ~ '~°'~°~90 LF 4EVEL SPREADER ° ~ FROM LS3P ASSOCIATES LTD. -
~ \ t~ ` '`-SEE DETAIL FOR ADDITIONAL I'' 1. WETLAND PLANTINGS SHALL BE ADDED AS REQUIRED BY STORMWATER BEST
~ ~ ~ ~ ~ OUTLET A B C \ INFORMATION: ~ : ~ B C D RIPRAP CLASS MANAGEMENT PRACTICES. PLANTING SHALL BE BASED ON AVAILABILITY OF PLANTS 7. FT. ~ " LISTED IN TABLE 2.2 OF NCDENR BEST MANAGEMENT PRACTICES DESIGN GUIDELINES. O 3.0 DIAMETER 63" F~4" R P 54"
~ E~ E6 LIMI ,TYPICAL i ~ FES 5 10 20 4 ~ ~ , I ti ~ Y` 1-~~, \ rw`^ ~ FES~55 20 1B' 14 20' 4' 14 2 INLET ORIFICE ~
~ A ' 15' 14' 9' 2 _ _ _ _ ' _I _ 1 01 19 O5 ,rt(K REV. SHEET NUMBERS AND
A , A / / ASSOCIATED ITEMS OPERAl10N AND MAINTENANCE PLAN: 2 03/08/05 ,A(K REV. PER ENGINEERING
- ~ " COMMENTS A. INSPECT MONTHLY. OR AFTER EVERY RUNOFF-PRODUCING RAINFALL EVENT. 6" DIAMETER 4 ~1 2 4-1/2
t BASIN DRAIN - , • , " .i . ; 3 05/13/05 JKK RELEASED FOR BIDDING WHICHEVER COMES FIRST _ . ; , , g
r- ~ n ~ n ~n do an ~n
v 1. REMOVE DEBRIS FROM THE TRASH RACK. w~ou~w o~m n~raw rcn v~uwn
2. CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS. IF A PUMP IS USED AS A
DRAW DOWN MECHANISM CHECK FOR PUMP OPERATION. iFt* 3 3. CHECK THE POND SIDE SLOPES, REMOVE TRASH, REPAIR ERODED AREAS BEFORE
THE NEXT RAINFALL EVENT. 6" GATE VALVE
W/ WHEELS RN 4. IF THE POND IS OPERATED WITH A VEGETATED FILTER, CHECK THE FILTER FOR
I SEDIMENT ACCUMULATION, EROSION AND PROPER ORIENTATION OF THE FLOW EXTENDED TO TOP_
HARDWARE CLOTH ACROSS ALL OUTLET SOURCE POINT FLOW IN SPREADER MECHANISM. REPAIR AS NECESSARY. OF STRUCTURE )W IN
OPENINGS. REFER TO DETAIL 'A' FOR ADDITIONAL INFORMATION. CONTRACTOR A I B. QUARTERLY OUTLET STRUCTURE PLAN
TO REMOVE HARDWARE CLOTH RIPRAP TIE WIRE MESH/HARDWARE CLOTH TO REBAR. 90 FT. 1. INSPECT THE COLLECTION SYSTEM IE: CATCH BASINS, PIPING, GRASSED SWALES FOR PROPER FUNCTIONING. CLEAR ACCUMULATED TRASH FROM BASIN GRATES,
AND WASHED STONE AFTER SITE HAS ATTACH REBAR TO CONCRETE RISERS USING BASIN BOTTOMS, AND CHECK PIPING FOR OBSTRUCTIONS.
BEEN STABILIZED. COORDINATE WITH 1/4" WEDGE ANCHORS. USE WS-1422 ANCHORS NCDENR LOCAL INSPECTOR. BY REDHEAD OR EQUIVALENT F o B ~ 2. CHECK POND INLET PIPES FOR UNDERCUTTING, REPLACE RIPRAP, AND REPAIR
N B BROKEN PIPES. i
#5 WASHED STONE ° 3. RESEED GRASSED SWALES, INCLUDING THE VEGETATED FILTER IF APPLICABLE. /
CLASS I RIPRAP ° A YEAR AS NECESSARY. REPAIR ERODED AREAS IMMEDIATELY. 5-X5-X3/8- TWICE STAINLESS STEEL
C. EVERY SIX MONTHS ANGLE PROJECT: 03055
2"X4" CLEAN OUT STAKEt CLEAN OUT BASIN WHEN 1. REMOVE ACCUMULATED SEDIMENT FROM THE BOTTOM OF THE OUTLET STRUCTURE. DATE: 12/20/04
SEDIMENT REACHES TOP 2. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE POND. IF DEPTH IS REDUCED ~ DRAWN TTY: STC
OF STAKE. REFER TO _ TO 75% OF ORIGINAL DESIGN DEPTH, SEDIMENT WILL BE REMOVED TO AT LEAST 1.0 / / I ~
EROSION CONTROL PLAN o FOR SEDIMENT STORAGE ORIGINAL DESIGN DEPTH. TYPICAL CHECKED BY: STC
0 ELEVATION. D. GENERAL
I r" 0 12 1. MOW THE SIDE SLOPES, NOT INCLUDING NORMALLY SUBMERGED VEGETATED SHELF, ACCORDING TO THE SEASON. MAXIMUM GRASS HEIGHT WILL BE 6".
~'~Si' 1 ,are A DISSIPATED FLOW OUT f u IN N OUT )W OUT m Fl 2. CATTAILS, AND OTHER INDIGENOUS WETLAND PLANTS, ARE ENCOURAGED ALONG \
° I I PLAN THE POND PERIMETER. HOWEVER THEY MUST BE REMOVED WHEN THEY COVER
~n I THE ENTIRE SURFACE AREA OF THE POND.
C C I I - I I #4 REBAR 3. THE ORIFICE IS DESIGNED TO DRAW DOWN THE POND IN 2-5 DAYS. IF DRAW DOWN - - STORMWATER IS NOT ACCOMPLISHED IN THAT TIME, THE SYSTEM MAY BE CLOGGED. THE SOURCE
i OF CLOGGING MUST BE FOUND AND ELIMINATED. 6" STAINLESS STEEL MANAGEMENT 90
- 4. ALL COMPONENTS OF THE DETENTION POND SYSTEM MUST BE KEPT IN GOOD ANCHOR BOLT. EPOXY IN PLACE BASIN
EARTH 6" GRAVEL N HARDWARE CLOTH ACROSS ALL OUTLET " C-4 WORKING ORDER.
19 WIRE MESH COMPACTED 18" RIPRAP SECTION A-A FILTER FABRIC OPENINGS. REFER TO DETAIL A FOR ' 5. UPON COMPLETION OF THE POND AND PROJECT DEVELOPMENT, CHARLOTTE- MECKLENBURG SCHOOLS SYSTEM WILL BE THE RESONSIBLE PARTY FOR
ADDITIONAL INFORMATION. CONTRACTOR OPERATION AND MAINTENANCE. f
TO REMOVE HARDWARE CLOTH, RIPRAP r= AND WASHED STONE AFTER SITE HAS • ` • DETAIL 'A' e18" ~ RAP
BEEN STABILIZED. COORDINATE WITH COMPACTED VEL
N NCDENR LOCAL INSPECTOR. EARTH SECTION B-B MON B-B FABRIC 1. CONTRACTOR IS FULLY RESPONSIBLE FOR CONTACTING APPROPRIATE PARTIES AND ASSURING THAT EXISTING UTILITIES ARE LOCATED PRIOR TO LLJ Er C0801
BEGINNING CONSTRUCTION. CALL NC ONE
4 CALL CENTER
OUTLET STRUCTURE EROSION CONTROL MEf'_l%SURES LEVEL SPREADER DETAL 2. CONTRACTOR IS RESPONSIBLE FOR PLACING BARRICADES, USING FLAG BEFORE YOU DIG MEN, ETC. AS NECESSARY TO ENSURE THE SAFETY OF THE PUBLIC. ~OP STAINLESS STEEL
3. ALL PAVEMENT CUTS, ASPHALT OR CONCRETE, ARE TO BE PLACED 1-600-632-4949 ANGLE CLIPS Avao 6nUry TYPICAL ACCORDING TO STANDARDS OF THE NORTH CAROLINA DEPARTMENT OF DAMAGE
TRANSPORTATION AND CMU SPECIFICATIONS.
4. SHORING WILL BE ACCORDING TO OSHA TRENCHING STANDARDS PART OUTLET STRUCTURE ANCHOR SOLUTIONS THROUGH LISTENING
1926, SUBPART P, OR AS AMENDED. SERVICE BY DESIGN
1 2 3 NTS 6 CONSTRUCTION DOCUMENTS UCTION DOC 4 5

A—
B-
C-
D-
E -
F
H-
60' Public R/W
1
VICINITY MAP
NTS
0 100 200 400 600 800
MALLARD
CREEK
HIGH
SCHOOL
Izat
(xms
Charlotte—Mecklenburg Schools
9
r
Turnbull Sigmon Design
Iool Morehead Square Dr.
Suite 530
Charlotte, NC 28203
Phone: [phone]
Fa:: 704.522.o882
LAND DEVELOPMENT DESIGN SERVICES
CHARLESTON CHARLOTTE
LS3P ASSOCIATES LTD.
112 SOUTH TRYON
CHARLOTTE, NC 28284
TEL. [phone] FAX [phone]
HTTP://WWW.LS3P.COM
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MEMBERS OF THE AMERICAN INSTITUTE OF AF'CHITECTS
COPYRIGHT 2003 ALL RIGHTS RESERVED
PRINTED OR ELECTRONIC DRAWINGS AND
DOCUMENTATION MAY NOT BE REPRODUCED
IN ANY FORM WITHOUT WRITTEN PERMISSION
FROM LS3P ASSOCIATES LTD.
REVISIONS:
PROJECT: 03055
DATE: 12/09/04
DRAWN BY:
CHECKED BY:
SOLUTIONS THROUGH LISTENING
4
6
1
5
MALLARD
CREEK
HIGH
SCHOOL
Izat
(xms
Charlotte—Mecklenburg Schools
9
r
Turnbull Sigmon Design
Iool Morehead Square Dr.
Suite 530
Charlotte, NC 28203
Phone: [phone]
Fa:: 704.522.o882
LAND DEVELOPMENT DESIGN SERVICES
CHARLESTON CHARLOTTE
LS3P ASSOCIATES LTD.
112 SOUTH TRYON
CHARLOTTE, NC 28284
TEL. [phone] FAX [phone]
HTTP://WWW.LS3P.COM
\A CAR
/V"**
,
°W c�< _
o-,C-22350*oo
z
AO,X'��''.
opo , ooy ,
os =
oC-157 P.
�l °°°°°°° °°°S�C�
MEMBERS OF THE AMERICAN INSTITUTE OF AF'CHITECTS
COPYRIGHT 2003 ALL RIGHTS RESERVED
PRINTED OR ELECTRONIC DRAWINGS AND
DOCUMENTATION MAY NOT BE REPRODUCED
IN ANY FORM WITHOUT WRITTEN PERMISSION
FROM LS3P ASSOCIATES LTD.
REVISIONS:
PROJECT: 03055
DATE: 12/09/04
DRAWN BY:
CHECKED BY:
SOLUTIONS THROUGH LISTENING