20021204 Ver 1_COMPLETE FILE_20020730

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
Coleen H. Sullins, Deputy Director
Division of Water Quality
Division of Water Quality
Department of Environmental and Natural Resources
Wetlands/401 Unit
Street Address: 2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
Mailing Address: 1650 Mail Service Center
Raleigh, NC 27699-1650
Contact Information: Phone #: [phone]
Fax #: [phone]
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Fax To: T
Company: t S
Number of pages including cover sheet:
Notes or special instructions:
X30
Fax #: 763 - S 33-- tW(
Date:
°1_,)- & - C) 3
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (httpJ/h2o.enr.state.nc.us/ncwetlands

1

F NIATF Michael F. Easley, Governor
Q iQ William G. Ross Jr., Secretary
`Q? QG North Carolina Department of Environment and Natural Resources
Uj r Alan W. Klimek, P.E. Director
Division of Water Quality
September 23, 2003
DWQ# 02-1204
Mecklenburg County
Mr. Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC, 28202
Re: Northlake Village
Stormwater Practices
Dear Mr. Shields:
This Office is in receipt of the plans dated August 28, 2003 and revisions dated September 12, 2003 for
the extended detention wetlands, modified natural wetlands/flood plain, and bioretention areas at the subject
facility prepared on your behalf by Walter L. Phillips, Inc. and submitted to the Division on September 23, 2003.
Staff from the Wetlands Unit reviewed the plans and found them acceptable. This satisfies condition no. 1 of
the 401 Water Quality Certification dated July 22, 2003. Please note that this approval is for water quality
purposes only and shall not be construed as an approval of the design for dam/outlet structure integrity, Dam
Safety, public safety, or flood attenuation purposes.
If you have any questions regarding this matter, please co tact Mr. Todd St. John at [phone].
'ncerely,
John R. orney
Wetlands Unit Supervisor
cc: Mooresville DWQ Regional Office
File Copy
Len Rindner, 3714 Spokeshave Lane, Matthews, NC, 28105
oft
Service
\ Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer
1 800 623-7748
\NVIIXIII'I,I? I I1 III l,ll? ;.. IN(I( )
??'.reriti le 94.)
September 22, 2003
Mr. Todd St. John, P.E.
NCDENR - Division of Water Quality
Wetlands Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: Northlake Village - DWQ Proiect No. 021204

nAC
Dear Todd, :??ATERQUALITY SE CCTION
On September 18 we received the attached letter from you listing some additional
information necessary to complete the technical review process for the above referenced project.
Your comment was as follows:
COMMENT 1: Bio-Retention Areas
The velocities at the inlets for the bioretention areas should be non-erosive. The
information provided does not verify that non-erosive velocities will be achieved;
especially considering that the ground cover proposed is mulch which may only be
expected to accommodate about 1 foot per second. Also, please provide the maximum
velocity anticipated in bioretention area no. 7.
RESPONSE 1:
Enclosed sheet D7a is to serve as a sheet insert for the current plan set. This
revised sheet shows detailed inlet velocity calculations which accurately quantify the
inlet reducing properties of the proposed inlet deflectors and the proposed planting strips
specified for each bioretention area. We made a conservative assumption for the velocity
reducing properties of the inlet deflector based on field experience. We evaluated the
velocity difference between an earth lined channel (planting strip) and a concrete channel
(parking area) to achieve velocity reduction estimate for the planting strip located in each
bioretention area. The calculations can be seen on the enclosed sheet. Enclosed sheet D11
is also intended to serve as a sheet insert for the current plan set. This revised sheet
contains a note indicating the expected velocity for bioretention area no. 7.
'()l P;111, A?,rnu? ('IVII. kNGINITRS
I?;lH,Chli .,iI -III .'?MO I'ANPSURVF,YORS
lil?lihunr i'U4i ) ol('{ PIJANNF,RS
Iil,tiI ill' iM,'. ?" "(II 1 ANUS( \1'I,/AR('1111'1;('I'S
1 I .AR', OI IT01?I- SK)N?Al SI`I11VI(]
WAI:11"R l.. I'IIII,L,II',S, IN('URlIORAI'F;D
Votcnded 194.5
Mr. Todd St John -3- August 28, 2003
RESPONSE: An operation and maintenance agreement for the bioretention areas and the
natural area floodplain has been developed based on the standards in the
NCDENR stormwater best management practices. It has been signed and
notarized and was added to sheet DU
I trust that you will find this narrative helpful in your review of this revised plan. Please
do not hesitate to contact me if you have any questions or comments.
Sincerely,
Jeff Stuchel, P.E., L.S.
cc: Len Rindner, w/enc. (1) - FedEx
Mike Moukalian, Taubman, w/enc. (1) - FedEx
Dan Rodriguez, JPRA, w/enc. (1) - FedEx
sdskproj/03-001/notes/drainage plan state comment responses.doc
OF NATFA Michael F. Easley
O? pG Governor
Cj William G. Ross, Jr., Secretary
j Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
August 7, 2003
Mr. Jeffery J. Stuchel, PE, LS
Walter L. Phillips
207 Park Avenue
Falls Church, VA 22046
Subject: North Lake Village
DWO Project No. 021204
Mecklenburg County
Dear Mr. Stuchel:
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
1. Bioretention Areas
The velocities at the inlets of the bioretention areas should be non-erosive. The information provided does not verify
that non-erosive velocities will be achieved, especially considering that the ground cover is proposed as mulch
which may only be expected to accommodate about 1 foot per second. Also, please provide the maximum velocity
anticipated in bioretention area no. 7.
If you have any questions or would like to discuss this project, please contact me at [phone]. Also, please note
that the NC DENR Stormwater Best Management Practices Manual as well as other documents and information can be
downloaded frdn the Wetlands Unit web site at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.htm1.
Sincer ly,
Todd t. John, PE
Environmental Engineer
cc: Mooresville Regio,Office
File
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WALTER L. PHILLIPS, INCORPORATED
Founded 1945
Mr. Todd St. John -2 September 22, 2003
We believe this comment response letter along with the above mentioned sheet inserts
satisfies all requirements for you to complete the technical review process. If you have any
questions or need additional information, please feel free to contact me at your earliest
convenience.
Sincerely,
effrey J4. 2&G
J. Stuchel, P.E., L.S.
oo? w A 7' F9Q?
r

Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
August 7, 2003
Mr. Jeffery J. Stuchel, PE, LS
Walter L. Phillips
207 Park Avenue
Falls Church, VA 22046
Dear Mr. Stuchel:
Subject:
North Lake Village
DWQ Project No. 021204
Mecklenburg County
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
Bioretention Areas
The velocities at the inlets of the bioretention areas should be non-erosive. The information provided does not verify
that non-erosive velocities will be achieved, especially considering that the ground cover is proposed as mulch
which may only be expected to accommodate about 1 foot per second. Also, please provide the maximum velocity
anticipated in bioretention area no. 7.
If you have any questions or would like to discuss this project, please contact me at [phone]. Also, please note
that the NC DENR Stormwater Best Management Practices Manual as well as other documents and information can be
downloaded from the Wetlands Unit web site at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.html.
Sincerely,
Todd t. John, PE
Environmental Engineer
cc: Mooresville Regional Office
File
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/

LETTER OF TRANSMITTAL
Todd St. John Date: September 22, 2003
NCDENR - Division of Water Quality Job #: 03-001
-Wetlands Unit
2321 Crabtree Boulevard, Suite 250 Re: NorthLakes Village
Raleigh, NC 27604
The following is O For Approval @ For Your Use O As Requested 0 For Bids Q Submittal for Distribution
copies Uate Description
1 9/22/03 Drainage Plan Sheet Inserts D7a and D11
1 9/22/03 Comment Response Letter
Remarks
EV
51401 CftF
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NATERQUALITV
sECRoN
to
By: Jeffrey J. Stuchel, P.E., L.S.
Walter L. Phillips, Incorporated
Civil Engineers, Surveyors, Landscape Architects, and Planners
207 Park Avenue, Falls Church, Virginia 22046
[phone]; [phone] (Fax)
Method: Fed Ex. p.m.
File: N.C.
LETTER OF TRANSMITTAL
Todd St. John Date: August 28, 2003
NCDENR - Division of Water Quality
-Wetlands Unit Job #: 03-001
2321 Crabtree Boulevard, Suite 250 Re: NorthLakes Village
Raleigh, NC 27604
The following is O• For Approval OO For Your Use @• As Requested 0 For Bids O Submittal for Distribution
Copies Date Description
1 8/28/03 Drainage Plan
1 8/28/03 Comment Response Letter

k
{
1 7-

Remarks
odd,
'lease find attached the revised plan for the Wetlands Permit. Please feel free to call if you have
ny questions or need any additional information.
nks.
a`f
Copied to
Len Rindner - 1 copy (FedEx)
Dan Rodriguez - 1 copy (FedEx)
Mike Moukalian - 1 copy (FedEx)
By: Jeffrey J. Stuchel, P.E., L.S.
Walter L. Phillips, Incorporated
Civil Engineers, Surveyors, Landscape Architects, and PIP
207 Park Avenue, Falls Church, Virginia 22046
[phone]; [phone] (Fax)
Method: Fed Ex. p.m.
1, 1'llll_,11i't
V 04z
August 28, 2003
Via Fed Ex
Mr. Todd St John '40)1035 A111V110
North Carolina Division of Water Quality
401 Wetlands Certification Unit
1650 Mail Service Center
Raleigh, NC 27699-1650 ,? ndo &/Y ,
'!1
Re: North Lake Village, DWQ Project No. 021204, Mecklenburg County i1 1 IG
Dear Todd,
Attached please find one (1) copy of the above captioned site plan and associated
maintenance agreements. This plan has been revised to incorporate the applicable comments
contained in your letter dated August 7, 2003 and is hereby submitted for approval.
A summary of your comments and our response to each comment is as follows, with our
responses noted in italics:
COMMENT 1: Temporary Water Quality Pool
The numbers for the 1" storage do not correspond to the numbers provided
in the worksheet. Please clarify.
RESPONSE: The numbers have been revised. They now match the numbers provided in
the worksheet (see sheet D7).
COMMENT 2: Draw Down Orifice Diameter
It is recommended that the diameter of the draw down orifice be selected to
draw down closer to 48 hours so that the plant will be inundated for shorter
periods.
RESPONSE: The opening of the draw down orifice has been adjusted to a draw down
period closer to 48 hours (see sheets D15 and D16).
?U/ I'.n1,, \ Cunr IVII I,NGINI.I:ILS
Valk ('fine i A irc_ini.i ."010 - I? 1 AN1) 5l RVI (WN
I"Irldwil' ( 021) -) ;' (,I(,3 z ITANNl,Wt
I41r,i;nil, i7() (i ), l;W I"ANA )ti4'AN:;VR('IIf1'IX,iN
1'L,AR`: [il? I'I?UI?L.titiIU)?;AI 51?.1:V1(I?
WAI]'1,'1R L. PHILLIPS, 1NC'ORP0RA'I,ED
Founded 1945
Mr. Todd St John -2-
COMMENT 3: Emergency/Maintenance Drain
August 28, 2003
An emergency/maintenance drain must be provided to draw down the
permanent pool volume. It may be possible to use a pump but its use must
be specified
RESPONSE: A sluice gate will be provided with the riser structures in order to draw
down the permanent pool volume (see sheets DI5 and D16).
COMMENT 4: Plunge Pool
It is recommended that a plunge pool or forebay be constructed at the inlet
of the natural system/flood plain treatment area.
RESPONSE: A plunge pool at the inlet of the natural system and flood plain treatment
area has been provided (see sheet D17).
COMMENT 5: Bioretention Areas
The velocities at the inlets of the bioretention areas should be non-erosive.
Please provide the approximate inlet velocities for a 10 year discharge.
Also, please provide the maximum velocity anticipated in bioretention area
no. 7. Worksheets for bioretention areas can be found at
http://h2o.chnr.state.nc.us/ncwetlands/mitresto.htmi.
RESPONSE: Worksheets for bioretention areas have been added to the plan (see sheet
D7a). The velocities for a 10 year discharge at the inlets of the bioretention
areas can be found on these worksheets.
COMMENT 6: Operation and Maintenance Agreement
An operation and maintenance agreement for the bioretention areas and
natural area flood plain is required. One for all of the bioretention areas will
suffice. The operation and maintenance agreement must also be signed by
the responsible party and notarized.
WATF9
QG
?y
...rr- `C
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
August 7, 2003
Mr. Jeffery J. Stuchel, PE, LS
Walter L. Phillips
207 Park Avenue
Falls Church, VA 22046
Subject:
Dear Mr. Stuchel:
North Lake Village
DWQ Project No. 021204
Mecklenburg County
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
1.
2.
3.
4.
5.
6.
Temporary Water Quality Pool
The numbers for the 1" storage do not correspond to the numbers provided in the worksheet. Please clarify.
Draw Down Orifice Diameter
It is recommended that the diameter of the draw down orifice be selected to draw down closer to 48 hours so that
the plant will be inundated for shorter periods.
Emergency/Maintenance Drain
An emergency/maintenance drain must be provided to draw down the permanent pool volume. It may be possible to
use a pump but its use must be specified in the Operation and Maintenance Agreement and on the plans.
Plunge Pool
It is recommend that a plunge pool or forebay be constructed at the inlet of the natural system/flood plain treatment
area.
Bioretention Areas
The velocities at the inlets of the bioretention areas should be non-erosive. Please provide the approximate inlet
velocities for a 10 year discharge. Also, please provide the maximum velocity anticipated in bioretention area no. 7.
Worksheets for bioretention areas can be found at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.htmi.
Operation and Maintenance Agreement
An operation and maintenance agreement for the bioretention areas and natural area flood plain is required. One
for all of the bioretention areas will suffice. The operation and maintenance agreement must also be signed by the
responsible party and notarized.
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/
Page 2 of 2
If you have any questions or would like to discuss this project, please contact me at [phone]. Also, please note
that the NC DENR Stormwater Best Management Practices Manual as well as other documents and information can be
downloaded from the Wetlands Unit web site at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.html.
Sincerely,
Tod St. John, E
Environmental Engineer
cc: Mooresville Regional Office
File
Project Name: North Lake Village
Project No. DWQ 021204
SUBMITTED DESIGN: A REQUIRED DESIGN:
elevations
Permanent Pool (ft) 733
Temporary Pool (ft) 734.21
areas
Permanent Pool SA (sq ft) 22895
Drainage Area (ac) 11.46
Impervious Area (ac) /t9, I6
Forebay (ft2) 4579
High Marsh (ft2) 8013
Low Marsh (ft2) 8013
Micropool (ft2) 2290
volumes
Temporary Pool (cu ft)
29569
other parameters
SA/DA
Orifice Diameter (in)
Design Rainfall (in)
1.5
1
Linear Interpolation of Correct SAIDA***
% Impervious
Next Lowest 90
Project Impervious 100.0
Next Highest 100
1.21 ft. depth
18/ sq. ft.
M1 0.0 %
20 %
35.0 %
35.0 %
10.002184%
100%
39)cu. ft.
3 - z73
3.74
0.05 cfs drawdown
7.5 day drawdown
0 ft. Permanent Pool Depth
SA/DA from Table
3.74
3.74
3.74
ok
ok
checkforebc
ok
ok
check forebc
check tempo
check drawa
Project Name: North Lake Village
Project No. DWQ 021204
3
SUBMITTED DESIGN: REQUIRED DESIGN:
elevations
Permanent Pool (ft) 734
Temporary Pool (ft) 735.31
areas
Permanent Pool SA (sq ft) 110248
Drainage Area (ac) 7 Le 3W
Impervious Area (ac) 93189 Y, 04
Forebay (ft2) 22050
High Marsh (ft2) 38587
Low Marsh (ft2) 38587
Micropool (ft2) 11024
volumes
Temporary Pool (cu ft)
149917
other parameters
SA/DA
Orifice Diameter (in)
Design Rainfall (in)
3.5
1
Linear Interpolation of Correct SA/DA ***
% Impervious
Next Lowest 90
Project Impervious 100.0
Next Highest 100
1.31 ft. depth
A 641
1 3 7 sq. ft.
100.0%
20.000363 %
35.0 %
35.0 %
9.9992744%
100%
20 6ZC-)
254
,A cu. ft.
3.74
0.26 cfs drawdown
6.7 day drawdown
0 ft. Permanent Pool Depth
SA/DA from Table
3.74
3.74
3.74
ok
check surfac
check forebt
ok
ok
check forebc,
check tempo
check drawn
WAT Michael F. Easley, Governor
O?
?R
OCR pG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
`
Uj yr Alan W. Klimek, P.E. Director
> Division of Water Quality

July 22, 2003
DWQ# 02-1204
Mecklenburg County
Mr. Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC, 28202
APPROVAL of 401 Water Quality Certification with Additional Conditions
Dear Mr. Shields:
(This Certification replaces the one issued July 31, 2002.) You have our approval, in accordance with the attached conditions, to
place fill in 2,000 linear feet of intermittent streams in order to construct the NorthLake Village Shopping Center in Mecklenburg County,
as described in your application received by the Division of Water Quality on July 31, 2002 and revised July 8, 2003. After reviewing your
application, we have determined that this fill is covered by General Water Quality Certification Number 3402, which can be viewed on our
web site at hftp://h2o.enr.state.nc.us/ncwetlands. This Certification allows you to use Nationwide Permit Number 39 when it is issued by
the U.S. Army Corps of Engineers. In addition, you should get any other federal, state or local permits before you go ahead with your
project including (but not limited to) Sediment and Erosion Control, Non-Discharge and Water Supply Watershed regulations. Also this
approval will expire when the accompanying 404 permit expires unless otherwise specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application. If you change your project, you must
notify us in writing and you may be required to send us a new application for a new certification. 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. If total wetland
fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506
(h). For this approval to be valid, you must follow the conditions listed in the attached certification, as well as the additional condition
listed below:
An additional condition is that a final, written stormwater management plan for commercial area "B" incorporating a stormwater
treatment wetland shall be approved in writing by this Office before the impacts specified in this Certification occur. The stormwater
management plan must include plans and specifications for stormwater management facilities designed to remove 85% TSS
according to the most recent version of the INC DENR Stormwater Best Management Practices Manual. Also, before any permanent
building is occupied in commercial area "B", 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 and 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;
2. An additional condition is that a final, written stormwater management plan for commercial area "A" incorporating a stormwater
treatment wetland shall be approved in writing by this Office before construction activities commence in commercial area "A". The
stormwater management plan must include plans and specifications for stormwater management facilities designed to remove 85%
TSS according to the most recent version of the NC DENR Stormwater Best Management Practices Manual. Also, before any
permanent building is occupied in commercial area "A", 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 and 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;
3. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within
50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or
the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401/Wetiands Unit
web site at http://h2o.enr.state.nc.us/ncwetlands ;
4. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification
has been completed.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days
of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina
General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its
conditions are final and binding unless you ask for a hearing.
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Watef Act. If you have any
questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly in the Central Office in
Raleigh 919-733-9721. Questions regarding stormwater requirements should be directed to Todd St. John in the Central Office at 919-
733-9584.
Sincerely,
C9"-A,
0,4
?r Alan W. Klimek, P.E.
AW K/cbk
Attachments
cc: Corps of Engineers Asheville Regulatory Field Office
Mooresville DWQ Regional Office
Central Files
File Copy
Len Rindner, 3714 Spokeshave Lane, Matthews, NC, 28105
021204
LEONARD S. RWDNER PWS 3714 Spokeshave Lane
Environmental Planning Consultant Matthews, NC 28105
Professional Wetland Scientist Tele• [phone]
Land Planning Fax [phone]
July 5, 2003
Mr. Todd St. John UP,
Division of Water Quality - NCDENR
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: NorthLake Village - DWQ Project #02-1204
02-
Dear Todd:
On behalf of my client, Mr. Coy Shields of Faison Properties, I am requesting a
modification to the 401 Water Quality Certification for the proposed project. In general,
we are requesting the ability to phase the submittal and implementation of the stormwater
management plan for the commercial development of the project as required in the 401
WQC. At this time the actual layout of the commercial area - A as depicted on the
attached map has not been designed and will be developed and designed by a different
firm than commercial area -B. The land plan and stormwater management plan for "A"
is being designed by LandDesign, Inc. in Charlotte, North Carolina. The land plan and
stormwater management plan for "B" is currently being designed by Walter Phillips, Inc.,
Falls Church, Virginia.
As manifested by our meeting with you on June 10, 2003, both firms are working closely
with each other to make sure the overall requirements of the 401 Water Quality
Certification are met, however the timing of the design, planning, financial commitments,
and construction are different from each other. The layout on the attached plan that was
submitted with the permit application was illustrative for planning and zoning purposes.
The design of commercial area "B" is much further along and the engineers for the
project are in the process of finalizing the written stormwater management plan,
specification, and details, for your approval based on your review and comments from
our meeting on June 10, 2003. We are requesting the ability to have the stormwater
management plan for area "B" be approved prior to Area "A", so that construction on
area "B" can begin immediately based on your approval.
Any stormwater management plan design for commercial area "A" would be fictitious
and would need to be revised based on a final layout. However, a stormwater
management plan will be submitted for "A" when a land plan is developed. At this time
there is no definitive schedule for commercial area "A". However, Faison Properties
Mr. Todd St. John, July 5, 2003
Page 2
proposes to submit a schedule for submittal of the stormwater management plan,
immediately upon beginning actual planning for commercial area "A".
The stormwater management plan will include plans and specifications for stormwater
management facilities designed to remove 85% TSS according to the most recent version
of NCDENR Stormwater Best Management Practices Manual. Since the project is within
one mile of a 303d listed stream (Long Creek), the designs for "A" and "B" will
incorporate extended detention stormwater wetlands and bio-retention as discussed in our
meeting.
Please contact me if you have any questions or require additional explanation. Thank you
for your consideration.
Unard S. Rindner, PWS
Environmental Planning Consultant
Professional Wetland Scientist
Cc: Mr. Alan Johnson - NCDENR - Division of Water Quality
Mr. Jeff Stuchel - Walter Phillips, Inc.
Mr. Kevin Vogel - LandDesign, Inc.
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1AL AREA '•A..
' COMMlE=
'o a ! STREAM EVALUATED BY S.CHAPIN (USAGE)
P.COLWELL, M.PARKER (NCDWQ) OMERALL SITE PERMITTING PLAN
1't ti
1- ._ .? •. I ._._ _ .__?./• - ?:aL 1 S.luv 71 A Ll Citfxi"J I IB11 ^W
l
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ATEq
U(It
-c
Vlltitem G. Ross Jr., Secretary
North Carolina Dep uftnent of lEnviroriinerit and Natural Resources
Alen w. Kfsnelc, P.E. Director
Division of Water Quality
4
July 31, 2002
DWQ# 02-1204
Mecklenburg County
Mr. Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC, 28202
APPROVAL of 401 Water Quality Certification with Additional Conditions
Dear Mr. Shields:
You have our approval, In accordance with the attached conditions, to place fill! in 2,000 dnear feet of intermittent streams in order to
Center in Mecklenburg County, as described in your application received by the Division of
constrict the Northl_alce Village Shopping
Water Quality on July 31, 2002. After reviewing your application, we have determined that this fill Is covered by General Water Quality
Certification Number 3362, which can be viewed on our web site at htb!/h2o lair-stele nc.us/rtcwetlands. This Certification allows you to
use Nationwide Permit Number 39 when it Is Issued by the U.S. Army Corps of Engineers. In addition, you should get'any other federal,
state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge
and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise
specified in the General Certification.
This approval is only veld for the purpose and design that you described In your application. If you cludw your project, You must
notify us in writing and you may be required to send us a new application for a new certification. If the property Is sold, the new owner -
must be given a copy of the Certification and approval letter and is thereby responslible for complying with ad conditions. If total wetland
fills for Oils project (now or in the future) exceed one acre, compensatory mitigation may be required as descrtred in 15A NCAC 2H.0606
(h). For this approval to be valid, you must follow the conditions fisted In the attached certification, as weft as the additional condition
listed below:
1. An additional condition is that a final, written stormwater management plan incorporating a s ormwater treatment wetland shall be
approved in writing by this Office before the impacts specified in this Certllication occur. The auwnuraW management plan must
Include plans and specifications for stomiwater management facilMm designed to remove 85% TSS according to the most recent
version of the NC DENR Stomiwater Best Management Pmcdm Manual. Also, before any permanent buikftrr9 is occupied at the
subject site, the facddies, as approved by this Office, shad be coneftucted and operational, and the stonnwater management plan, as
approved by this Office, shall be impiemented. The structural stormwater practices and wed as drainage patterns must be maintained
In perpetuity. No changes to the structural stormwater practices shad be made without written audw tzWdon from the Division of
Water Quality;
2. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within
50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or
o the Issuance of the 404 Permit (whichever is later).' A sample deed notification format can be downloaded from the 401/Wetiands Unit
web site at htto://h2o.enrstate.no.us/noyetlande ;
3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification
has been completed.
If you do not accept any of the conditions of this certification, you may ask for an adjudloatory. hearing. You must act within 60 days
of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the NOMW Cdiolina
General Statutes to the Office of Administrative Hearings, 6714 Mail ServiceCenter, Raleigh, N.C. 27699-6714. This certifictition alyt its
conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any
questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoy in the Central Office In
Raleigh 919-733-9721. Questions regarding stormwater requirements should be directed to Todd St. John in the Central Office at 919-
733-9584_
Y,
IV "4
!&Kkelc, P.E.
N. C nMginn of WAtPr nnailty 1617 Mail RArvir;a Centar Rfilainh. NC 27RCM-1617
(AIM 3A-7n1fi
NMENR
Cumamer Servina
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action Id. 200231172 County Mecklenburg
GENERAL PERM[T (REGIONAL AND NATIONWIDE) VERIFICATION
Property owner. Faison Properties, Att'n: Mr. Coy Shields
Address: 121 West Trade St., Suite 1900
Charlotte, NC 28202
Telephone No.:
Size and Location of project (water body, road nametnumber, town, etc.):
NorthLake Village development located on approx. 142 acre tract just west of I-77 (Exit #18);
S.W. of Huntersville.
Description of Activity:
Impact approx. 2,000 LF of unnamed tributary to Dixon Branch (1,900 LF determined to
have "unimportant" aquatic function) and 028 acre of wetlands for the purpose of
accommodating the construction of a mall, retail stores, and office center. Mitigation to offset
loss of aquatic resources will be accomplished through construction of at least 0.6 acre of
wetlands in the Dixon Branch floodplain.
SPECIAL CONDITION: A report outlining the success of the mitigation will be submitted to
this office within one year of the date of this permit. In addition, all proposed construction
work will be accomplished in accordance with submitted plans.
Applicable Law: -2L-Section 404 (Clean Water Act, 33 U.S.C.1344).
(check all that apply) Section 10 (River and Harbor Act of 1899).
Authorization: Regional General Permit Number.
39 Nationwide Permit Number.
General (RGP) or Nationwide Permit (NWP) provided it is
Your work is authorized by this dffi shed conditions and your submitted plans. If your activi f"'1s
accomplished in strict sce also receive a
subject to Section 404 (if Section 404 block above is checked before beginning work you must st a
Section 401 water quality ceitiScation from the N.C. Division of Environmental Management, telephone (919)
733-1786. For any activity within the twenty coastal counties, before beginning work you must contact the N.C.
Division of Coastal Management, telephone [phone].
Please read and carefully comply with the attached conditions of the RGP or NWP. Any violation of the
conditions of the RGP or the NWP referenced above may subject the permittee to a stop work order, a restoration
order, and/or appropriate legal action.
This Department of the Army RGP or NWP verification does not relieve the permittee of the responsibility to
obtain any other required Federal, State, or local approvals/permits. The permittee may need to contact appropriate
State and local agencies before beginning work.
Ifthere are any questions regarding this authorization or any ofthe conditions ofthe General Permit orNationwide l
Permitf please contact the Corps Regulatory Official specified below.
Date Augast 26.20022
Corps Regulatory Official Steve C Telephone No.-i8281271-7980
hain
Expiration Date of Verification A*mW 26.2004
cc: Mr. Leonard S. Rindner
CBSAW Form 591
RwbW My 1995

IF
3
LEONARD S. RINDNER. PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
FAX COVER LETTER
?
Q -14/ Send To Fax Number : -1 141 10 (29& Date : 0
To: TOA ot 4c-? . jok 1^
From : t
Plr*A?
lift I*- k4o 6-&s!!&*k
J wi? O
bwa A
Remarks/Message: OZ - Mo&t
of*
Copy: From :
LEONARD S. RINDNER, PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax[phone]
July 5, 2003
Mr. Todd St. John
Division of Water Quality - NCDENR
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: NorthLake Village - DWQ Project #02-1204
Dear Todd:
'16 ANDS/401 UnVC

*4TERWALIIYl
On behalf of my client, Mr. Coy Shields of Faison Properties, I am requesting a
modification to the 401 Water Quality Certification for the proposed project. In general,
we are requesting the ability to phase the submittal and implementation of the stormwater
management plan for the commercial development of the project as required in the 401
WQC. At this time the actual layout of the commercial area - A as depicted on the
attached map has not been designed and will be developed and designed by a different
firm than commercial area -B. The land plan and stormwater management plan for "A"
is being designed by LandDesign, Inc. in Charlotte, North Carolina. The land plan and
stormwater management plan for "B" is currently being designed by Walter Phillips, Inc.,
Falls Church, Virginia.
As manifested by our meeting with you on June 10, 2003, both firms are working closely
with each other to make sure the overall requirements of the 401 Water Quality
Certification are met, however the timing of the design, planning, financial commitments,
and construction are different from each other. The layout on the attached plan that was
submitted with the permit application was illustrative for planning and zoning purposes.
The design of commercial area "B" is much further along and the engineers for the
project are in the process of finalizing the written stormwater management plan,
specification, and details, for your approval based on your review and comments from
our meeting on June 10, 2003. We are requesting the ability to have the stormwater
management plan for area "B" be approved prior to Area "A", so that construction on
area "B" can begin immediately based on your approval.
Any stormwater management plan design for commercial area "A" would be fictitious
and would need to be revised based on a final layout. However, a stormwater
management plan will be submitted for "A" when a land plan is developed. At this time
there is no definitive schedule for commercial area "A". However, Faison Properties
Mr. Todd St. John, July 5, 2003
Page 2
proposes to submit a schedule for submittal of the stormwater management plan,
immediately upon beginning actual planning for commercial area "A".
The stormwater management plan will include plans and specifications for stormwater
management facilities designed to remove 85% TSS according to the most recent version
of NCDENR Stormwater Best Management Practices Manual. Since the project is within
one mile of a 303d listed stream (Long Creek), the designs for "A" and "B" will
incorporate extended detention stormwater wetlands and bio-retention as discussed in our
meeting.
Please contact me if you have any questions or require additional explanation. Thank you
for your consideration.
hard S. Rindner, PWS
Environmental Planning Consultant
Professional Wetland Scientist
Cc: Mr. Alan Johnson - NCDENR - Division of Water Quality
Mr. Jeff Stuchel - Walter Phillips, Inc.
Mr. Kevin Vogel - LandDesign, Inc.

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in
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action Id. 200231172
County Mecklenburg
GENERAL. PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property owner. Faison Properties, Attn: Mr. Coy Shields
Address: 121 West Trade St., Suite 1900
Charlotte, NC 28202
Telephone No.:
Size and Location of project (water body, road name/number, town, etc.):
NorthLake Village development located on approx. 142 acre tract just west of I-77 (Exit #18);
S.W. of Huntersville.
Description of Activity:
Impact approx. 2,000 LF of unnamed tributary to Dixon Branch (1,900 LF determined to
have "unimportant" aquatic function) and 028 acre of wetlands for the purpose of
accommodating the construction of a mall, retail stores, and office center. Mitigation to offset
loss of aquatic resources will be accomplished through construction of at least 0.6 acre of
wetlands in the Dixon Branch fioodplain.
SPECIAL CONDITION: A report outlining the success of the mitigation will be submitted to
this office within one year of the date of this permit. In addition, all proposed construction
work will be accomplished in accordance with submitted plans.
Applicable Law: X Section 404 (Clean water Act, 33 U.S.C.1344).
(check all that apply) Section 10 (River and Harbor Act of 1899).
Authorization: Regional General Permit Number.
39 Nationwide Permit Number.
Your work is authorized by this Regional General (RGP) or Nationwide Permit (NWP) provided it is
accomplished in strict accordance with'ihe attached conditions and your submitted plans- If your activi is
subject to Section 404 (if Section 404 block above is checked}, before beginning work You must also receive a
Section 401 water quality certification from the N.C. Division of Environmental Management, telephone (919)
733-1786. For any activity within the twenty coastal counties, before beginning work you must contact the N.C.
Division of Coastal Management, telephone [phone].
Please read and carefully comply with the attached conditions of the RGP or NWP. Any violation of the
conditions of the RGP or the NWP referenced above may subject the permittee to a stop work order, a restoration
order, and/or appropriate legal action.
This Department of the Army RGP or NWP verification does not relieve the permittee of the responsibility to
obtain any other required Federal, State, or local approvals/permits. The pennittee may need to contact appropriate
State and local agencies before beginning work.
4
Ifthere are any questions regarding this authorization or any ofthe conditions ofthe General Permit or Nationwide
Permits please contact the Corps Regulatory Official specified below.
Date ANOM 26.2002
Corps Regulatory Official Steve Chapin Telephone No-_L=1.271-7980
Expiration Date of Verification Aesast 26.2404
cc: Mr. Leonard S. Rindner
CUAW Form 591
RrAwd hd91995

e
C.

t,
LEONARD S. RINDNER. PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
FAX COVER LETTERQ ` /?
Send To Fax Number : -1141 10 (o" Date : ?+?
To: Too( st s-? . jok V%
From : ?`-a`-"?- 1?^A?
Reference: ?jft+-o*-kA0 ?C.0(
Remarks/Message: OZ - O
of*
Copy: From :
Jul 06 03 01:30p Leonard Rindner 704 847 0185 p.l
LEONARD S. RINDNER, PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
FAX COVER LETTER
Send To Fax Number : 911 IjA Date
To: T044,94 1 ? . ok r
From :
Reference:
Remarks/Message:

D
02, -ILo'}
4l? •
j
Copy: From :
Jul 06 03 01:31p Leonard Rindner 704 847 01B5 p.2
LEONARD S. RINDNER, PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 2810.5
Land Planning Tcle: [phone]
Fax [phone]
July 5, 2003
Mr. Todd St. John
Division of Water Quality - NCDENR
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Re: North Lake Village - DWQ Project 402-1204
Dear Todd:
On behalf of my client, Mr. Coy Shields of Faison Properties, I am requesting a
modification to the 401 Water Quality Certification for the proposed project. In general,
we are requesting the ability to phase the submittal and implementation of the stormwater
management plan for the commercial development of the proiect as required in the 401
WQC'. At this time the actual layout of the commercial area - A as depicted on the
attached map has not been designed and will be developed and designed by a different
firm than commercial area -B. The land plan and stormwater management plan for "A"
is being designed by LandDesign, Inc. in Charlotte, North Carolina. The land plan and
stormwater management plan for "B" is currently being designed by Waller Phillips. Inc.,
Falls Church, Virginia.
As manifested by our meeting with you on June 10. 2003, both firms are working closely
with each other to make sure the overall requirements of the 401 Water Quality
Certification are met, however the timing of the design, planning, financial commitments.
and construction are different from each other. The layout on the attached plan that. was
submitted with the permit application was illustrative for planning and zoning purposes.
The design of commercial area "B" is much further along and the engineers for the
project are in the process of finalizing the written stormwater management plan,
specification, and details, for your approval based on your review and comments Iron
our meeting on June 10, 2003. We are requesting the ability to have the stot7il titer
management plan for area "B" be approved prior to Area "A", so that construction on
area "B" can begin immediately based on your approval.
Any stormwater management plan design for commercial area "A" would be fictitious
and would need to be revised based on a final layout. However, a stormwater
management plan will be submitted far "A" when a land plan is developed. At this time
there is no definitive schedule for commercial area "A". However, Faison Properties
Jul 06 03 01:31p Leonard Rindner 704 847 0185 p.3
Mr. Todd St. John, July 5, 2003
Page'?
proposes to submit a schedule for submittal of the stormwater management plan.
immediately upon beginning actual planning for commercial area "A".
The stormwater management plan will include plans and specifications for stormwater
management facilities designed to remove 85% TSS according to the most recent version
of NCDENR Stormwater Best Management Practices Manual. Since the project is within
one mile of a 303d listed stream (Long Creek), the designs for "A" and " B" will
incorporate extended detention stormwater wetlands and bio-retention as discussed in our
mecting.
Please contact me if you have any questions or require additional explanation. 'thank you
for your consideration.
Si
'fo6nard S. Rindner, PWS
Environmental Planning Consultant
Professional Wetland Scientist
Cc: Mr. Alan Johnson - NCDENR - Division of Water Quality
Mr..leff Stuchel - Walter Phillips, Inc.
Mr. Kevin Vogel - LandDesign, Inc.
ccc 'i , , I Try
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COMMEFtCIAL AREA B
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''Q r?'?oiyy.?'l tI'• 4E- 'X?•_ y ?,:? i t I. •cw ,.,,. "ct __ f /1, f.-\ 't }. z} 1(?? rl•may, I
t AREA
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:}j{ n ,,s yr I€ fit{ p ? tF D BY S.CHAPIN
I f it r ff''?? _ N t (t OVERALL SITE PERMITTING PLAN
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Jul 06 03 01:33p Leonard Rindner 704 847 0185 p.5
ldchaei F. Easley. Governor
w A r? William G. Ross Jr.. Secretary
?? RQ North Carolina oepartment of Environment and Natural Resources
Alan W. Klimek. P.E. Director
Division of Water Quality
? -i
Y
rsw;;`s July 31, 2002
DWQ# 02-1204
Mecklenburg County
Mr. Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC, 28202
APPROVAL of 401 Water ('Quality Certification with Additional Conditions
Dear Mr. Shields:
You have our approval, in accordance with the attached conditions, to place fill in 2,000 linear feet of intermittent streams in order to
construct the NorthLake Village Shopping Center in Mecklenburg County, as described in your application received by the Division of
Water Quality on July 31, 2002. After reviewing your application, we have determined that this rill is covered by General Water Quality
Certification Number 3362, which can be viewed on our web site at httpJltt2o enr state. nc_us/ncwetlands. This Certification allows you to
use Nationwide Permit Number 39 when it is issued by the U.S. Army Corps of Engineers. In addition, you should get-any other federal,
state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge
and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise
specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application. If you change your project, you must
notify us in writing and you may be required to send us a new application for a new certificatione 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. If total wetland
fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H.0506
(h). For this approval to be valid, you must follow the conditions listed In the attached certification, as well as the additional condition
listed below:
1. An additional condition is that a final, written stormwater management plan incorporating a stormwater treatment wetiand shall be
approved in writing by this Office before the impacts specified in this Certification occur. The stormwater management plan must
include plans and specifications for stormwater management facilities designed to remove 85% TSS according to the most recent
version of the NC DENR Stormwater Best Management Practices Manual. 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 and 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;
2. Deed notifications or similar mechanisms shall be placed on all lots with remaining Jurisdictional wetlands and waters or areas within
50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or
the issuance of the 404 Permit (whichever is later).' A sample deed notification format can be downloaded from the 401 /Wetlands Unit
web site at htlp•//h2o enr state.nc.us/ncwetlands ;
3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification
has been completed.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must ac' , within 60 days
of the date that you receive this letter. To ask for a h6aring, send a written petition which conforms to Chapter 150B of the „ Carolina
General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certifi.;:ation ar,d its
conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any
questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly In the Central Office in
Raleigh 919-733-9721. Questions regarding stormwater requirements should be directed to Todd St. John in the Central Office at 919-
733-9564.
Since
CVVA rely, U
/1 CfiLL
/11" Alan Klimek, P.E.
N. r, nivicinn M Water Oisnlity IS17 MAH Swrvirw Crintar RAleiah. NC 77ACP-1817 x9191 73R-7n1Ei
;;ire r:sEt,l z
Customer Servira
Jul 06 03 01:35p Leonard Rindner 704 847 0185
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action Id. 200231172 County Mecklenburg
GENERAL, PERMIT (REGIONAL AND NATIONWIDE) VERIFICA'T'ION
Property owner: Faison Properties, Attn: Mr. Coy Shields
Address: 121 West Trade St., Suite 1900
Charlotte, NC 28202
P.6
Telephone No.:
Size and Location of project (water body, road name/number, town, etc.):
NortbLake Village development located on approx. 142 acre tract just west of 1-77 (Exit #18);
S.W. of Huntcrsville.
Description of Activity:
Impact approx. 2,000 LF of unnamed tributary to Dixon Branch (1,900 LF determined to
have "unimportant" aquatic function) and 028 acre of wetlands for the purpose of
accommodating the construction of a mall, retail stores, and office center. Mitigation to offset
loss of aquatic resources will be accomplished through construction of at least 0.6 acre of
wetlands in the Dixon Branch floodplain.
SPECIAL CONDITION: A report outlining the success of the mitigation will be submitted to
this office within one year of the date of this permit. In addition, all proposed construction
work will be accomplished in accordance with submitted plans.
Applicable Law: __X _Section 404 (Clean Water Act, 33 U.S.C.1344).
(check all that apply) Section 10 (River and Harbor Act of 1899).
Authorization: Regional General Permit Number.
9 Nationwide Permit Number.
3r
Your work is authorized by this Regional General (RGP) or Nationwide Permit (NWP) provided it is
accomplished in strict accordance with the attached conditions and your submitted plans. If your activsvy ss
subject to Section 404 (if Section 404 block above is checked before beginning work you must also receive a
Section 401 water quality certification from the N.C. Division of Environmental Management, telephone (919)
733-1786. For any activity within the twenty coastal counties, before beginning work you must contact the N.C.
Division of Coastal Management, telephone [phone].
Please read and carefully lthe NWP referenced above may subject the permittee to asst p work Any orderlat
conditions of the R restoration
order, and/or appropriate legal action.
This Department of the Army RGP or NWP verification does not relieve the permittee of the responsibility to
obtain any other required Federal, State, or local approvalstpermits. Tire permittee may need to contact appropriate
State and local agencies before beginning work.
Jul 06 03 01:35p Leonard Rindner 704 847 0185 p.7
If there are any questions regarding this authorization or any ofthe conditions ofthe General Permit orNationwide
Permit, please contact the Corps Regulatory Official specified below.
Date August 26, 2002
Corps Regulatory official^ Steve C>hanin Telephone No._Q 281271-7980
Expiration Date of Verification AHMust 26,_2004
cc: Mr. Leonard S. Rindner
CFSAW Form 591
Rcvisa MY 1995
0
0 North Carolina Wildlife Resources Commission
Charles R. 1`1111wood, FAccutivc Director
MEMORANDUM
TO: John R. Dorney, Division of Water Quality
Dept. of Environment and Natural Resources
FROM: Ron Linville, Regional Coordinato
Habitat Conservation Program
DATE: August 9, 2002
SUBJECT: Review of 401 Certification Application, NorthLake Village, Unnamed
Tributary Dixon Branch, Mecklenburg County
Mr. Coy Shields is requesting 401 Water Quality Certification from the North Carolina
Division of Water Quality. The NCWRC has reviewed information provided by the
applicant, and field biologists on our staff are familiar with habitat values of the project
area. These comments are provided in accordance with provisions of the Clean Water
Act of 1977 (33 U.S.C. 466 et. seq.) and the Fish and Wildlife Coordination Act (48 Stat.
401, as amended; 16 U.S.C. 661-667d).
We have reviewed the submittal provided by Mr. Len Rindner. We do not object to the
project as proposed based on the provision of stormwater management and the habitat
preservation indicated.
We continue to be concerned that impacts to waters and habitats are not minimized to the
maximum extent practicable due to typical parking lot and tree island standards.
Maximizing preservation of naturally vegetated, undisturbed drainage areas could further
reduce impervious area and associated impacts to waters from large developments. This
could be accomplished by reducing the number of tree islands and/or parking spaces.
Such measures should improve site aesthetics, preserve additional buffer habitats, and
further enhance post development stormwater issues.
Thank you for the opportunity to review and comment on this project. If you have any
questions regarding these comments, please contact me at 336/769-9453.
Mailing Address: Division of Inland Fishcrics • 1721 Mail Scrvice Center • Raleigh, NC 27699-1721
Telephone: [phone] cm. 281 • Fax: [phone]

VdArF Michael F. Easley, Governor
\O?0 ROG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
co r Alan W. Klimek, P.E. Director
Division of Water Quality
July 31, 2002
DW Q# 02-1204
Mecklenburg County
Mr. Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC, 28202
APPROVAL of 401 Water Quality Certification with Additional Conditions
Dear Mr. Shields:
You have our approval, in accordance with the attached conditions, to place fill in 2,000 linear feet of intermittent streams in order to
construct the NorthLake Village Shopping Center in Mecklenburg County, as described in your application received by the Division of
Water Quality on July 31, 2002. After reviewing your application, we have determined that this fill is covered by General Water Quality
Certification Number 3362, which can be viewed on our web site at http://h2o.enr.state.nc.us/ncwetlands. This Certification allows you to
use Nationwide Permit Number 39 when it is issued by the U.S. Army Corps of Engineers. In addition, you should get any other federal,
state or local permits before you go ahead with your project including (but not limited to) Sediment and Erosion Control, Non-Discharge
and Water Supply Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise
specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application. If you change your project, you must
notify us in writing and you may be required to send us a new application for a new certification. 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. If total wetland
fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506
(h). For this approval to be valid, you must follow the conditions listed in the attached certification, as well as the additional condition
listed below:
An additional condition is that a final, written stormwater management plan incorporating a stormwater treatment wetland shall be
approved in writing by this Office before the impacts specified in this Certification occur. The stormwater management plan must
include plans and specifications for stormwater management facilities designed to remove 85% TSS according to the most recent
version of the NC DENR Stormwater Best Management Practices Manual. 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 and 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;
2. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within
50 feet of all streams and ponds on the property. These mechanisms shall be put in place within 30 days of the date of this letter or
the issuance of the 404 Permit (whichever is later). A sample deed notification format can be downloaded from the 401 /Wetlands Unit
web site at http://h2o.enr.state.nc.us/ncwetlands ;
3. You are required to return the attached Certification of Completion form to notify DWQ when all work included in the 401 Certification
has been completed.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days
of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina
General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its
conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any
questions, please telephone Mike Parker in our Mooresville Regional Office at 704-663-1699 or Cyndi Karoly in the Central Office in
Raleigh 919-733-9721. Questions regarding stormwater requirements should be directed to Todd St. John in the Central Office at 919-
733-9584.
Sincerely, J?
G/Alan .Klimek, P.E.
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748
AW K/cbk
Attachments
cc: Corps of Engineers Asheville Regulatory Field Office
Mooresville DWQ Regional Office
Central Files
File Copy
Len Rindner, 3714 Spokeshave Lane, Matthews, NC, 28105
021204
,f
.0212
NorthLake Village
Charlotte, North Carolina
Joint Application Form and Supporting Documentation for
A-

NATIONWIDE PERMITS THAT REQUIRE NOTIFICATION
TO CORPS OF ENGINEERS
NATIONWIDE PERMITS THAT REQUIRE
SECTION 401 CERTIFICATION CONCURRENCE
Prepared For.
Mn Coy Shields
Faison Properties
121 West Trade Street, Suite 1900
Charlotte, NC 28202
Prepared By:
Leonard S. Rindner, PWS
Environmental Planning Consultant
3714 Spokeshave Lane
Matthews, NC 28105
[phone]
11\1-1 *Subject to verification by the USACE and NCDWQ
\?o-
,\?Rb

0
-46

.f 3p
ARX Date : 7/2002
-CIS
. 4 y
Office Use Only, Form Version April 2001
USACE Action ID No. DWQ No.
If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than
leaving the space blank.
L Processing
1. Check all of the approval(s) requested for this project:
Section 404 Permit
? Section 10 Permit
401 Water Quality Certification
? Riparian or Watershed Buffer Rules
2. Nationwide, Regional or General Permit Number(s) Requested:
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ?
4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (see section VIII - Mitigation), check here: ?
H. Applicant Information
2
1. Owner/Applicant Information T e k7) s,
Name:
Mailing Address:--
Telephone Number: "Y b-1. 2`7 7 'L 212 Fax Number:
E-mail Address:
Agent Information (A signed and dated copy of the Agent Authorization letter must be
attached if the Agent has signatory authority for the owner/applicant.)
f'? ??V `t,i? e,?SG?i? TV J ('`+'
Name:
? r
Company Affiliation:
Mailing Address:
177
Pi°pnori Null er: " -` Fa,;. Number:
r.. -; ,. .." t
I_
M. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
Name of project:

2. T.I.P. Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN):
4. Location / ,?
County: 1?rs,vA Nearest Town: ??/ E? -
Subdivision name (include ph a/lot number):
D' ions to site (include road umbers, landmarks, etc.):
r
%frv l ??
Site coordinates, if available (UTM or Lat/Long): /Q1
(Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the
coordinates for each crossing of a distinct waterbody.)
6. De?cri?e thee, existing land use or condition of the site at the time of this application:
7. Property size (acres):
8. Nearest body of water (streamiriver/sound/ocean/lake)
cl. River Basin:
c Note - thi:: rr usr 6cJ onz of Norte; CaroiinZ'., seventeer. designated. major rive- basin.,. tie
River Basir, maL, is available at httz://r ?:.ens.st:at..nc. siadmir:/rya s/.
T.n.,c_ .. _- 7"
10. Describe the purpose of the
IV.

11. ist the type of aqui ment to be used o c?nstru the ProJ'ect:.
12. Deg c? e the land use in tie vicinity of this project: P`' 7 -7
Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where' applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.

V.
Future Project Plans
pr-f r
JI
,l
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a.
delineation map, whether or not impacts are proposed to these systems. Wetiand and stream
evaluation and delineation forms should be inciuded as appropriate. Photographs may be
inciuaed at tix:: appiicant`s aiscretior. If this proposed. impact is strictiy for wetland or stream
minuatio _,, iiS = descrih?- th impac in Section V112' lae ow. F` additional s.nar-- is need-:d RITT
f;.stin<' or at-scrfntior, pims° atta.wf, a s-,para._ t sd,
F i„"?w_.

Are any additional permit requests anticipated for this project in the future? If so, describe the
anticipated work, and provide justification for the exclusion of this work from the current

1. Wetland Impacts
Wetland Impact
Site Number
(indicate on imp)
Type of Impact* Area of
Impact
(acres Located within
100 year Floodplain**
es/no Distance to
Nearest Stream
linear feet
Type of Wetland***
U)r-

LI5L cacn nnpact separately ana memory temporary impacts. impacts mcitiae, but are not imtutea to: mecnam= ciearuig, graamg, taut,
excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding.
** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rene Maps
(FIRK, or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or
online athi!p://www.fem&go v.
**• List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.) y-7 ?Y4 `
List the total acreage (estimated) of existing we ands on the property:
Total area of wetland impact proposed: '0
2. Stream Impacts, including all intermittent and perennial streams
Stream Impact
Site Number
(indicate on ma
Type of Impact* Length of
Impact
(linear feet
Stream Name** Average Width
of Stream
Before Im ct Perennial or
Intermittent?
lease

Lmsi cacn impact separateiy ana iaenuty temporary impacts. impacts include, but are not limited to: culverts and associate rip-rap,
dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain),
stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is
proposed., plans and profiles showing the linear footprint for both the original and relocated streams must be included.
Stream names can he found on USGS topographic maps. If a stream has no name, list as UT (urmamed tributary) to the nearest
downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at
,%Ananv.usas.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com,
www.maaguest.com, etc.).

Cumulative impacts f linear distance in.. feet) to a.h stream-z or site ? w
Li., Rom„ ... n=• S'
3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any
other Water of the U.S,
Open Water Impact
Site Number
indicate on ma
Type of Impact* Area of
Impact
(acres) Name
Wate)
( applicable) Type of Waterbody
(lake, pond, estuary, sound,
bay, mean, etc.

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging,
flooding, drainage, bulkheads, etc.
4. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
C J I? )? ?..-"?
?:?.F!`• ?T t `% ?/ilJ'^ ?!3l./ -?',' r-??,? a ? r"-- r K ???r"' f d,'k
,,,{

?
-
..?
l /"V)

1

G'.,.r. _r ?'1
VM. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.ne.us/ncwetlands/strmgide.html.
Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
T>-. ,, ;_ ,.. .
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that
you would like to pay into the NCWRP. Please note that payment into the NCWRP must be
reviewed and approved before it can be used to satisfy mitigation requirements. Applicants
will be notified early in the review process by the 401/Wetlands Unit if payment into the
NCWRP is available as an option. For additional information regarding the application
process for the NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/wrn/index.htm. If
use of the NCWRP is proposed, please check the appropriate box on page three and provide
the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
IX. Environmental Documentation (DWQ Only)
Does the project involve an expenditure of public funds or the use of public (federal/state/local)
land?
Yes ? No
If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ? No ?
If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a
copy of the NEPA or SEPA final approval letter.
Yes ? No ?
X. Proposes! Impacts on Riparian and Watershed Buffers (DWQ Only) 1A( 011X4-
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VTI above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ}
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
Will the projJe t impact Protected ripariar buffers identifted within 15,k NCAC 2E .0233y
(Meuse', 15A NCA 2i 025 `'A NCAC 2E .0250 (Rardiemar Mules and
Fate. Sun, iv 5,
"es t?j?; { IT von' ansivered es", provide thf llov7tstg tnfo-xx? ttor.:
- G
Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer
mitigation is required calculate the required amount of mitigation by applying the buffer
multipliers.
- Zone* Impact
(square feet Multiplier Required
h iti tion
1 3
2 1.5
Total
Z?Vuv I cA ZLLU7 vut au L= PCrPenuict lar II'mn near DM oI Channel; Gone 2 extends an
additional 20 feet from the edge of Zone 1.
if buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 2B .0242 or.0260.
XL Stormwater (DWQ Only)
Describe impervious acreage (both existing and proposed) versus total acreage on the site.
Discuss stormwater controls proposed in order to protect surface waters and wetlands
XII.
Clearly detail the ultimate treatment methods an& disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
XIIIL Violations (DWQ" Only)
Is this site in violation of DW9"Vetland Rules (15 NCAC 2P. .0500) or any Buffer Rules?
Yes 7, No 7
Is this ar, after-the-fact
s ].?
T-'- d h -, '. ,
Sewage Disposal (DWQ Only)
Jul 28 02 08;46p Leonard Rindner 704 047 0155 p.2
M. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits, However, an applicant tray
choose to list constraints associated with owstruction or sequencing that may impose limits on
work schedules (e.g., draw-doom schedules for lakes, data associated with Endangcred and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
r 7Z O
Applicant/Agenfs S D e
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
US Army Corps Of Engineers Field Oftes and County CovenW
Asheville Asplatory Field Once AleXandar Cherokee 1100011 Mitchell U1004
US Army Corp orEngk=n Avery Clay WWI Polk Ws+tattga
151 Patton Axone Buncornk Clcvtiand Lincoln Rowan yanecy
Room 208 Burkc Gaston Maoo4 R4thwd lard
Ashtvilley NC 28801-5006 Cah ums Graham Madison Stanley
Telephone: (M)27)-4854 Caldwell Haywood bfGV#WC4 Swain
Fax: [phone] Catawba HmWkrson Modkieabarg Transylvania
Raldo Regulatory Field Office Alamom Durham ];bum Raddaglram Wilson
US Amy Corp Of Engineers Allegheny F mba Lee stakes Yadkin
6508 Falls of the Nence Road Ashe Franklin Nash Stray
Suite 120 Caswell Forsyth Northampon vane
Raleigh, NC 27615 Charharn Granville Orange Wake
Tckphonc: [phone] Davidson Guilford Fellon Warren
Fax: [phone] Davie Halifax Randolpb Willis
Washington Rqp datory Field Office Beaufort Cmritack Jonas Pitt
US Army Corps Of Engineers Berrie Dare Lenoir 'lyrttll
Post Office Box 1000 Camden Gates Martin Washington
Washington, NC 27889.1000 Cmteret• Green POSSUM Wayne
Tclephoue: [phone] Cbowan Hertford Pasqualook
Fare: [phone] Craven Hyde Paqumaw rCmatanNational Forcg Only
Wilmington Replatory Field Officc Anson Duplin ondaw
US Army Corp Of EIV;i9em Bkft Haraza PeRder
Pmu Office Box 1990 BrrmswicL Hoke Richmond
Wilminsim. NC 28402-1890 Cart=[ Montgomery Rabason
Tclcphonw; [phone] Columbus mom Sampm
ft-Z (910) 251,4025 Cumbcrlarid Ncw R mvcr ESootland
TA.w ... 13 of t `A
J? } 2E 2W2 20 r?:, 704 ! , SiEFE, n
x- TOTE=,L PAGE. e2 x
LEONARD S. RINDNER. PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28108
Land Planning Tele: [phone]
Fax [phone]
July 28, 2002
Mr. Steve Chapin
US Army Corps of Engineers - Reg. Field Office
151 Patton Avenue - Room 208
Asheville, NC 28801 - 5006
Mr. John R. Dorsey
Division of Water Quality - NCDENR
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
Mr. Mike Parker
NCDENR - Division of Water Quality
919 North Main Street
Mooresville, NC 28115
Re: NorthLake Village, Charlotte, NC - + 142 Acres, Request for NWPI#39
Dear Sirs:
On behalf of my client, Mr. Coy Shields of Faison Properties Inc., I am providing you with the
following information concerning the proposed NorthLake Village. NorthLake Village includes a
mall, retail stores, and offices encompassing 1,424,000 square feet. This area of Charlotte is
experiencing rapid economic development and population growth. The project is in the vicinity of
the intersection of Interstate 485 and Interstate 77. Prior to submitting this application, meetings
were held on-site with the United States Army Corps of Engineers, and Mr. Pete Colwell and Mr.
Mike Parker of NCDWQ to review the intermittent streams and wetland areas on the site. The
Corps of Engineers determined that except for approximately 100 linear feet, the intermittent
stream was unimportant. Both Pete Colwell and Mike Parker agreed that mitigation would not be
required for the stream impacts and indicated that they would recommend stormwater management
and the creation of wetlands when an application was submitted. In order to minimize the impact to
surface waters and wetlands the developer is proposing to protect waters downstream of the project
by meeting or exceeding stormwater treatment requirements. T'hese requirements will include the
creation of extended detention wetlands, stormwater treatment ponds, and other acceptable
practices, as required. In conjunction wetlands will consist of bottomland hardwood, scrub/shrub,
herbaceous, and aquatic wetlands. The wetlands will be a well managed aquatic resource that will
provide habitat for birds, fish, reptiles and amphibians, and benthic macro-invertebrates. These
features are intended to become a significant open space component for the project.
Page 2, July 28, 2002
Site Specific Information
The site is within the headwater drainage area of Dixon Branch, a tributary to Long Creek. The
majority of the site is moderately sloping to steep agricultural land and timbered woodland in
secondary succession.
Vegetation
The forested and scrub/shrub headwater wetland areas are dominated by Facultative, Facultative
Wet and Obligate species. Trees include willow oak, green ash, red maple, black willow, alder,
silky dogwood, spicebush, and sweetgum. Understory and herbaceous strata includes smilax,
microstegium, sedges, soft rush, and others. Herbaceous and scrub/shrub vegetation is more
dominant in areas subject to constant saturation or flooding, and areas in earlier succession.
Soils
Hydric soils are limited to the streambeds and small adjacent wetlands. Monacan soils may have
hydric inclusions according to the Natural Resource Conservation Service, Technical Guide-
Section H-A-2, June 1991.
ydrodogy
Most of the streams were confirmed as having unimagrtant aquatic value by the U.S. Army
Corps of Engineers and the North Carolina Division of Water Quality. Summary of the meetings
with the USACE and the NCDWQ are included in the report.
Summary of Waters of the U.S.
Wetland delineation was conducted to determine the actual extents and surveyed for planning and
study purposes.
Methodology
Preliminary identification and delineation of the Jurisdictional Waters on the site were determined
according to the Corps of Engineers Wetland Delineation Manual, Technical Report Y-87-1, 1987,
with Appendices. Preliminary data gathering included review and interpretation of topographic
maps; USDA Soil Conservation Survey; aerial photographs, and preliminary site visits to selected
areas. Then the Routine On-Site Determination Method was utilized to determine the upper
boundary of the wetlands. ln, order to make a positive wetland determination indicators of
hydrophytic vegetation, hydric soil, and wetland hydrology must be identified as described in. the
manual. The wetland boundary and surface waters were identified in the field by Leonard S.
Rindner, PWS and were reviewed.. and verified. by the USAACE (Steve Chanin). The approved map
has been used for }Manning and potential permitting, purposes.
Page 3, July 28, 2002
Jurisdictional Waters of the U.S and Description
1) Wetland (PFOIA) ±
2) Dixon Branch-Perennial Stream (+ 3,500 If) +
3) Important Intermittent Stream (± 100 If) +
4) Unimportant intermittent Stream (+ 1,900 If) +
0.70 acres
0.67 acres
0.01 acres
0.17 acres
Total Jurisdictional Waters*
+ 1.58 acres
Resu Its of Preliminary Discussions with USA CE and the NCDWQ
Based on preliminary discussions and meetings and a review of alternatives, the USACE and
NCDWQ appear to be supportive of the goals and objectives of the plan, proposed mitigation
measures, and storm water treatment and management concept. The developers are com-nutted to
creating an environmentally responsible project. Minimization and mitigation measures were
developed based on discussions with the United States Army Corps of Engineers and the North
Carolina. Division of Water Quality. The plan and commitments made in this section reflect a
positive response to the preliminary discussions, determinations, and concerns of the regulatory
agencies. Except for temporary construction and development impacts, we believe that the
proposed project with the proposed mitigation will not cause significant cumulative impacts to the
ecological functions or values of Jurisdictional Waters of the United States.
Proposed Impacts
1) Wetland (PFOIA) + 0.30 acres
2) Dixon Branch-Perennial Stream (± 3,500 If) + 0.00 acres
3) Important Intermittent Stream (± 100 If) + 0.01 acres
4) Unimportant intermittent Stream (+ 1,900 If) + 0.17 acres
Total Jurisdictional Waters*
Minimization of Construction Impacts
+ 0.48 acres
The following Best Management Practices will be employed to minimize impacts to Jurisdictional
Waters. These will include:
a) Siltation Barriers; Sediment Traps and Diversion Ditches
b) Project construction will . strictly adhere to an approved Sedimentation and Erosion Control
Plan. Best Management Practices will include utilizing siltation trapping ponds and other erosion
control structures where appropriate. Impacts from hazardous materials and other toxins to fish
and aquatic life- such as fuels will by avoided by not peranitting staging areas to be located near
surface waters.
Page 4, July 28, 2002
MITIGATION PLAN
The mitigation plan is proposed to minimize the loss of stream habitat due to flooding, and provide
for a "no net loss" of aquatic habitat, value, and function to the extent feasible. Extended detention
wetland areas will be incorporated within natural wetland areas. The proposed wetlands will be
created to provide water storage, bank stabilization, pollutant removal, and aquatic resource values
as described in the Fourth Version - Guidance for Rating Values of Wetlands in North Carolina.
The zones will be based on the expected saturation and inundation of the particular zones and
tolerances and include:
Bottomland hardwoods
Scrub/shrub
Emergentlherbaceous
Open water/aquatic zones
These zones adjacent to surface waters will help to improve water quality by filtering runoff,
trapping sediment, absorbing nutrients, and providing wildlife habitat and a food source for aquatic
organisms, herpetofauna, birds, fish and other wildlife. All storm drainage from the site
development must pass through the wetland areas before discharging into the lake. The hydrology
will be supported by storm water runoff, lake level, and captured rainfall. This proposed wetland
mitigation site is expected to be inundated and saturated especially during the winter, early spring,
and major rain events.
The following hydrological zones are expected to occur within the wetland mitigation areas:
- Semi-permanently to permanently: area is inundated or saturated from 75% to 100% of
the growing season.
- Regularly: area is inundated or saturated from 25% to 75% of the growing season.
- Seasonally: area is inundated or saturated from 12.5% to 25% of the growing season.
- Irregularly: area is inundated or saturated from 5% to 12.5% of the growing season.
- Vegetation - The majority of the species utilized will •nnclude Obligate (OBL) and
Facultative Wet (FACW) vegetation. To a lesser extent Facultative (FAC) species known to be
prevalent in wetlands in the local area will be utilized. Vegetation species that provide benefits to
wildlife habitat will be incorporated into the mix of species utilized.
In order to determine the quantity of water available for the mitigation sites system, a
water budget analysis will be performed. Inputs to the system include precipitation, surface runoff
from the site and a4joini% tracts. The objective a- the water management. plan is to provide
periodically saturated and flooded conditions to the created wetland system. Once this is
accomplished the wetland area with appropriate grading should provide a variety of diverse and
suitable wetland habitats. Tti water managemen, plans are an essential part of the overall storm
water management plan;,.
Page 5, July 28, 2002
High and low flows entering the wetland mitigation areas will first dram to a pool or
forebay to reduce velocity and begin distribution. The outlet from the pool will be stabilized with a
rip-rap/gabion structure. To allow a saturated soil development the outlet structure is designed to
withhold at least 12". Water will discharge to the wetland over level spreaders to disperse the flow.
The bottom grades of the proposed wetland will be at a flat gradient of 0 %. Micro-
topographic features such as small drainage ways and hummocks will be designed with the
mitigation cells to disperse and direct flow to create the various hydrological zones. These will
require field review, adjustment, and refinement.
Minor drainage ways and/or level spreaders will diffuse the flow and will distribute water
to various sections of the wetland. Rock/stone filter check dams will be utilized to make minor flow
adjustments within the mitigation cell.
Water control structures will be provided to allow flexibility in depth control, where
necessary. The design of the outfall structures is planned to be as low maintenance and
management as possible. However, if the water depth is greater than anticipated than the outfall
than provisions can be adjusted slightly to allow a lesser volume to be stored.
Data will be collected from field observations in order to record the development of
wetland hydrology, hydric soils, and hydrophytic vegetation as described in the 1987 U.S. Army
Corps of Engineers Wetland Delineation Manual criteria.
Normal hydrology will be considered the percent of time which the upper 12" exhibits
inundation or saturation. If the amount of precipitation is unusually high or low than the wetland
hydrology success criteria will be 5% to 12.5% of the growing season.
The extended stormwater wetland criteria described in NCDENR Stormwater Best
Management Practices will be utilized to design the storm water treatment components of the
wetland mitigation site:
- sized as one would using permanent pool depth of 3'
- detention of the runoff from 1" storm for a period of 2 to 5 days
- designed with a forebay
- 70% of the area of the permanent pool designed as a marsh with a. depth of 0 - I V" with
an almost equal distribution of area ((35%, and 351/o) botween 0"-9" and 9" to 18").
of fhe surface are- will bz a. smal pooF whem, tht° outleLl is located.
:Tf OE 1?r; vv at _" DonC, evil. CJ C JC ioDo:' IT., , onfunctior witf'? tYl. r .aurlfit : .
Page 6, July 28, 2002
- Plants shall be selected from Table 11.2 OF NCDENR Stormwater Best Management
Practice, April, 1999.
Use of Existing Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands
may also be suitable. Using these existing soils should hasten the development of vegetated cover
and hydric soil conditions. This is also an excellent use of an important natural resource. Many of
the recommended planted species currently exist in the vicinity of the area to be utilized for this
function. The majority of the species in the wetlands include Obligate (OBL) and Facultative Wet
(FACW) vegetation. Herbaceous plant species present include Softrush (Juncos eflusus), sedge
(Carex spp.), Duck potato (Sagitaria latifolia, Arrow arum (Peltandra virginia), Common Three-
Square (Scirpus pungens), Touch-me-not (Impatiens capensis), Smartweed (Polygonum spp.), and
others. Supplemental plantings will be selected from Table 11.2 in the Storm water Best
Management Practices, NCDENR, April, 1999 based on actual field conditions, if required. Being
that the site is in the vicinity of other wetlands and floodplain areas it is expected that the area will
benefit from the natural seed sources available. It is expected that herbaceous and scrub/shrub
wetland species will rapidly volunteer in the area.
Emergent Zone Schedule - it required
Botanical Namg Common Name Size Notts
Rushes/Sedfes*
Juncus effusus
Scirp. americanus
Aeons calamus
Shallow Water Plants
Smooth Needle Rush 2 yr. peat pot Y O/C.
Common Three Square 2 yr. peat pot Y O/C.
Sweet Flag 2 yr. peat pot 3- O/C.
Peltandra virginica Arrow Arum 2 yr. peat pot T O/C.
Sagitaria latifolia Duck Potato 2 yr. peat pot T O/C.
Saunuus cernus Lizard's Tail 2 yr. peat pot 3' O/C.
Nuphar luteum Spatterdock 2 yr. peat pot 3' O/C.
Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species,
quantities, and size, which will be utilized for the mitigation sites will be dependent on availability,
cost, time of year in which planting occurs. Control structures such as sedimentation traps,
siltation barriers, and/or at minimum silt fence will be utilized as necessary.
Page 7, July 28, 2002
Seeding Spedfaeadon for Herbaceous and Cover Crop in Wetland Mitigation Sites
Zone 1- Wetland areas in temporarily saturated soils or subject to occasional and brief inundation
Dates T-VM Rate
April 1 - Jul. 15 Red Top Grass
Smartweed
7 lbs/acre
20 lbs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 lbs /acre
(to be followed by permanent mixture)
Sept. 2 - Nov. 1 Smartweed
Red Top Grass
20 lbs /acre
7 lbs/acre
Nov. 1- March 31 Temporary Crop 40 lbs /acre
Wheat or Winter Rye
(to be followed by permanent mixture)
The following species may be substituted:
- Bidens connata (Beggar's Tick) and other Biden's species
- Leersia oryzoides (Rice Cutgrass)
- Panicum viratum (Switchgrass)
- Peltandra virginica (Arrow Arum)
ine Instructions
1) Seed in the dry period
2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when
broadcasting
3) tree and shrub planting should be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100
stems per square meter upon germination. Substitutions may be permitted with approval. Other
native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
grasses shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than
perennials to allow natural succession. If a perennial is required for erosion control than a mixture
shall be selected that allows natural volunteering to occur.
Storm water Management
A Stormwater Management Plan will be designed. and. implemented for the pMject to meet the 401
Water Quality Certification requirements. Stormwate- runoff from paved surfaces has the potential
to degrade water quaiitY iL al! t pes of Nvatem. V1--c- amenuor, basin:. and/or extended storrnwater
detention facilities shall be: the priman, treatment systern. Properi , designed storm water treatment
iaciihies nav:: bees prOver. 10 M, a viabie solution to real== Pollution, ', my are efficien : ir:
Page 8, July 28, 2002
removing suspended solids and other pollutants, reducing peak runoff rates, and controlling
downstream erosion. The Stormwater Management Plan will include facilities that will attenuate
the first inch of rainfall over a 24-hour period from most of the developed portions of the site.
Water will be released over a 2 to 5 day period. Discharge velocity of the outclass will be less than
5 cfs. Discharges from the wet detention ponds will outlet into the wetland areas The wet ponds
and/or extended storm water wetlands will designed per the guidelines in NCDENR Stormwater
Best Management Practices, April 1999.
The Storm water Management Plan will also include:
A. Utilization of wetland mitigation areas for storm water treatment. The design concepts will
be based on information derived from Design of Stormwater Wetland Systems by Thomas R.
Scholar.
Summary
- Within the area required to serve as an Extended Detention Wetland the permanent pool of water
will be sized as closely as possible using the Table 1.1 in the Stonmwater Best Management
Practices, NCDENR November, 1995.
- RMtement of the detention of the runoff, from the 1" storm for a period of 2 to 5 days.
- Area will include a forebay
- 70% of the area required will be designed as a marsh with a depth of 0 18", with an equal
distribution of area between 0" to 9" and 9" to 18". A small pool area (15% of the required surface
area) will be located near the outlet.
- It is expected that herbaceous and scrub/shrub wetland species will rapidly volunteer in the area.
Mann of the recommended species currently exist in the area to be utilized for this function.
Supplemental plantings will be selected from Table U.2 in the Stormwater Best Management
Practices, NCDENR, April, 1999 based on actual field conditions.
Wetland Construction Methodology
Prior to any construction activity, the proposed wetland mitigation site will be clearly
marked in the field.
Sedimentation and erosion control measures and other Best. Management Practices shall be
in place. The wetland areas that are to be created will be graded as required.
After excavation the wetland areas «611. be baclfilied to finish grades wial suitable topsoil
and, stabihzec as necessary to crcau tiie various; hydr6togical planting: zones and drainag4 pattern..
Stone armoring and appropriate geo-textiles may b-:, uiilize€ plus see6in , and piantin,. Runoff will
Page 9, July 28, 2002
then be directed into the area. Under normal conditions for the area, the soils are expected to be
inundated and/or saturated during the winter months and early spring for a period of at least 5 to
12.5% of the growing season.
Soils shall be topsoil or stockpiled suitable wetland soil and have a minimum of 40%
organic content. Soils shall be spread and compacted to 90%. Eighteen inches to two feet of
topsoil and shall be spread and adequately compacted as a planting medium throughout the
mitigation cell Note that grading in the proposed wetland areas should be below finish grade
prior to placement of topsoil. Before placement of the topsoil, the subgrade and hydrological
conditions must be assessed. Manipulation of soil depth will be required to create micro-
topography within mitigation cell. Field modifications may be required based on actual site
conditions.
The wetland mitigation areas shall be stabilized with grasses or other herbaceous materials
for at least one growing season to observe hydrological, soil development and vegetation which is
volunteering. Adjustments may then be made as required to the water control structures, spillways,
and grading as required. Installation of the wetland materials should not take place until the site's
hydrology has stabilized and discharge structures have been adjusted as necessary.
The entire mitigation cell shall be completely impounded to fully saturate soils prior to
adjusting discharge structures and establishing hydrological zones.
Watering to maintain moist soils throughout all elevations may be necessary during the
first growing season.
Vegetation
Planting includes of a diversity of saturation tolerant tree species, which are also high in -wildlife
value. The planting plan will also encourage a diverse canopy and mid-story vegetation. The
primary criterion upon which plant selection is based is the duration of soil saturation. Soil
saturation is expected to occur at a rate similar to adjacent wetland and / or riparian areas and is
expected to be for a minimum of 12 consecutive days and a maximum of 52 consecutive days
under normal circumstances during the early part of growing season. Tree species tolerant of these
hydrological conditions will be specified in the mitigation areas. Forested mitigation sites will be
planted at an initial density of approximately 500 trees woody stems per acre by utilizing a
combination of bare root seedlings and/or larger vegetation. Scrub/shrub mitigation sites will be
planted at an initial density of approximately 1000 woody stems per acre by utilizing a
combination of bare root seedlings and/or larger vegetation. In addition to woody species,
herbaceous plants will be will be planted in an organized patter, or groupings of a similar Mr.
hydrophytic zone. These zones adjacent to surface waters improve water quality by filtering runoff,
trapping sediment, absorbing nutrients, and provide wildlife habitat and a food source for aquatic
organisms, amphibians. binds and other wildlife.
Page 10, July 28, 2002
Vegetation will be selected from the following general lists.
Scrub/Shrub Zone
Alnus spp.
Cornus amomum
Sambucus canadensis
Itea virginica
Ilex decidua
Viburnum dentatum
Cephalanthus occidentalis
Lindera benzoin
Others that are approved
Bottomland Hardwood - Forested Zone
Carya spp. Diospyros virginiana
Nyssa sylvatica Quercus species
HerbaMs Zone
Frax. pennsylvanica
Taxodium distichum
Zone I - Wetland areas in temporaries saturated soils or subiect to occasional and brief inundation
Agrostis alba (Red Top) Polygonum spp.(Smartweed)
Juncus efusus (Soft Rush) Eleocharis spp.(Spikerush)
Zone 2 - Wetland areas prone to persistent flooding or ponding
Moist to 1 Foot of Water
Three Square Bulrush
Sedge species
Creeping Spike Rush
Lizard Tail
Carex species (Sedge)
Others as specified
Soft Rush
Others
Shallow Water Plants
Sweet Flag
Pickerel Weed
Arrow-Arum
Others
Duck. Potato
Other plants may be selected from Table 11.2 in Stormwater Best Management Practices, November 1995.
'Free Planting Zones
Planting zones are based on progressive toleration of saturated soil conditions.
A/B - Transitional Species, and species which tolerate minimum
duration of soil saturation
C/D - Saturation - Tolerant tree species
Forested Zone - Tree Planting Schedule
No more than 20°ib of the trees required to b: installed shalt be of one species to create diversity. Trees
shall be located in a naturalistic pattern. The minimum size shall be I yr, bare root seedlings. The size
specified below is recommended to increase survivability. Additional or alternate selection4; may be
necessary based on availability, site specific data, and cost factors. All of the listed species shall be utilized
unless approved othcm isc.
Page 11, July 28, 2002
Tame Scientific Name acin
Common Name
A/B Diospyros virginiana 9' On Center
Persimmon
C/D Fras. pennsylvaniea 9' On Center
Green Ash
C/D Nyssa sylvatka 9' On Center
Blackgum
C/D Quercus lyrata 9' On Center
Overcup Oak
A/B Quemus michauzii 9' On Center
Swamp Chestnut Oak
A/B Quereus phellos 9' On Center
willow Oak
A/B Quercus shumardii 9' On Center
Shumard's Oak
C/D Taiodium distichum 9' On Center
Baldcypress
Scrub/Shrub PlawMe Zone Schedule
Botanical Name . Common Name Size Notes

Ceph. occidentalis Button Bush 14" - 18" Plants 6'-7' O/C
Alnus serrulata Tag Alder 14" - 18" Plants 6'-7' O/C
Betula nigra River Birch 14" - 18" Plants 6'-7' O/C
Lindera benzoin Spicebush 14" -18" Plants 6'-7' O/C
Cornus amomum Silky Dogwood 14" - 18" Plants 6'-7' O/C
Sa nbucus canadensis Elderberry 14" - 18" Plants 6'-7' O/C
Others that are approved
** No more than 20% of the scrub/shrub materials required to be installed shall be of one species
to create diversity and shall be located in a pattern and directed by the planner. The minimum size
shall be 1 yr. bare root seedlings. The size specified below is recommended to increase
survivability. Additional or alternate selections may be necessary based on availability, site
specific data,, and cost factors. At least sin varieties shall be utilized.
Page 12, July 28, 2002
Emergent Zone/Aquatic Schedule
Use of Existing Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands
may also be suitable. Using these existing soils should hasten the development of vegetated cover
and hydric soil conditions. This is also an excellent use of an important natural resource. Many of
the recommended planted species currently exist in the vicinity of the area to be utilized for this
function. The majority of the species in the wetlands include Obligate (OBL) and Facultative Wet
(FACW) vegetation. Herbaceous plant species present include Softrush (Juncus effuses), sedge
(Carex spp.), Duck potato (Sagitaria latifolia, Arrow arum (Peltandra virginia), Common Three-
Square (Scirpus pungens), Touch-me-not (hmpatiens capensis), Smartweed (Polygonum spp.), and
others. Supplemental plantings will be selected from Table R.2 in the Storm water Best
Management Practices, NCDENR, April, 1999 based on actual field conditions, if required- Being
that the site is in the vicinity of other wetlands and floodplain areas it is expected that the area will
benefit from the natural seed sources available. It is expected that herbaceous and scrub/shrub
wetland species will rapidly volunteer in the area.
Botanical Name Common Name ___ Size Notes
Rushes/Sedges*
Juncus effusus Smooth Needle Rush 2 yr. peat pot 31 O/C.
Scirp. americanus Common Three Square 2 yr. peat pot 3' O/C.
Acoris calamus Sweet Flag 2 yr. peat pot 3' O/C.
* Planting shall be in naturalistic / random chumps to encourage diversity. Size at planting and variety
may vary based on availability, cost, and aesthetic objectives. Equal proportions shall be utilized. Final
layout of clusters to be field determined based on final surface and ponding conditions.
Shallow Water Plants*
Peltandra virginica Arrow Arum 2 yr. peat pot 3' O/C.
Sagitaria latifolia Duck Potato 2 yr. peat pot TO/C.
Saururus cernus Lizard's Tail 2 yr. peat pot 3' O/C.
Nuphar luteum Spatterdock 2 yr. peat pot 3' O/C.
* Planting shall be in naturalistic / random clumps to encourage diversity. Size at planting and
variety may vary based on availability, cost, and aesthetic objectives. Equal proportions shall be
utilized. Final layout of clusters to be field determined based on final surface and pondinm
conditions. Herbaceous species will be planted in 25 to 50 cm diameter clusters at a density of
1000 clusters per acre or will be seeded with a wetland speed mi,: at rat-. which will result iv..
coverage of at lean: 100 stems per square meter upon germination. Survival rates of seedin- roots.
and./or individual plantw- will 1:-; cxpiored, for cacl-, species. seiecte basee or availability, sit,
spe;•ific, data.. and cost f-actom..Ali n--V' planting veil cansis- o- 7 ACV, and OBL sloe-' CIS.
Page 13, July 28, 2002
Planting will be conducted in the spring and the fall. Annual ryegrass, millet or red top grass will
be utilized in order to provide temporary stabilization during the summer and winter months or
until planting times become available.
Seeding S notation for Herbaceous and Cover Crop in Wetland M'
bir- gWon Sites
Zone 1- Wetland areas in temporarily saturated soils or subject to occasjo w and brief inundation
Dates TVV" Rate
April 1- Jul. 15
Red Top Grass
Smartweed
7 ibs/acre
20 lbs /acre
Jul. 16 - Sept. 1
Temporary Crop
Jap. Millet or Sorghum 20 Ibs /acre
(to be followed by permanent mixture)
Sept. 2 - Nov. 1 Smartweed
Red Top Grass
201bs /acre
71bs/acre
Nov. 1 - March 31 Temporary Crop 401bs /acre
Wheat or Winter Rye
(to be followed by permanent mixture)
The following species may be substituted:
- Bidens connata (Beggar's Tick) and other Biden's species
- Leersia oryzoides (Rice Cutgrass)
- Panicum viratum (Switchgrass)
- Peltandra virginica (Arrow Arum)
Seedinui Instructions
1) Seed in the dry period
2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when broadcasting
3) tree and shrub planting should be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
Herbaceous species may with a wetland seed mix, which will result in coverage of at least 100 stems per
square meter upon germination. Subsitutions may be permitted with approval. Other native grasses or
annuals may, be selected. No fescue will be used in wetland areas. Annual grasses shall be utilized for
stabilization on surrounding slopes within Mitigation Area rather than perennials to allow natural
succession. If a perennial is required for erosion control than a mixture shall be selected that allows
natural volunteering to o:,cur.
Page 14, July 28, 2002
Fertilization - Herbaceous and Woody Plant Species
1) Use Osmacote fertilizer or approved equal. For spring planting, use 18-6-12, eight to nine month
release.
For winter and fall planting, use 18-5-11, twelve to fourteen month release.
2) If planting is under water, use Agriform 20-10-5 two year release 10 gram planting tablets.
3) Fertilize at time of planting
Recommended Ouantities of Fertilizer for various Herbaceous Plant Materials (GarbiSM
Dormant propagule 15 grams Osmacote or 1 ea. 20-10-5 IOg Agriform tablet
growing bareroot 15 grams Osmacote or 1 ea. 20.10-5 lOg Agriform tablet
container/fiber pot 30 grams Osmacote or 3 ea. 20-10-5 lOg Agriform tablet
plug (seedling) 15 grams Osmacote or 1 ea. 20-10-5 10g Agriform tablet
plug (collection) 30 grams Osmacote or 3 ea. 20-10-5 lOg Agriform tablet
BMWmended Quantities of Fertilizer for var ols Woody Species (Gar ischh)
1 quart container 30 grams Osmacote or
1 gallon container 90 grams Osmacote or
* 30 additional grams for each additional gallon
plug (seedling) 15 grams Osmacote or
20-10-5 lOg Agriform/Manufacturer rate
20-10-5 lOg Agriform/Manufacturer rate
1 ea. 20-10-5 10g Agriform tablet
MONITORING
Monitoring of the wetland creation areas will be performed to evaluate the mitigation sites relative
to the success criteria. Annual reports will be prepared which summarizes the data collected in the
field and notes trends. Photographs at fixed stations will be taken to document the trends and
changes occurring at the sites. These reports will be furnished to the USACE and the NCDWQ.
Vegetation Monitoring
Two sample plots for each vegetation community will be identified. Each sample plot will
represent a 50' by 50' area. A permanent sample plot location will then be identified for this site.
An observation plot will be established with a 30' radius that will allow recording of the number
and species of each surviving woody stem and the percent aerial cover of the three most dominant
species. Within the 30' radius area, a 10' radius representative sample plot will be established to
record the dominant herbaceous species and percent aerial coverage. Mitigation sites will be
monitored bi-annually during; Larch/April and again in August/September to measure survival
rate, species diversity, and growth as well as to identiny and- problems such as upland. o;M invasive
wetland species. Invasive species removal will: be as, needcc and, will include th- removal Of Such
piants as honevsucide., poison ivi7. blackberry. rose icudz and privet.
Page 15, July 28, 2002
Vegetation Success Criteria
Successful bottomland hardwood mitigation will be when at least 60% or 320 woody sterns per
acre are surviving for three consecutive years. A minimum of 288 woody stems per acre must be
surviving in the fourth year, and a minimum of 259 trees must be surviving in the fifth year.
Successful scrub/shrub mitigation will require 60% or 600 woody stems per acre surviving for five
consecutive years or 75% aerial coverage. Emergent mitigation will require 75% aerial coverage. It
is expected that if these criteria are not met, the site will be considered unsuccessful and
maintenance will be needed to provide the required quantity. A five (5) year monitoring program
will be conducted for the bottomland hardwood, scrub/shrub, and herbaceous communities or until
the success criteria is met.
Hydrology Monitoring
If necessary, monitoring wells used to evaluate hydrological conditions. Monitoring wells will be
designed, improved and placed in accordance with the specifications in the USACE, Installing
Monitoring Wells/piezometers in wetlands (WRP Technical Note HY-lA-3.1, August 1993).
Monitoring wells will be set to a depth of 24" below final grade. The wells will be placed in
vegetation sampling plots or transects to provide representative coverage within each of the
wetland system types. Hydrological sampling will be performed for wetland type and reference
location throughout the growing season at intervals necessary to satisfy the hydrology success
criteria.. If feasible, a continuous monitoring well be utilized. It will be observed on a weekly or
twice per week or as needed basis for at least the first year in order to establish a record of the
hydrology throughout the year. A minimum of one well will be established for each of the created
wetlands.
Hydrology Success Criteria
Saturation or inundation for at least 12.5% of the growing season at lower landscape positions
during average climatic conditions is the target hydrological characteristic. If wetland parameters
are marginal, USACE personnel will be consulted to determine the jurisdictional extent in
transition areas. The data collected during the monitoring period will be used to evaluate the
success of the mitigation sites. The success criteria are as follows:
Observed or recorded evidence of soil saturation within 12" of the surface for
a minimum of 5 % of the growing season.
Page 16, July 28, 2002
Contingency Plan
These vegetative, soil and hydrological characteristics must be met to determine the success of the
wetland mitigation. If the mitigation is determined to be unsuccessful, one or more of the following
contingency plans will be implemented.
Selected reinstallation of vegetation or other maintenance (thinning or
removal).
Extended monitoring periods.
Hydrological modifications or manipulation, and/or
Off-site mitigation sites, and/or
An acceptable alternative form of mitigation.
Report Submittal
An "as-built" plan drawing of the area, including initial species compositions by community type
and sample plot locations will be provided after the completion of planting. A review of the actual
design, densities, and quantities will also be included. These will be provided within 60 days of the
completion of the planting. Reports will document sample plot locations along with representative
photographs illustrating site conditions.
Annual monitoring reports will include:
Species and quantity of each surviving woody stem in the plot areas,
Estimated percent aerial cover of the dominant species,
Representative photographs,
Depth of water table during the monitoring period, and
Hydnc soil observations and any other hydrological characteristics.
Explanations of problems and resolutions
Field data will be recorded on a monitoring data form and submitted along with photographs in an
annual report. Vegetation monitoring will occur in August and September of each year. This will
be submitted to the USACE and the NCDWQ within 60 days of the site monitoring. After the fifth
year of monitoring or until all success criteria are met, a Final As Built Report will be provided for
review and discussion regarding compliance of the project with conditions outlined in the Permit
and to determine if further monitoring or modifications are required. The As Built Report will be
submitted within 60 days of the mitigation site completion and serves as official notice of
completion of mitigation construction. The report will include:
Final Elevations
Photographs
Sample Plot Locations
Well locations (if applicabiel
Probiems/Resolutior s
Page 17, July. 28, 2002
6. Other Information as deemed appropriate
7. Planting Design
OPERA77ONS AND MAINTENANCE PLAN
The mitigation areas will be monitored bi-annually to identify maintenance requirements that will
encourage the successful development of the wetland mitigation sites and function of the storm
water quality measures. This will include the following:
Vegetation management
Semi-annual inspections
Debris check after storm events
Establishment of a benchmark for sediment removal with specific elevations
Designation of a responsible party
Vegetation Management
The presence of invasive species that will effect the positive development of the wetlands shall be
identified at the monitoring periods and will be removed by the representative of the responsible
party. These species are likely to include honeysuckle, blackberry, rose, poison ivy, kudzu,
eleagnus, ligustrum, cattails, etc. Vegetation may be removed by physical or by the use of an
approved chemical application.
Inspections
Mitigation areas will be monitored bi-annually during March/Apnl and in August/September or
after storm events. Each bi-annual or post storm monitoring event will determine the need for
removal of debris and identify any necessary repairs to the mitigation site such as those caused by
erosion.
PROTECTION FROM FUTURE DEVELOPMENT
Upon completion of construction of the mitigation sites as - built drawings will be prepared. The
survey will include:
boundary of each area
- finish grades
- location of monitoring wells and sample plots
- drainage control features
- Other significant information,, as required
The created wetlan& will be protected in perpetuit.., front future: impact:: b,, the applican. or by a
group designated by the applicant for this purpose:. Development of these areas Nvil1 be dred
restricted.. FW°Ctriictiv:, cov^zy,: ms o- similar mechanism,, will,, b dwvcior?° for an rova! ?F?. tht.
Page 18, July 28, 2002
USACE and/or NCDWQ and will include the following information:
That the area shall remain in its natural condition in perpetuity
Acreage of wetlands
Prohibition of the placement of utilities, filling, dredging, construction, or other
activities.
A permanent easement for the purpose of constructing, monitoring, and maintaining the
mitigation area and preserved wetlands.
Obligations if monitoring indicates that the area has not met the success criteria
Monitoring will begin when planting of the mitigation site is completed and continue semi-annually
for 5 years. Mitigation areas will be monitored bi-annually during March/April and
August/September to measure survival rate, species diversity, and growth.
Changes in the planting schedule may be required due to hydrological factors such as site and
weather conditions. If planting is delayed then the soil will be stabilized with an annual wetland
grass mixture until suitable hydrology has been established for planting. Changes in the schedule
will be reported to the USACE and NCDWQ for review and approval. Plants that volunteer will be
evaluated as to their suitability with the mitigation plan to determine if they should be removed,
remain or be relocated.
Operations and Maintenance Plan
The Mitigation areas will be monitored bi-annually to identify maintenance requirements that will
encourage the successful development of the wetland mitigation sites and function of the storm
water quality facilities. This will include the following:
a) Vegetation management
b) Semi-annual inspections
c) Debris check after storm events
d) Establishment of a benchmark for sediment removal with specific elevations
e) Designation of a responsible party
1) Vegetation Management
The presence of invasive species that will effect the positive development of the wetlands shall be
identified at the monitoring periods and will be removed by the representative of the responsible
party. These species are likely to include honeysuckle, blackberry, rose, poison ivy, kudzu,
cleagnus, ligustrum, cattaiis, etc. Vegetation may be removed by physical or by the use of an
approved herbicide such as "bound-up", "Rodeo" or equivalent.
:) inspections
Mitization areas will be monitored. bi-annually during March/April and, August/September and/or
Page 19, July 28, 2002
storm events to determine the need for maintenance such as the removal of debris and/or repairs to
the mitigation site such as those caused by erosion.
3) As-builts - Benchmark for Sediment Removal
Field adjustment is expected during the construction of the restoration and storm water quality
basins. An "as-built" plan drawing of the area will include a benchmark for sediment removal will
also be established for the storm water quality wet detention basins. Removed sediment will be
transported to an upland site and stabilized. In some cases it may be appropriate to utilize the
appropriate sediment such as washed topsoil to enhance or modify the development of the wetland
areas. This will be determined on a case by case basis and will be included in the monitoring
report.
THREATENED AND ENDANGERED SPECIES
Federally listed plant and animal species with endangered or threatened status are protected under
the Endangered Species Act of 1973. The site has been surveyed by Dr. Jim Matthews of the
Habitat Assessment Restoration Progam According to their report no endangered or threatgned
species were identified on the site.
CULTURAL RESOURCES
Mr. Tom Hargrove and Briece Edwards of the Cultural Resource Assessment Group evaluated the
site. The archaeological survey for the project site recorded several sites, which according to the
report appeared to have low research potential and appear ineligible for nomination to the National
Register of Historic Places. Based on a field survey no important archaeological, scientific, pre-
historical, or historical data will be lost or destroyed by work under the requested permit. The
reports have been submitted to the State Historic Preservation Office for review and concurrence.
The concurrence letter is included in the report.
AQUATIC HABITAT
The aquatic systems in the project area consist of headwater intermittent and perennial tributaries
of Lake Norman. A variety of wildlife is supported by these systems including mammals, birds,
reptiles, amphibians, fish, insects, mollusks, and crustaceans. Therefore strict adherence to an
approved erosion and sedimentation control plan will be maintained during the construction period
in order to control degradation of water quality downstream and protect the areas to be preserved.
Short term construction impacts, primarily stream sedimentation will affect aquatic habitat,
however this will be minimized to the extent practicable to promote rapid recovery. Project
construction will strictly adhere to an approved sedimentation and erosion control plan.
Bast Management Practices will include utilizing: siltation trapping ponds and other erosion control
structures where appropriate. Impacts from hazardous materials and. other toxins to fish and
aquatic iife such as fueis will be avoided by not. ,)ermitt* s„ mLr, ar= to b:? locater% near surfact
waters. Als: , as require- by tha 401 Ware?- QuaiitA" Certification conditiom. measures vailt he taker.
Page 20, July 28, 2002
to prevent "live" or fresh concrete from coming into contact with waters until the concrete has
hardened. Aquatic resources are expected to be enhanced through the restoration of wetland areas
that flood and pond for longer durations.
CONCLUSION
The 150 acre development will provide important economic benefits to the region. Based on the
value of the jurisdictional waters and wetlands on this site the developer has chosen to balance the
site's economic viability with its environmental value and permitability. The goal of the proposed
storm water treatment and mitigation measures is to help balance the environmental consequences
of this development by creating beneficial surface water and wetland habitat, preserving streams on
site and minimizing impacts to water quality downstream of the project. The mitigation sites will
be preserved by the applicant or by a group designated by the owner for this purpose. They will be
managed as an aquatic system of high value.
Please contact me if you have any questions or require additional explanation. Thank you for your
consideration.
Sincerely,
Leonard S. Rindner, PWS
Environmental Planning Consultant
Professional Wetland Scientist
NC Landscape Architect 4578
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LEONARD S. RINDNER, PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
Date: August 5, 2001
MEMORANDUM
To: Coy Shields
Dale Stewart
Brad Davis
Jonathan Crowder
From: Len Rindner
Subiect: Northlake Mall - Wetland/Stream Reaulatory Issues
Please find a brief review of regulatory issues on the project site.
Key Points
1. Based on my meeting with Steve Chapin of the USACE, he agreed with my assessment
that the overwhelming majority of the unusual streams that bisect the site are intermittent and
unimportant. Approximately 100 If of the stream is important. Although they are jurisdictional
and subject to the application requirements and permit conditions the proposed stream impacts
will be eligible to utilize the Nationwide Permits instead of an Individual Permit. I will be
meeting with a representative of the North Carolina Division of Water Quality to verify their
determination and potential mitigation requirements in the near future. All of Dixon Branch is
an important perennial stream.
Other General Information
The maximum acreage limits of most of the new and modified NWP's (and their combination) is
1/2 acre. Most of the new and modified NWP's require notification to the United States Army
Corps of Engineers (USACE) for activities that result in the loss of greater than 1/10 acre of
waters of the United States. An application is required for any stream or surface water impact
using Nationwide Permit #39. The maximum impact to important streams will be 300 linear feet
of important streams. Nationwide Permit #14 may be available for road crossings, applicable. An
application is required to the NCDWQ for any stream crossings utilizing Nationwide Permit #I4,
or for any combinations of typically used permits. Use of bottomless culverts may not circumvent
the regulatory process.
If impacts to streams exceed 150 if of important and/or unimportant streams, or 1/3 acre of
wetlands, an application is required to the NCDWQ using Nationwide Permit #39. An
application is required for any use of Nationwide Permit #14 to the NCDWQ. Minimization
measures such as plan modifications may be required for impacts over the minimum thresholds
to reduce the impacts. With an application to the NCDWQ, storm water treatment facilities will
be required by the NCDWQ as a condition of the permit for all projects, including residential
projects, notably those over 30% impervious. Storm water detention may also be required.
Nortblake Mall Memo, Page 2
August 5, 2001
Mitigation is generally required with impacts to important streams and wetlands above the
threshold. Stream mitigation can include relocation and/or restoring and approved degraded
stream. This generally included meanders, substrate, banks, buffers, and combinations. Plans
must be submitted for approval. If a permit is authorized - there is potential of participating in
recently created state Wetland Restoration Program (WRP) for wetland and stream restoration to
meet NCDWQ requirements and the USACE requirements. The fee is $24,000/acre times the
ratio for wetlands and $125/lf for streams. If the WRP is not available, if will be necessary to
develop your own mitigation plan. Stream buffers are typically required to protect the remaining
streams on the property as part of the mitigation requirement.
Permits must meet standard and general conditions, i.e. endangered species, historic properties,
and other particular conditions. Comments area possible with and application from USFWS,
SHPO (State Historic Preservation Office), North Carolina Wildlife Resource Commission, and
other agencies.
Impacts made in a first phase may impact permitting on fixture phases if or when the thresholds
are exceeded. Therefore, and overall master plan including an evaluation of potential future
permitting requirements should be conducted. The USACE and the NCDWQ will evaluate a
project cumulatively. Typically, based on the Subdivision Rule in the regulations, the USACE
will evaluate the subdivision as one project. Each individual lot would not be a separate project.
If applicable, the new NWP general conditions limit activities in designated critical resource
waters and fills in waters of the United States within 100-year floodplains. All above-grade fills
under most NWP's are prohibited within the FEMA mapped 100-year floodplain below the
headwaters of any stream. Within the headwaters, above-grade fill is prohibited within the
FEMA- mapped regulatory floodway, and any above grade fill in the flood fringe must meet
FEMA standards.
On a case by case base the USACE may authorize Waters of the U.S. (i.e. streams) to be used for
storm water treatment facilities (i.e. wet ponds).
Some larger streams may not be crossed utilizing NWP#39 (those with a drainage area over l
cfs). Nationwide Permit #39 is not available to cross Dixon Branch.
Individual Permits
Individual Permits are required for all activities in Waters of the U.S. that do not qualify for a Nationwide
Permit and are reviewed on a case by case basis by the USACE and other agencies, including NCDWQ,
USFWS, NCWRC, and SHPO. As with NWP's a 401 Water Quality Certification from NCDWQ is a
requirement. There is also a Public Notice. By a Memorandum of Agreement, the EPA and the USACE
-
requires a strict mitigation sequence (no practicable alternative [avoidance], minimization, and
compensatory mitigation be followed for all Individual Permits. It is generally understood that obtaining
an Individual Permit may be difficult. Establishing that there are no practicable alternatives is the most
important part and most difficult in the evaluation process. The USACE may ask for additional
information regarding their comments. It is generally understood that Individual Permits have no
processing periods. Individual Permit applications that are not withdrawn are eventually approved,
however over 90°ro of the applications are modified (some substantially) in the process or include
additional avoidance, minimization, and mitigation conditions.

Northlake Mall Memo, Page 3
August 5, 2001
Recommendations
A variety of planning and permitting options should also be studied to utilize the current Nationwide
Permits effectively. Avoidance and minimization of impacts to wetlands and important streams can reduce
the regulatory process significantly. This can be achieved by incorporating the streams and wetlands into
the common open space.
It is strongly recommended that the Individual Permit process be avoided if possible, due to the
complexity. However, individual permits have been issued for projects in which an acceptable analysis of
alternatives and a significant mitigation plan has been proposed. However, it will be important to
anticipate the potential for extensive analysis, the time frame, potential response to the public notice, and
a less predictable outcome of the process.
Please let me know if you have any questions or require further explanation.
Thanks.
Leonard S. Rindner, PWS
Environmental Planning Consultant
LEONARD S. RINDNER. PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
Date: September 22, 2001
MEMORANDUM
To: Coy Shields
Dale Stewart
Brad Davis
Jonathan Crowder
From: Len Rindner
Subiect• Northlake Mall - Wetland/Stream Reaulatorv issues
I met with Mr. Pete Colwell of the NCDENR-DWQ on September 14, 2001 to review the
site and to discuss the streams, wetlands, and proposed site planning objectives. This
follows a meeting with the USACE on July 26, 2001 to review the stream determination
and assessment. A memo regarding the results of that meeting was submitted on August 5,
2001.
Key Points
1) The NCDWQ agreed with the determination that the streams on the site are
intermittent. Pete Colwell concurred with my assessment of the unusual nature of these
channels .
2) Because the streains were determined to be jurisdictional the project is subject to
review by the NCDWQ and the USACE. A permit application will be required and there
will be a need to review avoidance, minimization, and mitigation alternatives and measures
with these agencies.
3) Pete Colwell reviewed the requirement that any proposed plan include stormwater
treatment facilities as well as other stormwater management practices. Wetland ritigation
in the Dixon Branch floodplain was discussed as potential mitigation with the NCDWQ
and the USACE. These wetlands would provide additional filtration of stormwater
discharged from the stormwater treatment ponds that would be required.
Northlake Mall Memo, Page 2
September 22, 2001
4) The NCDENR-DWQ was contacted by landowners along the route of the
proposed connector road. The letter was sent to you from NCDENR-DWQ is an
acknowledgement of those contacts, our site visit, and a reminder that a permit wll be
required to impacts the streams and wetlands on the site.
I recommend that we meet to review the plans and begin the process of applying to the
NCDWQ and the USACE for permits.
Please let me know if you have any questions or require further explanation.
Thanks.
Leonard S. Rindner, PWS
Environmental Planner
Cc: Pete Colwell - NCDWQ
b ah. ?Tzu?C
LL' I
?OF W A TF9o ? t ?i A Xv - C C Michael F. Easley
?O G Governor
CO T- William G. oss, Jr., Secretary
j North Carolina Department of Environment and Natural ResArces
Gregory J. Thorpe, Ph.D.
p Acting Director
Division of Water Quality
September 17, 2001
Mr. Henry Faison
Trammell Crow Inc.
121 Trade Street
Charlotte, North Carolina 28202
Dear Mr. Faison:
SUBJECT: 401 Water Quality Certification
Reames Road Extension
Mecklenburg County, NC
This Office has received information indicating that you may be planning to impact
jurisdictional waters and/or wetlands during the construction of the Reames Road Extension on
the north side of Charlotte. Please be advised that the Division of Water Quality (the Division)
requires that approval be obtained prior to disturbing more than 150 linear feet of stream channel
(including flooding) or 1/3 acre of wetlands, or when using Nationwide Permit #14 under the
current Army Corps of Engineers (ACOE) Nationwide Permits. :
In order to obtain Division approval for this proposed stream impact, seven (7) copies of
the Preconstruction Notification Application (PCN), along with supporting maps and
documentation, should be completed and returned to the addresses listed in the application.
Please make sure that all maps submitted with the application are of suitable scale (e.g. 1" _
100') and delineate all impacted streams, ponds, and/or wetlands on the project site.
Downloadable copies of the Division's General Certifications as well as the PCN can be
accessed at the Division's Wetland web page:
http:/ih2o.enr.state.nc.us/ncwetlands
You should also note that issuance of a ACOE 404 Permit or receipt of a written ACOE
delineation verification does not relieve you of your responsibility for determining the need for a
401 Water Quality Certification prior to proceeding with any channel or wetland impacts.
If you have any questions regarding this matter, please contact me at [phone].
cc: John Geer, City of Charlotte
John. Domey, DWQ
Steve Chapin, USACOE
Sincerely,
Peter B. Colwell
Environmental SpeciaalllstC Vli ?g
s ?? ? g 2aa'?
T-:AM,M?L nPo??SOiv
c.;rysr?t??i l?
tax
LEONARD S. RINDNER, PWS
Environmental Planning Consultant 3714 Spokeshave Lane
Professional Wetland Scientist Matthews, NC 28105
Land Planning Tele: [phone]
Fax [phone]
Date: June 9, 2001
MEMORANDUM
To: Coy Shields
Dale Stewart
Brad Davis
From: Len Rindner
Subject: Northla_ke Mall - Wetland/Stream Regulatory Issues
Please find a brief review of regulatory issues on the project site.
Key Points
1. Streams have been identified on the Mecklenburg County GIS Mapping System. Mecklenburg
County SWIM buffers are required along Dixon Branch. Strong drainage patterns are also
indicated on the USGS and NRCS map.
2. The channels were carefully delineated and evaluated to determine the potential regulatory
requirements. The stream varies greatly from ephemeral, to intermittent, to perennial. A meeting
will be required with the U.S. Army Corps of Engineers to confirm whether or not this stream
will be "important" because of it's variability. If the stream is "unimportant" from the USACE's
perspective, the project may be eligible for Nationwide Permits instead of an Individual Permit
because the 300' linear foot cap would not apply. The maximum impact to wetlands to avoid the
Individual Permit is I/2 acre.
Fills of wetlands in FEMA floodplains may not be eligible for Nationwide Permits. The new
NWP general conditions limit activities in designated critical resource waters and fills in waters
of the United States within 100-year floodplains. All above-grade fills under most NWP's are
prohibited within the FEMA mapped 100-year floodplain below the headwaters of any stream.
Within the headwaters, above-grade fill is prohibited within the FEMA- mapped regulatory
floodway, and any above grade fill in the flood fringe must meet FEMA standards.
4. Intermittent and perennial streams (unimportant and/or important) require permits from the
USACE and the NCDWQ. Mitigation will likely be required by the NCDWQ and the USACE
for all perennial stream and important stream impacts. Storm water management will be required
with an application to the NCDWQ and/or USACE.
5. The Daniel McAulay site is crossed by Dixon Branch. A large portion of the site is within the
SWIM buffers and flood fringe of Dixon Branch
Please let me know if I could set up a meeting with the USACE to review the site. Let me know if you
have any questions or would like to meet to review this in more detail.
Thanks. Len
A Survey of Plant Communities and Plant Species of Concern
Reames Road Mall Site
We have evaluated the property at the northwest corner of the junction of Reames
Rd. and I-77. The work was performed on March 26, 1999. The objective was to
determine the plant communities, their quality and to look for the possible presence of
plant species of concern. The Mecklenburg County list of species of concern, attached,
from the NC Natural Heritage Program, July 1998, was used for comparison.
The site is for the most part highly disturbed, parts having been timbered,
functioning in agriculture, for utilities and for residences. We did not find any exemplary
plant communities. Much of the area is scrub, early to middle secondary growth with a
closed canopy, pine plantation or open field. The best forests are along the lower slopes
and the floodplain, but these have been timbered in the past, although there are some
large trees. We used an aerial photograph of the site, taken in 1990, to locate the
disturbed areas and to determine the length of recent past disturbance.
We primarily examined the open areas, since these are the most likely to provide
enough sunlight for survival for the species of concern for Mecklenburg County.
However, we did look at the floodplains. The following habitats were examined:
(1) The roadside of Reames Rd., Mt. Holly-Huntersville Rd., Alexanderana
Rd.and the numerous unpaved road ROWs leading to fields and utility lines.
(2) The utility line ROWS, including electrical and the gas line.
(3) Margins of lawns and barnyards.
(4) Margins of agricultural fields.
(5) Areas that were recently timbered and still in early succession.
(6) Floodplains along the creeks.
Although the survey was in early spring, based on our experience, we would have
been able to recognize the Federally endangered Schweinitz's sunflower, Helianthus
schweinitzii. We did not find any of this species. We did locate the Small-flowered
sunflower, Helianthus microcephalus, providing evidence that the sunflowers can be
identified in the winter condition. The Mecklenburg County list of plant species of
concern lists 16 other species of vascular plants. Some of the fall blooming species could
have been identified if present. These include Aster georgianus, Gnaphalium helleri var.
helleri, Lotus helleri, Silphium perfoliatum, Silphium terebinthinaceum and Solidago
rigida ssp. glabrata. None were located. We saw no specimens of Isoetes in the wet
depressions along the creek. Some of the spring blooming species are close to flowering
at this time. These include Anemone berlandieri, A. carohniana, Cardamine dissecta,
and Dodecatheon meadia var. meadia. These species were not detected either.
We have no recommendations regarding plant communities or plant species of
concern for the project.
Jim F. Matthews
HABITAT
ASSESSMENT AND
RESTORATION
PROGRAM INC.-,--w- - '
JAMES F. MATTHEWS, Ph.D.
T. LAWRENCE MELLICHAMP, Ph.D.
P.O. Box 655
Newell, NC 28126
[phone]
[phone]
fax: [phone]
March 29, 1999
Mr. Len Rindner
Landscape Architect and Environmental Planner
3714 Spokeshave Ln
Matthews, NC 28105
RE: Reames Road Mall
Dear Len:
Enclosed is the report referenced above, along with the invoice. Although we
found no plant species of concern, there is a concern for an aquatic situation. The stream
that flows south from Alexanderana Rd. (the headwaters are near the road) is named on
the LandDesign planning sheet, Dixon Branch. It is crossed by the gas line ROW, from
the NE-SW. In the open area of the Branch at the ROW is a large population of Waxer
Cress, Nasturtium ofcinale. This is not a species of concern. However Water Cress
grows only in the purest water. We have known about this population since 1992, so it is
not a recent happening that may not persist. While Chris was up there he did a quick
survey of the macroinvertebrates in the stream. Several of the rocks had an outstanding
representation of organisms, both in diversity and numbers. I don't know if Tony Roux
from Mecklenburg EP has sampled this stream or not, but with these preliminary
indications, all efforts should be made to protect this stream, and it may be important to
have a preliminary survey of the aquatic organisms before it is messed up. I just wanted
to pass this on to permit the best level of protection as possible.
Sincerely,
/ Tar- s F. lit atth-ws

( ,.tiaric: l?ritiat-ianfionita, Pi
??` i 1 ; ??re

SCIENTIFIC NAME
COMMON NAME STATE
STATUS FED. STATE
STATUS RANK GLOBAL
RANK
Mecklenburg
Vertebrates
Carpiodes velifer Highfin Carpsucker SC - S2 G4G5
Condylura cristata pop 1 Star-nosed Mole - Coastal SC - S2 G5T2Q
Plain Population
Lanius ludovicianus ludovicianus Loggerhead Shrike SC - S3B,S3N G5T5
Invertebrates
Alasmidonta robusta Carolina Elktoe EX - SX GX
Lasmigona decorata Carolina Heelsplitter E E S1 G1
Villosa delumbis Eastern Creekshell SR - S3? G4
Villosa vaughaniana Carolina Creekshell SC FSC S1 G2
Vascular plants
Anemone berlandieri Southern Anemone C - S1 G4?
Anemone caroliniana Prairie Anemone C - Sl G5
Aster georgianus Georgia Aster C/PE FSC S2 G2G3
Aster mirabilis Piedmont Aster C - S2 G2G3
Cardamine dissecta Dissected Toothwort C - S2 G4?
Carex projecta Necklace Sedge C - S1 G5
Cirsium carolinianum Carolina Thistle C - S1 G5
Desmodium sessilifolium Sessile Tick-trefoil C - SH G5
Dodecatheon meadia var meadia ,Eastern Shooting Star SR - S2 G5T5
Gnaphalium helleri var helleri Heller's Rabbit Tobacco SR - S2? G4G5T3
Helianthus schweinitzii Schweinitz's Sunflower E E S2 G2
Hexalectris spicata Crested Coralroot SR - S2 G4?
Isoetes virginica Virginia Quillwort C FSC S1 G3Q
Lotus helleri Carolina Birdfoot-trefoil C FSC S3 G3
Silphium perfoliatum Northern Cup-plant SR - S1 G5
Silphium terebinthinaceum Prairie Dock C - S2 G4G5
Solidago rigida ssp glabrata Southeastern Bold Goldenrod SR - S2 G5T4
Nonvascular plants
Rhachithecium perpusillum Budding Tortula C - S1S2 G1G2
Natural communities
Basic Oak--Hickory Forest - - - S3 G4
Mesic Mixed Hardwood Forest - - - S4 G5T5
(Piedmont Subtype)
Piedmont/Low Mountain Alluvial - - - S5 G5
Forest
Upland Depression Swamp Forest - - S2 G3
Xeric Hardpan Forest - - - S3 G3G4
Mecklenburg*
Vascular plants
Baptisia albescens Thin-pod White Wild Indigo SR - S2 G4
Botrychium jenmanii Alabama Grape Fern SR - S1 G3G4
Delphinium exaltatum Tall Larkspur E-SC FSC S1 G3
Echinacea laevigata Smooth Conef lower E-SC E S1 G2
Rhus michauxii Michaux's Sumac E-SC E S2 G2
Mecklenburg**
Vertebrates
CyP_ ne__a cancma por Santee ?nm;n - P_-cmon? 5F. - S3 '=3T3Q
Population
Care«na Dar -_-2_ G
J? KF'_ T2=.!. F? _?rCr :??t.??_ DI "ISIOb OT_' =i::S ZJ, 7 , pr^r:77?^'-n1, -17177 100p,
These ranks are determined by The Nature Conservancy's system of measuring rarity and threat status. "Global" refers to
worldwide ranks and "State" to statewide ranks.
STATE RANK DEFINITIONS
S1 Critically imperiled in North Carolina because of extreme rarity or otherwise very vulnerable to extirpation in the. state.
S2 Imperiled in North Carolina because of rarity or otherwise vulnerable to extirpation in the state.
S3 Rare or uncommon in North Carolina.
S4 Apparently secure in North Carolina, with many occurrences.
S5 Demonstrably secure in North Carolina and essentially ineradicable under present conditions.
SA Accidental or casual; one to several records for North Carolina, but the state is outside the normal range of the species.
SH Of historical occurrence in North Carolina, perhaps not having been verified in the past 25 years, and suspected to be still
extant in the state.
SR Reported from North Carolina, but without persuasive documentation for either accepting or rejecting the report.
SX Believed to be extirpated from North Carolina.
SU Possibly in peril in North Carolina, but status uncertain; more information is needed.
S? Unranked, or rank uncertain.
B Rank of breeding population in the state. Used for migratory species only.
_N Rank of non-breeding population in the state. Used for migratory species only.
_Z_ Population is not of significant conservation concern; applies to transitory, migratory species.
GLOBAL RANK DEFFININMONS
G1 Critically imperiled globally because of extreme rarity or otherwise very vulnerable to extinction throughout its range.
G2 Imperiled globally because of rarity or otherwise vulnerable to extinction throughout its range.
G3 Either very rare and local throughout its range, or found locally in a restricted area.
G4 Apparently secure globally, although it may be quite rare in parts of its range (especially at the periphery).
G5 Demonstrably secure globally, although it may be quite rare in parts of its range (especially at the periphery).
GH Of historical occurrence throughout its range.
GX Believed to be extinct throughout its range.
GU Possibly in peril, but status uncertain; more information is needed.
G? Unranked, or rank uncertain.
G_Q Of questionable taxonomic status.
T_ Status of subspecies or variety; the G rank refers to the species as a whole.
ADDITIONAL DEFINITION
Elements following county names marked with one or two asterisks indicate obscure or historic records.
* Obscure record: the date the element was last obseryed in the county is uncertain..
** Historic record: the element was lasrobserved in the county more than 50 years ago.
Scientific and common names listed in parentheses are synonyms listed in US Fish and Wildlife Service, 1992, Endangered and
Threatened Species of the Southeastern United States (The Red Book).
NC N.4.1 URA:.: , fdERIT,4.(=^ I)T'ISK-W (t;? IIIJIKS S-xLl I)El`,T .lull, 199V
NC NATURAL HERITAGE PROGRAM COUNTY SPECIES LIST COVER SHEET
The county species list from the NC Natural Heritage Program is a listing of the elements (rare species, natural communities, and
special animal habitats) known to occur in a county. The information on this printout is compiled from a variety of sources,
including field surveys, museums and herbaria, literature, and personal communications. The Heritage Program's Biological and
Conservation Database (BCD) is dynamic, with new records being added and old records being revised as new information is
received. The BCD was developed and is maintained using methodology developed by The Nature Conservancy. The enclosed list
cannot be considered a definitive record of natural heritage elements, and it should not be considered a substitute for field surveys.
When this information is used in any document, we request that the printout date be given and that the NC Natural Heritage
Program be credited.
This cover sheet explains the four columns of status codes that are given on the right-hand side of the county list printout.
CODE STATUS
E Endangered
T Threatened
SC Special Concern
C Candidate
CODE STATUS
P Proposed (E, T, or C)
SR Significantly Rare
EX Extirpated
Plant statuses are determined by the Plant Conservation Program (NC Department of Agriculture) and the Natural Heritage
Program (NC Department of Environment and Natural Resources). E, T, and SC species are protected by state law (Plant
Protection and Conservation Act, 1979). C and SR designations indicate rarity and the need for population monitoring and
conservation action.
Animal statuses that indicate state protection (E, T, and SC) are published in Endangered Wildlife of North Carolina, March 16,
1992, Nongame and Endangered Wildlife Program (NC Department of Environment and Natural Resources). SR and EX statuses
are Natural Heritage Program designations. SR indicates rarity and the need for population monitoring and conservation action.
FEDERAL STATUS
This status is designated by the US Fish and Wildlife Service. Federally listed Endangered and Threatened species are protected
under the provisions of the Endangered Species Act of 1973, as amended through the 100th Congress. Unless otherwise noted,
definitions are taken from the Federal Register, Vol. 56, No. 225, November 21, 1991 (50 CFR Part,17).
CODE STATUS DEFINITION
E Endangered
T Threatened
P_ Proposed
C Candidate
FSC
T(S/A)
A taxon "m danger of extinction throughout all of a significant portion of its range."
A taxon "likely to become an endangered species within the foreseeable future throughout all of a
significant portion of its range."
A taxon proposed for official listing as endangered or threatened.
A taxon under consideration for which there is sufficient information to support listing. This category was
formerly designated as a Candidate 1 (Cl) species.
Federal "Species of Concern" (also called "Species at Risk"). Formerly defined as a taxon under
consideration for which there is insufficient information to support listing; formerly designated as a
Candidate 2 (C2) species. Currently, the US Fish and Wildlife Service does not recognize this as an
official designation.
Threatened due to Similarity of Appearance. Species with this designation are not considered biologically
endangered or threatened and are listed for trade purposes. [The American Alligator has this designation
due to similarity of appearance to other rare crocodilians.. The Bog Turtle (southern population) has this
designation due to similarity of appearance to Be- Turtles in the threatened northern population.]
Pi-as,_ Mote that th:- US Misr and WIldliif Service no ioncer recognizes the following cateuories:
3f' Candidate 3A A. iaxon formerly under consideration for listing. but for which there is "persuasive evidence of
extinction. "
3P Candidate 3P 1: taxon forTnerl- under consideration for listing, hu. which current taxonomic understanding doer, not
SUPnOr'. L- L! aistincl mut`.' meetmg tn: ?-nQangtred 5p`,cleF. Aci s deI:nltlor of ` Spectes_'
3C Candidate ;C A taxm formerly under consideration for iisiip_,.:, bu: whi::h has been "T)roven to be more abundant or
widespread than previously believed and/or [which is] not subject to any identifiable threat."

NSTATE
+ W Uwn NNU+
North Carolina Department of Cultural Resources
State Historic Preservation Office
David L. S. Brook, Administrator
James B. Hunt Jr., Governor Division of Archives and History
Betty Ray McCain, Secretary Jeffrey J. Crow, Director
March 21, 2000
Leonard S. Rindner
3714 Spokeshave Lane
Matthews. NC 28105
Re: Reames Road development tract, Huntersville vicinity, Mecklenburg County, ER 99-9258
Dear Mr. Rindner:
We have received the archaeological report for the above project.
During the course of the survey fifteen sites were located within the project area. Mr. Hargrove
recommended that no further archaeological investigation be conducted in connection with this project.
We concur with this recommendation since this project will not involve significant archaeological
resources.
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.
Sincerely,
U
David Brook
Deputy State Historic Preservation Officer
DB:scb
cc: Briece Edwards
Locatior; Mailing address Telephone/Fax
ADMINISTRATION 507 N. Blount St., Ralei&h NC 4617 Mai" Service Center, Raleigh NC 7699-4617 [phone] 733-865:
ARCHAEOLOGY 421 ?. Moen-, S:.. Raleigh NC 4619 Mail Service Center. Paieigh NC' 376?)U_46tq (919) 73?-734- 715-2671
RESTORATION 515 N. }Noun; 5... Raleigh NC 4613 Mail Service Center. Raleigh NC 2760Q-4013
{9]9i 73?-654? 715-4501
SUEVEY & PLANNIN(, 5'j N. MOLL ! St.. Raiei_,h W. a61S Mail Service Center. Raleieh N"'1769U-4611; rN!N1 7i=,,_ Rtit

An Archaeological Survey of the
Reames Road.Development Tract,
Huntersville Vicinity,
Mecklenburg County, North Carolina.
Thomas Hargrove
May 1999
A. Report Submitted to LandDesign Engineering,
Charlotte, North Carolina,
by
Archaeological Research Consultants, Inc.,
Raleigh, North Carolina.
i
Table of Contents
Management Summary ...................................................................................................... 1
Introduction ....:..................................................................................................................3
Physical Environment ......................................................................................................... 3
Prehistoric Background ...................................................................................................... 4
Ethnohistoric Background ................................................................................................... 6
Historical Background ......................................................................................................... 8
Archaeological Research in the Project Vicinity .................................................................. 10
Other Historical Research In The Project Vicinity ......................................................... 10
Field Methods .................................................................................................................... 11
Results of the Survey .......................................................................................................... 12
Standards of Significance ................................................................................................... 22
Recommendations ............................................................................... .............................23
References Cited ...................................................................................................................24
ll
List of Figures
Follows
Page
Figure 1: Mecklenburg County and the project area ........................................................... 2
Figure 2: The project and survey area with archaeological sites ............................................ 2
Figure 3: The project and survey area with field conditions ............................................. ...:... 4
.....................................
Figure 4: The house remains at 31MK909** .......................... ..............17
Figure 5: Front view of the house at 31MK914** .......................................................................20
Figure 6: The barn at 31MK914** ............................................................................................20
Figure 7:' The house at 31MK915 * * (south or front elevation) ....................................................21
Figure 8: The house at 31MK915** (side or east elevation) .......................................................21.
MANAGEMENT SUMMARY
The archaeological survey of the proposed Reames Road development tract covered about
350 acres near Huntersville in northern Mecklenburg County, North Carolina. The purpose of the
survey was to examine the project area for prehistoric or historical archaeological sites with
significant remains that might be eligible for nomination to the National Register of Historic
Places. Development on the tract will be intensive, with pronounced impacts on all archaeological
sites on the tract.
The property adjoins a National Register property, the McAuley Farm, which covers
about 20 acres (Figure 2) and includes the McAuley Farmhouse (ca: 1880), several outbuildings,
the site of an early nineteenth century log house, and about 14 acres of surrounding farmland.
The nomination says that the McAuley Farm "represents the development of a typical
Mecklenburg County farmstead in the nineteenth and early twentieth centuries." The intensive
development proposed for the adjoining tract may have an impact on the rural setting of the
McAuley Farm and be considered an adverse effect on the National Register property.
Since about 80% of the project area is wooded, the survey relied heavily on screened
shovel tests at intervals of 30 m (100 feet). We recorded four prehistoric sites with this
technique. In areas with exposed ground surfaces (plowed fields, logging roads, farm roads, tree
falls, sewerline corridors, etc.), the surveyors closely examined the exposures for prehistoric and
historic artifacts. We recorded eight sites with this technique. The other three sites are historic-
period houses with standing remains.
The survey recorded 15 sites, including one previously recorded site. Each site appears in
the following list with its state-assigned site number, a brief description of the site and its research
potential, and our opinion as to whether the site should be considered eligible for nomination to
the National Register of Historic Places:
Site Number Type of Site Research Potential
31MK488 prehistoric lithic low .
31 NlK488* * house site
31 MK904 prehistoric lithic low
31MK905 prehistoric lithic low
31MK906 prehistoric lithic low
31MK907 prehistoric lithic low
3IMK908 prehistoric lithic low
National Register
Potential
not eligible
not eligible
not eligible
not eligible
not eligible
not eligible
31 MK909* * historic-period house site low not eligible
31MK910 prehistoric lithic low not eligible
31 MK911 prehistoric lithic low not eligible
31MK912 prehistoric lithic low not eligible
31MK913 prehistoric lithic low not eligible
31 MK914* * historic-period house low not eligible
31 MK915 * * historic-period house low not eligible
31 MK916 prehistoric lithic low not eligible
31MK917 prehistoric lithic low not eligible
The prehistoric sites on the project tract are all low-density lithic scatters or isolated finds
limited to severely disturbed upland plowzone contexts. The prospects for obtaining significant
archaeological information from these sites are very small. These prehistoric sites are not, in our
opinion, eligible for nomination to the National Register of Historic Places.
The archaeological significance of the historic-period archaeological sites is doubtful. For
31MK488**, the relatively recent (twentieth century) age of the site and the high degree of
disturbance from plowing and soil erosion diminish the potential for additional research. The
other three historic-period sites (31MK909**, 31MK914**, 31MK915**) include standing or
collapsing structures, which could be considered intact features from an archaeological
perspective, but the relatively recent, twentieth century age of these farmsteads diminishes the
archaeological research potential of these sites.
The proposed project does not encompass the McAuley Farm National Register property,
but the two tracts adjoin. The proposed project design will need to take into consideration its
potential impacts on the McAuley Farm and possible means (such as visual buffers) to mitigate
those impacts.
We do not recommend additional archaeological study of the Reames Road development
tract. We do recommend that project planners consider the potential impacts of the project on the
McAuley Farm and consider methods for mitigating those impacts, if any.
Figure l: Mecklenburg County and the project area (arrow).
Base map: U.S.G.S. State of North Carolina.
Scale: one inch = eight miles.
i l \?? D7 1 _rHe6klenr,
/, ( \ ! x7 ) ( ?Ce \? may, 1 iPh c
p ?? L_ J 8p0'? a
Sample-Joseph
1l?? house ; \ 4 0 31 MK907 -'\
r 1) ` C -?R.M. Sample McAule Farm / .azs esl?.
\? (• ? !? log house y t
(NRHP) ?J lJ (31 MK906
)}AP. Wilson --Vance
1 house ` 31MK904 in Li
31 MK908
Ut. 31MK910
°? ? t \ (?, ?" _ ?=-i l u • ?l 'l 11111
?31MK488Gi???.1 31MK909'
1 ` 31 MK905? e c, J
aM - •.?-' 31 MK911 ?. ? i
P I-,
•I• \ njr Creek 31 48 5f ° 31`MK916i
3 K917
o `\\ r c l?\? .31 K914 ?J y, `.? 31 MK912 I . ?r o :posi
t l??/ ! , / tta \; 31 MK913 l
31 MK915
V 2485 Figure 2- The project and survey area with archaeological sites.
Base map: U.S.G.S. Derita (1972) quad.
Scale: one inch = 2,000 feet
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0.45 AC * 0.85 * 0.05 = 0.019 AC. = 833 SF 0.51 AC * 0.85 * 0.05 = 0.022 AC. = 944 SF ~ W ~ X ~ ~ ° x
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BIORETENTION AREA #5 = 833 SF = 0.019 AC. BIORETENTiON AREA #6 = 944 SF = 0.022 AC. w PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. PLANTING REQUIREMENT = 1,000 PLANTINGS/AC.
W TOTAL PLANTINGS REQUIRED = 19 PLANTINGS TOTAL PLANTINGS REQUIRED = 22 PLANTINGS
W TOTAL PLANTINGS PROVIDED = 19 SHRUBS /TREES TOTAL PLANTINGS PROVIDED = 22 SHRUBS /TREES
W YARD INLET THROAT = 761.80 W W W TOP=16 10 F M;Y OVERFLON
W W W BOTT 761.60
W W W W W 0 0 o ~ ~ M
W W W W W W W W WM O
W W W W W W 4' WIDE ENING N~ a t=om
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W W W W W W W W W WATER DEPTH PROP. CURB WATER DEPTH /PROP. CURB ~ ~ a Z Q ~ Q K Q
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W W W IN CUB (TYP.) TOP= 61.60 W W W W W 2 BOTT -761.10 TO BE ENTERED _ _ ~ _ _ - _ ~ - _ _ - _ 3:1 SLOPE ! I_I I _ _ _ _ ~ I I_ 3:1 SLOPE k' Z o,.,, ~ Q li N N
W W W W ON PA ENT STRI E - - - ~ off..... W u'o^^ =III = --_..4 MIN.--___-_ =11 -..'4 MIN.- - ~ -;_-=`I1=1. ~ ~ o~~~ oo~~ ,III _'~_pl AAITIAIC C(111 -..r': ~II~ _'-_DI AAITIAIf~ cnu - _•-=~:..il~ 7 Q ~~w ~ ~m~.N V
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W W W ~ W W W W inn nnv .,vim _ ..f L171`1 IIIYV JVIL
W W W W v W W W W W W u I :11M17_.._- - - - Iii
YARD INLET THROAT = 762.30 W W W W W W W W W W III-I . - _ II - n III- 6 1 4n PEA GRAVEL * < 6" 1/4" PEA GRAVEL
FOR EMERGENCY OVERFLOW W W W W 6 W W W W W W ® ? [ A C W USE ASTM C-33 X11- - I ( -MIN. SAND BED, MIN. SAND USE ATM C 33 ( v..'1"i':~~.~. .'6: w. ..~t'~C'r .'y 'A. 1',ti, n,:.i ,~p',tplN •i.l.'. ~-..~•~V~r ,M~yi~~~:
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W W W W W W W W W W W W W W W W W SECTION 1-1 SECTION K-K
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SCALE: AS SHOWN SCALE: AS SHOWN
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XREF: DRAINAGE PLAN STATE/0300IBASE
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File No. NC Tax Map No. Job No. 03-001 Cadd Dwg , File; DRA INAGE/03001LYGR XREF: DRAINAGE PLAN STATE 03001Base
SHEET: D3 OF D20

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SHEET: D4 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001LY1 XREF: DRAINAGE PLAN STATE\0300113ase

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9le No. NC Tax Yap No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/030016MP XREF: DRAINAGE PLAN STATE/030016ASE
SHEET: D5 OF D20

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EPTH DISTRIBUTION REQUIRED: ~ 0
GENERAL NOTES: MINIMUM EXTENDED DETENTION WETLAND AREA D U U
U 1. SEDIMENT FOREBAY 20% OF PERMANENT POOL AREA} ( z
ALL OF THE EXTENDED DETENTION WETLANDS (BASINS #2 AND #3) WERE DESIGNED IN " U -
CONFORMANCE WITH THE RULES CONTAINED IN THE NCDENR STORMWATER BEST 2. HIGH MARSH 35~ OF PERMANENT POOL AREA, 0 TO 9 DEEP) ~ ( a ,a
MANAGEMENT PRACTICES MANUAL FROM APRIL 1999. ALL OF THE BASINS HAVE BEEN
DESIGNED TO ACHIEVE 85~ TOTAL SUSPENDED SOLIDS (TSS) REMOVAL, AND THE FIRST ~
INCH OF RAINFALL WILL BE RELEASED OVER A DRAWDOWN PERIOD OF 48 TO 120 U o
HOURS (2 TO 5 DAYS). RUNOFF CONTROL MEASURES SHOWN ON THIS PLAN HAVE F PERMANENT POOL AREA 9" TO 18" DEEP N 3. LOW MARSH 35~ 0 ) ( ~
z c + + + + + + N
BEEN DESIGNED TO MEET OR EXCEED NORTH CAROLINA STATE GUIDELINES FOR + + + + + N
EXTENDED DETENTION WETLANDS. + + + + + + tl• ~ Q OC Z
4. MICROPOOL 10% OF PERMANENT POOL AREA) w
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1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO TREATMENT AREA #1; 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO BA! OVER DRAINING TO BASIN 1: ~ ~ N ; 1. CALCULATE PERCENT IMPERVIOUS C # Z LL AINING TO BAST #1
W
AMOUNT OF IMPERVIOUS AREA = 45.10 Ac. = AMOUNT OF IMPERVIOUS AREA = 10.16 Ac. = 89% AMOUNT OF IMPERVIOUS AREA 59.04 Ac. _ ~ LL
90% TOTAL SITE AREA TO BASIN #1 50.10 Ac. TOTAL SITE AREA TO BASIN #1 11.46 Ac. = = 89% _ - 80% 0 N Z TOTAL SITE AREA TO BASIN #1 73.89 Ac.
w a ~ z ,
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2. DETERMINE AVERAGE PERMANENT POOL DEPTH: 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: . 2. DETERMINE AVERAGE PERMANENT POOL DEPTH. ~ W ~ 111 0 J c~
EPTH = 3.0' U ~ O ~ PERMANENT POOL D n ~
PERMANENT POOL DEPTH = 3.0' PERMANENT POOL DEPTH = 3.0' ? V N .r o i i
d
7
3. FlND CORRESPONDING NUMBER FROM TABLE 1.1; 3. FIND CORRESPONDING NUMBER FROM TABLE 1.1: RESPONDING NUMBER FROM TABLE 1.1: 1.1. 3. FlND COR ~ i
Table 1.1 Surface Area to Drains a Atea Ratio For Permanent pool Sizin For 8596 Pollutu?t Table 1.1 Surface Area to Drainage Area Ratio For Permanent pool Stufioe Ares to a Area Ratio For Permanent pool Sizutg For 8596 Pollutant n Permanent pool Sizing For 8596 Pollutant Table 11 1ka?nag
8 8 Removal Efficiency in the Piedmont Removal Efficiency in the Piedmont Removal Efficiency in the Piedmont ```,?d~d~nauHUrurNriipr
96 Impervious - Impervious
Cover 3.0 4.0 5.0 6.0 7.0 8.0 9.0 ~Yef 3.0 4.0 5.0 6.0 Covet 3,p 4.0 5.0 6.0 7.0 8.0 9.0 ~ ~ Mo°7Y 6.0 7.0 $.0 9,0 • °o N
~ °o ~ r~~? SQ° ~W° e 207_
0,44 20 0.97 .79 0.70 O.S9 0.51 .46 0.44 z V oW N N -o .0.59 0. 1 .46
20 0.97 0.79 0.70 .0.59 0.51 0.46 .44 2p .97 .74 0.70 .0.59 0.62 ~ S ~ ~ .8 0.70 0.64 .62 30 1.34 1.08 .9 0.8 0. 0 0.64 ~ Y odd oo ~v
30 1.34 1.06 0.47 0.83 0.10 0.64 62 3 1'.34 1.08 0.97 .8 4p 1.73 1.43 1.25 0.90. 0.82 .77 % 0 oa° °oo° ~
.90 • . 2 .T7 40 1.73 1.43 1.25 1.7 0.90 0.82 0.77
SO 2.06 1.73 1.30 1.09 1.00 .R2 50 2.06 1.73 1.30 1.30 1.09 1.00 .0.92 SO 2.06 1.73 1.50 130 L09 1.00 .0.92 ~r~rrri~i n~~````~ 1.30 nurnnaoinn
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10 60 2.40 2.03 1.71 L.51 1.18 1.10 60 2.40 2.03 1.71 1.51 1.29 1.18 1.10 L.51 1.29
70 2.88 2.40 .07 1.79 1.54 1.35 .26 70 .8 2.40 .07 1.7 1.54 1.35 1.26 7 2.66 2.40 .07 1.79 L54 1.35 1.26 1.7 a
BO 3.36 2.78 2.38 2.1 1.86 1.60 1.42 BO 3.36 2.78 2.38 21 .86 1.60 1.42 80 ` 3.3fi 2.7B .3 0 1.86 1.60 1.42 0 21 1
90 .74 3.10 2.66 2.34 2.11 1.83 1.67 90 3:74 3.10 2.66 2.34 2.11 L83 L67 g0 3.74 3.10 2.66 2.34 2.11 L83 1.67 2.34
'van in the bod of the table are 'van in to Notes: Numbers 'van io the body of the table ate given in pet+ceotag Notes• Numbers g< y gr p~ gas ~ 'ven in Nodes: Numbers given is the body of the mble are given in paxnmges. Br petstomges
Coastal SAIDA ratios can be obtained from the local DWQ Regional Office. Coastal SAlDA ratios rxn be obtained from the local DWQ Re the local DW Re 'ono! Office. Coastal SANA ratios son be obmined from the IoaJ D'WQ Regional Office. Q 8?
M NAGEMENT PRACTICES NCI FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 FROM: STORMWAIER BEST A , ~ FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 RACIICES, NCDENR, APRIL 1999
4. DETERMINE REQUIRED SURFACE AREA:
4. DETERMINE REQUIRED SURFACE AREA: 4. DETERMINE REQUIRED SURFACE AREA:
NUMBER FROM TABLE 1.1 ABOVE = NUMBER FROM TABLE 1.1 ABOVE x NUMBER FROM TABLE 1.1 ABOVE x A AREA =SURFACE AREA
x CONTRIBUTING DRAINAGE AREA SURFACE AREA CONTRIBUTING DRAINp 3UTING DRAINAGE AREA =SURFACE AREA CONTRIBUTING DRAIN GE 100
100 100 z
3.74 3.74 3.36 F x 73.89 Ac. = 2.48 Ac. = 08,141 S (SURFACE AREA REQUIRED) i Ac. = 18,670 SF (SURFACE AREA REQUIRED)
- x 50.10 Ac. = 1.87 Ac. = 81,620 SF (SURFACE AREA REQUIRED) - x 11.46 Ac. = 0.43 Ac. = 18,671 100 100 100 U w
SURFACE AREA PROVIDED = 82,193 SF SURFACE AREA PROVIDED = 22,895 SF A PROVIDED = 110 248 S SURFACE ARE ,
NOTE; 0
STORMWATER TREATMENT AREA #1 UTILIZES THE NATURAL 5. FlND VOLUME TO BE CONTROLLED FROM 1" STORM: CONTROLLED FROM 1" STORM: Z STORM. 5. FlND VOLUME TO BE
FLOODPLAIN AT THE OUTFACE OF THE PIPE. THE
COMPUTATIONS ABOVE DEMONSTRATE THE SURFACE AREA TO
BE CLAIMED BY THE NATURAL DOWNSTREAM AREA. THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER Ql 4RY WATER QUALITY THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER QUALITY cn I
SEE SHEET D17 FOR OUTFACE DETAIL AND RIP RAP POOL} TO BE CONTROLLED MUST BE HELD IN THE BASIN N THE BASIN ABOVE POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE THE PERMANENT POOL LEVEL. Q
COMPUTATIONS. THE PERMANENT POOL LEVEL. U u 0
USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPI IN THE "SIMPLE USING THE RUNOFF VOLUME CALCULATIONS IN THE SIMPLE ~
METHOD" AS DESCRIBED BY SCHUELER (1987): ;7 ; METHOD" AS DESCRIBED BY SCHUELER (1987}: Q 00 0
Q ~ o N
SURFACE AREA OF STORMWATER TREATMENT AREA UTILIZING THE NATURAL FLOODPLAIN Rv = 0.05 + 0.009 (I) Rv = 0.05 + 0.009 I U r ~ -M
Z voi N STORM RUNOFF (INCHES) ~
STORM RUNOFF WHERE Rv =RUNOFF COEFFICIENT = ~ URM RUNOFF (INCHES) Rv =RUNOFF COErF1CIENT = k WHERE _ W ~ X ~ ~ ° x STORM RAINFALL (INCHES) o a Z Z wo a x
STORM RAINFA~L ORM RAINFALL (INCHES) ~ zw ~ Z3 0 ~ I M
IMPERVIOUS PORTII w ~zap~ ~ ~Qcor~ U w ao~~ Z zOJN~ :RVIOUS PORTION OF DRAINAGE AREA ACRES I =PERCENT IMPERVIOUS = CO
I =PERCENT IMPERVIOUS = DRAINAGE DRAINAGE AREA ACRES Z a z l i O~ o° i l ( ) ~ Q07pp U U NN DRAINAGE AREA (ACRES) W ~ _ z I N M
(n WpC~tD ~ JQ~,,.'1~000 00 r~
~ tai~MM ~ V O>MM = 80 = 0.77 IN. IN. Z ~narn" 3 ~W°~° M O M
Rv = 0.05 + 0.009 (89) = 0.85 (IN./IN.) Rv 0.05 + 0.009 ( ) ( / ) g ~ww y ~o~
VOLUME TO BE CONTROLLED:
VOLUME TO BE CONTROLLED: IMPERVIOUS POR110N OF DRAINAGE AREA ACRES
VOLUME _ (DESIGN RAINFALL} (Rv) (DRAINAGE AREA) 4GE AREA VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA)
1 FT. 1 FT.
VOLUME = 1 INCH x 0.85 IN./IN. x x 11.46 Ac 12 INCH - x 11.46 Ac. VOLUME = 1 INCH x 0.77 IC4,/IN. x x 73.89 Ac. o •H 12 INCH o ~ ~ M
W th LiJ p ~ Q F~~
VOLUME = 0.812 ACRE-FEET = 35,360 CF VOLUME = 4.741 ACRE-FEET = 206,530 CF N p,. ~ ~
:Q ~ °QZa rn ~o O Oo
THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF A PERT D F 2 TO 5 DAYS. THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 DAYS. t- _ ~ U ~ _ 0 0 U z_ Wc~ X
a Z _ NJ a JJ ~ Q
3JOQO CD ~ U' JOCOO > O > CD
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/ / / / / ~ i i/ 11 i/I 1 1 14r I! 1 \\1! + + //X'~i .A•//`+41 IJ I1 \ 1 \ \ \ 1 ! / r , r\ + X32, ~ i l / \ \
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STORMWATER TREATMENT AREA (SEE SHEET D18 FOR DETAIL) EXTENDED DETENTION WETI-AND #3 (SEE SHEET 19 FOR DETAIL) ETLAND #2 W
UTILQING THE NATURAL FLOODPLAIN (SEE SHEET D17 FOR DETAIL) SCALE: 1"=50' E
SCALE: 1"=100' =50' SCALE: 1"=100'
SHEET: D6 OF D20 20
rile No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP1 XREF: DRAINAGE/03001 BASE

i
I
DWQ Project No. DWQ Project No. ~ ~ 0
DIVISION OF WATER QUALIT1f •401 EXTENDED DETENTION (and POCKET') WETLAND WORKSHEET DIVISION OF WATER QUALITY -401 EXTENDED DETENTION and POCI~T' WETLAND WORKSHEET U U i ?
U
I. PROJECT INFORMATION (please compMte the folowing information z I. PROJECT INFORMATKfN (please complete the following information : U
ProjeclNeme: t\}0{~:~NL.AtLE U1L.l.AL, Project Name: NOiZ.~Ht.AtLE Uit_~ACti
Contact Person: ,~I;~A Kul ti~E~-SMA N r~ Phone Number: f~3} .53 t - b t e 3 Contact Person: A1JSA KuEb~Ei-SMAktJ Phone Number: f~3) 532•b163 a ¢
For projects wish multiple basins, ~edfy which basin this worksheet applies to: E-fl W ~ Z For prgects vui#h multiple basins, spegfy which basin this worksheet applies to: EwJ ~ 3 W ¢
Permanent Pod E~vation '~33.OU ff. (elevation of the orifice invert out) ~ ~ Permanent Pool E~vation X34 , Oo ft. (elevation of the orifice irnert out) U ~ 0
temporary Pool Elevatarr 3~ . l ~ 'alga+rar ;i +he :~:flrt 3trlchara 'rir~,r`'r' Temporary Poo4 Elevation .31 ft. (eleratfen of ~ swe irwett n) N ~ 0 ~
Z O
Permanent Poi Surface Area 22 9 5 sq. ft. (water surface area at permanent pool elevation) Permanent Pool Surface Area t 2.'t sq. ft. {water surface erg at permanent pool elevation} N 10~ 8
Drainage Area u , `t 6 ac. (on•siie and off-site drainage to the basin) impervious Area t t .'t b ac. (on-site and off-site dreinage to the basin) Drainage Area ~ 3. >3 ac. (on•site and off-site drainage to the basin) ~ Impervious Area ~ 3.89 ac. (on-site and oiFsite drainage to the basin) ~ g
Forebay Surface Area 4 r 5 sq. ft. (et permanent pool elevation appro>omately 15°/0)* ~ Z Forebey Surface Area j-2,,0 Sa sq. ft. {at pemmanent pool elevation approximately 15°k)' W
Marsh 0"-9" Surface Area ~8 0_+ 3 sq. ft. (at permanent pool elevation appro>amately 35°/°)* Marsh 0`•9' Surface Area 5 B~ . ft. at ermanent ool elevatan rozimatel 35%' Z ~~sq l P P aPP y) Z~
Marsh 9"•1 tl" Surface Brea i2 r o t 3 sq. ft. (at permanent pool elevation approbmately 35°/0)* Marsh 9`•18' Surface Area 3 5 sq. ft. (at permanent pool elevation appro>ama~ly 35%)` 5
Micro Pool Surface Area Z ~ t q 0 sq. ft. (et permanent pool elevation approximately 15°~)* Micro Pool Surface Area 1 r 0 2 sq. fk {at permanent pool elevation approzimatefy 15°h)' ~
Temporary Pool Volume 2q Sto cu. ft. (volume detained on top of the permanent pool)
Temporary Pool Volume I ~t 9 q ? ~ cu. ft (volume detained an top of the permanent pool) ~ ~ s O ~ o M
2 `f5 ! SAIDA used ~q R ~ r 9 - i2_ (surface area to drainage area retio)* +io 2+r2 l ~ = i ~ O
Diameter of Orifice I.50 in. (draw down orifice diameter) SAf DA used 3 Zi g ~ (surface area to drainage area ratio} U N Diameter of Orifice 3 . Sy in. {draw down orifice diameter) ~ N ~
~ J ^ W~ F--
II. REQUIRED ITEMS CHECKLIST II. REQUIRED REMS CHECKLIST N J ~ a 0 Q v Q O
Initial in the space provided to indicate the following design requirement have been met and supporting documentation is attached. If a Iratial in the space provided to indicate the fdk~vving design requirements have been met and supporting documentation is attached. (f a Z
requirement has not 6eer? met, attach an explanation of why. At a minimum, a complete stomwuater management plan submittal includes requirement has not been met, attach an explanafien of why. At a minimum, a complete stortnwater management plan submittal includes (D
a worksheet for eadr BMP, design calculations, plans and specificatror>s showing all BMPs and outlet structure details, a defailed a worksheet for each BMP, design calculations, plans and spedficatans showing all BMPs and. outlet sUuclure details, a detailed ~ LL
drainage plan and a fully executed operation and maintenance agreement. An inwmplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project drainage plan and a fully executed operation and maintenance reement. An incom late submittal dra a will result in a r uest for ~ ~ Z a9 P pa 9 eQ additional information and will substantially defy fmaf review and approval of the r 'ect
P~ W Q
licants Initials _ tL _The temporary pool controls runoff from the 1 inch rain. Z hcanis Imhals ~ i _The temporary pool controls runoff from the t inch rein. Q ~ fY N
The basin side slopes are no steeper than 3.1. Z The basin side sl es are no st er than 3:1. Q- Q op eep ~ W 4.
~L A planting plan for the marsh areas with plant species and densities is provided. A planting plan for the marsh areas with plant species and densities is provided. ~ J M
l~ Vegetation above the permanent pool elevation is specified. Vegetation above the permanent pool elevation is specified. U ~ ~ p
An emergency drain is provided to drein the basin. An erner n dram is rovided to dram the basin. Z ~ ~A ~ _ 9e oY P ~ U N ~i o O S
~~The temporary pool draws down in 2 to 5 days. Segment storage is provided in the permanent pool. tai __,_The ~mporary pool draws down in 2 to 5 days. n Sediment storage is provided in the pem~anent pool. a N Cn
5E ruc'rF A sediment disposal area is provided. Nv i~ = R [.t,. SEDt kt:.rJ ~ W. Ls. 5E uo'~F_ Asedimentdisposalareaisprovided. N~i~~ AU.. SEDik~N ~ Wlu.'DE. i ¢ w
_~_Ac:cess is provided for maintenance. '1LEHO ~ E~ ~.cit-r 5 ,'r~E , Access is provided for mantenance. REKO v ~i2oN 5 ,'rE , a U
~1,t. A sde specrfx, srgnetl end notarized operation and maintenance agreement is provided. ~ A site specific, signed end notarized operation and maintenance agreement is provided. can N
_ The dreinage area (including any offsite area) is delineated on a site plan. Acoess is provided for maintenance. The drainage area {including any offsite area) is delineated on a site plan. Access is proved for makrtenarz;e.
Plan details for the wetland are provided. Plan details for the wetland are provided. „~,~~~~uuuuurp~~
L Plae details for the inlet and outlet are provided. Plan details for the inlet and outlet are provided. ''~~i,,~~
_ ~G ,_A site spa~itic operation and mainfenanca agreement, signed and notarized by the responsible party is provided (see A site specific operation and maintenance agreement, signed and noter¢ed by the responsible party is provided (see °eaaaoo ~ o° ~
hffp:!lh2o.ehnr.state.nc.uslncwetiandsloandm.doc). * Pocket Wetlands have different design paremeters and are only assumed to remove 35%TSS - Sae pp.19and 20 of the NC DENR ht~:lih2o.ehnr.state.nc.uslr>cxretlandsloandm.doc). ~ °o° 7';; 'Pocket Wetlands have different design parameters end are only assumed to remove 35°k TSS - See pp.19and 20 of the NC DENR Do ~ M °°°~'N
Stormwater BMP Manual, Apri(1999.10°/o open water, 50°k high marsh, 40°/° low marsh. O J ~ 4~0 Stormwater 8MP Manual, April 1999. t0% en water, 50%hi h marsh, 40°/0 low marsh. = ~ ~,,ro oP 9
SUeN apnp~Zo..~e aW N N
S° ~ o°~
Y o°,Q~
'p~ia?mmmu~n~~~
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
(NORTMLAKE VILLAGE -EXTENDED DETENTION WETLAND #2) ERATION AND MAINTENANCE AGREEMENT ~ WETLAND DETENTION BASIN OP o
(NORTHLAKE VILLAGE -EXTENDED DETENTION WETLAND #3)
The wetland detention basin system is defined as the wetland detention basin and pretreatment including the wetland detention basin and retreatment includin The wetland detention basin system is defined as P 9
forebays. forebays.
Maintenance activities shall be performed as follows: Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly i ' ' nt runoff roducin rainfall event and at least monthly: 1. After every s grnfica p g
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition. a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of an obstructions such that drawdown of the temporary pool occurs within Y b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 io 5 days as designed. 2 to 5 days as designed. Z 0
a
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow 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. ve etative cover to maintain a maximum height of six inches, and remove trash as needed. o 9
3. Inspect and repair the col'sction system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning. d
4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is v ccumulated sediment from the wetland detention basin system semi-annually or when depth is Z 4. Remo e a I
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed reduced to 75% of the original design depth (see diagram below). Removed sediment shalt be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wetland detention basin or stream, etc.). t ~ (i.e. stockpiling near a wetland detention basin or stream, a c.).
g
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. The measuring device used to determine the sediment elevation shall be such that it will give an accurate
de th readin and not readily penetrate into accumulated sediments. P 9
When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. I de th reads 0.0 feet in the main ond, the sediment shall be removed, Q i' .When the permanent poo p P oo S
For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the Q o N
sediment should be removed to design levels. This shalt be performed by removing the upper 6 inches of v t desi n levels. This shall be erformed b removing the upper 6 inches of N o sediment should be remo ed o g P Y U
soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations. t ix inches below desi n elevations. Z ~ W ~ soil and stockpiling it. Then the marsh area shall be excava ed s g
Afterwards the stockpi+ad soil should be spread over the marsh surface. The soil should not be stockpiled t stock fled ~ ~ ~N Afterwards the stockpiled soil should be spread over the marsh surface. The soil should no be p ~ ~ Y ~ ~ X
for more than two weeks. for more than two weeks. > 3 ¢ Z Z W o a Z w t5 0 ~ ¢
When the ermanent pool depth reads 4.5 feet in the forebay and miaapool, the sediment shall be p W ~ ~Z00p0 ~ ZZ ~atDM ~ Q W d'cptG c0 M co c0
removed. When the ermanent pool depth reads 4,5 feet in the forebay and micro-pool, the sediment shall be U W ; ~ ~ Z ~ Z ~ N P ZaQZi i OQooi i N Ul) I I N N
removed. W N v U M V) W ~ [O fD Z ~ J o! °000 M M no 00
BASIN DIAGRAM Z ~~rriM Q U o~r+)MI'7 BASIN DIAGRAM ~ Q i. r~ 3 N w o 0 O O
(~f! In the blanks) Alin the blanks g --w~- ~ ( ) w
Permanent Pool Elevation 733.0 0 Q Permanent Pool Elevation 734.0
Sediment moval EI.728.5 7 /o
Sediment Removal Elevation 7330 0°/° Sediment moval EI.729,5 7 /o
Bottom E vation ~ 5% - Sediment Removal E4evatlon 734.0 0%
° Bottom E vakion 728.0 5% o ° g o
~ M ~O
FOREBAY MAIN POND MAIN POND ~ ~ Q ~ ~ FOREBAY a.
}}Q fA -Z ~ a
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These 6 3 ~ ~ p C~ 5. Remove cattails and other indigenous wetland plants when they cover 50 of the basin surface. These _ ~ U
plants shall be encouraged to grow along the vegetated shelf and forebay berm. alo the ve etated shelf and foreba berm. U Z ~ W ~ plants shall be encouraged to grow ng g y x ~ a Z Q~ a X 4 L~
NJ 4. Q J J LL O O O co
Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed. Wetland lantin densities in the marsh areas should be maintained by replanting bare areas as needed. _ ~ J ° ~ ~ ~ ~ o P 9 U =orn m o=~~ 00 U') co 1-_
Wetland plants should he encouraged to grow in the marsh areas. Wetland plants should be encouraged to grow in the marsh areas. oC ~ ~ o , i ~ ~ ~ o , ~ a ~ ~~M~ a ~W~~ Z n^ ~ C7 aLL.NCV I 1 00 co `n Ul-)
6. If the basin must be drained for an emergency or to perform mainte~.ance, the flushing of sediment - o ~ ~ W W o-~-- N N
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. ~ ~ 0 0 00 throu h the emer enc drain shall be minimized to the maximum ~~xrent practical. ~ ~ ¢ N ~ o J ~ N g g Y 7 a M i.,..,..~. c N m..,,~.,, d N N
7. All components of the wetland detention basin system shall be maintained in good working order. 7. All components of the wetland detention basin system shall be mai stained in good working order.
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All 8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. Ali accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be z maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or z
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or replanted as necessary. replanted as necessary. J J
I acknowledge and agree by my signature below that I am responsible for the performance of the seven I acknowledge and agree by my signature below that I am responsible for the performance of the seven Ui 0
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any 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. changes to the system or responsible party.
ar~oe LLC
' R , L o i+ ,,P- L. Print name: L C. Print name:
Title: a ?zec1 S ' r Title: acizzd ~a' ~~c W C
1cew~~~~ 16 I Ll$3C3q ~ ~:z y E Lan% LL C Address: p aoo E. HAJ, +1~ %i Ic
Addre T T C ~>C
Phon -).4% -a5$-b1 o0 r\ vv i H Phone.
Si9natu Signature:
J Z Date: b 6
Date: G cc cc
homeowners association unless more than 50% of the ~
Note: The legally responsible party should not be a homeowners association unless more than 50% of the Note: The legally responsible parry should not be a lots have been sold and a resident of the subdivision has been named the president.
lots have been sold and a resident of the subdivision has been named the president.
n v a Notary Public for the State of i 1 a a a Notary Public for the State of c Z
v of ti t~ cw~b do hereby certify S
CountYof ice mb , do hereby certify that e L County Y Y that Lj,
personally appeared before me this 3 r day of 'Tw&g- a.G 4 3 , and acknowledge the due personally appeared before me this r _ day of u e ' so and acknowledge the due
execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official
seal, KAREN A. MORENCY seal,
OUMI RRM& Msoam ! Coumy, MI KAREN A. MORENV p
In tlN&W Co., U My Comndsslon EVims 1212712007 Nobry Pkft, Mom* County, MI
Ac" in Odd Co., I>N
My Comm won b9m 1212112007 m 0 s
0 0 W u
LL Z J
SEAL SEAL W
u
My commission expires • a ~l My commission expires e E
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001BMP1 SHEET: D7 OF D20 ~o

BIORETENTION AREA COMPONENTS
ti N ~ ~ 0
THE SIX MAJOR COMPONENTS OF THE BIORETENIION AREA ARE: U U,
U GRASS BUFFER STRIP = Z
810RETENTION AREA LIMIT FLOW PAVEMENT PONDING AREA U
FLOW PLA ~ N11NG SOIL Q Y
SAND BED W a
ORGANIC LAYER OR MULCH ~
4'~~• PLANT MATERIAL t~ ~
32',0., ' ' ' ' ' • ' GRASS BUFFER STRIP Z p ~ N
4' _On 3' I ' 15 MIN. ~ N ~ ~;.y . . - _@~~:.rrs . . _ ~ , , ~ THE GRASS BUFFER STRIP IS LOCATED BETWEEN THE IMPERVIOUS SURFACE AND THE ~
8• N ~ , ~6 LENGTH p • • ~ BIORETEN110N AREA. IT FUNCTIONS TO REDUCE THE RUNOFF VELOCITY AND FILTER p~ Q
A (CURB QPENlNG) A • • o PARTICULATES FROM THE RUNOFF PRIOR TO DISCHARGING TO THE BIORETEN110N AREA. W Z p ~ Z ~
i F( • 0 Z ~
Ow b • ~ ~ 0 S ~.v~~~ ~ _ . . _ _ . ..~r .
n ~ ~ : ~ ? ~ • • ~ - PONDING AREA ~
~ ~ ~ V ..........2 MIN. • • • • • • • THE PONDING AREA OVER THE ROOT ZONE PROVIDES FOR SOME SURFACE STORAGE OF OC pC s
F[Ow THE STORM WATER RUNOFF, AND PROVIDES FOR THE EVAPORAl10N OF A PORTION OF O p ~ o
INLET DEFLECTOR °s~ e i ~ CUR THE RUNOFF. SETTLING OF THE PARTICULATES THAT HAVE NOT BEEN FILTERED BY THE N i J
(SEE DETAIL THIS GRASS BUFFER OR THE SAND BED OCCURS IN THE PONDING AREA. ~
SHEET} T' PLAN J
3' fp? ~ IOTtOM un' I/2'MIn.Rod, ris N0. t CONC. FLOW FLOW ~ a Q °
f ORGANIC LAYER OR MULCH tL ~
THE ORGANIC LAYER PROVIDES A MEDIUM FOR BIOLOGICAL GROWTH AND ~
FlED STANDARD TIER V CURB AND GU DECOMPOSI110N OF ORGANIC MATERIAL. THE ORGANIC OR MULCH LAYER ON THE
NOT TO SCA ~ ~ LE SURFACE OF THE SOIL HAS SEVERAL PHYSICAL AND BIOLOGICAL FUNCTIONS. THE
SURFACE LAYER ACTS AS A FILTER FOR POLLUTANTS IN THE RUNOFF AND PROTECTS Q tp
NOTE: THIS CURB AND GUTTER SYSTEM IS TO BE - • . NOT TO SCALE THE SOIL FROM DRYING AND ERODING AND SIMULATES THE LEAF LITTER IN A FORST cv
USED IN THE BIO-RETENTION A REAS ONLY COMMUNITY. THE ORGANIC OR MULCH LAYER PROVIDES AN ENVIRONMENT FOR ~ Q
SECTION 9.8 MICROORGANISMS TO DEGRADE PETROLEUM-BASED SOLVENTS AND OTHER POLLUTANTS. n.
n ~ U p MAX, PONDED WATER Z ~
N Li o GROUND COVER OR DEPTH (6 INCHES) ~
.,AND BED MULCH LAYER - Q
~ ~ THE SAND BED IS LOCATED AT THE BOTTOM OF THE BIORETEN110N AREA. IT PROM ES w 3:1 MAX. ~ URB D 1
c+°~ ~ G r (TYp,) FOR DRAINAGE AND AERATION OF THE PLANTING SOIL, AND AUGMENTS THE ABILITY OF ~ J
a : ~ 3 A ~ \ FLOW FLOW THE BIORETEN110N AREA TO DRAIN THE RUNOFF IT RECEIVES.
_ - THE SAND SHALL BE FREE OF DELETERIOUS MATERIAL AND ROCKS GREATER THAN 1 I,uulluulll
91ao<(op i = , ROPOSED GRADE - - _ - . . ~ INCH IN DIAMETER. SAND SHALL BE ASTM STD C-33 CONCRETE SAND. '°I "<<~~~ii~~ 00400 ~
Tablo d.3 RECOMMENDED PLANT SPECIES FUR USE IN BIORETENTION -SHRUB SPECIES
Specie Moisdue R me Tolerance ~ M0~010A` (knnal ISOMETRIC
Characteiiatia Sci NaNU Lsditwta Habitat Pondiag Salt Oill Meals ]nsaxs 8xpoaun Form Hefght Root Native WUdlife -_-_-PLANTING SOIL:-_-_-_- ~ S~ ~ ~N= _ ~p
Common Name Stanra Orwe 8 PLANTING SOIL =off ~z°~=
&r6nis konemrs FAC Mantic 2.4 H H H M Sna to partial Oval ahrob 4•ti' Shallow No Low •.,•+~..;.,+•,jyq•~~~,!1', .h ' ~q`y1,;7+,~,,,,,;,,,,,;,~.. 6 1/4 PEA GRAVEL THE PLANTING SOIL IS THE REGION WHICH PROVIDES THE SOURCE OF WATER AND ;r °°d
Shade ' 1 Beri6arla thrwbrrgtl FAC Maic 2.4 H H M M Sun Rounded, S•?' ,ihallow No Med. ,;x,~'.;•,v.' • oe,Nrl• ~ +,wn~ti;•,'~k „;.a:grr~ `r ~ ~ NUTRIENTS FOR THE PLANTS TO SUSTAIN GROWTH. THE VOIDS IN THE SOIL ALSO ~ • o` PROVIDE FOR STORMWATER STORAGE. CLAY PAR11C ~
Japaoae Barbary Brad, dame 00000°000000°000 000°o LESTHATCOMPOSEAPORIIONOF ~ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 /~~~~1111111111111111t111```
aluab N.T.S. Ctrrhro aieifolia FAC Maic to 2.4 H H Sun to partial Ovoid efwb 612' Shallow Ya Med. ° ° ° ° THE SOIL ADSORB HEAVY METALS, NUTRIENTS, HYDROCARBONS, AND OTHER 0 0 0 0 0 0 0 0 0 0 0
sweet wet maic Shade 6" PERFORATED X57 STONE POLLUTANTS.
Canes Sroloaifrm FACW Maic ~ 2.4 H H H M Sea a Shade Ardting, 8-10' Shallow Ya Rd Qakt ~ PVC PIPES ~
Euorrywurs slates FAC Mesic 1.2 H H H M Sea a shade Plat, dome, S•7' Shallow No No PLANT MA BIORETENTION AREA SAL °
aumymtws hotimnal
Euonynws ruroparus FAC Mesic I-2 M M M M Sun m partial Upright dame 10.12' Shallow No No THE ROLE OF PLANT SPECIES IN THE BIORETEN110N CONCEPT IS TO USE NUTRIENTS AND OTHER POLLUTANTS AND TO REMOVE WATER THROUGH EVAPOTRANSPIRAl10N. A
~ shade ovd thntb FOREST COMMUNITY STRUCTURE IS REPLICATED TO AVOID MONO U R
Namaaulrs vlrgiaia FAC Maic 2.4 M M M M San a Shade Vase•Woe 4.6' Shallow Ya Low wltch•hasxl NOT C LTU E SUSCEPTIBILITY TO SCALE TO INSECT AND DISEASE INFESTATION AND TO CREATE A MICROCLIMATE WHICH IS
N~x?kwn dhssj~onun FAC Manic 2.4 H M M H Sun Ovoid Slpab . Sari' Shallow Ya Med RESISTANT TO THE STRESSES TO WHICH LANDSCAPED AREAS IN URBAN AREAS ARE
w®mon St. Iohn'a wort 1(rx gla6ra FACW Maic to 2~t L M - H Sw to 'al 612' Slullow Yes Hi SUBJECTED, INCLUDING HEAT AND DRYING WINDS•
wet Maic ~ ~ nun shrub
ilex vrrtieillme FACW Mesic to 2.4 L M H Sun to peN•I Spnading 612' S7ullow Ya High N.T.S.
wet Mesic suo shnsd Juniperus comnuaris FAC Qry Maic 1-2 M H H M-H Sun Mounded b 3.6' Deep No High
"ranrrssa" to Mesic ~ taproot GENERAL GUIDELINES
comma lunlprnu horftoorasps FAC Dry Ma'tc I.2 M H H M•H Sun Matted airob 43' Dap Na High
"bar Harbor" to Maic taproot MINIMUM SIZE: Z 0
THE FOLLOWING DIMENSIONS ARE RECOMMENDED FOR BIORETENTION AREAS:
Ltadrm brntnin FACW Maic to 2-4 H H Snn Upright 6 612' Deep Yes High cebush wet Meaic W
My»ca pennsylvattca FAC Mesic 2.4 H M M H Stm to partial Roond~d, 6.8' Rhdlow Yes High - AVERAGE WIDTH OF A FUNCTIONAL BIORETENTION AREA SHOULD BE 15 FEET. °
b. ~ A WIDTH OF 25 FEET IS PREFERABLE.
I
- AVERAGE LENGTH SHOULD BE 40 FEET. FOR WIDTHS EQUAL OR GREATER o
shrub PMysorarpNS opNl~fiw FAC Dry Maic 2.4 M H Sun Upright shrub tt12' Shallow Yes Med THAN 20 FEET, THE LENGTH OF THE BIORETENTION AREA SHOULD BE AT Z
mnebark to wet LEAST TWICE THE WIDTH.
Mesic Vl~rnwN cau&+oidcs FACW Maic 2.4 H H H H Sun to partial Rounded, 68' Shdlow Yes Ht - THE PONDED AREA SHOULD HAVE A MAXIMUM DEPTH OF 6 INCHES. ~
Bh northern wild raisin snn
. shrub • - THE PLANTING SOIL SHOULD HAVE A MINIMUM DEPTH OF 4 FEET. Q
Vtbaraam dmuam FAC Man; 2.4 H H H H Sea ropmtial Uptight, multi- 8.10' Shadow Ya High arrow-wood tam t~hrub BIORETENTION AREAS WILL BE LIMITED TO DRAINAGE AREAS LESS THAN
Nf6ornom Ie+aago FAC Mesic 2.4 H H H H Son to pntiet Upright, multi- 1.10' Shadow Ya High 5 ACRES IN SIZE. ~
a~ am stemmed shrub a
Q s ° THE SIZE OF THE BIORETEN110N AREAS SHOULD BE 5% (WITH SAND BED) TO 1% ° » » N
(WITHOUT SAND BED) OF THE DRAINAGE AREA MULTIPLIED BY THE RATIONAL C U °
Tablt: 4.4 RECOb~NDED PLANT SPBCI6S POR USE IN BIORET6NIION TREE SPBCD3S Specks MahquR Ragioe lbkraatoe Getaeral COEFFlCIENT. Z w ~ M ~ ~ N
Maphoiogy W ~ ~ O~
BI ON ~1 Sdau(flc NaNie htdiaeor Habieg Foadigg silt all Meat Lnaxs Eapotaue Form Heigh Ron Name wihBiR ON~1 ~-~3 a Z=W° Z W ~ ° NUMBER AND SIZE OF PLANT SPEgES: Z ° ~ ~ Q °
enmama Name Saga (bane s Aar ralbraae PAC Mastic • 4.6 N H H H P•Mkl Sna S' m mnlti• 30.90' Shallow Ya Hi U W a~~in Z J Z~Nn 1
~ gh rod H tlem tree A MINIMUM OF THREE SPECIES OF TREES AND THREE SPECIES OF SHRUBS SHOULD BE Z a Qz I I O Q oo I I SELECTED TO INSURE DIVERSITY. HERBACEOUS GROUND COVERS ARE IMPORTANT TO W ~ w ~ ~ ° ~ V U _M M I
Amrlaneh&r amtadrnris FAC Mesic 2.4 H M H Parthll Sun Single m multi- 30.50' Shabw Ya Hi Bh PREVENT EROSION OF THE MU H N w ptOtD Z ~ z ~°00D ] LC A D THE SOIL LAYERS. o ~ Q
h atemtra &ndo •tgro FACW Maic to 4.6 - M M H Pattie! Sun Single amulti- SOTS' Shallow Ya Mad = L~~r7~ V OZMM ~Q~rn c~lWOo
rivabdrch H samtroe ~ 5 ~ W,_,,., cn ~°w THE NUMBER OF TREE AND SHRUB PLANTINGS MAY VARY, ESPECIALLY IN AREAS WHERE
BerNl•papuUJblia FAC Xaic• 4•G H H M H Partial Sun Single b mu16• 35-SO' Shallow Ya Hi Sh badt ddc parr tin to AESTHETICS AND VISIBILITY ARE VITAL TO SITE DEVELOPMENT AND SHOULD BE
Frtuinus afirrktuw FAC Mesic 2~l M H H H Suo Large tree SO.80' Deep Yes Low DETERMINED ON AN INDIVIDUAL BASIS• ON AVERAGE, 1,000 TREES AND SHRUBS
white ~ 0 Prasinus pawylvmiim PACW Maic 46 M H H H Faatid Sun Large tra /0•ti!' Shallow Ya Low p SHOULD BE PLANTED PER ACRE. TWO TO THREE SHRUBS SHOULD BE SPECIFIED FOR
O ash M 0 EACH TREE (2:1 TO 3:1 RATlO OF SHRUBS TO TREES).
Glnkao611oba FAC Maic 2~4 H H H H Sun Largetra SWO' ~dbw No Low ar`~ ;fir ~ , AT INSTALLA110N, TREES SHOULD BE 2.5 INCHES IN CALIPER, AND SHRUBS 3 TO 4 0 °o w, ~ o
Maidenhair tree to • Gkdltsia uiacmrtiws FAC Maic 2.4 H M M Suo Small eattopkd SOTS' IlMlbw You Low FEET IN HEIGHT OR 18 TO 24 INCHES IN SPREAD. GROUND COVER MAY BE AS SEED M
honeybatst hxgetaee p~ 0 OR PREFERABLY PLUGS. THE RELATIVELY M ~ M ~ ° ATURE SIZE REQUIREMENTS FOR TREES _ ~ Q ~
ltadprxs vbgleiae• PACU Maic • 2~ H H H Stm Detue 30.75' T~aoot Yes V AND SHRUBS ARE IMPORTANT TO ENSURE THAT 1HE INSTALLAl10N OF PLANTS ARE N ~ ~ ~ .z ~ o Z
~ ~ eastern tad txdn xate tttrto sae I r READILY CONTRIBUTING TO THE BIORETEN110N PROCESS (I.E., EVAPOTRANSPIRATION, N ' ¢ Q I- O o~
[orlnoUrbpnicwiare PACU Meek 2.4 H H H H Sim Round, thnae 2430' Sfulbw No No ° ~ ' w L°'` ~ POLLUTANT UPTAKE).
~ shade tree I Ugaf/wtbar sry?ac~laa PAC Meek 1.6 H H H M Sea Large tra 3470' Deep Yea ~ High 0 4 . x Z Y~ x a ¢ ~ ' ~ vi a ~ e' Z ~JO.- ~ 'JOO
eweetbum
Nyssa sylvatica FACW Maic • 4•ti H H H H San Large tree 4410' Shallow Ya black H 'c ~ 8~ y~ to dap ° ' ~ Table 4.6 Recommended Tice and Shrub S cin U ~ ~ m z z o°o l..o ;~.7C,: ~ ZOO) = OJ OCO f~ i
t I N W~ Q C1 ~Or;r; ~ J~ I '~1 - °z~""'~ Q a ~w~~ Trx Spacing 51uub Spacing Total Density Z ~ ~ o e ~ N N i
Plrrrarras aarjolm PACW Mesic 2d H - M Sun Large tree 70.10' Shallow No Low ~ Loadan ~ n : ~ feet felt stemslacre °o ~ W
Rasmus acckknraiis FACW Maio - 44 M M M M Sun Large tree 704W Shallow Yes Med F 's r Maximum 19 12 40U a M ~w F o N mw
syc=rC H ' P dskoUa FAC Xeric • 44 N H H L Sun tee with 75- Shallow 1. Yes- I High A Law eastern cottonwood Mock Spreading loo' r A e 12 8 1U00 r $r
Minimum i 1 7 1250
breeches 0 Pyres a dkrymm FAC Mesic 2.4 H H H H Sun Dense shade 30-SW Shallow No Low l _
Callerypear. Q nee J
Qranarr bkolo FACW Mesic to 44 H H H Sum to partial [age tra 75• Shallow Yes FUO a CONSTRUCTION OF BIORETENTION AREAS SHALL BE IN CONFORMANCE WITH THE NORTH
white oak wet mesic sum 100' Qwerm owelnea FAC mesic 1.2 H M M M Sun Large tee 50.75' Shallow Yes High t g" D CAROLINA STORMWATER BEST MANAGEMENT PRACTICES HANDBOOK (APRIL 1999). SEE o o CHAPTER 4 FOR FURTHER DETAILS AND SPECIFICATIONS.
scarlet oak m 0 0 uj
Qaercus macroca" PAC mesic to 24 H H H M San Large 75• Taproot No Hi but oak wet mesic a ~~1
spreadha tree t Qre o p korla FACW Mesic• 4.6 H H H M Sun Lugo tree 60 0' Shallow Yes High
Pin oak Hydric to deep
Qwnwphellos FACW Moak to 46 H H Sun Large nee 55.75' Shallow Yes High W a C /
willow oak wet mesic
Qaereas rmbru FAC Mesic 2-4 M H M M Sun to partial Large p tree 60.10' Dee- Ya Hi erm gh
spreading r gh
Table 4S RECOMMENDED PLANT SPECIES FOR USE IN BIORETEI~TION - BMACEOUS GROUND COVER
Species Moisture BI gim Tolerance Mme, General OR > D J Z
Characteristics
ScinaificName Indiator Habitat Padding salt Oil/ Metals Insects Exposure Form Height Root Native Wildlife Common Naas Statue (base System Lu cc
Agrosrisalba FAC Maic• 1.2 H H H Shade arse fR betous Yes High w ui
re" Xeric Shallow Andropegan gemrW FAC Dry Mesic 1.2 Sun Oran 2-3' Fiberous Yea
M int . mesic SiaBow
Derchanrpala caespilosa FACW mesic to 2.4 H H H sun tines 2.3' Fibaous Yes Med. Wed hairgrass wet mesic Shallow LL.
Hidna HeUx FACU mesic 1-2 - H Stn Evergrormd Flberous No Low
ED" I cover Shallow
later Cornkwlatus PAC mesic - 1.2 H L H H sun tines 2.3' Fiberaa Yes High birdsfoot•tefoii Xetic Sallow
Pachyradro rerminalis FACU mesic 1.2 M Shade Evergreen Fiberous No law
cover shallow Panlarm vrronm FAC to Mesic 2.4 H - LH Sun or Shade Ores 45' Flbemos Yes High
switch s FACU Shallow ii
i a fasru FACU Mesic 1•2 - - Shade Evergrart Piberoua No ~ ~
Mempida ground cover shallow Boston Ivy
Moo mWor FACU mesic 1.2 Shade Evergreen l4berous No Low F~ co
lame winkle zround cove Shallow Vince minor FACU mesic 1.2 Shade Evergreen Fiberoas No Low ui 0 z
common Periwinkle srowd cover Shallow W
J
OVER any OVERALL AREA MAP
SCALE: 1"=200'
File No, NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE
SHEET. D8 OF D20
i i

~ ~
BIORETEN110N SIZING COMPUTATIONS H 0 U
U,
DRAINAGE AREA A * C-FACTOR * 5~ (WITH SAND BED) U = z
~ =SIZE OF BIORETENTION AREA U
Q 4 Y Q
1.37 AC * 0.85 ~ 0.05 = 0.058 AC. = 2,536 SF W a.
W W W W ~ a 3 Q
W U p D
i,_ W
W W W 0 N
/ W W N
M W W BIORETEN110N PLANTING COVER COMPUTATIONS Q
' BIORETENTION AREA #1 = 2,536 SF = 0.058 AC. W Z Z ~f
$ 4 WIDE OPENING 4 W PLANTING REQUIREMENT = 1,000 PLANTINGS AC. IN CURB (TYP.) / Z ~
W TOTAL PLANTINGS REQUIRED = 58 PLANTINGS S
W TOTAL P AN - ~ W L TINGS PROVIDED - 58 SHRUBS /TREES a. I
W W ¦ ~ V b
y ~ ~ M ,h O ~ ~ ° M O
W .y _ ~ ~ U N N
.y ~ ~ W W O W W Q . ~ n
~ s Q
W i W y ~ 3" OF 12 MONTHS AGED MULCH W 6 PONDED ~ o 0 P D
W ~ WATER DEPTH PROP. CURB LL ~ RB
O W f W 4r - TOP EL.=747.80 - ~
n
F BOTTOM EL.=747.30 - - - ~I W III - - - :`I_ 3:1 SLOPE W .y _ - -
W III-1 ____---III W III - ___,~I, t Q o---o ~o
W W - _-~.-.PLANTING SOIL- ~-}--o ~ , I p~~ N
W ~ ~I~ , _ _ I~ 0-~ Q
~ W ~II =--_-_--,'I~II~ nn ~ 0. ~g
_ ~ ~i ; • , r.. I 6 1 /4 PEA GRAVEL JEL ~ o z ~
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CONC. SAND) .8 W to
B -747.30 W W W a oooaaoaooooo o Lii J
W 0 0 0 0 0 0 0 N 1 W W YA INLET THROAT = 148.50 V N
4g 0 F EMERGENCY OVERFLOW 14.0 AVG. " ~ 6 PERFORATED 9 ~
W W #57 STONE PVC PIPE (SEE PLAN i
W W 28.0 AVG. VIEW FOR INVERTS} W y 1 ~u?nuunnruurun / p~iq~~
W W W ?7 ~ ~~~i
W W SECTION A-A W W W W N.T.J.
W W W ~ ° °o N
W W W W y y W W W =~i J~ ° c 2 ey n ~ e
W W W W W W cVe ~ ~ etc oW O e° ~
W W W W 6" PONDED .y o~ o~: °0 `C-
W ~ W W WATER DEPTH 3" OF 12 MONTHS AGED MULCH W ~ W ~s W 0
W W _ iprrrrUra pn"``~~``
W W W I l l-~ - nnuuum
5 W W W W Z _ T P .=7 lull III_11'~ 0 - 0 EL 47.80 ~ _ , W W y _ i I--I ~ _ III„III
W W W y W y BOTTOM EL.=747.30 1 I I _ _ _ _ _ _ , ; _ _ _ _ , ~ -I 11= 11=Ix ._:_•_~~.:=:-_::___:.:_:_:__f_:.;_::_'1=- ~ 3:1 SLOPE n ~ SCALE: 1 =500 0
y W W W W W y 111-) _ _ _ . ~I I W W W =iii~'~-~_~:_-;=_,4' MIN. ,~~1-~
W W W W W , ~ I-1 III-L-
PLANTING SOILS W W J• ~-1 I II _ ~ , _ _ - _ _ _ _ ~ i~l i F- ~
W _Ili-1 _ -_-;111-__II W y I _ _ _ _ _ _ _ _ . I^I I I
• ~ : ; 6 i/4 PEA GRAVEL VEL
c) ,:;,.L.. ~ ~1 MIN. SAND BED,~Y,. ` ,
MIN. 9
gg,p' 6" PERFORATED ORATED
PVC PIPE #57 STONE 'E
„ SECTION B-B
SCALE: 1 =10 N.T.S. 0
a
BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION w
p
SCALE: AS SHOWN
d z

W
W W W m W W W W .:Y g
W y W BIORETEWTION SIZING COMPUTATIONS W W W
BIORETEN110N SIZING COMPUTATIONS Q ' ° °
+ W W W DRAINAGE AREA A * -F * C ACTOR 5~ (WITH SAND BED) W W W I * - ~ N DRA NAGE AREA A C FACTOR 5~ (WITH SAND BED) °
W W =SIZE OF BIORETENTION AREA W W W U ~ ~ =SIZE OF BIORETENTION AREA Z ~ ~o
W W W 0.85 AC ~ 0.85 * 0.05 = 0.036 AC. = 1,574 SF V ~ NN
W W W W 1.06 AC ~ 0.85 ~ 0.05 = 0.045 AC. = 1,962 SF ~ w~ x ~L x '7~j~3 Q Zw0 X
W W W z w ~ p ~za0pp Z ~~cDr) )M
W W W a ~ W co co W cwa~~n Z J ?~N~ )(O >r- Jt-
W W W of W •Y ZaQZII Oa°olI W U ~a~wa^o V v 1 A N >M
W W W V> WOcocD ~ ~~a0o0 )00 v-~
W W W BIORETENTION PLANTING COVER COMPUTATIONS Z ~~~M Q V o~M~ ~a~~ 3 ~ N,ZOMO BIORETENTION PLANTING COVER COMPUTAl10NS g .-w..,~ w ~p..~ >M >O > M
W W W 4 WIDE OPENING W W W 6
IN URB (TYP.) BIORETENTION AREA #2 = 1,574 SF = 0.036 AC. W W W CENTERED PLANTING RE UIREMENT = 1000 PLANTINGS AC. BIORETENTION AREA #3 = 2,038 SF = 0.047 AC. W ~L
W Q ~ / W W W ON ENT STRIPE TOTAL PLANTINGS REQUIRED = 36 PLANTINGS W W PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. y TOTAL PLANTINGS REQUIRED = 47 PLANTINGS
W W W TOTAL PLANTINGS PROVIDED = 36 Sk{R.U?c / TR«S TOTA+~ PLANTIP~GS PROVIDED = 47 SHRUBS /TREES
a W .Y
W W W W W W ° ° W M
W W W ° °
W W W F-~
W W W ~ ~ ~ N '~V a.
W W W W •Z ~ Q Q ~Y ~Y 1 Q n ~ ~ O O
W W W 6" PONDED 3" OF 12 MONTHS AGED MULCH W W WATER DEPTH PROP. CURB 0 4 WIDE OPENING 6 PONDED 3 OF 12 MONTHS AGED MULCH I- U 6 IN CURB TYP. U z ~ w WATER DEPTH /PROP. CURB ~ x Y ~ x X
W W W y O ? W a Z a~ W / F-- J ~ Q J Q
W 0 y - TOP EL.=767.50 - _ ° co ~ o ~ O 7 O
_ _ TOP EL.=762.60 _ W ® W W W W W W -I I - ~ W BOTTOM EL.=767.00 -+!I_il. = ------_----_'~I_' - Q °~MM ~ '-W~~ D LO 1 I
W a W BOTTOM EL.=762.10 ~ I - 1 _ 3:1 SLOPE _ - - - - - - - _ 3:1 SLOPE L~ - - _ _ _ _ ~ ZZf~(~ L QLL.NN 00 7Lo ~4 N
~fl - =,:'=:4' MIN._==~ - _ : t~ o~oo~ W °°o °o OD
~t-
W W ~ o y ~ 'I -=--PLANTING SOIL=',-~ L- Fn- V CV
y -I~~ III - T_II
W W W 63 r.. r... = II _''11=_T y y y w ~ I _ X !VIA I if .,?r , n . run: i 1- »
6 4 y 1/411 PEA GRAVEL 4» PEA GRAVEL W W MIN. SAND BED'.r•,,: I (USE ASTM C-33 G
W y o y (USE ASTM C-33 _ x1 MIN. SAND BE 'A:0. ^'i."'+•~. bn? .'l. •>I•:rh,t'.5,1, SAND) r
~o CONC. SAND) w W Q V W W y 0000 0 0 000 i 4=0 0000000000 0 cV J
w W y w 0 00000000000 0 000000 O N x
W W w w W u w 6.0' 6 PERFORATED y 18.0' »
6 PERFORATED z ui 0 #57 STONE PVC PIPE (SEE PLAN a. r
W w o W #57 STONE PVC PIPE SEE PLAN w co [DB E N 3 31.0 VIEW FOR INVERTS)
w BIORETENTION #2 15.0 AVG. w VIEW FOR INVERTS) w W a y TOP=762.60 TOP=767.5 I I I i C
y w W w BOTTOM-762,10 W BOTTOM=7 .00 W SECTION E-E
SECTION C-C W W ^ W ,l N.T.S. \ W y ; W N.T.S.
W i W
W W ma imm
W W W W y W y » r
y y 6" PONDED „ 6 PONDED » ~
WATER DEPTH 3 OF 12 MONTHS AGED MULCH W W 6 WATER DEPTH 3 OF 12 MONTHS AGED MULCH NMI 'EL > .J
w W y I W W Z
W W _ I=_ II-`I 6 TOP EL.=762.60 `t=I11=1~1-I1 W TOP EL.=767.50
X y w BOTTOM EL.=762.10 111
-III 77 1:7-12 -3:1 SLOPE BOTTOM EL.-767.00 I I-! I f - . 3:1 SLOPE L W W W -
i~ 7. 71 7. W W .11 . ""''24 , = III-
4A y W =III = -_=._':4' MIN.. :_=_•`-I W W w w -=PLANTIN .I MIN. _ .III -PLANTING SOIL=- -
x=111 _ _ _ G SOIL_..___,_ W w YARD INLET THROAT 762.80 .III-1 - - - ` - -I I~ - - III LL.
= _ ll w FOR EMERGENCY OVERFLOW ; - 7. - ~I I -III II 0
6" 1/4" PEA GRAVEL YARD INLET THROAT = 1 6 1 /4 PEA GRAVEL 00 MIN, SAND BEDy
1 MIN. SAND BED - MIN. 9 FOR EMERGENCY OVERFLO ..46 , 606 - T f ~p q,. MIN. 9»
W W \ _._.._.._._-.j w w
w W W 0 n n -,j MOP I i
ATED 1 66.0 6 PERFORATED
y y y 115.0' 6" PERFORATED y PVC PIPE PVC PIPE
#57 STONE--///~ w W #57 STONE m
W W y SECTION D-D SECTION F-F
w w w y w N.T.S. W W W N.T.S. Z
W 1
BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION BIORETFN110N FILTER DRAINAGE SYSTEM CONFIGURATION 0 z BIORETENTION #3 J 1
SCALE: AS SHOWN
BIORETENTION #2 SCALE: AS SHOWN SCALE: 1"=10'
W 1
SCALE: 1"=10'
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE
SHEET: D9 OF D20

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/ ON PAVEMEN ~ v ON PAVEMENT STRIPE p. ~I..o
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wk's 80TTOM=752.10 A~ / ~ 5 p M
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59 ° epee y ~ v ee7~ .y
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® TOP= 8.70 y ' ~ s°~ J r- ~0 = .V ~yJO
Q~' - ~ , 0~ 0 BOTTOM- 58.20 Q 61Q s y-' °eW O 0
G~ y s o~ o° 4' WI OPENING y ~!~°°vy vo°
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/ d~ ~ i TOP-7so.so ~ 1 s1 BOTTOM=760.10 ~ .V .V y J. ~Y
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6\ ~ y y ~ \ y y y
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/ 4 W~DE 0 ENING 6 655 86 IN CUR TYP, .V y Q. i y
/ ~ D 4 OPENING TO BE TER y J' y y N
/ ON PAVEM NT STRIPE IN CURB ~(TYP.) 4 / ` 64 \ .V ,V y y ~ W y y y ~ ~ y W y O
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~ 1 / ~ TOP=764. y y y y y
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/ -788' ~ ss- .V y y y y
/ \ .V .Y .V VI
\ Q ¢t lx y y y yTOP~759.60
674 . / ~ ~ / \ 3 y y y y y BT)TTOM=759.10 Q y y y .V
/ \ ~ ~ J o• \ W y y y y
~ ~ ~ ~ TOP=76 20 \ •~o Q~ BOTTOM= 65.70 J' •Y y y' y
~ 68 s7 P y 'V y ~ M y y y DD O
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- TOP-768. y J~ y Z a QZtnln O~ OONI \ y y y W Q ~a~^ N U U _MM I I N N
BOTTOM-7 7.50 695 y y y YARD INLET IHROAT = 759.80 Vvi W o ~ ~ Z ~ ~ ~~J c M coo
` \ y `Y y FOR EMERGENCY OVERFLOW ~ 4z 'L d ~ ~ 3 ~°v W o 0 D M Y~ ~ O '7 M
71 \ ~ ~ y J ~W ~ vi ~O~ti
\ / ~
V 71 10Z ~ ~ ~
6'
~ ~
' G ~ 4 WIDE OPENIN IN CURB (TYP.) 72 \ \ o WMI
TO BE CENTERED 5TOP=769.70 - mod' FM ~ SCALE: 1'~ 10' M _ °
11 BOTTOM=769.20 T STRIPE ~ ~ ON PAVEMEN Q ~ ~ .z ; Q a
~ a ~ o" H
13 , • 4' WIDE OP ~ U U X
IN CURB TYP. \ ( ) _ \ n X Z Y~ x 3 OF 12 MONTHS AGED MULCH a a _ 6 PONDED ~ ~ ~ Q J J Q . Li
6 6' BIORETENTION SIZING COMPUTATIONS WATER DEPTH PROP. CURB = ~ ~ ~ ~ ca ~ $ O O O cn O N
' BIORETENTI ~7 _ ~ / o a~ o <o ~ \ ~~~zi i ~~jJOi i _ o: O J CAD I- I I
TOP-771.80 - =771 ~ DRAINAGE AREA A C-FACTOR « 5% (WITH SAND BED) _ TOP EL.-759.60 -I _ ~C (v~ o a a N W _ _I-~ _ ~ III =i ~ F~ Z Z I~ I~ ~ O a L~ N N - . = co Ul Lr) N N
/ eorroM =SIZE OF BIORETENTION AREA _ _ _ 111-;~ , _ _ _ _ _ _ _ _ _ , I i ~ o W W o-~-, B'ST10M EL. 759.10 i ~I, - _ - 3:1 SLOPE ~ o~ ~ 0000
~A ` • \ ~
6 0.73 AC * 0.85 * 0.05 = 0.031 AC. = 1,351 SF u-C4 C14 F o NmCN N N
=11f =:4' MIN.=:-
! -._-PLANTING SOIL=
1 -III- - - - - - - i l
O~p 6 1/4' PEA GRAVEL
USE ASTM C-33 - 1 MIN. SAND
J CONC. SAND ~-T 3
BIORETENTION PLANTING COVER COMPUTATIONS o 0 0o o o a o o 0 0 0 o a= 0 a o o c a o cv
T10N AREA #8 = 1,541 SF = 0.035 AC. LLJ 0 BIORETEN PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. 6.0 6" PERFORATED
= 5 PLANTINGS #57 STONE PVC PIPE (SEE PLAN TOTAL PLANTINGS REQUIRED 3 15.0 AVG.
TS) TOTAL PLANTINGS PROVIDED - 35 SHRUBS TREES VIEW FOR INVER / -
SECTION 0-0 W
N.T.S. I m
BIORETENTION #7
SCALE: 1"=20'
6" PONDED J
WATER DEPTH 3 OF 12 MONTHS AGED MULCH
6" PONDED 3" OF 12 MONTHS AGED MULCH 6" PONDED WATER DEPTH PROP. CURB WATER DEPTH 3" OF 12 MONTH
EL.=759.60 - I I OF 12 MONTHS AGED MULCH TOP _ - ..III-{ I ~ Z
BIORETENTION SIZING COMPUTATIONS X", ~fl_ BOTTOM EL.-759.10 11=1 I I = _ - = _ - 3:1 SLOPE
TOP EL.=VARIES TOP EL.=VARIES
DRAINAGE AREA A C_FACTOR 5% (WITH SAND BED) [TOP EL =VARIES :L.=VARIES -
= SIZE OF BIORETENTION AREA BOTTOM EL.=VARIES I I_f I - - - - - 3.1 SLOPE BOTTOM EL.=VARIES ! TOP EL.=VARIES 4 MIN. . _ II=1 - _ _,111=111: V. PLANTING SOIL_::_' r - O
1.96 AC 0.85 0.05 = 0.083 AC. = 3,629 SF II- 4 MIN..-~ . 111,111 111111 HIE (E r-
- i PLANTING SOIL_ El 1 IN.-- - _ - 3:1 SLOPE - 6 1/4 PEA GRAVEL 1/4" PEA GRAVEL L)
_7 7 =LC=1: . ill= III-I ' PLANTING SOIL=- _ . _.._.._.,_~IJ-I G SOIL - - . _ X11 ,1MIN. SAND BED; ..t........,
" 7~ 7- 7 MIN. 9" - Lq
=ii 6 1/4" PEA GRAVEL - USE ASTM C-33 - 1 MIN. SAND"BED;,,;>;,':'! ~Ill~ = rte r s~° I 6 1 /4 PEA GRAVEL
-11 1 MIN. SAND BE BIORETENTION PLANTING COVER COMPUTATIONS CONC. SAND} - - AND „ D
o a o 0 0 o i--- - 6" PERFORATED 112.0 co IN= #57 STONE PVC PIPE uJ o z
R TENTION AREA 7 = 3,842 SF = 0.088 AC. BIO E # ° o°o°a°o°o°o° o iv
PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. TOTAL PLANTINGS REQUIRED = 88 PLANTINGS 5.0 6 PERFORATED
TOT , AL PLANTINGS PROVIDED = 88 SHRUBS / TREES #57 STONE PVC PIPE (SEE PLAN 38.0 6" PERFORATED PVC PIPE SECTION P-P W 3.0 N.T.S. J W
10.0 AVG. VIEW FOR INVERTS) 57 STONE J
SECTION N-N f 11 0 z ION N-N CTYPJ
SECTION M-M CrYP.) I.T.S SIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION . V
N.T.S N.T.S. N.T.S. SCALE: AS SHOWN W W
1310RETEN7I0N FILTER DRAINAGE SYSTEM CONFIGURATION
SCALE: AS SHOWN
SHEET: D11OF D20 D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE

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SCALE: 1"=150' Z 1"=150' =i
2 LU 0
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PRE-DEVELOPMENT AREA TO H TO OUTFALL 153.19 AC. 0 0
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1-YEAR RUNOFF 2-YEAR RUNOFF 10-YEAR RUNOI 44 0% ,R RUNOFF 50-YEAR RUNOFF 100-YEAR RUNOFF Ir
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INFLOWS TO; MAIN DUTFALL INFLOWS TO: MAIN DUTFALL INFLOWS TO, MAIN DUTFALL am Uj N
Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume INFLOWS TO: MAIN OUTFALL INFLOWS TO: MAIN OUTFALL
HYG file HYG ID HYG tag cu,ft min cfs HYG file HYG ID HYG tag cu.ft min cfs HYG file HYG ID HYG tog cu. ft ~e 0 Z Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peak Time Peak Flow ~ cu. ft min cfs HYG f t le HYG ID HYG tag cu, ft min cfs H V¦
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PRE, HYG SUBAREA 1 1 YR 5454 750. 00 43 PRE. HYG SUBAREA 1 2yr 10486 744. 00 1. 23 PRE, HYG SUBAREA 1 10 r 32933 739, 00 5. 62 PRE. HYG SUBAREA 1 50yr 62265 738, 00 11. 66 PRE, HYG SUBAREA 1 100 r 71514 738, 00 13, 56
PRE. HYG SUBAREA 10 y 3293. lYR 4606 890, 00 . 14 PRE, HYG SUBAREA 2 2yr 13971 764, 00 1, 11 PRE, HYG SUBAREA 2 10Yr 4547 45477 756.00 5. 24 PRE. HYG SUBAREA 2 50 r 87184 755.00 11.25 Y Y PRE, HYG SUBAREA 2 100yr 100399 755, 00 13, 16
PRE. HYG SUBAREA 11 lYR 5803 905,00 17 PRE. HYG SUBAREA 3 2yr 14960 796,00 ,91 PRE, HYG SUBAREA 3 10Yr 48691 PRE, HYG SUBAREA 12 1YR 6088 915. 00 18 PRE. HYG SUBAREA 4 2yr 19875 799. 00 1, 22 PRE. HYG SUBAREA 4 10Yr 6242; 48696 783, 00 4. 08 PRE. HYG SUBAREA 3 50yr 93355 783, 00 8, 65 PRE, HYG SUBAREA 3 100 r 107505 783, 00 10, 11
PRE, HYG SUBAREA 2 lYR 7049 775. 00 39 PRE, HYG SUBAREA 5 2yr 14334 775. 00 1. 04 FRE, h'(G SUBAREA 5 10Yr 46651 ' 62423 787.00 5, 18 PRE, HYG SUBAREA 4 50 r 118021 787 00 10 9 r :IV7 r" Ip,,A~Y y 6 P P C G r1 L 774 Or"
PRE, HYG SUBAREA 3 1YR 7548 810, 00 35 PRE. HYG SUBAREA 6 2yr 13040 796, 00 . 70 PRE, HYG SUBAREA 6. 10Yr 4597! 46659 766.00 4. 84 PRE. HYG SUBAREA 5 50yr 89449 766.00 10.27 PRE. HYG SUBAREA 5 100 r 103008 765, 00 11,99
PRE. HYG SUBAREA 4 1 YR 10336 800.00 49 PRE. HYG SUBAREA 7 2yr 22985 809, 00 1. 24 PRE. HYG SUBAREA 7 10Yr 6982: 45979 783.00 3. 59 PRE, HYG SUBAREA 6 50 r 90819 782.00 Y y 8, 06 PRE, HYG SUBAREA 6 100yr 105171 782, 00 9, 52 69821 809.00 4, 85 PRE, HYG SUBAREA 7 50yr 130265 808.00 9, 76 PRE, HYG SUBAREA 7 100 r 149240 807, 00 11, 31
PRE. HYG SUBAREA 5 1 YR 7232 785, 00 38 PRE. HYG SUBAREA 8 2yr 20231 802.00 1, 20 PRE. HYG SUBAREA 8 10Yr 6354; 63543 788.00 4.98 PRE. HYG SUBAREA 8 50 r 120137 788.00 10,36 Y
PRE. HYG SUBAREA 6 1YR 6124 820.00 24 PRE. HYG SUBAREA 9 2yr 9646 797.00 46 PRE, HYG SUBAREA 9 10 r 3737( Y PRE, HYG SUBAREA 8 100yr 137984 788, 00 12.07 37370 785.00 2. 90 PRE, HYG SUBAREA 9 50yr 76301 785.00 6.82 PRE. HYG SUBAREA 9 100yr 88897 785, 00 8, 11 2 z
PRE, HYG SUBAREA 7 1YR 12285 825, 00 PRE. HYG SUBAR Y .55 EA 10 2yr 10753 835,00 .44 PRE, HYG SUBAREA 10 l0yr 4166: 41661 806.00 2.57 PRE, HYG SUBAREA 10 50yr 85062 806,00 6.02 PRE. HYG SUBAREA 10 r 4
PRE. HYG SUBAREA 8 1YR 10520 815.00 50 PRE, HYG SUBAREA 11 2yr 13547 862,00 52 PRE, HYG SUBAREA 11 10Yr 5248`, PRE, HYG SUBAREA 9 lYR 4132 835.00 13 PRE. HYG SUBAREA 12 2yr 12966 903.00 47 PRE, HYG SUBAREA 12 10Yr 4572 52485 22. 100y 9910 806, 00 7, 17 0 W 8 00 2. 89 PRE, HYG SUBAREA 11 50yr 107161 822, 00 6. 72 PRE. HYG SUBAREA 11 100 r 124852 822, 00 7, 99 u
45724 881.00 2. 11 PRE, HYG SUBAREA 12 50 r 90316 853.00 4.52 Y J Y PRE, HYG SUBAREA 12 100yr 104589 853, 00 5, 33 i
PRE-HYG MAIN DUTFALL lYR 87177 815.00 3.34 PRE. HYG MAIN DUTFALL 2 r 176796 796.00 8.74 c
PRE, HYG MAIN DUTFALL 10yr 59277( 592770 783.00 40.07 PRE. HYG MAIN OUTFA L L SOyr 1150337 774.00 86.80 PRE, HYG MAIN OUTFACE 100yr 1327819 774, 00 102.05
0)
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File No. NC Tax Slap No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPRE XREF: DRAINAGE PLAN STATE/03001BASE
SHEET: D12 OF D20 20

PREDEV
ELOPMENT TIMES OF CONCENTRATION Tc
SUBAREAI
----------------
Segment #1: Tc:
TR -55 Sheet
Mannings n
.4000
Hydraulic Length
300.00
ft
2yr, 24hr P
3,1200
in
Slope
.055000
ft/ft
Avg. Velocity
.14
ft/sec
--------------------------------------------------------------
------------
Segment- #1 Time:
34.94 min
Segment #2: Tc:
TR -55 Shallow
Hydraulic Length
620.00
ft
Slope
.058000
ft/ft
Unpaved
Avg. Ve loc t ty
3,89
ft/sec
-------------------------------Segment-
#2 -Time:
--------------------
2.66 min
Segment #3: Tc:
TR -55 Channel
Flow Area
45.0000
sq. f t
Wetted Perimeter
22.42
ft
Hydraulic Radius
2. 01
ft
Slope
. 019000
ft/ft
Mannings n
.0450
Hydraulic Length
264.00
ft
Avg,Velocity
7.26
f t/sec
--------------------------------------------------------------
Segment #3 Time:
.61 min
Tota l Tci
38,21 m I n
SUBAREA 2
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 i n
Slope 041000 ft/ft
Avg,Velocity .13 ft/sec
Segment #1 T i me: 39.30 min
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 631.00 ft
Slope .055000 ft/ft
Unpaved
Avg,Velocity 3.78 ft/sec
Segment #2 T i me: 2,78 min
--------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area
20-0000 sq, f t
Wetted Perimeter 14.94 ft
Hydraulic Radius 1. 34 ft
Slope .015000 ft/ft
Mannings n 4500
Hydraulic Length 270.00 ft
Avg,Velocity 49 ft/sec
Segment #3 T i me: 9.14 min
-------------------------------
Tota l Tci 51, 22 m in
SUBAREA 3
--------------------------------------------------------------
Segment #l: Tc, TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope . 026000 ft/ft
Avg,Velocity .11 ft/sec
Segment #1Time: 4715 min
------------------------------- - ----- _
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 682.00 ft
Slope .050000 ft/ft
Unpaved
Avg, Velocity 3,61 ft/sec
Segment #2 Time315 min
------------------------------- ------- _
Segment #3: Tc: TR -55 Channel
Flow Area 5,0000 sq. f t
Wetted Perimeter 7.47 ft
Hydraulic Radius .67 ft
Slope . 015000 ft/ft
Mannings n .4500
Hydraulic Length 343.00 ft
Avg,Velocity 31 ft/sec
Segment #3 T i me: 18,42 min
File No. NC
Total Tc: 68.73 m i n
Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001SWMPRE
Segment #1i Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300,00 ft
2yr, 24hr P 3.1200 in
Slope .020000 ft/ft
Avg, Velocity .10 ft/sec
Segment #1 Time; 52. 37 min
---_
-------------------------------------------------
Se-
g #21
Tc TR -55 Shallow
Hydraulic Length 972.00 ft
Slope . 033000 ft/ft
Unpaved
Avg,Velocity 2.93 f t/sec
Segment #2 Time, 5, 53 min
Tota l Tci 57.90 m in
SUBAREA 5
------------------------ ----------------------
Segment #1: Tc:
TR -55 Sheet
Mannings n
.4000
Hydraulic Length
300.00
ft
2yr, 24hr P
3,1200
in
Slope
063000
ft/ft
Avg, Ve toc i ty
.15
ft/sec
--------------------------------------------------------------
Segment #1 Time:
33, 10 min
Segment #2: Tc:
TR -55 Shadow
Hydraulic Length
276,00
ft
Slope
. 062000
ft/ft
Unpaved
Avg,Velocity
4,02
ft/sec
--------------------------------------------------------------
Segment #2 T i me:
1,15 min
Segment #3: Tc:
TR -55 Channel
Flow Area
45-0000
sq. ft
Wetted Perimeter
22.52
ft
Hydraulic Radius
2.00
ft
Slope
.010000
ft/ft
Mannings n
.4500
Hydraulic Length
764.00
ft
Avg,Velocity
53
ft/sec
--------------------------------
Segment #3 Time:
min
-----
-Total-Tu -----58_48-min-
SUBAREA 6
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n 4000
Hydraulic Length 30u. Cc it
2yr, 24hr P 3,1200 in
Slope ,023000 ft/ft
Avg,Velocity .10 ft/sec
Segment # 1 T i me: 49,53 min
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 719.00 ft
Slope .075000 ft/ft
Unpaved
Avg,Velocity 4,42 f t/sec
--------------------Segment-#2 Time: 2.71 min
Segment #3: Tc: TR -55 Channel
Flow Area 20.0000 sq. ft
Wetted Perimeter 14.94 ft
Hydraulic Radius 1. 34 ft
Slope . 008500 ft/ft
Mannings n ,4500
Hydraulic Length 472.00 ft
Avg. Velocity .37 ft/sec
Segment #3 Time; 21.22 min
---
Total Tu 73. 45 m i n
SUBAREA 7
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope .017000 ft/ft
Avg,Velocity .09 ft/sec
Segment #1 Time: 55, 89 m i n
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 526.00 ft
Slope .068500 ft/ft
Unpaved
Avg, Velocity 4.22 f t/sec
Segment #2 Time: 2. 08 min
--------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 5.0000 sq. f t
Wetted Perimeter 7.47 ft
Hydraulic Radius .67 ft
Slope 017500 ft/ft
Mannings n .4500
Hydraulic Length 516.00 ft
Avg. Velocity 34 ft/sec
Segment #3 Time: 25. 66 min
--------------------------------------------------------------
Tota l Tci 83.63 m i n
SUBAREA 8
----------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3. 1200 i n
Slope 033000 ft/ft
Avg, Velocity .12 ft/sec
Segment #1 T i me: 42, 87 min
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 673.00 ft
Slope . 043000 ft/ft
Unpaved
Avg. Ve toc i ty 3.35 ft/sec
Segment #2 T i me: 3. 35 min
------------------------------
Total Tci 46.22 m i n
SUBAREA 9
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope 037000 ft/ft
Avg, Ve loci ty .12 ft/sec
Segment #1 Time: 40, 95 min
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 973.00 ft
Slope 057000 ft/ft
Unpaved
Avg. Ve loc i ty 3,85 ft/sec
Segment #2 Time: 4
------------------------------- ----- _ 21min
-
Segment #3: Tc: TR -55 Channel
Flow Area 45.0000 sq, ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .033000 ft/ft
Mannings n .4500
Hydraulic Length 245.00 ft
Avg, Ve loci ty .96 ft/sec
Segment #3 Time: 4_ 27 min
------
Total Tci
49.42 m i n
SUBAREA 10
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n 4000
Hydraulic Length 300,00 ft
2yr, 24hr P 3,1200 in
Slope 040000 ft/ft
Avg. Velocity .13 ft/sec
Segment #1 Time: 39. 69 m i n
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 517.00 ft
Slope .066000 ft/ft
Unpaved
Avg, Velocity 4,15 f t/sec
Segment #2 T i me: 2. 08 m i n
--------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 45.0000 sq. f t
Wetted Perimeter 22. 42 ft
Hydraulic Radius 2.01 ft
Slope 026000 ft/ft
Mannings n .4500
Hydraulic Length 1135.00 ft
Avg, Ve l oc i ty .85 f t/sec
Segment #3 T i me: 22.27 m i n
Tota l Tci 64.04 m i n
SUBAREA 11
-------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300. 00 ft
2yr, 24hr P 3. 1200 I n
Slope 057000 ft/ft
Avg, Velocity .15 f t/sec
Segment #1 Time: 34. 45 min
--------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1002.00 ft
Slope . 036000 ft/ft
Unpaved
Avg. Velocity 3. 06 ft/sec
Segment #2Time 5 46 min
----------------------------------------_-
Segment #3: Tc: TR -55 Channel
Flow Area 45,0000 sq. f t
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .016000 ft/ft
Mannings n .4500
Hydraulic Length 629,00 ft
Avg. Velocity .67 ft/sec
Segment #3 T i me: 15,73 min
Total Tci 55, 63 m i n
SUBAREA 12
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope 013000 ft/ft
Avg. Velocity 08 ft/sec
Segment #1 Time:
---------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 673.00 ft
Slope .031000 ft/ft
Unpaved
PREDEVELOPMENT
TRAVELTIMES Tt
TRAVEL TIME 1
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 0,0000 sq. ft
Wetted Perimeter 0.00 ft
Hydraulic Radius 0.00 ft
Slope . 000000 ft/ft
Mannings n .0000
Hydraulic Length 0. 00 ft
Avg. Velocity .00 ft/sec
--------------------------------------
Total Tti------0_00-min
-
TRAVEL TIME 2
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq, ft
Wetted Perimeter 22, 42 ft
Hydraulic Radius 2.01 ft
Slope .021000 ft/ft
Mannings n .4500
Hydraulic Length 570.00 ft
Avg.Velocity 76 ft/sec
-------------------------------------------
Total Tti 12.44 m I n
TRAVEL TIME 3
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45.0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2. 01 ft
Slope . 016000 ft/ft
Mannings n 4500
Hydraulic Length 1168,00 ft
Avg, Velocity 67 ft/sec
--------------------------------------
Tota I Tti 29.21 min
TRAVEL
--------------------------------------TotalTti29_21min
TRAVEL TIME 4
--------------- --------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45.0000 sq, ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .017000 ft/ft
Mannings n .4500
Hydraulic Length 1808.00 ft
Avg. Velocity . 69 ft/sec
--------------------------------
Total-Tti---- 43_87 min
TRAVELTIME 5
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq, f t
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope ,010000 ft/ft
Mannings n .4500
Hydraulic Length 481.00 ft
Avg. Velocity .53 ft/sec
62_ - 22min-
Total Tti-----15_22-min
-
Avg,Velocity 2. 84 ft/sec
Segment #2- T i me_------ 3_ 95- min
--------------------------------------- ----
Total Tci
-----66_17 min
TRAVELTIME 6
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq. ft
Wetted Perimeter 22,42 ft
Hydraulic Radius 2.01 ft
Slope 015000 ft/ft
Mannings n .4500
Hydraulic Length 1073.00 ft
ray. �c ty
.65 ft/sec
Total-Tt:-----27_71-min
_
TRAVEL TIME 7
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45.0000 sq, ft
Wetted Perimeter 22,42 ft
Hydraulic Radius 2.01 ft
Slope .013000 ft/ft
Mannings n .4500
Hydraulic Length 1739.00 ft
Avg. Velocity .60 ft/sec
------------------------------------------
Tota I Tti 48_25 min
TRAVELTIME 8
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45.0000 sq, ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2. 01 ft
Slope . 014000 ft/ft
Mannings n 4500
Hydraulic Length 2366.00 ft
Avg,Velocity 62 ft/sec
------------------------------------------
Total Tt: 63, 26 m i n
0
TRAVEL TIME 9
------------------- ----------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft z
Slope . 010000 ft/ft P=
Mannings n .4500
Hydraulic Length 1489.00 ft W
0
Avg.Velocity 53 ft/sec
0
------------------------------------------ z
co
-Total Tti---_-47_10 Min_
U
TRAVEL TIME 10 a .0 o
4 o N
U
j �M
N�
Segment #11 Tc: TR -55 Channel _ � z W o
Z W 5 PC J=
ZE
Flow Area 45. 0000 sq. ft U °dr Q w Lo� Z F z o N
Wetted Perimeter 22. 42 ft Z Z a z CMD -1 1 0 o o,,
Hydraulic Radius 2. 01 ft W a ��o^oc^o v c��',N,N
V W �o co Z 05 z a: co 00
Slope .010000 ft/ft O c o-:: . 5 -'W
Mannings n 4500 � Q � o �
Hydraulic Length 2132.00 ft p
Avg. Velocity . 53 ft/sec Q
------------------------------------------ M o
0
,
a
----------------------- �-d
W M W M
_Total Tt�----_67_44-min- I- M o
a CL N�
0 �-= 0 C_
V UL>
� coQ
TRAVEL TIME 11 J o N o
U WEN m =soon
------------------------------------------ f� H zo O a' = W cOI;
t.- n
NWn
znl� QLi-NN
C�lW,jwoO�co
Segment # 1: Tc: TR -55 Channe t*A: c o m N
Flow Area 45,0000 sq, ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2. 01 ft Q
Slope . 010000 ft/ft
Mannings n .4500 z �.
Hydraulic Length 3114.00 ft W J
Avg,Velocity .53 fWt/sec O
a oc
a
------------------------------------------ ® V
-Total Tt:-_---98_51 min- W mi :�•�
J F-
W 0 0
TRAVEL TIME 12 > 'j Z
------------------------------------------ W 9C W%
CC Uj'Q >-
= P
Segment #1: Tc: TR -55 Channel V Z
va
Flow Area 45. 0000 sq. ft U
Wetted Perimeter 22.42 ft 0
Hydraulic Radius 2.01 ft 0 4 O
S lope .010000 ft/ft V
Mannings n ,4500 O
Hydraulic Length 4647.00 ft
'� 5? rt/Se_
W
------------------------------------------ o0
� Z
W
Total -Ttl---_147_00 min- ca J
Q
� V
W
SHEET:D13 OF D20

C n a I
r n o
s X I
r' ~ ~ ~ ~ ~ o
1?" i,/ ~ ~ ~ MAJOR DRAINAGE DMDE ~ U
U \ = Z
r a ~ U
~ ~ - O ~ ~ MAIN OUTFACE a Q c
i w ~ ~ d
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~ . ~ . ~ ~ ~ ~ WETLANDS TO REMAIN cn C
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t ~ ~ ~ C ~~MM ~ V O~MM z ~r`~ 3 NZOo ~ O I a ~a0~0~ ~A ~WMM M > O ~ M
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= = JOB G C.~JO~ O cD
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:V N
CN Rio siz.4 ur5 rIIIIIIIIIIIIIIIIIII`
Q
2= 102.1 98 CFS :FS ui a
J
l 010= 158.3 CFS TO EDW #2 a ui o
0c 0 C
- ~ ` A=11.46 Ac W a ~ t
SUBAREA 1D'
W J = CN = 98 W C
AREA =10.57 Ac j N
O1 = 37.9 CFS o =J ~ o C
CN = 98 SUBAREA 3E
,i Q2=46.1 CFS 0 > ~ °z
AREA 0.00 010= 65.9 CFS CN = 4.17 Ac
SUBAREA 3D Quo 71.5 CFS a LU v =
~r , 02= 42.5 CFS
AREA = 6.45 Ac TO EDW #3 o a LL
Qp =16.8 CFS
CN 98 O J ° v NONE FF wwo; -0 Q2= 25.9 CFS A = 73.89 Ac F 2 low
Q10= 26.0 CFS
~
~
010= 40.2 CFS CN = 98 w ~ Z3
~ O1 = 244.34 CFS co O w
u
ames ( 02 -29720 CFS U Z Y
u
9 ~ POST-DEVELOPMENT DRAINAC AINAGE AND FLOW PATH Oro 460.79 CFS ~
SCALE: 1"=1 00' 2 SHEET: Dl 4 OF D20
File No. m , Job No. 03-001 Caaa s File: oa>Irv>GE,o3001 SWIVI POST ,aE. DRAINAGE PLAN S.a;E,03001e.sE i20

i STORM
1 -YR STORM
EXTENDED DETENTION WETLAND 02
POSTDEVELOPMENT: A =11.46 Ac Tc = 5 MIN. CN=98
EXTENDED DETENTION WETLAND #2 EDW #2 - T HYDROGRAPH �
Elevation
ft
Outflow
Storage
Area
________________________
Infllt,
Q Total
2S/t + 0
---------------cfs-
------------------------
cu, ft
sq, ft
cfs
cfs
cfs
733, 00
733. 10
00
02
0
2301
22895
00
00
1 00
733, 20
03
4629
23145
23397
00
00
02
76.74
733-30
04
6981
23650
00
03
04
154, 34
733.40
, 04
9360
23905
,
• 00
2,56
232, 74
733, 50
733, 60
.05
11762
24160
.00
.04
, 05
312.03
392.13
733, 70
.05
, 06
14191
16646
24418
24676
00
05
473, 08
733.80
.06
19126
24936
.00
00
06
554.93
733, 90
.06
21634
25197
.
, 00
.06
637.60
734, 00
734, 10
07
07
24166
25460
00
.06
.07
721.19
805.60
734,20
,
07
26724
29309
25714
2596900
00
, 07
890.88
734, 21
, 07
29569
25994
07
977, 05
734.30
12
31918
26225
.00
00
07
12
985. 72
734,40
12
34555
26482
,
00
12
1064,06
734.50
13
37215
26741
00
13
1151-94
734-60
14
39901
27000
00
14
1240.63
734, 70
15
42615
27262
00
15
1330,19
734, 80
16
45354
27524
, 00
16
1420, 67
734, 90
17
48121
27788
00
17
1511, 96
735, 00
18
50912
28053
, 00
18
1604, 19
735.10
735, 20
19
20
53730
28319
00
19
1697-24
1791. 18
735, 30
.20
56576
59448
28586
28855
00
20
1886, 06
735, 40
21
62348
29125
00
00
.20
1981.78
735, 50
.22
65273
29396
00
21
22
2078, 46
735. 60
735, 70
22
23
68225
29669
00
22
2175, 97
2274, 40
735, 80
•
.23
71207
74214
29942
30217
00
23
2373, 79
735, 90
, 24
77251
30494
00
00
; �4
2474, 04
736.00
24
80313
30771
00
2575.26
736, in
a�
24
2677, 35
736,
2 -YR STORM
736, E
736, 7
736, E
736.5
737, 0
737, 1
737, 2
737, 3
737, 4
737. 5
10 -YR STORM 737. S
737, 61
737, 71
737, 81
737, 9(
738, 0(
738, 1(
738, 2(
50 -YR STORM 738, 2E
738.3C
738,40
738.50
738, 6
738, 7
738. 8
738, 9
739. 00
•36
,50
89664
92837
31574
31844
00
00
.67
96034
32115
,00
86
99258
32388
.00
1,06
102512
32661
00
1,28
105791
32936
00
1,49
109099
33212
00
1,71
112434
33489
00
1,93
115796
33767
00
2,15
119187
34046
00
2,36
122605
34326
00
2,56
126053
34608
00
2,76
129527
34890
00
2.90
132328
35117
, 00
3,05
133029
35174
00
4,68
136562
35459
00
7,15
140122
35745
00
10,21
143712
36033
00
13.74
147329
36321.
.00
17,68
150974
36600
00
36
50
.67
86
1, 06
1, 28
1, 49
1, 71
1, 93
2, 15
2.36
2, 56
4, 68
7, 15
10, 21
13.74
17. 68
21, 98
24, 10
' .+v IJOJJl J/I6i 00 O O
0
31.52 162082 37445 00 331, 52
D 36, 71 165840 37728 . 00 36, 71
0 42, 14 169626 38013 00 42, 14
0 47, 82 173443 38299 , 00 47, 82
D 53, 71 177286 38585 00 53, 71
0 59, 81 181161 38873 00 59, 81
66, 09 185061 39162 00 66, 09
1' STORM ROUTING SUMMARY
INFLOW/OUTFLOW HYDROGRAPH SUMMARY
------------------
Peak Inflow 13.57 cfs at 715.00 M I n
Peak Outflow = .07 cfs at 1051.00 M i n
--------------------------------------
Peak Elevation = 734.21 ft
Peak Storage = 29495 cu, ft
1 -YR STORM ROUTING SUMMARY
INFLOW/OUTFLOW HYDROGRAPH SUMMARY
------------------------
Peak Inflow =90 cfs at 715.00 M I n
Peak Outflow = .26 cfs at 1421.00 M i n
------------------------------------
Peak Elevation = 736,18 ft
Peak Storage = 86013 cu,ft
2 -YR STORM ROUTING SUMMARY
INFLOW/OUTFLOW HYDROGRAPH SUMMARY
------------------------
Peak Inflow =46.09 cfs at
715.00 M I n
Peak Outflow = .71 cfs at 1012-00 M I n
--------------------------------
Peak Elevation = 736,52 ft
Peak Storage = 96640 cu, ft
10 -YR STORM ROUTING SUMMARY
INFLOW/OUTFLOW HYDROGRAPH SUMMARY
--------------------------------------------
-------------------
Peak Inflow = 71.47 cfs at 715.00 M i n
Peak Outflow = 2.90 cfs at 795.00 M I n
----------------------------------
Peak Elevation = 737,58 ft
Peak Storage = 132292 cu, ft
1' DRAWDOWN OVER 2 TO 5 DAYS
2989.17
3095.05
3201.79
3309. 46
3418, 12
3527, 63
3638, 13
3749, 49
3861. 77
3975, 05
4089.18
4204, 32
4320.32
4413.83
4437, 35
4556, 75
4677, 87
4800, 60
4924.69
5050, 14
5176.95
5251, 33
5304, 94
5434.25
5564.69
5696.33
5829.24
5963-23
6098-48
6234.79
OUTLET COMPUTATION
DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY
(A)
1" STORAGE REQUIREMENT (S)
(a)
35,360 CF (SEE SHEET 5)
(B)
MAXIMUM HEAD (h) AT THE REQUIRED 1" STORAGE FROM
THE ELEVATION -STORAGE CURVE FOR THE FACILITY
(b)
1.50 FT (734.50 - 733.00)
(C)
RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN
PEArF120
TIMRS [Qp = S/(1.0 x 3600 x 120]
0.0000116 x LINE (a) 35,360 =
(c)
0.0819 CFS
(D)
REQUIRED ZRIFICE AREA (A) [A = Qp/(0.6 x (64.4 x hf" )]
LINE (c) 0.0819 0.6 x (64.4 x LINE (b) 1.50 °-1
(d)
0.0139
(E)
DIAMETER OF A CIRCULAR ORIFICE
2.0 x (LINE (d) 0.0139J3.1415927)'
(e)
0.133 FT
=
1 1/2" DIA. ORIFICE
File No. NC
Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SWMPOSTI
1c
We
8
U
O 6
LL
3C
cn
20
30
20
ILL
10
7C
Tt
all
y 30
U
O 20
LL
10
C
10
0
0
2
500 1000 1500 2000
Time (min)
EDW #2 -1-YR HYDROGRAPH
500 1000 1500 2000
Time (min) -
EDW #2 - 2 -YR HYDROGRAPH
500 1000 1500
Time (min)
EDW #2 -10-YR HYDROGRAPH
2000
500 1000 1500
e (min)
2000
RISER STRUCTURE FLOTATION CALCULATIONS
I. WEIGHT OF WATER DISPLACED
CONCRETE BASE = Ah
_ (6.17 ft)(6.17 ft) (0.67 ft) = 25.51 ft3
MANHOLE = Ah
_ (4.42 ft) 4.42 ft) (4.58 ft)
= 89.48 ft
WHERE h = 10 YR. ELEV. - BMP INV.
= 737.58 - 733.00
= 4.58 ft
TOTAL VOLUME DISPLACED = 25.51 + 89.48 = 114.99
TOTAL WEIGHT OF WATER DISPLACED = (1.3)(114.99 ft3 )(62.4 Ib) = 9,328 Ib
WHERE 1.3 = FACTOR OF SAFETY ft3
II. WEIGHT OF CONCRETE
VOL CONCRETE BASE = A h
= (6.17 ft)(6.17 ft) (0.67 ft)
= 25.51 ft3
VOL MANHOLE WALLS = [A (OUTSIDE WALL) - A (INSIDE WALL)] x H
= [(4.83)(4.83) - (4.0)(4.0)] 6.58
= 48.22 ft3
VOL. CONCRETE PLACED IN BOTTOM OF MANHOLE
VOL. = A h
= (4.0 ft)(4.0 ft) (2.0 ft)
= 32.00 ft3
TOTAL VOL. CONCRETE = 25.51 + 48.22 + 32.00 = 105.73 ft3
TOTAL WEIGHT OF CONCRETE = (105.73 ft3)(150 Ib) = 15,860 lbs
CONCLUSION 9,328 Ib < 15,860 Ib ft3
THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED.
1" STORM DRAWDOWN
1 1/2" DIA, HOLE
z • ; .�
0
� s
Y
Q _U r •
Z F i
ov
BMP TRASH RACK
(SEE DETAIL)
50 YR. WSE= 738.26
10 YR. WSE= 737.58
2 YR. WSE= 736.52
1 YR. WSE= 736.18
PROP. 18"
CL III RCP
24"W X 24"H X 1/4- SOLID GALV.
STEEL PLATE FASTENED WITH
BOLTS AND SEALED WITH SILICONE
TRASH RACK 1 --TRASH RACK
PROVIDE SLUICE
GATE FOR
' EMERGENCY DRAINf��' -'
0.80'
EL. = 736.18
li
4'x4' JUNCTION0.2'W x 0.1'H HOLE ,
5" BOX TYP 4' x4' JUNCTION
24"W X 24"H X 1/4" SOLID GALV. 1" STORM WSE= 734.21 _ BMP TRASH RACK BOX, (TYP)
(SEE DETAIL THIS SHEET.)1" DRAWDOWN (SEE DETAIL) ,
1 - 1 1/2" DIA. HOLEINV- 7.11 nn
"
e u
'e
f •
2.0
-STEPS 1.0' SPACING (TYP.)
6"x 18"x 1/4" GALV. PLATE
(4 AT EACH JOINT BOLTED
TO RISER)
TOP= 737.58
PRECAST RISER SEGMENT
WITH FLAT TOP
/-WATER TIGHT CONNECTION
/ PROP. 18"
CL III RCP
PRECAST RISER
SEGMENTS
`-INV.= 732.90
0 \
A, f
g
PRECAST RISER
2.5' CONC. APRON 8" SEGMENT WITH BASE
(6" THICK) CONC. ENCLOSURE
SHAPE BOTTOM TO POUR IN BASE TO
SLOPE INVERT COUNTERACT
TO OUTLET BUOYANCY
DETENTION CONTROL STRUCTURE NOTE : ALL JOINTS BETWEEN PRECAST
STANDARD 4 x 4 JUNCTION BOX OR EQUIVALENT RISER SEGMENTS SHALL BE
(PRIVATELY OWNED AND MAINTAINED) MADE WATER TIGHT WITH
BUTYL RUBBER 0 -RING
PER NORTH CAROLINA DOT GASKETS.
NOT TO SCALE
METAL GRATING (GALV. STEEL)
WELDED TO 1/4" SOLID STEEL PLATE
(3"x1" MAX. OPENING)
ELEVATION
1/4" SOLID STEEL PLATE
° BOLTED TO STRUCTURE
Ki I e f
24"W X 24"H X 1/4- SOLID
STEEL PLATE BOLTED TO
STRUCTURE WITH SILICONE
( - SILICONE SEALANT
1/2" 1" STORM DRAWDOWN HOLE
METAL GRATING (GALV. STEEL)
WELDED TO 1/4" SOLID STEEL PLATE
(3"x1" MAX. OPENING)
SECTION
NOTES:
1. ALTERNATIVE CAGE CONFIGURATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY
THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS.
2. THIS DETAIL (METAL GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE
RISER.
3. FOR LARGER CAGES (HEIGHT > 5') A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL
BE INSTALLED ON THE FRONT FACE OF THE CAGE.
BMP RELEASE HOLE AND TRASH RACK DETAIL
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SHEET: D150F D20

Elevation Outflow Storage Area Inf~lt, Q Total 2S/t + D
ft cfs cu, ft sq. ft cfs cfs cfs H ~
- 80 U
734, 00 , 00 0 110248 , 00 , 00 , 00 U
734, 10 , 46 11054 110881 , 00 , 46 368, 91 734, 20 , 64 22178 111516 ~ 00 , 64 739, 90 70 . _ _ _ z • - - - U a.
734, 30 , 79 33358 112153 , 00 , 79 1112, 73 Y Y
734, 40 , 91 44610 112792 , 00 , 91 1487, 90 W Q ZQ
734, 50 1, 02 55918 113432 , 00 i. i,2 1864, 95 3 Q 3 Q
60 734, 60 1, 11 67291 114074 , 00 1. 11 2244, 13 ~ U o
734, 70 1, 20 78734 114718 , 00 1, 20 2625, 68 O
734, 80 1, 29 90236 115364 , 00 1, 29 3009, 13 z c " N
N 50 734, 90 1, 37 101809 116012 , 00 1, 37 3394, 98 N
735, 00 1, 44 113439 116661 V , 00 L 44 3782 74 735, 10 1, 51 125135 117312 , 00 1, 51 4172, 67 3 g
EDW #3 IN 1 735, 20 1, 58 136903 117965 _0 40 z
00 1, 58 4565, O1 735, 30 1, 64 148730 118620 , 00 1, 64 4959, 29 1" STORM DRAWDOWN ~ 3 1/2" DIA. HOLE ~
EDW #3 OUT 1 f STORM 735, 31 1, 65 149917 118686 , 00 1, 65 4998, 88 ° S
735, 40 1, 73 160629 119277 , 00 1, 73 30 5356, 02 t d r
735, 50 1, 85 172587 119935 , 00 1, 85 5754, 72 . f °
735, 60 1, 98 184610 120595 , 00 1, 98 6155, 64 Z ~ M O ~ 0 r O M
735, 70 2, 11 196707 121258 , 00 2, 11 6559, 00 20 735, 80 2, 34 208863 121922 , 00 2, 34 6964, 43 ~ a. _ ~ ~ LO
735, 90 2, 43 221093 122588 , 00 2, 43 7372, 18 U aY " o PROP. 36 ~ ~
736, 00 2, 51 233382 123255 , 00 2. 51 7781, 91 ~ ~ ° • CL III RCP z
10 736, 10 2, 60 245737 123906 , 00 2, 60 8193, 8c o: N p a ~ co Q o LL ~ Q
736, 20 2, 68 258165 124559 , 00 2, 68 8608, 16 ~n
736, 30 2, 76 270651 125214 , 00 2, 76 9024, 42 N . • d
736, 40 2, 83 283 09 2 125870 , 00 2, 83 9443, 12 BMP TRASH RACK e ,
736, 50 2, 91 295826 126528 , 00 2, 91 9863, 76 (SEE DETAIL)
736, 60 2, 98 30850 500 1000 1 9 127188 , 00 500 2000 2.98 10286, 58 736, 70 3, 05 321265 127850 , 00 3, 05 10711, 87 ° Q To
736, 80 3, 11 334080 128513 , 00 3, 11 11139, 10 i N
736, 90 Time min 3, 18 346910 129178 , 00 3, 18 11568, 81 Q
737, 00 3, 24 359917 129844. , 00 3, 24 12000, 47 24"W X 24"H X 1 4" SOLID GALV. ~ W ~
737, 10 3, 31 372932 130512 , 00 3, 31 12434, 35 STEEL PLATE FAS NED WITH 0 J ~ ~ O BOLTS AND SEALED WITH SILICONE N
737, 20 3, 37 386022 131183 , 00 3, 37 12870 7~ _ _ 50 YR. WSE= 141.50 STEPS 1.0 SPACING (TYP.)
737, 30 3, 43 399170 131854 , 00 3, 43 13309, 08 10 YR. WSE= 140.29 a ¦
737, 40 3, 49 412394 132528 , 00 3, 49 13749, 93 - 6"x 18"x 1 4" GALV. PLATE Z 2 YR. WSE- 738,69 / ~ Z 4.1
737, 50 3, 55 425678 133203 , 00 3, 55 14192, 77 737, 60 3, 60 439028 133880 , 00 3, 60 14637, 86 TRASH RACK 4 AT EACH JOINT BOLTED 1 YR. WSE= 731, 84 ( J Q U
737, 70 3, 66 452455 134559 , 00 3, 66 15085, 47 TO RISER) ~ N N
1-YR 731, 80 3, 72 465942 135239 , 00 3, 72 155 PROVIDE SLUICE
35, 08 737, 90 3, 77 479505 135921 , 00 3, 77 15987, 23 GATE FOR TOP= 740.29 2.70' EMERGENCY DRAIN " 1' ~m111°011~uuir,
738, 00 3.83 493128 136605 ~ 00 3, 83 16441, 39 EL.=738.69 ~ MIN. ~''''~i,
738, 10 3, 88 506818 137260 , 00 3, 88 16897, 77 200 f PRECAST RISER SEGMENT a~.~` °.°°°°00 4a,,~ WITH FLAT TOP ~ ~a ° °e
738, 20 3, 93 520582 137917 , 00 3, 93 17356, 61 a v ~ WATER TIGHT CONNECTION : ~
738, 30 3, 98 534403 138574 , 00 3, 98 17817, 37 738, 40 4, 03 548298 139234 , 00 4. 03 18280, 60 4x4 JUNCTION 0.6 W x 0.3 H HO > = = " LE 4x4 JUNCTION = Q ~ ~ Wo •
738, 50 4, 08 562251 139895 , 00 4, 08 18745 75 " 5 BOX TYP . ~ g,n ?g ~ „ 1 STORM WSE= 735.31 BMP TRASH RACK BOX ~(TYP) PROP. 36 ;W o o ~
738, 60 4, 13 576270 140558 , 00 4, 13 19213, 11 24 W X 24 H X 1/4 SOLID GALV, (SEE DETAIL) a CL III RCP =,y °~d, o° ~v
2-YR STOf~ui 738, 69 4, 18 588951 141156 , 00 150 4, 18 19635, 85 SEE DETAIL THIS SHEET. " ~ YC~ ~ ( ) 1 DRAWDOWN o " o ~i ~ `C -
738, 70 4, 19 590365 141222 , 00 4, 19 19682 97 N 1 - 3 1 2" DIA. HOLE PRECAST RISER '%,,~N /
738, 80 4, 52 604517 141888 , 00 4 V 52 20155, 04 _ SEGMENTS ~''''rnwn um~n~``° - • ~ . um
738, 90 5, 05 618744 142556 , 00 5, 05 20629, 81
739, 00 5, 69 633030 143225 3 EDW 3 I N 1 YR oo # 5. 69 21106, 64 ~
739, 10 6, 44 6473$c 143895 , 00 6, 44 21585, 19 - 739, 20 7, 26 6 1 QO EDW 3 ~ T ~ ~ ~ ~ INV.- 733.90
61810 144568 # U 1 YR , 00 7, 26 22067. 56 739, 30 8, 15 676297 145241 , 00 8, 15 22551, 35
739, 40 9, 10 690861 145917 , 00 9, 10 23037, 74 n
739, 50 10, 11 705482 146593 , 00 10, 11 23526, 14 • PRECAST RISER SEGM NT
739, 60 11, 16 720172 147272 , 00 11, 16 24016, 84 " E WITH BASE 2.5 CONC. APRON 8
739, 70 12, 25 734939 147952 , 00 12, 25 24510, 16 6" THICK CONC. ENCLOSURE ( )
50 739, 80 13, 38 749764 148633 , 00 13, 38 25005, 48 SHAPE BOTTOM TO POUR IN BASE TO
739, 90 14, 55 764667 149317 , 00 14, 55 25503, 40 740, 00 15, 74 779629 150001 , 00 15, 74 26003, 34 SLOPE INVERT COUNTERACT TO OUTLET BUOYANCY
740, 10 16, 96 794660 150678 , 00 16, 96 26505 56
740, 20 18, 21 809767 151357 , 00 18, 21 27010 38 DETENTION CONTROL STRUCTURE NOTE :ALL JOINTS BETWEEN PRECAST
10-YR STORM 740, 29 19, 35 823411 151969 , 00 19, 35 RISER SEGMENTS SHALL BE
27466, 34 Q 740, 30 19, 51 824933 152037 , 00 19, 51 27517, 22 STANDARD 4 x 4 JUNCTION BOX OR EQUIVALENT MADE WATER TIGHT WITH
740, 40 22, 14 840176 152719 , 00 22, 14 28027, 95 500 1000 1500 (PRIVATELY OWNED AND MAINTAINED) BUTYL RUBBER 0-RING o
2000 740, 50 25, 68 855478 153401 , 00 25, 68 28541, 57 PER NORTH CAROLINA DOT GASKETS. d
740, 60 29, 86 870849 154086 , 00 29, 86 29058, 10 NOT TO SCALE ~ w
740, 70 34, 55 886298 154772 , 00 34, 55 29577, 74 Time min 740, 80 39, 68 901805 155460 , 00 39, 68 30099, 80 0
740, 90 45, 19 917392 156149 , 00 45, 19 30624, 85
741, 00 51, 06 933037 156840 , 00 51, 06 31152, 24
741, 10 57, 25 948752 157524 , 00 57, 25 31682, 24 0 z
741, 20 63, 75 964544 158209 , 00 63, 75 32215, 15
741, 30 70, 52 980395 158896 , 00 70, 52 32750, 29 _
741, 40 77, 55 996325 159584 , 00 77, 55 33288, 32 METAL GRATING (GALV. STEEL) 24"W X 24"H X 1/4" SOLID WELDED TO 1/4" SOLID STEEL PLATE STEEL PLATE BOLTED TO ~
741, 50 84, 82 1012314 160274 , 00 84, 82 33828, 55 741, 60 92, 32 1028372 160965 , 00 92. 32 34371, 32 (3"x1" MAX. OPENING) STRUCTURE WITH SILICONE
741, 70 100, 04 1044509 161658 , 00 100, 04 34916, 95 ~ Q
741, 80 107, 97 1060706 162352 , 00 107 97 35464, 76 U " ° • ~ SILICONE SEALANT 0
741 ~ 90 116, 10 1076982 163048 , 00 116, 10 36015, 42 3" 18 3" ~
742, 00 124, 41 1093317 163745 , 00 124, 41 36568, 25 250 ° ~ 3 1/2" 1" STORM DRAWDOWN HOLE p' Q olo O
'd o . Q ~ N N O
U r k
1' STORM ROUTING SUMMARY Z~ ~ ~o
INFLOW/OUTFLOW HYDRDGRAPH SUMMARY 200 X Q
Peak Inflow = 87, 49 cfs at 715, 00 M I n CO M
Peak Outflow = 1, 64 cfs at 917, 00 Min ° tr f.. \ U ¢wO~ Z Oco~n ~ ~ Q ~~i W o~n~n J ?JNI~ cC ~ CO Lf7 N I~
f~0. Z Q, QZ I I O Q O~ I I W Q~ Q oo ao N N N N
U Peak Elevation = 735,31 ft r ~ ,d. ° ° V w~~n - Z MM • '.d s, ~ ,d. ~ ~ wO~oco ~daDao • ~ ~ o ~ a ~ W ~ M 00 co
Peak Stora = 150 ge 149512 cu, ft . 'f e h d Z t!I^^ 3` NZOO ~ M O O
_ 3 EDW 3 I N 2 r Y 0 w
EDW #3 OUT 2 r 3" 3" 3" 3"
Y 1-YR STORM ROUTING SUMMARY 30"
INFLOW/OUTF 1 QQ LDW HYDRDGRAPH SUMMARY
ELEVATION
P _ eak I of t ow - X44, 34 cfs at 715, 00 M i n O
Peak Dutf low = 3, 74 cfs at 1002, 00 r~ I n O O
50 M F-M
Peak Elevation = 737,84 ft Peak Storage = 471346 cu, f t • » der ~ ~d~' 1/4 SOLID STEEL PLATE .Z a'
.a• ~ ~ 'a ~ °aa ' , BOLTED TO STRUCTURE ~ ~ O o ~3
U U
2-YR STORM ROUTING SUMMARY ~ X Z Y~ x ~ vi ~ Q ~ vi X i
J 00 O CEO
INFLOW/OUTFLOW HYDRDGRAPH SUMMARY 500 1000 1500 2000 SS~~ ~ U' J_OfD ~ ~ O ~ ~ O f0 I~ co tf) co r~ i I
P - eak Inflow - X97, 20 cfs at 715, 00 M I n META RA ~~~ZI I ~~w°I I L G TING (GALV. STEEL) Q v o o,~ ~ Q a, ~ W ~ ~ WELDED TO 1 /4" SOLID STEEL PLATE Q~ Z z ~ ~ I` ~ a~ N N 00 Lo U-) Lo N N
Peak Outflow 4, 18 cfs at 1052.00 M i n °o^^ W o-Y- ce- (3"x1" MAX. OPENING) i5
Time min o¢ go 00 C RISER STRUCTURE FLOTATION CALCULATIONS 1 Q M ti~~ D N mom,, N N
Pea = k Elevation 738.69 ft
Peak Storage = 589468 cu,ft 0 1. WEIGHT OF WATER DISPLACED
6" CONCRETE BASE = Ah
d • / / / _ (6.17 ft)(6.17 ft 0.67 ft = 25.51 ft3 •9 , \ \
10-YR STORM ROUTING SUMMARY
INFLOW/OUTFLOW HYDROGRAPH SUMMARY MANHOLE = Ah J J
= (4.42 ft)(4.42 ft) (6.29 ft)
Peak Inflow = 460,79 cfs at 715.00 rein = 122.88 ft3 LLJ D
Peak Outflow = 19.31 cfs at 797,00 m i n r
WHERE h = 10 YR. ELEV. - BMP INV.
Peak Elevation = 740.29 ft Peak Storage = 822901 cu,ft = 740.29 - 734.00 SECTION = 6.29 ft
NOTES
400-- TOT - W AL VOLUME DISPLACED = 25.51 + 122.88 - 148.39 1, ALTERNATIVE CAGE CONFIGURA .t TIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY c
THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS.
TOTAL WEIGHT OF WATER DISPLACED = (1.3)(148.39 ft3 )(62.4 Ib) = 12,037 lb 2. THIS DETAIL (METAL GRATING AND STEEL PLATE MAY BE APPLIED DIRECTLY AGAINST THE =MJ
1" DRAWDOWN OVER 2 TO 5 DAYS ft3 RISER. ~ r
WHERE 1.3 = FACTOR OF SAFETY 3. FOR LARGER CAGES (HEIGHT > 5) A 3x2' HINGED GATE WITH LOCKING MECHANISM SHALL
OUTLET COMPUTATION BE INSTALLED ON THE FRONT FACE OF THE CAGE. 0 > z J 11. WEIGHT OF CONCRETE
300
DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY ^ VOL CONCRETE BASE = A h LLJ n
412 U = (6.17 ft)(6.17 ft) (0.67 ft) BMP RELEASE HOLE AND TRASH RACK DETAIL z I..
(A) 1- STORAGE REQUIREMENTS = 3 25.51 ft
(a) 206,530 CF (SEE SHEET 5) 3 EDW #3 IN 10Yr N.T.S. Z Z
0 200-- (B) MAXIMUM HEAD (h) AT THE REQUIRED 1 STORAGE FROM LL E DW VOL MANHOLE WALLS = [A (OUTSIDE WALL) - A (INSIDE WALL)] x H
#3 OUT 10Yr THE ELEVATION-STORAGE CURVE FOR THE FACILITY (b) 2.00 FT (736.00 - 734.00 = 4.83 4.83 - 4.0)(4 ) ( .0)] 8.29
= 60.76 ft3
(C) PEAK OUTFLOW RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN VOL, CONCRETE PLACED IN BOTTOM OF MANHOLE
TIME OF 120 HRS [Qp = S/(1.0 x 3600 x 120 VOL. = a h I.. co
100 _ (4.0 ft)(4,0 ft) (2.0 ft ~
0.0000116 x LINE (a) 206,530 - (c) 0.4781 CFS = 32.00 ft-1 C
(D) REQUIRED ORIFICE AREA A A = Q p/(0.6 x 64.4 x h f" TOTAL VOL. CONCRETE = 25.51 + 60.76 + 32.00 = 118.27 ft3 co m
LINE (c) 0.4781 [0.6 x (64.4 x LINE (b) 2.00 °'S] d 0.0702 TOTAL WEIGHT OF CONCRETE = (118.27 ft3) 150 lb) = 17,741 Ibs Z D
ft3 W
0 CONCLUSION : 12,037 lb < 17,741 lb u
(E) DIAMETER OF A CIRCULAR ORIFICE J THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED.
500 000 1500 2000 2.0 x (LINE (d)0.0702_/ 3.1415927)°'S e 0.299 FT c
= 3 1/2" DIA, ORIFICE
Time min W u
2 E ?
File No. NC Tax Map No. Jab No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPOST1
SHEET: D16OF D20

~ ~
~ ~ U
U U
~ = Z
C _M - G 9' -SLOPE ASINI)ICAIED 011 PIAN5 ~ U J oc
CONCRf.I£ pllA£NSIONS o'~ Q Q Y Q
Y PIPE u Q1a = 222.o cis w ~ ~
- 1 _ ~ WN t OOT RI - bR1 - - T 111r ~ UA a A B C E F G w K u v10 = 11.36 FT/SEC ~ Q Q
- _ - - --f - - - - - - - - - - I~'~i I~-~I N 2 I// 19 I/2' t5- 27 I/2.20. 2t-_e' 7 1 2 4' 4_ 6' n ro_ ~ ~ o 9
- - i~ I- ~ z 12 23' le' _ 31~ in= zi_" e' -9' i' i~ e" i7 12.' -_t. t-I"-- I I I I I I I I c coN( c u --•1- - ' PIPE PIPE 30' 24' 3B'- 20" 30• 8' 12• 1- 1' 8• 21 15" 5~
~Ej]'' ~~,,t~,,II I_ _ _ --~-~I - -..I J ] I 1 -37" _ 30' /S'-~ 20" 44' E2 15' 6' 8' 8 11 18' 0~ N ~ N
lLAl1 ~ ON( 1' 41' ]6 52' ]2' 12 IB' 6' 8' ~B" 31' 22" I I I I I~...nnwE1 I I I 7~ ..j ~ ~ - - • / 12 51 /2 59' ]2 48 12 21 6' B B 3/' 26"_ _ . , r
I3• u 5 58 /B 66 ]1 i~ -13 2/ b' B 8' 29'
~ 5 I Y fi5' -S/' 73' ]2' S1" t2 27' 6' B' 8" 3B' e` -L. _ - - - - - - - OPTIONAL COtI51RUCIlON JOINT EOOTOIG _6' 72` 60' 80 36' fib 12 30' B 12 12 16 ]6
!F COtIST _ 1~ 6 r 2" 79 66 87 36' 77 12 3 B' 12 12 it /0` F _ _ _ _ _ f LEY8I1~d t 301 It usrD) / - _ _ _ _ - - - ----------(----------E•--------- -
('~,'n 7' 86' 72' 91' 3b" )B 12' 36' 8' 12' 12' Sfi' /3" T_ND E~ _ _ S
~4hT vlEw ~
_DOWELS IN ENDWALL WITH REINFORCED CONCRETE PIPE l PIPE SINGLE PIPE DOUBLE PIPE REINFORCING G - s ~ ~ _ M M
~ u bui- 'i3 IB' 1/' 70' T6 '7}, -'ill'' i3 Ta '~i In 74' -s~ -Ili ' ~~..8~ C F7AR5 :X.:%: :X: ~:X: :K Y rX •y ~K. ,K ~Y :X~ Y - I ~ ~ r M CZ
~ 'C" BAR 'D' BAR - - 1 S NO ELT NO LGI, E 1 i I U-)
12' . u of r _ _ 2 2 --T -T T .1. 2 7 2 15' 1 _ • / DIY_ 2 2 ! 3 1 i 5 2 2 ) ] 1 / ~5 _ 2' 0 1_II- ( I _ W~
T(li 105 9 9' ~I/ 11 19 55 - 65 ' 1 - - 18' ~ 1 ( - I _ _ _ 2 I 19 19 23 7i- gj 2'-i' / 2•-2' _ 1 ~ Q
~OWEl BAR "X" DOWELS IN ENDWALL WITIi CORRUGATED ~o' i 2'~9 / ? _e METAL PIPE 1. 5Cf Nt)IES ON S1A NO 20 IBO ? 1 1' '~-r'-~_-- 6 ~ ~ ~ ~ , O 20 -66 RCP ~ 0.50 DROP LL
l PIPE 5NIGlt PY'( OOU81 E PIPE ~ - - N{ GARI IR1C Y -43ANS 0 1»~ i5 I }i' fb '7s ib.--• i ii }i' 70 7e' li' le' /2' 1 / i' 2' - I I 0 0.50X = 7320
• - - _ 2 fNNWA1IS >48" RfEFR /8' / /'-9' / 1'~B' I _c un 2 a ~ ~ ~ b ..a. ~ _ ~ ":i i ~ ~ Itl NI:111)I SlAllf)AR(1 ffl7E - / ~ ~ tL
Oh _ _ ? i I 11 2 2 2 1 2 1 SI" ~ S'-3' 1 5',2' ~ I I
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1~._~~ - DIMENSIONS AND QUANTITIES 72' + 6'-9' / 6'-B' 1- ~ / a
_ -~b1~[i8~1• lu N I N _SkICr€-PIPE _ OOU _"~iE~_-•-_r_pUUOR ~U USING [ORAUGATEU•1iE7i1~- ~ - • \ G ~ ~ i N c
_ D ENS_IOr6 SINf.It_PIPE i - D - 11 - B_ C I I CU. YD N -L CU~YO jI "g ~ ~ ' fl) y - u` ~BIC PIPE ~ - - 1S' 1• I,.e. 2.•9.1 )/8 5' 6' 0731 2'•2' 7'-8' 0970 T-U' i~'-_ ~ I:O-Y(} - / ~ d
8' 2'-6' S' 0' O.S1S 1'-LIB' II' 076p 4- AR 12' OC "D" BARS Af 12' ON CErIFER Ib'' i' i' ib' i,_T 6'.i' b45e e'-ii i iii :i' i' i'-a - -'-io o3•i /e ' 2"i) 5 4 1' J B' I' i 011 w I-- "C' DABS Al t 2" ON C£NtER '}i'- i'=}' f'=i' i •b'2 t)? 6'~3' i5bd' ]'=3' n -S Zbib T-4'i'=ii i'-8' i".~ jQP VIEW / 0 J M fER ~ U ~ O
SD' 1'-9 2'-s' 1'-7' 731 , REVISIONS 9'-2' 2115 /-J 13'-S' 2920 1'•J'2' 1' t •S' REVISIONS i U n ~ N o 3 O
8'_10' 1,75) 3''9' 1T•7 ?118 - J6. S'-]' 2'-0' S•..6• 11' 0" ]OU1 5'-0' 16'-0' 1086 1'-9'2'-5' S'. 7' 10'-4' 215b 1'-6- U'. III ?8 NO I>r1TE DESCRIPTION n0 DA7E DESCRIPTION - •-r- -r-. , - - - • - _ 11-8 1.110 5-1018'-6' 553/ S-T2 B 5'-II'11'--10 1.110 i'-3"1T-1' }/)4 - x 2 N
_ 1 5/99 DELETE SP11511 PAD NUIE' ySIDE VIEW !B- 6-5- 3 -l- T_7.. - 11 SS]5 6'-11` ~I_tl ,7_12) S''9'1'_Tt 6'-0` 1!_1_ 1311 6r-0.19':~i~ 31113 ~ a N Q
APPRC?VCO DATC ~ ~ ~ U~ V
CIIAIt1,()TTI, - ~ ~ ~ ~ CONCRETE END hILC.ICLrNI1uRC, WALL FOR ,
I,ANU 1)I?V1;L(11'tt'tl?N'1' SINGLE CIIARLOTTI -114E;CKLENI)i1RG AND DOUBLE PIPE CUL~E
SIANI)AIII}S 11 ~.Q, t~, 1ZEV, I,ANI) nf.,VELOI h4GN C CONCRETE UVINGWALL ti 15 THRU 4I3 PIPE •1 ~GWALL W{TH SPLASH PAD, _ ~ ~ ~ 1111"""""~~TrrrU / ` rrrui
. n.1 rln STAN1)AI~DS O.17A eao°e° ~ ''r~~iq
~ v Mye ~ ~ 'eN
~ a ~ C E
gM ~ o . . U evE ooh -o
~ ~ °e?Wv p ` J..' %yep Ce°~N:
~ ~ °e~ o° ~ ° eee
~ ~ e ~ yrrrrrlryp 111111W1
/ ennunu~~1
50'-0~ SLOPE RIP RAP APRON ° 20 OX SLOPE GROUTED
RIP RAP
GENERAL NOTES:
GENERAL NOTES:
1 ALT. CORNERS TO DE CHAMFERED 1"
THE CONTRl~CTOR WILL BE: REOUIRED TO PLACE 2-#6 BARS "Y" IN THE TOP 1. ALL CORNERS TO DE CI-IaMFEREU t" IF CONCRETE, CONCRETE,
OF A.LL ENUWA(.LS FOR PIPE CULVERTS 42" AND OVER WITH n MINIMUA4 3" - _
2. THE CONTRACTUF WILL DE REQUIRED To F I_ACf_ 2--J Pt_ACf_ 2--~6 f3AflS "Y" IN THC TOP SCALE: 1"=10'
COV#:R APJD A LFNGN{ 0( G" LESS THAN E:NDWAi1. OF ALL EI~JCiWAII FOR PIPE Cl1l.VERTS 42" AND OVE 12'~ AND OVER WI{II A MIfJiMI.1M 3~~
3. FORMS ARE TO DL USCD FOR TEIE CO~!STRUCTIO(J OF TEIE BOTTOM SLAD. Cl)VER AI'JD A LENGTIi QF fi" l[.SS TIanN FNDWAIl.
N FNDWAIl.
4 WALL TFIICKNESS (T) SITOWN IS NOT TO DE INTERPRETED TO - - z 0 I ~ RUCTION OF THE BOTTOM SI_AE3. ~
3. FORra~ ARE TO BL USED TOR TEIE- CONSTRUCTION MEAN T1~IC THIChNCSl ACCEPTABLE, Bl1T !S USED 0111 Y a
ItJ COMPUTING FIJDWALL QUANTITIES. 4 WALL. TIIICI(NESS (T `_;I-IOW(J I; NOl TO BE IIJTERPI _ RIP-RAP APRON DESIGN (PER CHAR/MECK STORMWATER DESIGN MANUAL): 1 BE ItJTERPRE Tf f) TO cn
) 1, MINIMUM TAILWATER CONDITIONS, do = 66° = 5.5' o
5. IF CONTRACTOR ELECTS TO USE CONSTRUCTION JOINT AT BOFI'OM OF PIPE, MEAN THE TI-JICKNESS ACCEPTABLE, DU1 IS USED 0 f IS USED ONLY THEREFORE, 0.5 * do = 2.75'
BAR "X" (DOWELS) SHALL BE PLACED IN T(IE BASE AS SHOWN ON PLANS. IN COMPUTING ENDWALL QUAfJTITIES. 2. SINCE TW = 2.0', USE FIGURE 8-1 FOR MIN. TAILWATER CONDITIONS
SPACING OF BARS TO BE APPROXIMATELY 12" CENTERS UNLESS ENGINEER 3. BY FIGURE 8-1, THE APRON LENGTH, La, AND MEDIAN z
DIRECTS OTt-IERWISE• 5 IF CONTRACTOR ELECTS TO USE CONSTRUCTION J011 RUCTION JOIN( AT DOEfOM Of PIPE, STONE SIZE, d50, ARE 30' AND 1.0', RESPECTIVELY.
AND POURS DASE SEPARATELY, THE TOP OF DASC 6. IF CONTRACTOR ELECTS TO IJSE CONSTRUCTJOtJ JOINT AT DOTTUM OE i'IPE, P OF DASC SHALL Di: lC~( ROUGIt 4. THE DOWNSTREAM APRON WIDTH EQUALS THE APRON LENGTH PLUS
AND POURS BASE SEPARATELY, THE: TOP OE BASE SHALL DE LEFT f20U('I A L C IdCRETE TO BE: 3F~OU P.S.I OMP I THE PIPE DIAMETER: W = d + La = 5.5 + 30 = 35.5' ~
. I. 6. L 0 C RESS VE STf 'RESSIVE STRENGTH. 5. MAXIMUM RIPRAP DIAMETER IS 1.5 TIMES THE MEDIAN STONE SIZE: Q
7. Af_L CUNCRFTC TO BE 3600 F'.S.I COMPRESSIVE STRENGTH. 1.5*d50=1.5*1.0=1.5'
6. RIPRAP DEPTH = 1.5 (dmax) = 1.5 * 1.5 = 2.25' ~
REVISIONS _ _ REVISIONS _ Q M
ru). DATE DfSCRIPTION NO OA[E _ DESCRIPTION O O Q O °
- - - I 8/0(1 REVISCO NOTES N 0
APPRt}VEU DATE f.. w ~ ~ ~ O
~ W ~ O APPROVED DATE ~ w~ x ~ F=0' x X
_ CONCRETE ENDWALL F , r•- CIIARLOTTL 1~4T;CKI,ENI3IJRG Ofd , -~~jZ3 ~ ZZwo ~ Q l.~
CHARLOI`IE - IvILCKLENE~IIRG CONCRETt LAND DrVFLOPhIENT SINGLE AND DOUBLE PIPE CULVERT I' ! , JCRETt WIN w Q ~ GWALL ~ M <A
S - I.ANI) DLVrI~OP11fi:NT STANI)ARI)S 11 n ._..~TwNO U W ¢~~N Z J ZONn ~~~_NU Z aZ I I O Q p~ I I n i
15 THRU 48 PIPE sTANDAItDS WITH SP>u 2o.16B W ~ ~aoooo U ~ NN TH SPLA ~ - SH PAD ~ ~ _M~, ?O.17B ~ ~ woOCn ~ ?~aooo N M 00
Z ~t-r`>M a V o~r~M O
~a~^ ~ Too 1 ~ 5 ~Ww ~ ~ow M
NOj~S: 1 ,
I CEA55 DR MfDIAN SQE DF RIPRAP AND IENGTII. WIDTH AMD DEPTH OF APRON I ~ I I 10 AE DESICWED AY THE ENGINEER. I ,
1 2 RCFER TO 1F$ CHARLOTTE IA(CKl(taAt1RL SiORkA w~tfa DESIGN ualuA( FOR I I
I I RIPRAP APR(IW f1E51GPl STANDARDS I I
T 1 RIPRAP SHO(IEO E%TEND UP ADTH SIDES OF THE APRON AND ARDUND 1HC FHO I I
OF THE PIPE OR CULYERI AT IHE DISCNARCE OUIECI AT A MAXIMUM SIOPE Of I I p o I 2 I AtJD a HEIGHT NO1 LESS TITAN TWO 1IURD5 IIIE PIPE DIAMETER DR ~
CUL4ERI HEIGHT. r ~M ~0 M
1~ THERE SHAL(. 8E ND DvERF(oW FROM THE FND OF 111E APRON TO Th1E ' Q SURFACE OF THE RECEIVING CHANNfI. EHE AREA TO AE PAVED OR RIPRAPPEU ' N ~
SHA(t AE UNDERCUT SO THAT THE INVERT OF THE kPRON SltalL AE al TIIf oZ
SAME GRADE (FL(1SI1) WITI I THE SIIR(ACf OF 111E Rf.CEIVINC CHANNEL IHE ~ ~ ~ ~ a0 C_a,9 APRON SHA(I HAVE A CIIIOFF OR I(lE WAII AE THE U(EWNSIRFAM FND. i = V U ~ _ _ U
x Z Y~ X 5 THE WID1H OF' 111E END OF THE APROtJ SHALL AE fOOA( TO THE BOTTOM 4 ~ ~ Q X Q
WIDNI pF THE RECEIVING CIIANNEE_ MA%IMUM TAPER 10 RCCEIVLNC, CIIAIJNFI. 5'I ~ ~ N J a ~uj ~ ~ H - _ J R ~iIJOO~o ~ c9JOCa O
fi ALE SUAGRADE fUR STRt1CTURE 10 AE COMPACTf D TU 957. OR GREATER U 3 z ~ ~ m Z = oo ~ 0 1 ~ i- ~zorn ~ oo~ol. 'CD LO
i n IE P(ACnTr, or rn( I H R R MPA I IN TI I Ft' IVflJ ~ Q V ~ o f` r ~ J~ 1 . El E 1005E 0 CO CFO E (.fE G ~ ~ O~MM Q NWU~~ 1 00
~ n ~ N N GIArIrIEE SItALE NOT AE ALLOWED 1 . - Zz ~ a I N
a ...~n on.nc no rno.,rc u, na unnnn.rtu ir.,.,r.n nc n,c .nnn., ~ I _ ~ O m m ~ S _ - op m m
. wn•c ni n.c nvnu umnc n[,nnveun vinc. nr n"n I^ w_-.___.._..._...~.1 ' -<CJ cl, 64 C-4 WILL BE PERMITTED. M CV G] 44- N
9 DEPENDING ON SOIL CONDITIONS, WASHED STOIJE OR FILTER FABRIC PLAN WILL BE NECESSARY UNDER RIP RAP
1
10 ANY OISIURRED AREA FROM END OF APRON TO RECEIVING CIIANNEI Mll$1 HE STABILIZED NATURAL GRADE 1 1
1
I
a RIP RAP 11 . ~I I
I'
1
1 1 j
NO ELATE DESCRIPTION NOTE:• - IAYER OF fIL1fR FABRIC I
1 5/99 NOTES 9 & 10 REMOVED WASHER
SIUIIE FROM SECT 8-8 MINIMUM 1;-2/3 PIPE I1IAMEILR . 1
SECTION B-Q APPROVED DATE
CHARLOTTE - MECKLENBURG 1
LAND DEVf;I,OI'MEN'I' ~ RIPRAP APRON AT PIPE SI NO T OUTLET S
STANDARDS ...1 J 1
A
TYPICAL RIPRAP AT OUTFALL PIPES ca LLJ
I
I 1 I
ui >m
I
m
J 0 Z
W
J
J
W
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030010UT XREF: DRAINAGE PLAN STATE/03001BASE
SHEET: D17 OF D20

755
75C
745
740
735
730
725
755
750
745
740
735
730
725
IFIItil
-
IIID '
CROP. RETAINING ALL
(—I
EX. GRADE--,,,,,,,,.
'1EI I K
III=
__— K�=rll 50-YR2-YRWSE
: LI
1111- _ PERMANENT WSE = 732.00 - ' I 11=
11- 731.50 = — III.
Iii = II i_I
FE
PROP. GRADE -1I III=
_T
III —I
�
EXTENDED DETENTION WETLAND #2
SECTION D -D
SCALE: HOR. 1"=20'
VER. 1"=5"
755
750
745
740
735
730
725
MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED:
1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA)
2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP)
3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP)
++++++
4. MICROPOOL (10% OF PERMANENT POOL AREA)
NOTE: EXTENDED DETENTION WETLANDS
TO BE PRIVATELY OWNED AND MAINTAINED
i
i
i
i
i
-
-'I 1=1 I'
I
III I' (-
SCALE: HOR. 1"=50' —i
VER. 1"=5" _-------
111
EX. GRADE
111 =1
--- --
_.. —
_ 7 50 -YR WSE = 738.26 I11=
III
i t.2 -YR WSE = 736.52
... ... ... ... z ... ... ... ... ... ...�_ ... ...PERMANENT WSE 732.00
... ... ... ... ... ...
_ _ _ _ —
1 _ — 731.50I 111 11, ,I 1 1, � I I __ _ I I—I I = _ _ = 111,;,111, ;III_„III►;,III, ►,111,;,111„,III, ,I i l _ _ _ TT I I I 11
-_— 729.00 PROP. = GRADE
=ill --111=
'i_I= III
' I-111-1 I I=111-1 I I-1 I I-111-1 I I=1 I I-1 I I-111=1 ' =1111727.0011 I—
'
EXTENDED DETENTION WETLAND #2
SECTION C -C
SCALE: HOR. 1"=20'
VER. 1"=5”
755
750
745
740
735
730
725
/
LINE '
/
/ ___ \` 1'28
/ \
RIP RAP APRON (FINE STONE) / - _ 7 0
WIDTH AT PIPE = 4.50 ,___ - ' - �� 30 132 --
WIDTH AT END = 10.5'
LENGTH = 9'
DEPTH = 9" 36
1VV
1
- `001 RIP RAP APRON MED. STONE
__ -----------
73 --- -
WIDTH AT PIPE = 10.5'
----- / ---
--- - ---- ----- WIDTH AT END = 31.5'
LENGTH = 28'
_
DEPTH =18
-I-
'=
34 ,
V---- ____ ---- � �� �� _14.
73f/5-0-/ 25
i' ``\\ \\ `,1 i /— —_— 740 — — — — — — — -- \ 737
\ \ \\ ••`\`� •�l \\l�
Vii. WETC2'AND Ot
TO REMAIN � 731 + _
YJNDISTU,PE 1 _ _ 7
Q_
' \' I
/ 7311 , 11
°'o 30
_--6 - -- --
734 -'----_--- -- --_
0
0
736 +72700
-- 738 _ _-'-=_ --
' _ 7 _0 00
N
736
/ X38
_--- �� ------------------- --
/ `,----------------
-'-----------------
240 N
� � � ---- 75 _� - ---- - ---
_ --�'' --G- - cp
156,
- ' r ------ - :
rLAN VILW
SCALE: 1"=20'
File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC XREF: DRAINAGE PLAN STATE/03001BASE
PLANTING PLAN
'Table 7-2 Wedad Mots
Seiaa** Nave
1
Comment
rnmftuoa
WIId1Be Vdw
Notes
Coon Name
Form
A
Talarance
Hight. Waterfowl trod
Many wetland and mveml
Pdtaadra v ftbda
�wm
FArgmt
Yes
up to 1 ft.
High. B aria are .
e� wood ducks
Full dors to partneri shade
SWharft kojolia
Emergetu
yes
up to 1 ft.
Moderate. Tubers and
Aggressive colonizer
Anowhead! Duck
LU zoo �¢cGrn
Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i
w U MM
P0,01
=p
seeds atm by ducks
dlcus such as P. perfoliatum
Asdnopoaat virgbd ws
Perimeter
Yea
up to 3 in.
High. Songbirds and
Tolerant of flucau tg water
Broomsedgc
browsem Winter food
levels do partial strode
and cover
Adm dlowratw
Emergent
Yea
up to 1 R
Moderate.
Requires foil son
7yphe app.
Pmagent
Yea
up to •1 it
LAW. Except as cover
Aggressive. May eliminate
Cattail
F.atergent
yes
up to 3 R
Moderste for food but
other species. volunteer.
tt+eameent.
Cww*hyltum DWOerswa
Submergent
ya
yea
Low food vdue. Good.
Free Hosting SAV. Shade
C000tail
Perimeter
yes
rip to 3 in.
hddnt and sheiter for
towant. Rapid growth.
switchgrata
Sdt and invertebrates
conditions.
SdqWPwgeW
Em "mt
Yes
up to 6 ht.
High. Seeds. cover.
Fan colonizer. Can tolerate
Common Three -Square
Waterfowl, aoosbuxis
periods of dsyneas. Fall
al.
Lm m spp.
Sub= wMl/
Yes
yes
High, Food for
High metal removal
DadmIted
t
I waterfowl, and lisp
High awriertt. copper.
Sarwus Canons
Fmesgeru
yes
up to 1 it.
Low, except for wood
Rapid growth. Shade
Umd's Tail
Submergeat
yea
yes
dtrdcs
tolerant.
Afadl ew aroscheutos
Emergent
yes
up to 3 in.
Low. Nectar.
Full sun. Can tolerate
Efibiwo
fish and invertebrates.
i WM*Fid wrldma
Emergent
Yea
apt* 1 f< -
Moderate. Ducks.
Full am to partial shade
Flokeralweed
Nectar for bwterflies.
Paaonoaeron peednoarr
Strbmersent
yea
nes
Bsuamey hislt.
Removes heavy meds.
Fond weed
waterfowl, marsh and
shorebirds.
baarsla orysoides
Emergent
yea
up to 3 in.
High. Food and cover.
I
Fail sun although tolerant of
Rice CI
shade. PmAdes some
PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER
BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND
AVAILABILITY.
Use of EnF;ijlgln Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization is lining the proposed wetland site. Otho topsoil a4lac wt to the wetlands
may also be suitable. Using *= mstmg soils should hasten thea d mlopment of vegetated.cover
and hydtic e6il conditions. This is also an excellent use of an unporta l natural resource. Many of
the mcromm�awdod planted species cunvltly wast is tlne vicinity of the area to be irtilizcd for this
function. Tile majority of the species in the wetlands ineiude Obligate (OBL) and Facultative Wet
(FACW) vegetation. Herbaceous plant species present inlclude Sofa u (Juncus effusus), sedge
(Caress spp.), Dude potato (Sagdaria latifoliia, Arrow arum (Paltandm mrgmmi Common Three -
Square (Scirpus Pungens), Touch -=e not (impatiens capeusis), Smactweod (Polygonum spp-), and.
others. Supplemental plantings will be selected from Table U.2 in the Storm water Best
Management Practices, NCDENR, April, 1999 based on actual field conditions, if required. Being
that the site is in the vicinity of oar wetlands and floodplain areas it is w0ectod that the area will
benefit fi+orn the natural seed sources available. It is expected that herbaceous and scrub/shrub
wetland species will rapidly volunteer m the area..
Eft Zone Schedule - iW MLgimd
IMUS" NUN Common Name Size Notes
RnsLesl5edges*
Juncus dbmus Smooth Needle Rush 2 yr. peat pot 31 O/C.
Scup. ameaicamts Common Three Square 2 yr. peat pot 31 O/C.
Acoris calamus Sweet Flag 2 yr. peat pot T O/C.
Shallow Wer Plants
Peltandra virginica Arrow Arum 2 yr. peat pot 31 O/C.
Sagitaria latifolia Duck Potato 2 yr. peat pot 31 O/C
Saetnlrus cemns Lizard's Tail 2 yr. peat pot 3/ O/C.
Nupbw luteum Spatterdock 2 yr. peat pot 3/ OIC.
Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species,
quan ities. mind size, which will be utilized for the mitigation sites will be depen dmt on availability.
cost, tune of year m which planting occurs. Control structures such as sedimentation traps,
siltation barriers, and/or at minimum silt fence will be utilized as necessary.
&EMeSIM ft ffgdjMM ggd Cvw Ovy in Wdtmed AffiLa n Sites
Zone 1- W__ ed"d rim in a nuantray ttabtmad am g 2 OU1t ReadEd no krill kMAN&M
Daft TTM Ra
April 1- Jul. 15 Red. Top Grass 7 lbs/acre
Smartweed 20 lbs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 lbs /acne
(to be followed by permanent mentum)
Sept 2 - Nov. 1 Smartweed 20 lbs /arae
Red Top Grass 7 nwacre
Nov. 1- March 31 Temporary Crop 40 ft /acme
Wheat or Winter Rye
(to be followed by permanent mbdum)
The following species may be substituted:
- Bidew connata (BMWs Tick) and other Bideds species
- L«asia oWmides (Rice Cutgcass)
- Panic um virattun (Switd wass)
- PeWmdra virginica (Arrow Arum)
Iastractioas
1) Seed in the dry period
2) use of a filler; such as sand to dilute the seed to ensure uniform ground coverage when
broadcasting
3) tree and shrub planting diould be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
lierbac coos species may with a wetland seed mix which will result in a coverage of at least 100
stents per square meter upon germination. Substitutions may be permitted with approval. Other
native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
grasses shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than
perennials to allow natural succession. If a perennial is required for erosion control than a mixture
small be selected that allows natural volunteering to occur.
0
z
1
1
111
shoreline stabilization
Cwu OPP.
Emergent
yes
up to 3 in.
Hight. Waterfowl trod
Many wetland and mveml
SedAPS
birds.
UPIWA
Schpw vlotaias
Emergcttt
yea
up to 1 R
Moderate. Good cover
Full stat. Asgressive woody
SoA•aaem Buhusb
LU zoo �¢cGrn
Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i
w U MM
P0,01
=p
and food.
dlcus such as P. perfoliatum
Polytmmum spp.
Emtageat
yes
up to 1 IL
High. Waterfowl,
Fast cdonizer. Tolerant of
Sstweed
songbirds. Sada and
tiacotatltts watt levels.
cover.
!wools
Bmageat
yes
up to I ft.
Moderate.
Talawn wet or dry
Sofa
MOWt10”
F.atergent
yes
up to 3 R
Moderste for food but
Feet aoioais i Tolemki of
hish for ower
Auctowas water bvels.
PoLiam vergarum
Perimeter
yes
rip to 3 in.
High. Seeds. cover for
Tolerates wet and dry
switchgrata
waterfowl and
conditions.
Asoma arlmuas
Perimeter
yes
up to 3 in.
taw.
Toler mt of dryperiods. Not
Sweet FIV
a rapid cele tI Tobrates
acidic conditions
8lodea ao1mdenris
Submergent
yes
yea .
Low.
(food water oxygenator.
Waterweed
High awriertt. copper.
ea mgtmae and chromium
removal.
Valisneria mneriaun
Submergeat
yea
yes
High. Food for
Tolerant of murky water trod
wild Celery
waterfowi. Habitat for
high nutrient loads.
fish and invertebrates.
Muria aqumiw
Emergent
yes
up to t ft.
High. Food for birds.
Prefers full sun.
Wild Rice
Table from•. Drxiun of St.�++„w = Wetlands !K«ms: guide_hnes for creating diverse and effective mer wadants in the mid:►ir
Saiarier
PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER
BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND
AVAILABILITY.
Use of EnF;ijlgln Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization is lining the proposed wetland site. Otho topsoil a4lac wt to the wetlands
may also be suitable. Using *= mstmg soils should hasten thea d mlopment of vegetated.cover
and hydtic e6il conditions. This is also an excellent use of an unporta l natural resource. Many of
the mcromm�awdod planted species cunvltly wast is tlne vicinity of the area to be irtilizcd for this
function. Tile majority of the species in the wetlands ineiude Obligate (OBL) and Facultative Wet
(FACW) vegetation. Herbaceous plant species present inlclude Sofa u (Juncus effusus), sedge
(Caress spp.), Dude potato (Sagdaria latifoliia, Arrow arum (Paltandm mrgmmi Common Three -
Square (Scirpus Pungens), Touch -=e not (impatiens capeusis), Smactweod (Polygonum spp-), and.
others. Supplemental plantings will be selected from Table U.2 in the Storm water Best
Management Practices, NCDENR, April, 1999 based on actual field conditions, if required. Being
that the site is in the vicinity of oar wetlands and floodplain areas it is w0ectod that the area will
benefit fi+orn the natural seed sources available. It is expected that herbaceous and scrub/shrub
wetland species will rapidly volunteer m the area..
Eft Zone Schedule - iW MLgimd
IMUS" NUN Common Name Size Notes
RnsLesl5edges*
Juncus dbmus Smooth Needle Rush 2 yr. peat pot 31 O/C.
Scup. ameaicamts Common Three Square 2 yr. peat pot 31 O/C.
Acoris calamus Sweet Flag 2 yr. peat pot T O/C.
Shallow Wer Plants
Peltandra virginica Arrow Arum 2 yr. peat pot 31 O/C.
Sagitaria latifolia Duck Potato 2 yr. peat pot 31 O/C
Saetnlrus cemns Lizard's Tail 2 yr. peat pot 3/ O/C.
Nupbw luteum Spatterdock 2 yr. peat pot 3/ OIC.
Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species,
quan ities. mind size, which will be utilized for the mitigation sites will be depen dmt on availability.
cost, tune of year m which planting occurs. Control structures such as sedimentation traps,
siltation barriers, and/or at minimum silt fence will be utilized as necessary.
&EMeSIM ft ffgdjMM ggd Cvw Ovy in Wdtmed AffiLa n Sites
Zone 1- W__ ed"d rim in a nuantray ttabtmad am g 2 OU1t ReadEd no krill kMAN&M
Daft TTM Ra
April 1- Jul. 15 Red. Top Grass 7 lbs/acre
Smartweed 20 lbs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 lbs /acne
(to be followed by permanent mentum)
Sept 2 - Nov. 1 Smartweed 20 lbs /arae
Red Top Grass 7 nwacre
Nov. 1- March 31 Temporary Crop 40 ft /acme
Wheat or Winter Rye
(to be followed by permanent mbdum)
The following species may be substituted:
- Bidew connata (BMWs Tick) and other Bideds species
- L«asia oWmides (Rice Cutgcass)
- Panic um virattun (Switd wass)
- PeWmdra virginica (Arrow Arum)
Iastractioas
1) Seed in the dry period
2) use of a filler; such as sand to dilute the seed to ensure uniform ground coverage when
broadcasting
3) tree and shrub planting diould be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
lierbac coos species may with a wetland seed mix which will result in a coverage of at least 100
stents per square meter upon germination. Substitutions may be permitted with approval. Other
native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
grasses shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than
perennials to allow natural succession. If a perennial is required for erosion control than a mixture
small be selected that allows natural volunteering to occur.
0
z
1
1
111
11
1
111
co
F-
Q
C%
QM
�
N o
O
U O
U
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W X W t= 4D X
73 zW Z WOo
LU zoo �¢cGrn
Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i
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=p
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a0
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v^^�W - O _,
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((�,1c JOO
3=CIL)Co C C.9JOcD
mLUZ —
SDD�
H �zorn =>oO co r\
Zhf` QI.�NN
a� Q-,-- w W o25
ck� r4
- r--
Q M L4� C14 C-4 C N M C14
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mi (D W
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SHEET:D18 OF D20

780
780
775
I~ I U
/ - U / I I= Tab}e 2.2 wethutd Plants _L U
U - 775 z C Z
770 _I I SelatgRe xese - 1= caatmoa r~elste comotetslyd tneer~tioa t+vuaare vulae t~
/ I PtlentQre Form A Tdeteaee ~ silrgbrlc a Y
- Auow satee Yes up b 1 R Hid Beau ate Fall eue b ' / I I_ P~ ~ / =1 ~jbtie esm wood dads V
/ I AnawLeadr Duck ~ Yes uP b 1 R Mteierne. Tubes oad ye ~ ~
II v 770 Paimeoer seedseetea ~ ~ 13rooewd~ r~ up to 3 is High. Sonrbinds ead Tdenmt of flucanting wue 0
765 ~ ~ browsers. wrote food _s O
~ I k ead eo ~ a ~a1 slide O
~ uP b I !R Requires itdl son ~ ~ i - Bush ~ I Tyra ,
11= caLll~ ~ ap to l ft. Low. tleoept es ooveer ,
-I other Vdtmbe. I 765
7 ~ ~ i 3 ~ - Coomtll "~OCrsG°` ~ r~ Low food wlue. Good.. Froe ~ sAV. I_ ~a shade S
60 ~ ~ ~ ~ / ~ / hebRa end ehelta for tah~att. Repia growdt. a ~ . e~ne~dmvalbb~ 5
i~ / \ ~ \ LII~ sct?Prrp,~ ~ w b ti is sagas, caret, _
/ \ r ~ ~ _ Cotomoo'lhtee,4gaae Pea wbairer. Cm bknte ¦ ~ V I- Wtrlerlowl, Pifiiods of dryads, FuU ~ ~ s ~ s
~ \ ~ ~ EX. GRADE ~ O ? $ o
~ ~ - 76 0 > ~ ~ High, Paod tar fah mtel tamevel 1= sawaas waafow and lbh N N
755 ~ ~ ~ ' ~,s ?'a ap b , !c Low, eseept 6or elpod SMde ~ ~ ti~'dt•
~ III Nfbfuasreoeeheaws t ~ tit. _ Ma:h ~ ~ aP b 1 b,. Lear, Nanr. Pull am. Cat brae o
~ ~ i ~ ~ P~ ~t ~ LL re uP b 1 A Moda>te. Dudts. PWI oat b peaiei shade
p Natierfabtttterflies.
~ ~ = 755 rep I i Pom woad ~ r ingh. Rmtoves heavy ems. LL
750 Weterfavl, marsh gad 11.= ehonbirds.
i ~ - ° ~ np b 3 ro. Hig6. Food end corer. F I Rios aU snit elthoug6 tolerant of Q a
~ i i shade. Provides sooty
i ~ i ? ~ - tL
~ ~ I ~ I I 750 W = Cara app. ~ res a b 3 sabdiaarnt ~ ~ ~
~ ~ / ~ 745 4 ~ P ~ lli3h, wtuafowl end Moor wetieod end eeveel o_ ng~~
~ i i - scr?pstr wuitr yes up b t ft Moderate. Goad coves ~ I Soflaeto Ouhmh ~ Agglepive weedy V N ~i all N `
~i end food. aliens arch Y P. ~ _i ra aP b 1 tt , wetaiow
li Smutsreed 1, Pest abmeer. Tdae+n of seeds atd I atelsr hstreb,
T ,..-----~y..,.. 745 w rro ap b 1 R a L;j
740 50-YR WSE = 741.50 -I Soti Rush Tdeata wst adry i p aaeditioas. ~
llr - . _ 1.1..0=YR WSE = 740,29 -I ~ ~t r'b upb3R Malenteforfoodbet .e,,, I = 3 M Fttstcolooiar.Tolereetof
" I Pmrfcsortve?aatsnt Paimsea n b foroore. 0 _ w,uerlevels. - ra p 3m. I 3 HiSh•seeds,covefor Toleaessvetenddry glnlttttttttta/lye
ICI. II ~ ,,._12-YR WSE = 738.69 f ~ _ I I waafowl end ataditioos. ~~iq q~4
-1 ~ _ 740 od~t Pmimper ~ ~ ee0°ooe ~~~~i yes np b 3 m. T \ ee ~Oe
735 - . ~ ~ -IIi Swat Fhg dtesnt ofd? PI~• Ha aaloaimr.T
" 1 WSE = 735.31 11 "Pd deraa ~ I. ~ a~~tlar<, ~
~I- ~ PERMANENT WSE 734.00 , weterwad Submaraa yes yes Low. water U ;tit co N a . aYB~ _ aW ~ ~o ~ „ 111' % y eti' C o ~ e 7
~ 732.50 . ~ ~ ~ _ nraFmete end chromium Y e ~ o° kl ~p,,
- _ _TiT_i ~ i_i i ~_i i ~=i ~ i_~ ~ 732.50 I' - i=iii=iii=iii..-% - - _ _ _ - - , • I Vdueerto s111triCmle 3 t >rmoval, :doe a°ee ` ~ I 735 W~ ubmet~p ra High. Food fot Tolersat of were end ~4 ~ °0° ~
~ I I ~ i ~ ~ ~_i ~ ~ i_>7 -I I - _ - - -i ~ i_~ i i= - - = 732.50 730 - _730. oo I I. ~ ~ ~J ~ ~ ~ ~ ~ ~ ~ -I - - - - - - ~ _ _ _ _ _ i ~ s - X11- _ _ ~ III' ~ waafowt. Habitat 1~ ~~~~i = for btghttutrieottoeds, ~y~ d~~~
I !.I 11= _ _ _ _ - PROP. GRADE i i i_~ i i_i i i_i i i_i ~ i=i i i_Ti=iii J I 1=1 i I_I I I_I 11=1 I I_I 11=1 I I- I ~ ~ I_ 2koeia 5sh end invembretes, ruaiannntmtsn ~ ycs aP to 1 tt, fflglt. Food 6or birds. Prefers full sua
_I I I_I I I. -1 Wild Rio .I 11= Table 6om• '
, ~ Sd>akr
I- , _ a 0 - - 730
7 1I==- _ ~ ~ _ _ _ _ _ _ - - - I I PLANTING 4NLL BE SELECTED FROM PIANTS LISTED IN
25 TABLE 22 ABOVE (SOURCE STORMWATER I 1=1 I 1=1 I 1=III=1 ? _I I I~Ti-1 ~ I_I i I_I I I~ i ?_i = = _ _ BEST MANAGEMENT PRACTICES NCDE I i_I I I_I i i_I I I-I I I_I ~ NR, APRIL 1999) BASED ON HYDROLOGICAL CONDITI
AVAILABILITY. ONS AND
MINIMUM EXTENDED D
ETENTION WETLAND AR _ EA DEPTH DISTRIBUTI ON REQUIRED; 7 25 Ilse of EYirtin¢ Hvdrtir Se'1
1. SEDIMENT FO REBAY (20~ OF PERM
ANENT POOL AREA SCALE: H - OR. 1 -50 2. HIGH MARSH 35~ Sall from, the wetland axrsirng areas that have permitted for impacts will be stri
( OF PERM y VER, 1 - ANENT POOL AREA 0 5 TO 9 DEEP &asible far ppad and stared as t~lirzatlon >s htung the ptoposod wet>end site. Other ~ topeal adjaaatt to tho wetlands
iiiiiii . y also be sortable. Using these ' ' soils should °~IB hasbe!a the cbvelopmaa of oov~
iiiiiii >>nd h so9 Y~ cxadmons. Tors is also an oxcxllodt use f ' ~ o as natuual resource. Many of
~nnalded planted speaes cunmily exist in the Z vunmdy of die aroa to be uttirzed £Or this ~
3. LOW MARSH 35~ OF ( PERM ANENT POOL AREA 9 0°• T~ ~1~Y is the. ~ spocises wetlands include Obligate (OBI, and F a (~A ) acultattve Wet ~
TO 18 DEEP 1a ~ ~B~on• HabaaornlS lent U p spacres prleseat Include Softrush (Juncos eifusus),
; (Carex Duck w spP.), Potato (Sagitara labfolia, Arrow arurti? o (Poltandra vugmta), Common Three,
Square (St~rpns P~s)~ Tauc~l-mo`nat ftte<ls ~capensts), Sm~artrveed (Poly ,and aux. S l~al sPP
4, MICROPOOL 10~ OF ( PERM itPp plantings will be selelitod fran Table II.2 in the St~aa water Best Managanmt PracArcos, NCDLNR, 1999
ANENT POOL AREA APN, based on actual field conditions if the the site is in the reclwred. Being o
vlemity of otha wetlands and 8oodplaiu areas it is z benefit fi+~n the ~ that the area wlIl natural send sources available. It is that
expeceed h~baceous and scrab/shrub species will rapidly vohuiteer in ~ arcs.
N
a , -i' u
I/I~11 ter" irr' i - - r / ~ g
~ size
! ~ J ~ o M
~ Q ~
~ Juncos Q o N 0 0 N
` _ _ . tRnsus Smooth Noodle Rush 2 31 N c - ~ yr• Peat pot OTC. ~P•us Common ~ ~ ~ Throe Squaro 01C.
Z yr. Peet Pot 3 t- w k Ili Acoris r~lamus Sweet Flag 2 . ~ ~ N o \ yt•peatpar 3 aC. ~ w _o ~ M N N
ii' ~ 1~ ,rte 'rr ~ ~ ~r % , / \ /i / ~ \ ~ . w~ x z Woo x ~ O X
~ ~ / ~llurv W~PLa>31t 7 ~ z w ~ 'Z- ~ w o ~ 1 ~ p ~
~ ~ ~ W~-' o Z a cr, Ili \ ~ I Ptdtaudra V W cw'~~ill Z ZoJSO~n
~ \ _ ~ - ~ Z pr• Poet lwt 3' O/C. Z Q z I I O ~ ~ o N FF=J~Nt^
'1 \ - - ~ - ` ~ ~ hittfoh8 ill ~ ~ Q oo ao V (Oj U N N ~ ~ _ ~ - , 1~ Potato 2 yr. peat pot 3' aC. V w ~ ~ ~ - z -'h rn o ou \ ~ 1 ~ .~3 ~1t1U1VSt;ernnS Llzatd'STail 2 r C w ^.1 Q ~ -1~ ao z U M M JC= 00
~ 1 ~ ~ . ~ ~ N 1 , yr• peatPot 3 OTC. z ~N M M V o~ M N p M M
! . v . ~ ~ _ " ~ ~ IItelTt[t $CdpC){ l ~ ¢ a^, ~ c~ W o 0 1 , ` „ Yt. ~ 1~ 3 ac. g w o r~ Ili w
_ y' . • • ~ . 11 1 _ ~ I ~ I I I 1 I , ' I P shall be in random cl • h l ,III , , I I , I ~???s naturalistic l stn en
. ' ~ I ~ , ~ I I I I I I III ~ I I , I I 'T'rop sou a dtverst 5 I ~ ty, pecrfic plant species, v , . ll , I I I I I I III , I, I quantities, and size, which will be utilized for the
El ~c _ - , . I l , I ~ mi<iigauvn srt~s Rill be ~ ,,L y ~ \ 1 I ,l I ~1 I I I I~ I, I I ~Y•"""""` a~l4Ulltt~~, • ` / ~ ~ ~ -'C\`~\~~ ~ I `r I ( 1 , I 1 III I I I I cost; tune of year 2n which planting occurs. Control Stttletur,es t . ~ ~ , . > 1, ~ , I III I i I , I sihaation b such as sedunerrtation traps,
, ~ . ~ \ ~ ~ r ~ I ~ I , ! I I I III arrler5, and/or at ffiitlllitUln 511t fence will be UtihZed aS .;a ~ , I f ~ ' , ~ , t III I I I I I
[_~`1? ~ _ , ~ 1 1 ~ •a/: } 1 ~ .~I ,l~ /'I I I I I I ~ I I I i I r~' I\ , III I I I I I I I . O O
9~ , P ' / i r / / / l i \ \ ~ L; ~ . ~ ' III III I I I I I 6r CfJi o 0 i~,' . ~ I 'iII i I i ,yy ~ W ~ ~ O O M
~ ` I ~ ~ I t I I I I I i„ ~ ~pMp ~r7 W M M- O
V' , _ - _ 1 , f ~ , V~~ P~ Q - - , ~ 11\ II I,\ ~ ~ jl`~'/.1 I I I I 1 I j I j er N'~ N~ ~ ~ 1 / ~ I LAY I I 1 .2 M
V , / - k ~ \ ~ 1 I \ \ ~ ~ I rr t r 11 1 I I ~ I I I ~ ff^^ ' Q p z , 1 1 r - ~ , ~ l~ I I I I I ~ v/ Q a p'Z Q
\ ~ . If/ - ~ _i !J , / I I I rll I I I , \ "Y'~u l `~W. l~ y}~~ /y~~ ~ U _U y ~ 2 , \ \ ~ r , ~ , / I , ( I I I II i ~ I iVR! Tap Ulp0.~ 7lbs/acre Z ~ W V O . V
, . V , _ 1 IU ~ 1 V 1 t 111 I I i I 1 ~ 5 ~~yl x ~ Y~ Q Y X Q LQ~
I 11 f 1 I I1~ I, I I 20lbs~acre F-!n IQy Q J w \ ~ ,1 ,1 \ ,l r~ ` / I I I I I IIII I . f , i I S , 1 ~ , , 1 I,IrII I I I ~JO~ C JOO J (/j BOO
~ ~ O k 754' ~ r ' k , ~ \ ~ ~ 1 ~ \ ~ ~ r _ Sp-- I I I , I u 11'1• , Jul. i6 • = 00 0 _ O co i / " _ ~ x ; I I I I l' I I I I ; I I l Temporary CrtrP 5 rn tY1 oz = ao ~ C~I co 000
/ ~ / I A / ~ I~.r ~ \ \ ~ ` ~ r r 34,_' I i i III Ar i I I I I I ~ ~ U ~ zo i I ~ ~ "'I p I I _ Q~.,~~„,,, O H ^ t~ Q F.. op o0 r i .----I36 I 1 Q , ~ I I I ~ I ~ \ OrsOrghUm 205/acre 1 t-WO0O Nr; LO U-,3
. y~' ~1¢ ~ ~ i 1 - , k,'' 1F' Y l..`\. 1~:7..1~._t_ ~ . ~ 1`_ , l !>A , / /,Jn % ! ,I / k! ' I ~ , ~ \ ~ ~ \ i ~ , t I I I III 111 i I I J ~ \ , ~a. , I . I I l I I I I I stn ~ fYlltlMVwet ti,., „e......_r. ~_y__, !'r ~ z C9 ^ ^ ~ $ en w N
.a' •y ; z • ' y. • l i .i r ' •c,.X/ ~ ' ~ i ' P ' ~ ' ° y ;~"'r~, -T, y\ \ I Ilri!%^ \ 1' I/ l i V ~ ~i ! .11 k k r \ \ \ ' r.w--- I , I it 11 I I I I O- ~ \ r ' 1\ ~ I i I III I 1 ~ I I ~ I ~ O-lJJ WO~ppvpp~
SCPL \ ` , 1 + I _ _ \ fl ; I I ~~I I ( II I + I 2 - N n' °a ~~eF ? a , - I 742 - ? l l I I I r l l I I I l o Nm
20 l S~~ 1tbs Jacre M li-.?.,, N M N N N 11 ` , - I ' I I I rll I I I I I I I w 1 1 ' \ ` ' I + I l r j l I I I 1 1 Red Top Grw 7 RW Y ~ , I 11 ~ _..744 ~ \ I/ 1 ~r I I I I 1 I I 1 7 WYacre
? i / I ~~fl 111 r l l l NM.
r r / J / /r 1 _ I 1 1 I k , Ala , , ` , , - _ - ? . , I I , , , I 1 l , 1 , 1- March 31 Ten1prely CMP 40 116 /aC[L°
1 ' \ _ 1+ 11 I I What orWW"P e 1~S ~Q'~ ? J ~y \W~ ~ ? \ ' , '1 sir ~ `7481 ~ \ ~ i t Ill ' l I ' I I I / be ft''y,~ y a
0 r l 1 l ~ ~ ~ J / l I .may ' a • o o / k y \ / . 1 1Y` `fir z
k / " ' - _ - - err I I 1 I I _ by pmmamm MW=) / ~t`~ - i~' i 154- 11M fI r I I I o Species my be .
or tj s• , - r k x / / - B1dOW cDnvMa { is Tick) and other Bl&.n r, spemes
I + I I I -140Et8 OZYZM teS (Rice Cutp ) Ui 0 O
WIN A. 742 x k k Al cro
k, k x x J Pelumft virgWca (Arm w ntuil{fir, ` s~ ."?'w ) a
r \ i•-~. \ 'Fag k 000 000 p 'kP - - \ . V",\ I I 1
k 4.0000 _ - 1 ` ,Il/` I' I 1 V
70 010 All, 1 01 0000 ~ ` ~ I - I ~ ? \I j i I A , ' I 1) Seed' th, W V ~ . ~ . I I in the, 1 dry period
r ,.164 - ' " ?'~r 1\ 1 ` i Sand I 2) use of a filler, such as
to to ((!lute the seed t0 eR.4ure \ , I b uniform ground ern+erage when roadcastiAg
' 3) trot and shrub planking should be completed first before seediag OC
\ 1 ' I 4) Pure live seed shall be specified, and approved prior to Planting. O
09 t I > j Z I z
' ~ _ 1 -1 \ \ \ _ 1 it ~ \ \ , ~ 1 \ ~ 1 ~ - 0 1 \ \ ' 1 'i 1 0 q 0 ` `1 I I Iiba000US - 0 4 0 1 , , sp=es my with a 0 Wctland seed miX Wlrch will result in a e of at
MEW. ~ - ~ - - \ ` II \111 + 11 a` / \ I ~ , / i~ /r \/r 0000 0 00 k . 1 . , I any . ~g least 10(1 ~
OWN Ad. Aty 0 0 o p° 0 1 I I I per square meter upon germination. Substitutions may be ~y p0pp0000 1 I natlVe Y Permitted with approval. Other _ 00000 po 1~= LLJ I 1 grasses or annuals may be selecxed. No fescue will be used in
~ ),r< , o 00 0 0 0 grasses shall be wetland areas. Amoral I utilized for stabilization on ~I surrounding slopes within Mitigation Area ra0.ier than ° o + 1( I perennials to allow natural
0 SOO succession. hf a perennial is required for erosion control than a I shall be selected that allows natural v mnchire z
\ \ ` \ I 1 1 ~ \ 1 1 I ~ A Ol nng to occur. + ,1 11 1 I I
~r I PM 4 U 1'1 II 1,111'1,11 M
O
I \ ' ~ I ~ b I ~ 1111+' I / K f,ll~l~jl V
i / 1 'l11 +11 III 1 AV
~ I I ~ ~ I, II 1 I 1, 1 I O
I I I I i i l l l ~ r 1 1 1 1 1 1 1 1 I 11 I OC
l~1D I , 1, I I 1 I I , r 1, I I I 1 i I I 1UU
x- 1 I I I I III I I 1111
/ 1 I I I III 01 / / I I I I I I 1 1 m
\ I 1 1 1 1 1 1 1 I z
I 1 1 1 1 1 1 , , I I 1 1 1 I W W
PLAN VIEW 1 1 1 1 1 ~ r 1 1 1 I I I I I 1 1 I I I 1 1 J
SCALE: 1"=50'
File No. Tax Nap No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC2
XREF: DRAINAGE PLAN STATE/03001BASE V
W W
a
SHEET:D19 OF D20 D20

1. Enter Site Data H ere
"S. „ 2. Assi n Pro'ect Are rte Data and BMPs wor 9 J as Here ~ ksheets require user inputs.
User BMP' re uires user in ut if the site ha
s a BMP not listed on the "BMPs" sheet Assign project area to specific land uses in drainage areas (DA) a ~•:~~i3jN ~ ~ . indicate Hint: Assi ge areas (DA) associated with a s eci ' DEVELOPMENT PERFOR
user input fields, gn land area to the Drainage Areas until all entries in the Model results are summarized ' in the Model Output worksheet. p ftc set of BMPs MANCE ANALYSIS all entries in the "Unassigned" category equal 0.
Walter L. Phillips, Inc. ~ ~
Proptoi;'ed Land. Use/ Co ' ` . ver eta by D y A a rma~ 0 i by DA Northlake Village U U O U
~n • 5~~' ;fie ls~~. r Project Unassi eject Unassigned Craina a Areas DA associat
t " ~ Areas ftz Area Mp' ~ , ~ Pervious Areas ~ ed wlth BMP sets. _ Is ft Area ft2 DA1 DA2 DA3 DA4 DA5 DA6 Land Use S U
`$Cena , . ~ ~ ,r ~ ~ ummary o~
' ' ontea on: ow Cro p :t r ~ t. , ~ ~ ~tlirB Total Site Area (acres Q Y 0 p r , 125.72 Pre-development impervious percentage 1,0°ti Y Q
~ 0 v,.. f 0 p s. Post~evelo me ~ p nt impervious rcenta ° Q <
crest . , 38.0,725 0 el tae . ~ ; , . Wetland ~7 1,725. 0 ~ .,a : . r>> ~ 9e 75.4/0 ~
ulpte~,, ,659 p d,4 Use Scenano N "Meadow • ,659 p 0 Annual H drolo S m
ame when multiple BMP configurations are be n t ' 'Q 0 for a given project. Save each sce 9 sated ,.atq~rn 924 373. o + Y 9Y u mary r
nano as a separate flk. Im loos Areas 0 0 ~ 9`~?6.; ~ . 373. Existing Design Desi n •.•64.077 6 9 Lan a without BMPs with BMps ~
Resldentlal B Li htlndustrial drol ic~~~rcu Annual Surtace Runoff (inchestyr) 2.32 28.84
p$ f~ ~ . t of $i.~e° ~ , _ "o 0 Annuallnfiltration inches r 20'21 0 ( ty) 10.66 2.28 10.90
~ Peirfd tots p i ,v .
us Area 4~•` ~ O 1-year, 24-hour Storm Event Runoff I o u ,a~: Vo , , lume Summary
••:d 7 ~ O I D ~ " , : ` . ~ - Site bated in a zone ottror then Rural or Transitional Zone
Chec 8ldawalk k on Soll Group Sums o a Totals OK G~mnrericlal d Hea I Y Storm Runoff Volume ~ ¦
Industrial ~ 12.0o Storm Event Runoff Volume acre•ft
?~~Rn~QT 980 5 8 x, • ~Parfri '1:bt 495 p - 7~?3 ~ 10.00
2,BAT 187 Other.....- iousArea 187 D Existing Landuse 0.582 X89; M
~ s: e.o0 Desi n without B ~ 0 g Ps 10.006 i° 6.00 ^
;:tip ' x : ~ . ~ ' ~ : ~ 1'7.6,070 0 sld+iMrtaiik 89`7 X70 p , , ~ ~ On-Site St ~
Sto?m Wi , 16 0 ~ Feclllflaes Areas assigned in this table must sum to th • 1 ~ ~ a.oo ors a and Ta et c 16 p a . : ,fig. ; acre•ft LL
e tai development site area. , • nd ' 'Pasture"has livestock, while "Meadow" m 2.00 ' ` 1-year, 24-hour BMP Stora a 14
o All•Other.BM . • , "Drive eaiw unmanaged. herbaceous cover without Ihreetock. ~ and Parking lob include curb and utb . 0 ~ 0' rr D.00 ~ .21 ' 'j: Tar get Storage 9.424 LL $8 0 LL
Total Area 9 r "Rooftops" include canopies. 5' 6,363 D Existing Design Meets Goal? Yes 363 D 582626
Proposed Drains a Area D g (A) assignments match Pro c 499,198 2,607,842 1,786,397 Q
p match Proposed Land Use. Annual Pollutant Load Summa Y '
• 3. Assi n BMPs Her ry p ~ N Existing Design Desi n ~ Z Q N
9 e nd tlSelaoya~; ' ck on a box to associate a BMP with a s 9 W ~ Land~e without gMps with BMPs ^
a' pacific DA. BMPs sl - b. Enter store a volum ' is DA. BMPs should serve the entire DA Sediment (tonlyr) g ~ ^ ~ 97.94 7.05 p co
: ~ • .Exrlstiri. d Use 9 e (if applicable) of BMP inacre-ft, arao` ,sad Land -Use icre-ft, Total Phosphorus (Iblyr} 8.4 Z N ~ 157.6 39.7 O Total Nitrogen (Iblyr) 91 ~ o
4 p ~ ~~~G of Situ ' , ervrous Areas !K• .lairs • e 3480 1517 Fecal Coliform (count x 10 lyr) 631 a x
BMPs lied to DA s r ° ,~~q yr. 5575 1220 <
~ ~ p~/ °~i '~Olld Al DA2 DA3 DA4 r- _ J v v ~ v . ~ Sediment Load Phosphorus Load I vii J
i•Orel~t ~ ~ ~ ~I.~:Ii D ; oete0 M, ~ $6.8K ,:s son.. • ~ ` Nitrogen Load Fecal Coliform V N
w ° 1:26 . .M , ' ~ { r 120.00 Load . ~ ~ " ~ ~ «S I 1 B0.0 4000 6000
>4~§'~,r y '3° ~ ' t ~ 100.00 ~ 180.0 3500 ! ~ 140.0 ~ ~ ~ 5000 auuuNgr
n 0:1)% .hrQanden - Im rvlou:Anse ~~,,r , , "f8,ls' t v ~ ~ . - ' 80.00 ~ ~ 3000 I Ngiri v - I 120.0 , ~ . ~ ~ ~ ~ i 2500 i 4000 ,,,q
ResldenGal d Enhanoe<i~~iraesSwaie ht Indus a~w ; x teal . 60.00 ~ 100.0 ~ : poi 44__
. , ~ + ~ 0 ti' Mil r C ~ 80.0 I 2000 3000 v o0 40.00 ~ 1500 ~ M eY
~ .,p ,.,r , , , , , . , • 60.0 ~ ~ 2000 ~ ° J o N = i . _ 40.0 1000 ` Q p ^ r n Ile. ~o
; , i ~ aendefllNsld i3MP uentfal etith: ` seal ned BMPs ~:r a •r, a ~ ~ a o - i IPs r 20.00 I ~ o U y ~ a e 20.0 1000 ed N o 00"3 ~o
~Btoad , ct?5L Ford Bldfsr . .;Sideyvaik - . ~ ;r fl.fl'k:...= -Enter Buffer WidthforeachDAvvithfore ' ~ 0.00 500 Z ° o°
.,4 - er (feel v , Commerlcial & Hea Industrial •a0!~ • ;ted=Staffer //feet ; ' ` y / 0 0 'rd~` 00
ercent of r~ - '•7 ' ' , 7; ~ y Ss SN ~ „ ~ , Da~Ytithin:treat „ . a.~ , . • entzorn 3 3r Storngif Volume for 1 2 r etreatment zone p~ ~r . , ~ ~ ,yV r 55.~9G Develo ed Area Sed' '''err
,t; ~ Y, ~ ul tt.0% a ~ ~ ° n; 4h atorm,~acre-ft), ' • , , ~ r~r ~ ~ ~ . '17:5 • ' :Q;d~ - Notes: brass channels do not receive rem P tment Target Summa Ur a~ rY rueunounem
~!ioUS /~t'98 1 ~ :d - • , r ~ +~8.$°h'' oval credit when used in combmahon with water ~ T ~ ~ ?0,0le ~ Forested Buffers cannot be used with Wet Ponds D mbinahon with water quad d ewales. ~ Cord ~ b ry pa tson to Target Sediment
i~yo" ry DetenBon Basins, or Stornw _ ~ ~n Basins, or Storrnwafsrwe~tlrds the same d 120.00 Loading and Target (tonlyr} ~ ra'"ape a
Sfdewalk Stone WaterMa '1~ 100.00 I ° ~ Design without BMPs 97.32
na ems `OQ'~ Kk nt Facpltles °"~'r - 'PnndlWstiahdh~- Y ~ 80.00 Design with BMPs 6.66
+Atl~ther BMPs exce' t~f ~ - ~ B'Y° ` j Tar etLoadin
fifer ~ ~ ~ , 0.0~~ • ' ~ ~OrB°lo' 60.00 ~ g 9 14,80 Meets Goal? Yes
~~'otai r ~ s , ~ 476~3s BMP P s;; ~.~oo,~~ • r=~•~fia ~ ~ . ertormance • r.. , ~ b~ 40.00
~'otal Site 1m - : CoveE ~ ~ ' ~ ; 20.00 Additional sediment from
,irii . ; loos ,f ~a A~ Cotrer••wlttlin~!eireloped Area... ~ Net Reductions 0 ~ undeveloped areas removed
p . C ,``~4j4% - ervrous areas are assumed to be 1% impervious 1=1oVict~Ornerted to inflttration b B z „De MPs - . . DA1 DA2 No B j by BMPs (for reference only); p,23 DA3 DA4 MPs with BMPs Target
veloped Area" refers to that portion of the ro'ect Totehatitro p 1 not covered by Row Crops, Pasture, Forest, or Meadow x 33 ~O 5.5%
TvMi PJwa onus. 71.~1fi ; 71.~V,, 19.96
Check on New Land TE& ~ . . se Cover 38~1K ~ 'A ~ 6$:276 23;Y'6 BMPs Meet Sediment Load Red ' action and Runoff Control Targets
Existin L g and Use Data OK i'er~l''~oliform ' ~ - ~8+1~. ,-X5.0°la 98.1X 87.1
"Target addresses loadin from Bevel Z '9T•0°ti 70.0% 97.0% 9 oPed portion of site. 2.8%0 Developed portion is lawn, BMP area, and impervious area, o Undeveloped portion is forest, meadow, wetland, pasture, and row I
sop and uses. a
#y: . r "~ed~ U
Proposed Land Use Data ~!ll.ut-;, ~K W O
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DRAINAGE AREA MAP FOR SITE EVALUAl
File No. Tax Map No. Job No. _
03-001 Cadd Dwg, Flle; DRAINAGE/03001SET SCALE: 1"=200 XREF: DRAINAGE PLAN STATE 03001BASE
W
SHEETT20 OF D20 0

1
DWQ Project No. 021204
DWQ Project No. 021204 DWQ Project No. 021204
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET BIORETENTION AND NATURAL FLOODPLAIN AREA OPERATION AND MAINTENANCE AGREEMENT ~ ~
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTIQN AREA WORKSHEET FOR NORTHLAKE VILLAGE F' 0
I. PROJECT INFORMATION (please complete the }ollowing informatan): U U
Project Name : NORTHLAKE VILLAGE I. PROJECT INFORMATION (please complete the following information): U I. PROJECT INFORMATION (please complete the following information): = Z
Contact Person: JILL OLINGER Project Name : NORTHLAKE VILLAGE Phone Number { 703) 532-6163 Contaci Person: JILL OLINGER For projects with multiple basins, specfy which basin this worksheet applies to: Phone Number. (7031532-6163 Project Name NORTHLAKE VILLAGE Maintenance activities shall be performed as follows: - U
For projects with muftipte basins, specify which basin this worksheet applies to: Contact Person: JILL OUN(~R Phone Number 703 532-6163 ~ 1 Immediately after completion of Bioretention Area planting• Q a
Permanent Pool Elevation 747.80 ft. (elevation of the orifice irwert out) For projects with multiple basins, specify which basin this worksheet applies to. W a
Permanent Pool Elevation 770.10 ft (elevation of the orifice irnert out} Temporary Pool Elevation 14$.50 `i (elevation of the outlet structure invert in' a. Plant material shall be watered at the end of each da for fourteen consecutive da s. ~ Permanent Pool Eievatror VARIES ft. (elevation of the orifice ~rnert out Y y ~ Q ~
1 Temporary Pool Elevation 770.30 ft. (elevation of the outlet structure invert in) ~ U o Temporary Pool Elevation VARIES ft. {elevation of the pullet structure invert in} 2 When ever needed; ~ 0
Bioretention Surface Area 2,536 sq. ft. Bioretention Surface Area 2,148 sq. ft. D ~
Drainage Area 1.37 ac. {on-site and off-site drain a to the basin Z O Bioretention Surface Area 3,842 sq. ft. a Remulch any void areas. N
Impervious Area ~ ) Drainage Area 1.16 ac. (on-site and off-site drama a io the basin 1.11 ac (on•site and off•site drains a to the basin g ) Rational C Coefficient g ) Impevous Area 0.99 ac. (on•site and off-site drama a to the basin Draina a Area N 9 1.96 ac. (on-site and off-site drainage to the basin}
0.85 Rational C C ~ g ) Size % 5 % ° oefficient 0.85 Impervious Area 1.67 ac. (on-site and off-site drainage to the basin) b. Treat all diseased trees and shrubs, ~ fA ~ Q o Rational C Coefficient Q85 Z ~ M O
(erther 5% rn wlsand under drain or 1 k in w1o) Size 5 ° ~ ° (either 5 h m wlsand under drarn or 7 h m w1o) W N Size % 5 (either 5~ in wlsand under drain or l°k in wfo} c Replace any deficient stakes or wires Z ~ ~ N
InleiVelocity 1.9 fPs SE Z ~ ~
Inlet flow d th E DETAILED INLET VELOCITY Inlet Velocity 2.3 fps SEE DETAILED INLET VELOCITY eP 0.97 in CALCULATION Inlet flow Inlet Velocity 0.8 fps SEE DETAILED INLET VELOCITY 3. One year after completion of Bioretention area planting: 5 0 M O
Depth to Ground Water 17,3 S, THIS SHEET, depth 1.04 in CALCULATIONS, THIS SHEET. ft. Depth io Ground Water 8.30 Planting Soil Infiltration Rate 1.5 in.mr. (the soil layer down to 4 feet ft. 4. o nlet ow depth 0.34 in CALCULATIONS, THIS SHEET. O M
f~lanting Soil Infiltration Rate 1.5 in,(hr. the sal la er down to 4 feet De th to Ground Wat r m = p e 7.90 ft. a. Re ove stakes and wires during the spring. ~ ~ U ~~s t`
In-Situ Soil Infiltration Rale 1.00 in.lhr ( y ) (the soil layer below 4 feet or below the sand bed) to-Situ Soil Infiltration Rate 1.02 in.lhr. (the soil layer below 4 feet or below the sand bed) Planting Soil infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet) ~ n. O ~ ~ o M
I Situ Sad InfdVation Rate 1.00 in.lhr. (the soil layer below 4 feet or below the sand bed) = r ~ 4, After every srgnrfrcant runoff produong rainfall event and at least monthly. U
II. REQUIRED ITEMS CHECKLIST II. REQUIRED ITEMS CHECKLIST ~ ~ cW0
initial in the space provided to indicate the following design requirements have been met and su ortin documentation is attached. 1f 1!. REQUIRED ITEMS CHECKLIST a. Ins ct the Bror tendon and Natural Flo lain Ar r invent accumulation er sr n ~ N pe a odp easfo sea o o , ~ J M ~
Pp 9 a Initial m the space provided to ind~cafe the follovng design requirements have been met ands rtin documentation is attached. f requirement has not been met, attach an explanation of why. At a minimum, a complete sformwafer mono emenf Ian submittal includes r ~ g 1 a trash accumulation, vegetated cover, overall general condition and repair as necessary. O o ached. !f a Initial in the space provided to md~cate the following design requirements have been met and supportin documentation is attached. !f a Z u- D
a worksheet for each BMP, dent n calculations tans ands g p equrrement has not been met, attach an explanation of why. At a minimum, a complete stormwater mans emenf tan submittal includes 9 , p pecrf~ations sho?nng all BMPs and outet structure details, a detailed a worksheet for each BMP, desr n calculations tans and g p ~ Q ~ g 5 Eve three months: al includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes ry
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal arks a will resul in g , P specrfrcatans showing all BMPs and outlet structure details, a detailed p 9 t a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal cka a will result in a r uesi f r W a detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet swciure details, a detailed O
additional information and will substantially delay final review and approval of the project. ~ g ~ o additional information and will substantially delay final review and approval of the project. equesi for drainage plan and a fully executed operation and maintenance agreement. An inc a. Inspect and repair the collectionfdischarge systems (i,e, inlets, outfalls, pipes, nprap, etc.) ~ Z U' omplete submittal package vnll result in a request for ~
licanfs Initials additional information and will substantially delay final review and approval of the project. to maintain proper functioning. c~
0 No vertical sand bed is r sed licanfs Initials W Q t0 licants Initials 6. Eve six months, Z
p ~o No vertical sand bed is r sed 0 The bioretention area is at least 40 feet by 15 fee± p °p° 0 The bioretention area is at least 40 feet by 15 feet, ry Y r No vertical sand bed is proposed 0 ~ N
0 Sheet flow is provided at inlet. 0 Water fabled this rester than 6 feet, 0 Sheet flow is provided at inlet. 0 The bioretenton area is at least 40 feet by 15 feet. a. Remove accumulated sediment and debris from the Plun a Pool and repair andlor replant ~ Z Q g ~ W ~
~ g D Water tabled this rester than 6 feet. Minimum of 6' ponding is provided. ~ g D Sheet flow is provided at inlet, any down gradient erosion, 0 c~
Minimum of 6 ponding is provided. The ponded area will draw down in less Phan 4 days. 0 Water table depth is greater than 6 feet. U ^ O O Mirnmum of 6" ponding is provided. b Remove and replace all dead and diseased vegetation considered beyond treatment in the ? U N
The ponded area will draw down in less Than 4 days. Planting soil infiliraton race is greater than 0.52 inlhr. The ponded area will draw down in less than 4 days. Bioretention areas Plants are to be replaced only from March 15 to Apri13D and from
Planting soil infiitraUon rate is greater Than 0.52 iNhr. ~0 The in-situ soil infilUation rate is greater than 0.2 iNhr. . 0 The in•sifu soil infiltration rate is greaser than 0.2 iNhr. Planting soil infiltration rate is greater Shan 0.52 iNhr. October 1 to November 3D. Z Q
A planting plan with species and densities is provided. A planting fan with species and densities is provided. . d The in•situ sail infiltration rate is greater than 0.2 iNhr w Z L; j
Mulch layer is specified in plans. Mulch layer is specified in plans. .l D Planting soil meets minimum soil spec cations (NCDENR Stormwater Best Mana emenf A planting plan with species and densities is provided. 7. Once a year. J Q U
9 .JD Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana emenf Practices Manual, April 1999) 9 ulch layer is specified in plans. D Planting soil meets minimum soil specifications (NCDENR Stormwater Besi Management a During the spring months, add mulch as necessary. l/7
Practices Manual, April 1999) J~ Plan details for the bioretention area provided. Practices Manual, April 1999)
JQ Plan details for the bioretention area provided. Plan details for the inlet and outlet are provided. JQ Plan details for the bioretenton area provided. 8. Every two or three years. puuunuuwgy
Plan details for the inlet and outlet are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. Rn operation and maintenance agreement signed and notarized by the responsible party is provided. Plan details for the inlet and outlet are provided. 0°0
Please nose that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains An operation and maintenance a reement si ned and notari a. Remove old mulch layer before applying new mulch layer. ~P °po 9 9 zed by the responsible party rs provided. ~tp vo°
Please note that underdrains beneath the planting soil are acceptable in the Piedrant and Mountains 0° 4 °°~N Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains h
~ °0 ~ t ~a -Q° ~ W° -
cU° oDt~1 Z°7°- lacknowledge and agree by my signature below that I am responsible for the performance of the seven eW N ~ g ~
maintenance procedures listt~d above, I agree to notlty DWQ of any problems with the system or prior to any S °3 °o°(~
DWQ Project No. 021204 chan es to the s stem or responsible art . ~r °e~ °o 9 Y P Y , cy °o
OWO Project No. 021204 D212D4 Print Dennis Hecht a ent for and on behalf of TRG-Charlotte TLC i~~~~9 , DWQ Proiecl No. name: _ 9 ,,,~~~rr~ r[`„~~~~~
DIVISION OF WATER QUALITY • 610RETENTION AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET anneal Title' Ruthotized Signatory, Vice President, Legal Services & Partnership
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET A dm i n i s t r a t i o n
I. PROJECT INFORMATION (please cor~lete the following information) Address:__.~_20o E._ Lon~Lake Road, Suite 300 Bloomfield H' ] s M:[ 48304 k-' a
Project Name . NORTHLAKE 41LLAGE i. PRO,~CTlNFORMATION (please complete the following irtfortnation): Project Name : NORTHLAKE VILLAGE Contact Person: Jlll. OUNGER Phone Numbee 703 532-6163 248.258-68 0 ° I. PROJECT INFORMATION (please complete the following information}: Phone:
Contact Person: JILL OLINGER Phone Number. 703 532-6163 For projects with multiple basins, specfly which basin this worksheet allies la I Protect Name : NORTHLAKE VILLAGE 5r natur : ~ ~ ~ ~
For projects with multiple basins, specfy which basin this worksheet applies to: Contact Person: JILL OLINGER Ph g one Number. 17031532-6163 Date. For projects with multiple posies, specify which basin this worksheet applies to: ~
Permanent Pool Elevation 762.60 ft. (elevation of the orfice invert out
Tem ra Pool Elev n ) Permanent Pool Elevation 762.10 ft. elevation of the orfce irn po ry a6o 762.80 ff. (elevation of the outlet structure invert in ( ert out) Temporary Pool Elevation 76230 ft. elevation of the outlet structure Inv 'n Permanent Pool Elevation 759.60 ft. {elevation of the orifice irnert out} Note: The legally responsib?e party should not be a homeowners association unless more than 50% of the
( ert i ) Temporary Pool Elevation 759.80 ft. {elevation of the outlet structure invert in) lots have been sold and a resident of the subdivision has been named the president.
Bioretention Surface Area 1,574 sq, ft, Bioretention Surface Area 833 sq. ft.
Drainage Area 0.85 ac. (on•site and off•site drainage to the basin Im rvious Area ) Drainage Area 045 ac. (on-site and of(-site drains a to the basin Bioretention Surface Area 1541 , ft, 1, 0.c en ~ t'eh c , a Nota Public for the State of ~ti o, , . sq ry
Pe 0.12 ac. (on•site and off•site drainage to the basin) Im two g ) Rational C Coefficient 0.85 pe us Area 0.38 ac. (on-site and off-site drainage to the basin) Drainage Area 0.73 ac. (on-site and off•site drainage to the basin) Count of 1 s TACO {nn~ d0 hereb certif that ~ e c 1. Y - Y Y e. n. S~' . Impervious Area 0,62 ac. (on•site and off•site drainage to the basin)
Size % 5 ° . Rational C Coefficient 0.85 (either 5 ~ m wlsand under drain or 796 in w1o) Size % 5 % o ° Rational C Coefficient 0.85 personally appeared before me this ag day of u u , a0o3 ,and acknowledge the due
(either 5 /o m wlsand under drain or 7 b in wb) Size 5 °k {either 5°~ in wlsand under drain or 7°k in wlo} execution of the for pin wet wetland detention basin maintenance r uirements. Witness m hand and
Inlet velocity 1.8 fps SEE DETAILED INLET VELOCITY 9 9 [ ) eQ y
Inlet flow depth 1.20 in CALCULAl10NS, THIS SHEET. Inlet Velocity 20 fps SEE DETAILED INLET VELOCITY Inlet flow depth 0.90 in CALCULAl10NS, THIS SHEET. Inlet Velocity 2.0 f s official seal, o P SEE DETAILED INLET VELOCITY F
Depth to Ground Wafer 12.10 ft. Planting Soil Infiltration Rate 1.5 in.lhr. the 'I Depth to Ground Water 8.50 ff. Inlef flow depth 0.79 in o_
( sot layer down to 4 feet) Planting Soil InfilUation Rate 1.5 in. Jhr. (the sod layer down to 4 feet) In-Situ Soil Infiilfra6on Rafe 1.50 ~ in.mc (the soil layer below 4 feet or below the sand bed Depth to Groundwater g,10 ft CALCULATIONS, THIS SHEET. W lanting Soil Infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet} o
In-Situ Soil InfilUation Raie 1.05 in.lhc (the soil la er below 4 feet or below the son Y d bed) In-Situ Soil Infiltration Rafe 0.95 in.mr. (the soil layer below 4 feet or below the sand bedj
II. REQUIRED ITEMS CHECKLIST I!. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have Been met and supportin documentation is attached. ff a II. REQUIRED ITEMS CHECKLIST o z
9 Irn6al in the space provided to indicate the following design requirements have been met and su rtin documentation is attar requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater man emenf Ian submittal includes ppo 9 tied. 1f a red. if a Initial in the space provided to indicate the followin desi n r uirements have been me
a worksheet for each BMP, deli n calculations tans ands ~ ~ p requirement has not been met, attach an axpiana6on of why. At a minimum, a complete stormwater mans emenf Ian submittal incl 9 , p pecificatrons showing all BMPs and outlet structure details, a detailed a vrorksheet for each BMP, lest n calculations tans g p udes 9 9 e9 f and supporting documentation rs attached. lfa includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal cka a wilt result i g . P and specrficatons showing all BMPs and outlet structure details, a detailed Pa 9 n a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submttal cka a will result in a r detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet sinicture details, a detailed N
additional information and will substantially delay final review and approval of the project. a i Pa 9 equest for ddif onal information and ~wll substantially delay final review and approval of the project guest for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal parka a will result in a r uest for SEAL 9 eq Q
licanfs Initials additional information and will substantially delay final review and approval of the project, wty commission expires
0 No vertical sand bed is r sed licanfs Irdtials p opo No vertical sand bed is r sed U licants Initials KAAEN a O
0 The bioretention area is at Ieas140 feet by 15 feet, p °po 0 The bioretention area is at least 40 feet by 15 feet. 0 Sheet flow is provided at inlet. No vertical sand bed rs proposed pp~p~ ~
0 Water table de th is rester than 6 feet. 0 Sheet flow is provided at inlet. .IO The bioretenton area is at least 40 feet by 15 feel. klMq M Oddend Co., M Q M
p g D Water table d this realer than 6 feel. Minimum of 6" ponding is provided. ~ g M~ t~nattrwon ~ t?12Trl001 Q o ° D Sheet flow is provided at inlet. o N ~ 0 Water cable depth is greater than 6 feet. o
The ponded area will draw down in less than 4 da s. Minimum of 6 ponding is provided. Y The ponded area will draw down m less than 4 da s. V ~ ~ Minimum of 6" ponding is provided. Z ~ ~
Planting soil infiltration rate is greater than 0.52 inlhr. Y Planting soil infiltration rate is greaser than 0.52 iNhr. U ~ N~ The ponded area will draw down rn less than 4 days. W .o
. /D The in-situ soil infilVation rate is greater than 0.2 iNhr. . 0 The in-situ soil infiltration rate is greater than 0.2 inlhr. ~W~ X ~ ~0, X Planting soil inflltra6on rate is greater than 0.52 rnlrr. e Z W a x
A planting plan with species and densities is provided. A planting plan vnth species and densities is provided. Mulch layer is specified in plans. 7~ZW ~ Z~woo The in•situ sail infiltration rate is greater than 0.2 iNhr. Z ~ ~ ~ a a
Mulch layer is specified in plans. JO Planting soil meets minimum soil specifications (NCDENR Stomiwater Best Mana ment A planting plan with species and densities is rovided. W ~ ~ n ~ tO p U aWOO~ Z Zo o~ Mulch layer is specified in plans. Z a Q Z vi ~ O Q o o N
9e JD Planting soil meets minimum soil specifications (NCDENR Stortnwater 8esf Mana emenf Practices Manual, April 1999) g W U w~¢~a^o fA U vvMrNi D Wanting sal meets minimum soil specificatons (NCDENR Stonnwater Best Management - Z I
Practices Manual, April 1999) JO Plan details for the bioretention area provided. JQ Plan details for the bioretention area provided. Practices Manual, rig 1999 N ° `O `O Z ~ ~ ~ 00 AP } G ~ F- rM Q U ~ N.~ h
Plan details for the inlet and outlet are provided. Plan details for the inlet and outlet are provided. Plan details for the bioretenton area provided Q ~ ~ ~ ~ M ~Q~~ 3 °woo
An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. J W w N ~ ~.~i Plan details for the inlet and outlet are provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains pl _ Ar operation and maintenance agreement signed and notarized by the responsible parry is provided,
ease note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains PieaS° note te'a`.:"~~a"'li;~ "~c ~:~'I"ce•` ,~'k j}~^r;^r^y SGy: 2fe 3CCP~ii2DiE IG p~Q h^,6gTFJr~, Zri~ tJIUJfru'1R~S
O ~
DWQ Project No. 021204 DWQ Project No. 021204 O O~ M
BIO RETENTION INLET VELOCITY CALCULA ~ o TIONS ~ _ _ _ Q
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET DIVI510N OF WATER QUALITY • BIORETENTION AREA WORKSHEET
PLANTED STRIP VELOCITY REDUCTION .Q ~ Q oc?
I. PROJECT INFORMATION (please corr~iete the followirxJ information): Project Name : NORTHLAKE VILLAGE I. PROJECT INFORMATION (please conplete the following information): x
Contact Person: JILL OLJNGER Project Name : NORIHLAKE VILLAGE BIO AREA #1 BIO ~ ~ X W ~ x AREA #2 _ 'BIO AREA #3 BIO AREA #4 y r;;~~ a Z a a - r + - * + r a,' ~ ~ N L~ Q J rj Lam.
Phone Number: 1 703 1 532-6163 Contact Person: JILL OLINGER For projects with multiple basins, specify which basin Phis worksheet applies to: Phone Number 17031532-6163 Q-c f A Q-c I A Q=c I A Q=c`I'A ~ _ ~ o ~ ~ o 0 0 to
for projects wish multiple basins, spec which basin this worksheet a li tlY pp es to. _ 6 Q=0.85"' .03 inlhr * 1.37,4 = - + * _ `~°'d ~ U ~ _ °o ~ Z J o (7 ) { c) 8.18 cfs Q 0.85 {7,03 rn/hr} (0.85Ac) 5.08 .,fs Q-0.85 {7.03 rn/hr} (1.06Ac)-6.33 cfs Q=0.85 .03 rn/hr' 1.16Ac -6. r., FA t, OC ~ V avement -4.2 s - _ Z ~ ~ r` I
Permanent Pool Elevation 767.50 ft. (elevation of the onhce ~rncri out} Permanent Pool Elevation 761.60 ft, (P ) ip V(pavement -4.2 s V avemen - - ) ~ (p t) 5.9 fps V{pavement}-5.0 fps ~ Q ~ ~ M M Q 7Q~ N w - - 2O ~ Z~f~f~ ~ `y' WNN V{grass strip)-2.4 fps Vfarass stria)=2.3 fns 1/(nracc ctrinle~ 7 fi,e vr,,..,~„ a lJ~/A~. S r! s LO N
Temnnrarv Pnnl Flavafinn 7FA M a r_~_.._. . _ feleVahOm Of the bra irnrarf m rtt
- - tC nvauon ur me ouuet structure invert in) Temporary Pool Elevation 161.80 ft. (elevation of the outlet structure invert in V IOJJ Jlll -L.V I `S LIE; 0 O-.ppppCo OO ~ 0- Q' Odd d Od ch V(reduction)=1.8 fps V(reduction)=11.9 fps V(n=duction)=2.7 fps V(reduction)=2.2 fps Q~ d N N ~ M N N v-
Bioretention Surface Area 2,038 sq. ft, N `r
Bioretention Surface Area 944 sq. ff. Drainage Area 1.06 ac. (on-site and off-site drainage to the basin 1310 AREA #5 BIO AREA #6 1310 AREA #7
Im ious Area ) Drainage Area 0.51 ac. (on-site and off-site drains a to the perv 0.90 ac. (on-site and off-site drainage to the basin) Impervious A g ) BIO AREA #8 Q=c*I*A Q=c*I*A Q=c*I*A
Rational C Coefficient 0,85 Area 0.43 ac. (on-site and off site drainage to the basin) Rational C Coefficient 0.85 Q=c I A Q=0.85*(7.03 in/hr)*(0.45Ac)=2.69 cfs Q=0.85*(7.03 inlhr)* 0.51Ac =3,05 cfs Q=0.85* .03 in/hr)*(1.96Ac= 11.71 cis Q- -0.85 * _
Size % 5 % (either 5% in wlsand under drain or 7% in wfo ° ° ) Size /0 5 k (either 5°/° in wlsand under drain or 7% ( ) (7 ) (7.03 m/hr)(0.73Ac)4.36 cfs V(pavement =4.5 s V avement)=4 - Z
in w/o) Inlet velocity 2.1 fps SEE DETAILED I Inlet SEE DET fP (p .4 fps V(pavement)-2.4 fps V(avement)=4.1 fps P V(grass step)=2.5 fps V(grass step)=2.4 fps V(grass strip)=1.3 fps V(srass stfiP)=2.5
Inlet flow depth 1,62 INLET VELOCITY Velocity 1.9 fps AHED INLET VELOCITY fps J V(reduction)=2.0 fps V(reduction)=2.0 fps V(reduction)=1.1 fps V(reduction)=1.6 fps Uj 0
in CALCULATIONS, THIS SHEET. Inlet flow depth 1,04 CALCULATIONS, THIS SHEET. Depth to Ground Water 8,20 ft. in
Planting Soil Infiltration Rate 1.5 in./hr. (thDepth to Ground Water 8.04 ft. e soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 in./hr.
(the soil layer down to 4 feet) In-Situ Soil Infiltration Rate 1.02 in./hr. (the soil layer below 4 feet or below the sand bed In-Situ Sod Infiltration Rate 1.05 in./hr. (the sotl layer below 4 feet or below the sand bed) INLET DEFLECTOR VELOCITY REDUCTION
II. REQUIRED ITEMS CHECKLIST For all BIO Retention Areas Inlet defelctors were assumed to reduce velocity by
II, REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supportin documentation is attached. If 9 a Initial in the space provided to indicate the following design requirements have been met and supportin documentation is attached. 0.5 feet per second. This assumption is based on field experience and is a conservative estimate.
requirement has not been met, attach an explanation of why. At a minimum, a complete stomtwater management plan submittal includes re g if a .d. if a I-
a worksheet for each BMP, desr n calculations tans andspecifications p qurrement has not been met, attach an explanation of why. At a minimum, a complete stormwater mans ement Ian submittal includes g n p showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, desi n calculations lans and g p drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal acka a will result in a r g , p specifications showing all BMPs and outlet structure details, a detailed dudes
p 9 equest for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal acka a will result in a rue additional information and will substantially delay final review and approval of the project. P 9 eq st for letailed INLET VELOCITY CALCULATIONS pest for
additional information and will substantially delay final review and approval of the project.
Applicants Initials li 0 No vertical sand bed is cants Initials J BIO AREA #1 BI O AREA #2 BI O AREA #3 BI O AREA #4 W
proposed No vertical sand bed is r sed 0 The bioretention area is at least 40 feet by 15 feet. p
4 The bioretention area is at le t least 40 feet by 15 feel. 0 Sheet flow is provided at inlet. V(pavement 4.2 s Vavem ) ent ( 4.2 s V(pavement) p ) 5.9 s V(pavement) 5.0 s UJ
0 Water fabledepth is rester than 6 feet ~ Sheet flow is provided at inlet. g 0 Water tabledepth is greater than 6 feel. V lant strip reduction 1.8 s V I _ p ) ant stn reduction 1.9 s V (plant p ) lant strip reduction
Minimum of 6' ponding is provided. TO- The ponded area will draw down in less than 4 days. Minimum of 6" ponding is provided. 2.7 s V(pIan ) t strip reduction 2.2 fps) V(inlet deflector reduction 0.5 s V inl
The ponded area will draw down in less than 4 tla s. et deflector reduction ( ( 05 s V ) inl ( et deflector reduction s V(mle ( t (0.5 deflector reduction (0.5 s
Planting soil infiltration rate is greater than 0.52 in/hr. y Planting soil infiltration rate is greater than 0.52 in/hr. The in-situ soil infiltration rate is greater than 0.2 in/hr. Expected Inlet Velocity 1.9 fps Expected Inlet Velocity 1.8 fps
The in-situ soli infiltration tale is greater than 02 irJhr. 1/6 A planting plan with species and densities is provided. A Expected Inlet Velocity 2.7 fp s Expected Inlet Velocity - 2.3 fps (:0 0
planting plan with species and densities is provided. Mulch layer is specified in plans.
Mulch layer is specified in plans. .1 D Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana ement BIO AREA #5 BIO AREA #6 BIO AREA #7 BIO AREA #8 ~
Practices Manual April 1999 g JD Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana ement ) Practices Manual April 1999,~ g V a~ement 4.5 s V
J0 Plan details for the bioretention area provided. JQ Plan details for the bioretention area provided. 116 Plan details for the inlet and outlet are provided. p pavement 4.4 s V avement p ) 2.4 s V(pavement) 4.1 s
Plan details for the inlet and outlet are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. Vplant strip reduction 0 s V (2. 0 ) lant strip reduction 2. (p s V Iant strip ( reduction 1.1
_ An operation and maintenance agreement signed and notarized by the responsible party is provided. ) s V pIan p ) t strip reduction) (1.6 s V (inlet deflector reduction (0.5 s V i
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdrams beneath the planting soil are acceptable in the Piedmont and Mountains nlet deflector reduction 0.5 fps) V (inlet deflector reduction (0.5 s V inl et deflector reduction (0.5 fps) CC M
.Expected Inlet Velocity = 2.0 fps' s Expected - Inlet Veloci 1.9 fps Z
p ty= Expected Inlet Veloci 0.8 fps ty_ Expected Inlet Velocity - 2.0 fps
I W PER THE NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES STORMWATER BEST MANAGEMENT PRACTICES MANUAL, 4, SECTION 5, IT IS RECOMMENDED THAT THE MAXIMUM INFLOW SHEET FLOW VELOCITY FOR PLANTED um Z
i J GROUND COVER BE 3 FEET PER SECOND. THE HYDRAULIC CALCULATIONS ABOVE INDICATE THAT INLET VELOCITIES FOR ALL BIO RETENTION AREAS ON SITE WILL BE LESS THAN 3 FPS. THEREFORE, WE FEEL THAT THE BIO RETENTION AREAS SHOWN ON THIS
I PLAN HAVE BEEN DESIGNED TO ACCEPTABLE STANDARDS.
W
File No. NC Tax Map No, Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001BMP3
SHEET: D7AOF D20

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IN CURB (TYP.) LL Q J N L~ v PONDED = cn~o~ ~ o Joo O D CD
1~ ~ 6' ~ 6 PROP. CURB Z=~~ 6' ~ BIORETEN110N SIZING COMPUTATIONS WATER DEPTH U ~ - 6 f o~ o ter` O lf) D r -
NON BIORETE Tl ~7 ~ * _ « TOP EL.=759.60 Q ~ o M M Q a I I 0 00 LC)
TOP=771.80 DRAINAGE AREA A C FACTOR 5% (WITH SAND BED) _ ,_j ~_I I z c~ I'~ o Q ~ N N ~ - - __'i'_' _ _ _,.,~,.__,~.•:-:•.--~-r_:ji III II.-~~~~ ~ pO~~.~,~ W Wei-v-. V N -rte
- Rnrrc~=~n 3 ~ i ~ -SIZE OF BIORETENTION AREA QnTrnu n _7ro t~~ ~ r~ ~ _ . _ _ . _ _ . _ . ~ z a ci nor _ tzi ,..0000 „ oa o0 Q 00
LL- rL- Li w Mer.i 9=1 O N m S --I- N 14
i b' 0.73 AC ~ 0.85 * 0.05 = 0.031 AC. - 1,351 SF U-
PLANTING SOIL=
-d I I=
t 6" 1/4" PEA GRAVEL
J V BIORETENTION #7 - =~1 MIN. SAND BED'<,,.,.`~;
ASTM C-33i_I (USE CONC. SAND)
u c o`'o 0 0 0
N PLANTING COVER COMPUTATIONS o ° ° c ° c ° ' c N z LLI 0 BIORETENTIO
BIORETENTION AREA #8 = 1,541 SF = 0.035 AC. 6.0' 6" PERFORATED C
PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. _ PLAN
TOTAL PLANTINGS REQUIRED _ - 35 PLANTINGS #57 STONE 15,0' AVG. PVC VIEW PIPE FOR (SEE INVERTS
- 35 SHRUBS /TREES TOTAL PLANTINGS PROVIDED _ )
SECTION 0-0 W C
N.T.S.
:311 lliiiiiiim C
BIORETENTION SIZING COMPUTATIONS SCALE: 1 "=20'
DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) 6" PONDED an > J s
= SIZE OF BIORETENTION AREA PTH 3 OF 12 MONTHS AGED MULCH WATER DE
I ~1:5:~,nrz, - -1, u-, , 1 7m w w
1.96 AC * 0.85 * 0.05 = 0.083 AC. = 3,629 SF 6 3" OF 12 MONTHS AGED MULCH =1=1 TOP I~
" PONDED 6" PONDED " OF 12 MONTHS WATER DEPTH PROP. CURB WATER DEPTH 3 JF 12 M0 EL.=759.60 I _I I!~ l l„ 0 ui LATHS AGED MULCH
TTOM EL.=759.10 BO I I=i I _ - 3:1 SLOPE Z
TOP EL.=VARIES TOP EL. VARIES 1-= I-- - fTcP EL.=VARIES L.=VARIES 4 MIN._'
- ~!I=11i: W PLANTING SOIL= TOP EL.=VARIES ! =1 -
BIORETENTION PLANTING COVER COMPUTATIONS BOTTOM EL.=VARIES 3:1 SLOPE _i _ _ - .Ii- BOTTOM EL._ -VARIES 7. L~ - - - ' I- - - ! _
BIORETENTION AREA 7 = 3,842 SF = 0.088 AC. =111 4 MIN. ii-1--
NT = 1,000 PLANTINGS/AC. Ii _-,PLANTING 4 MIN._ PLANTING REQUIREME N i!- 3:1 SLOPE 6" 1/4" PEA GRAVEL
ANTINGS PLANTING SOIL___ TOTAL PLANTINGS REQUIRED = 88 PL _ 0 SOIL MIN SAND BED 7- 7 1 MIN. 9„
TOTAL - PLANTINGS PROVIDED = 88 SHRUBS / TREES 11 1:- 6" 1/4" PEA GRAVEL - (l
1' MIN SAND BED` - . - -f! 6" 1/4" PEA GRAVEL _ - -
(USE ASTM C-33 SAND BED CONC. SAND AND . BED,`- 0 MIN. 9' 112 0' 6 PERFORATED - PVC PIPE m
v 0 C, v a r~ 0 - _
~ #57 STONE
BIORETENTION r,0 0 ~0^~ - EXPECTED VELOCITY ;Y, _ RATED 38.0' u
THE TERRACED DESIGN OF THIS BIO-RETENTION 5.0 6PERFO 57 STONE PVC PIPE (SEE PLAN 3.0' 6" PERFORATED SECTION P-P W N.T.S. ~ PVC PIPE
ISLAND IS INTENDED TO SERVE AS A VELOCITY # 10.0 AVG. VIEW FOR INVERTS) #57 STONE
CONTROL MEASURE. MULTIPLE OPENINGS THOUGHOUT _ SECTION N N M DRAINAGE SYSTEM CONFIGURAl10N - 11~ BIORETENTION FILTER ION WIN (TYP)
THE ISLAND WILL ALSO SERVE TO EVENLY DISTRIBUTE SECTION M-M (TYP.) N.T.S. rsi .:-.6 c'LT.S. SCALE: AS SHOWN
THE FLOW THROUGH THE ISLAND. HYDRAULIC ANALYSIS INDICATES THAT THE MAXIMUM VELOCITY EXPECTED IN N.T.S. W SEP 2 3 2003
BIO-RETENTION ISLAND #7 IS 0.8 FEET PER SECOND. BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION
SCALE: AS SHOWN NATER SHEET: D11OF D20 i20
wg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE
File No. NC Tax Map No. Job No. 03-001 Cadd D

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~4 II IONS AND STRUCTU `~'ta. ~ ~ , ~ ~ RE DETAI D17. LEVEL SP LS w r READERS AND Z r, ^~,~~r;, ~ OUTFACE EROSION CONTROL
I 1 ~ D18. E MEASURES ~ ` ' / XTENDED DETENTI ~ t : , , ON WETLANDS 2
1 I ~ r ~ ,w. r „ , # SECTIONS ~ ~ . ~ ~ ; ~ ! D19. EXTENDED DETENTIO
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ATTN: MR. RODERYCK BLAKE; MR. MIKE ~ ' ~ / MOUKALIAN 2 ~ , PHONE: 1-800-TAIiR ~ ~ ~
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DRAINAGE AREA = 0. DRAINAGE r~
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DRAINA 06 Ac. a INA AREA 1. DRA 0
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_ .?t ~ ~j 00 X INAGE AREA 116 Ac. ~F,,:,. . - w z w Q DRA ~ ~ wo
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Z Qz i i '0'AA ~ a~ i i W ~ ~Q~~ V! V V _MM
VI WO~CO Z ~ Jdw'000~
ALL STORMWATER MANAGEMENT AND ~ I~iHpryM ~ V O>MM Qtr NWt~M
BMP REQUIREMENTS FOR THIS PARCEL ~w jai (n .'0~^i
WILL BE TREATED SEPARATELY WITH ITS FUTURE DEVELOPMENT. THE ~ n Ow GE ARE~c - 0.96 A DRAINA
~ RAINAGE OUTFALL FOR THIS PARCEL D O 1 '1 ~i In
G• YED THROUGH WILL NOT BE CONVE L__J
MALL PROPERTY. THE
• O 0
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M ~ M
~ , / :Q ~ Qa
e / ~ ~c~ Q oc?
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i ~ BIORETENTION AREA MAP C)
SCALE: 1"=200a
EXTENDED DETENTION WETLANDS AREA MAP
SCALE: 1"=200' a J ~ a~c
> mi z
Q LEGEND a
TO STORMWATER T'REATMEN'T AREA a. s~o~HnoN arR,s u~ W z }
UTILIZING THE NATURAL FLOODPLAW
Am5010 Ac. ¦ ~ ~ ~ TO EXPENDED DETENTION WETLAND #2
1 ~ M ¦ MAJOR DRAINAGE DIVIDE Z
DRAINAGE AREA TO BIORETEMION Q Q O O
A=t146 Ac. • • MAW OIJTFALL V
TO EXTENDED DETENTION WETLAND 83
A=73.89 Ac. 4 WETLANDS TO REMAIN m ~ V P. a
wn m
O W
Z J
v
W
SHEET: DS OF D20
\
Foe No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030018MP XREF: DRAINAGE PLAN STAiE/03001BASE

~ ~
REA DEPTH DISTRIBUTION REQUIRED: ~ 0
MINIMUM EXTENDED DETENTION WETLAND A U U,
GENERAL NOTES: NENT POOL AREA ~ DIMENT FOREBAY 20~ OF PERMA ) 1. SE ( = z
U -
F THE EXTENDED DETENTION WETLANDS BASINS 2 AND 3) WERE DESIGNED IN ALL 0 ( # # ° OF PERMANENT POOL AREA, 0 TO 9 DEEP) 2. HIGH MARSH (35~ Y Q
CONFORMANCE WITH THE RULES CONTAINED IN THE NCDENR STORMWATER BEST
MANAGEMENT PRACTICES MANUAL FROM APRIL 1999. ALL OF THE BASINS HAVE BEEN
DESIGNED TO ACHIEVE 85% TOTAL SUSPENDED SOLIDS (TSS) REMOVAL, AND THE FIRST O
INCH OF RAINFALL WILL BE RELEASED OVER A DRAWDOWN PERIOD OF 48 TO 120 OF PERMANENT POOL AREA, 9" TO 18" DEEP) 3. LOW MARSH (35~ p
HOURS 2 TO 5 DAYS . RUNOFF CONTROL MEASURES SHOWN ON THIS PLAN HAVE ( z + + + + + + N
BEEN DESIGNED TO MEET OR EXCEED NORTH CAROLINA STATE GUIDELINES FOR + + + + + N
EXTENDED DETENTION WETLANDS. + + + + + + ttttttt~ g
RMANENT POOL AREA Z 4. MICROPOOL (10~ OF PE
5
~ T i M
~ N U S o
MN 0 ' °j O a0
U ~ ~ ~ rr
~ J ~
~ J G a
1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO BASIN #1: 0 BASIN p Q .i`, o 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING T ~ Z LL 3ASIN #1:
1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO TREATMENT AREA ~1: W
AMOUNT OF IMPERVIOUS AREA = 10.16 Ac. = 89% AMOUNT OF IMPERVIOUS AREA 59.04 Ac. _ ~ !L _ - 80~ p ~ z
AMOUNT OF IMPERVIOUS AREA = 45.10 Ac. = 90% TOTAL SITE AREA TO BASIN #1 11.46 Ac. TOTAL SITE AREA TO BASIN #1 73.89 Ac.
TOTAL SITE AREA TO BASIN #1 50.10 Ac. W Q ~ Z ~
~ ~ N
n.Za
2. DETERMINE AVERAGE PERMANENT POOL DEPTH: 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: ~ W o. 0
2. DETERMINE AVERAGE PERMANENT POOL DEPTH: PERMANENT POOL DEPTH = 3.0 ~
PERMANENT POOL DEPTH = 3.0' PERMANENT POOL DEPTH = 3.0 0
3. FlND CORRESPONDING NUMBER FROM TABLE 1.t: FIND CORRESPONDING NUMBER FROM TABLE 1.1: 3.
3. FlND CORRESPONDING NUMBER FROM TABLE 1.1:
• • Table 1.1 Sw fue Am co Drain~e Ana Ratio For Permanent Pool Sizio~ For 8S~ PoquWit 'oc:+ Svrug Fot 8596 Pollutant
e 1.1 Surface Area to Drainage Ana Ratio Far Permanent Poc~ Sizing Fot 85 Table 1.1 Surface Area to Area Ratio For Permanent Pool Sizing Fot 8596 Polluant T~ Drainage Removal Efficiency in the Piedmont Removal Efficiency im the Piedmont ~ti~~uiuuu?nrnrr
Removal Efficiency in the Piedmont I yr~~~~~i
96 Impervious % Impervious Cover 3.0 4.0 S.0 6.0 .0 9.0 v o° °°e
.0 9.0 Cover 3.0 4.0 5.0 6.0 ?.0 Coves 3.0 4.0 5.0 6.0 7.0 8 ~ . n ~
.7 O.S 0.51 .46 44 U ~ S : 20 .79 0 0 c~ 0.51 .46 0.44
0,97 .79 .70 .0.59 0.51 0.97 .74 0.70 .0.9 0.51 0.46 44 ~ 20 0.64 0.62 ~ S ~ o°° ~ 30 1'. 1, 4.70
1'.34 1.08 0.97 0.8 0.70 30 1'.34 1.08 .97 0.83 0.70 0.64 .2 0.70 0.64 0.62 ° .2S 0.90 0.82 77 dp °o°° ~C 40 i.73 1.43 ~F
.90 0.62 40 1.73 1.43 1.25 0• ~ .77 40 1.73 1.43 1.25 1.05 0 0.90 0.82 .09 1. q~~~i ~ p\`~~ SO 2.06 1.73 1.50 1.30 i
1.00 .0.92 50 2.06 1.73 1.50 1.09 1.09 1.(10 ''rrnnrrniumnuau~?`,` .40 2.03 1.71 L51 i.29 t8 1.10
50 2.06 1.73 1.50 t.30 1.09 1.18 1.10 60 Z.40 2.03 1.71 1.29 i.29 1.l8 1.1 .40 7 .7 1.54 1.
2,03 1.71 1.51 129 1. S 1.26 7 . 8 .40 .07 1.54 1.54 1. S . 6 7 ~ 210 1.86 1.42 c
70 2.8 2.40 .07 1.79 1.54 1.86 i.4
1.60 1.42 80 2.78 0 1.86 80 3.36 .7 2 2.1 1.86 90 74 . 3.10 2.66 2.11 . 4 3 2.11 .83 1.67 2.11 1.83 1.67
9p 3.74<:: 3.10 2.66 2.34 2.1[ 1.83 L67 'ven io die bad of the table arc given in pacentages.
Nooea: Numbers given in the body of the table are given in pp+xtttages. Notes: Numben>lx Y g~ Coastal SA/DA ratios can be obtained from the local DWQ Regional
Nodes: Numbers given in the body of the table aR given in petreutages. Coastal SANA ratios can be obtained from the local DWQ Regional c~ Q Regional Office.
Coastal SA/DA t~tios can be obtained from the local DWQ Regional Offi FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APR FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 NCDENR, APRIL 1999
FROM: STORMWATER BEST MANAGEIuIENT PRACTICES, NCDENR, APRIL 1999
4. DETERMINE REQUIRED SURFACE AREA:
4. DETERMINE REQUIRED SURFACE AREA:
4. DETERMINE REQUIRED SURFACE AREA: NUMBER FROM TABLE 1.1 ABOVE x G DRAINAGE AREA =SURFACE AREA
NUMBER FROM TABLE 1.1 ABOVE x RAINAGE AREA NUMBER FROM TABLE 1.1 ABOVE =SURFACE AREA CONTRIBUTING D = A CONTRIBUTIN AINAGE AREA SURFACE ARE 100
x CONTRIBUTING DRAINAGE AREA 1D0 100 0
3.74 x .0.43 Ac. = 18,670 SF (Si 3.36 x qc, = 2.48 Ac. = 108,147 S (SURFACE AREA REQUIRED) a
3.74 = 1.87 Ac. = 81620 SF SURFACE AREA REQUIRED) 11.46 A x 50.10 Ac. ~ ( 100 SF SURFACE AREA REQUIRED 73.89 ;,670 ( ) 100 ~ W
100 0
SURFACE AREA PROVIDED = 22,895 SF SURFACE AREA PROVIDED = 110,248 S
SURFACE AREA PROVIDED = 82,193 SF
0 z
NOTE: 5. FlND VOLUME TO BE CONTROLLED FROM 1' STORM:
STORMWATER TREATMENT AREA 1 UTILIZES THE NATURAL 5. FIND VOLUME TO BE CONTROLLED FROM 1" STORM:
FLOODPLAIN AT THE OUTFACE OF THE PIPE.. THE . , THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER QUALITY rn
COMPUTATIONS ABOVE DEMONSTRATE THE SURFACE AREA TO TEMPORARY WATER OUnLITY THE DESIGN RUNOFF VOLUME (THE ~ QUALITY POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE
BE CLAIMED BY THE NATURAL DOWNSTREAM AREA. POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE SEE SHEET D17 FOR OUTFACE DETAIL AND RIP RAP SIN ABOVE Q THE PERMANENT POOL LEVEL.
THE PERMANENT POOL LEVEL. COMPUTATIONS.
USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPLE USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPLE ~ SMPLE
METHOD" AS DESCRIBED BY SCHUELER (1987): METHOD„ AS DESCRIBED BY SCHUELER (1987): Q ~ 8
s
SURFACE AREA OF STORMWATER TREATMENT AREA = i V r k' Rv 0.05 + 0.009 z W - M
U1ILIZING THE NATURAL FLOODPLAIN Rv = 0.05 + 0.009 (I) STORM RUNOFF INCHES ~ ~ ~N ( )
STORM RUNOFF (INCHES) WHERE Rv =RUNOFF COEFFICIENT = STORM RAINFALL INCHES IFF (INCHES) WHERE Rv =RUNOFF COEFFICIENT = , ~ W~ X ~ STORM RAINFALL (INCHES) ~ ~3 a z Z wo ~
( ) ~ o BALL (INCHES) zZ ~ ~Q~
AREA ACRES W ~ ~ . ° ~ ~ ~ ~ IMPERVIOUS PORTION OF DRAINAGE U a,,, ~ ~ Z o ~ ~
IMPERVIOUS PORTION OF DR. I =PERCENT IMPERVIOUS = DRAINAGE AREA A ORTION OF DRAINAGE AREA ACRES I =PERCENT IMPERVIOUS = z zzi'`i' O Q o°Nr DRAINAGE AREA (ACRES) ~ a a o0 0, U V N N
JAGE AREA (ACRES) ~ ; ~ - ? ~ ~ ~ J IY
~1""MM V OZr7M - ~at\f` ~ NWOMM
Rv = 0.05 + 0.009 (89) = 0.85 (IN./IN.) Rv = 0.05 + 0.009 (80) - 0.77 (IN./IN.) ~Ww N mow
VOLUME TO BE CONTROLLED:
VOLUME TO BE CONTROLLED:
VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA)
VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA)
1 FT. 1 FT. VOLUME = 1 INCH x 0.77 IN./IN. x x 73.89 Ac. S o
VOLUME = 1 INCH x 0.85 IN./IN. x x 11.46 Ac. 12 INCH ~ Ac. 12 INCH ~ ~
- ~o
VOLUME = 0.812 ACRE-FEET = 35,360 CF Q VOLUME = 4.741 ACRE-FEET = 206,530 CF ~ o.. .Z ~ oZ
Q Q to O oar
THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 D. THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 DAYS. ~ _ U ~ _ OF2T05DAYS. Z ~ X Y ~ X
QQ Q
N N IQi J f/'1 4. J~~ ~~Oc00
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.~11EMAIN. ! l -Z74/- 04 + 1 S' / I y 1 + + ( UJ
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STORMWATER TREATMENT AREA (S *r=NDED DETENTION WETLAND #2 M #2 (SEE SHEET D18 FOR DETAIL) EXTENDED DETENTION WETLAND #3 (SEE SHEET 19 FOR DETAIL) SCALE: 1"=100'
THE NATURAL FLOODPLAIN (SEE SHEET D17 FOR DETAIL) SCALE: 1"=50' UTILIZING
SCALE: 1"=100' SHEET: D6 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/03001BMP1 XREF: DRAINAGE/03001 BASE

Project No. DWQ 021204 to be rovided b DW ~ P Y Ql
Project No. DWQ 021204
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET (to be provided by DWQf
DWO Stormwater Management Plan Review DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKS
A complete stormwater management lan submittal includes a wet detenti DW Stormwater Mana ement Plan Review: HEET
P on basin worksheet for each basin, design calculations, plaits and specifications showing all basin and outlet structure details, and a fully executed ~ ~ f- O A complete stormwater management plan submittal includes a wet detention basin wo
operation and maintenance agreement. An incomplete submittal package will result in a request for additional design calculations, fans ands ecificatio rksheet for each basin, V P p ns showing all basin and outlet structure details, and a fully executed
information and will substantially delay final review and approval of the project. operahon and maintenance agreement. An incomplete submuta! acka a will re V
I. PROJECT INFORMATION (please complete the following information}: P g salt rn a request for additional 2 Z tnformatron and will substantially delay final review and approval of the ro'ect. U
Project Name : NORTIiLAKE VILLAGE P1 i. PROJECT INFORMATION (please complete the following information : Y
Contact Person: JILL OLJNGER Phone Number: 703 532-6163 Project Name : NORTNLAKE ~ VILLAGE W
For projects with multiple basins, specify which basin this worksheet a tics PA to EDW ~2 Contact Person: -JILL OLINGER Phone Number; ~
Basin Bottom Elevation 731.50 ft. (average elevation of the floor of the basin) F r (7031532-6163 o protects with multiple basins, specify which basin this worksheet applies to: W ~ V o
Pemianent Pool Elevation 7 3.00 ft. (elevation of the orifice invert out} f0 Basin Bottom Elevation 732.50 ft. (average elevation of the floor of
Temporary Pool Elevation 734.09 fl, (elevaron of stie ~t:;le: ;.:~tc~;.:aver, in) ?..:..u::~.:r ..c°%~::cr. the basrtrl it. ~eievation of the onice invert out O
Temporary Pool Elevation ft. } N (elevatton of the outlet structure invert in N
Permanent Pool Surface Area 22.8,x„_ sq, ft. (water surface area at permanent pool elevation} Drainage Area 11.46 ac. (on-site and off site drainage to the basin) cn g
Impervious Area 11.46 ac, (on-site and off site drainage to the basin) Pemtanent Pool Surface Area s ft. water surface area at rmanent ~ q' ( Pe ool elevation Z Drainage Area ac. o - ' P ) W
_ (n site and off site drainage to the basin Z impervious Area 73.89 ac. ) Z
Permanent Pool Volume 31.517 cu. ft. (combined volume of main basin and forebay) (on-site and off-site drainage to the basin) ~ S
Temporary Pool Volume 35.360 cu. ft. (volume detained on top of the permanent pool) Permanent Pool Volume 158.149 cu. ft. (combined volume of ~
Foreba Volume cu. ft, ~ Y 6.303 tnartr basin and forebay} I Temporary Pool Volume 206.530 cu. ft. (volume detained on to of the e ~ ~ U °
~22 ,8,9,~5__ 1 P p mtanent pool) ~ ~ s Forebay Volume _ 31,630 cu, ft, f~ N
SA/DA used 4yy,lyt3 'f'f su ( dace area to drainage area iaho) O O ~ o 110 248_ 1 = t
Diameter of Orifice 2.25 in. {draw down orifice diameter) SA/DA used 3~$f,~$- ~ V N> (surface area to drainage area ratio) ~ ^ ~
II. REQUIRED ITEMS CHECKLIST Diameter of Orifice 5.50 in. (draw down orifice diameter ~ N
The following checklist outlines design requirements per the Stormwater Best Management Practices manual } U) M II. REQUIRED ITEMS CHECKLIST O o
(N.C. Department of Environment, Heath and Natural Resources, November 1995) and Adtrunistrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have Dora The following checklist outlrnes design requirements per the Stormwater Best Mana emen Z IL v
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of (N.C. Department of Environmen Healt g t Practices manual t, hand Natural Resources, November 1995) and Administrative Code W
why. Section: 15 A NCAC ?H .1008. Initial in the space provided to indicate the foliowin desi r ~ g gn equtnments have ~ Z LL been met and supporting documentation is attached. !Ja requirement has nor been met attach 0
Applicants Initials an explanation of OC why. ~ W
~ The temporary pao(controis runoff from the l inch storm event. W Q ~ Applicants Initials Z
?0 The basin length to width ratio is greater than 3:1. ~ The temporary pool controls runoff from the 1 inch to ~ N
.1b The basin side slopes are no steeper than 3:1. s rm event. Z Q JO The basin length to width ratio is eater than 3:1.
N A A submerged and vegetated perimeter shelf at less than 6:I is rovided. F ~ W p. JO The basin side slopes are no stee er than 3:1. ~
SEE LANDSCAPE P Vegetation to the permanent pool elevation is specified. NA p 0 J M ~_A submerged and vegetated enmeter shelf at less f\ P than 6:1 is provided. O O ,z~
Q An emergency drain is provided to drain the basin. N A The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet), SEE LANDSCA E P N Vegetation to the permanent pool elevation is s ecified. N ~ o P - _
d The temporary pool draws down in 2 to 5 days. An emergency drain is provided to drain the basin. N N A The permanent pool depth is between 3 and 6 feet re aired minima
j(__The forebay volume is approximately equal to 20%of the total basin volume. (q m of 3 feet}, a b The temporary pool draws down in 2 to 5 da s. ~;.i
Sediment storage is provided in the permanent pool. ` J ,,~_The forebay volume is approximately equal to 20% of the total basin v
Access is provided for maintenance. olume. ~ Sediment storage is provided in the permanent pool.
~/A A minimum 30-foot vegetative filter is provided at the outlet. A site specific operation and maintenance (0&M} plan is provided, Access is provided for maintenance.
A vegetation managementlmowing schedule is provided in the 0&M plan. ~/A A minimum 30-foot vegetative filter is rovided at the out e P 1 t.
Serni-annual inspections are specified in the 0&M plan. A site specific operation and maintenance (0&M) plan is provided. ,,111 uw°ttrrrrrrryiq A vegetation management/mowing schedule is provided in the 0&M Ian. \\`\\\\I r4r~~r.
A debris check is specified in the 0&M plan to be performed aftereverystorm event. P saaaoe ~ ~~i Semi-annual inspections aze specified in the 0&M plan, °eo '
. d A specific sediment clean-out benchmark is listed (elevation or depth) in 0&M lan. P ~Ov o M~~~$ A debris check is specified in the 0&M plan to be performed after every storm event. '
~_A responsible parry is designated in the 0&M plan. FORM SWG100 09'97 Page 1 of 1 A specific sediment clean-out benchmark is listed (elevation or depth) in 0&M tan. ? ~
~_A responsible party is designated in the O&M tan. _ 4 P oW N N "o ~ ° FOR41 SWG100 09197 Page 1 of t o 9 0~
S "e~ u
V/t~~ 00~
'j~~o" Y 000 ~
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT ~ f j I! I I I I l l l I I N 11111\I IIIINIIII
(NORTMLAKE VILLAGE -EXTENDED DETENTION WETLAND #2) WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
(NORTHLAKE VILLAGE -EXTENDED DET N a
The wetland detention basin s stem is defined as the wetland detention basin and retreatment incl di Y p u rig E TION WETLAND #3) o
forebays. The wetland detention basin system is defined as the wetland detention basin and pretreatment includin
Maintenance activities shall be performed as follows: g forebays.
1, After every significant runoff producing rainfall event and at least monthly: Maintenance activities shall be performed as follows:
a. fns ect the wetland detention basin s stem for sediment accumulation erasion trash a cu l P Y c mu atlon, 1. After every significant runoff producing rainfall event and at least monthly:
vegetated cover, and general condition. a. Inspect the wetland 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. b. Check and clear the orifice of an obstructions such th y at drawdown of the temporary pool occurs within
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow 2 to 5 days as designed.
vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 0
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow a
3, Inspect and repair the collection system (i.e. catch basins, piping, swales, tiptop, etc.) quarterly to vegetative cover to maintain a maximum height of six inches, and remove trash as needed. ~
maintain proper functioning. 0 3. inspect and repair the collection system (i.e, catch basins, piping, swales, tiptop, etc.) quarter) to
Y maintain proper functioning.
4. Remove accumulated sediment from the wetland 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 4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is °
(i.e. stockpiling near a wetland detention basin or stream, etc.). Z 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 uali q tY
The measuring device used to determine the sediment elevation shall be such that it will give an accurate (i.e. stockpiling near a wetland detention basin or stream, etc.).
depth reading and not readily penetrate into accumulated sediments.
The measuring device used to determine the sediment a?evation shall be such that it will give an accurate de th readin a d n t g p g n o readily penetrate into accumulated sediments. U
When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. O
For stormwater wetlands: If the elevation of the marsh areas exceed the ermanent ool elevation the P P , .When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. ~
sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the Q M
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 sedtment should be removed to design levels. This shall be performed b removin the u er 6 inches of Q Y 9 pp tv ^ N
for more than two weeks. soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations. U °
Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stock filed W
When the permanent pool depth reads 4.5 feet in the forebay and micro-pool, the sediment shall be for more than tw P ~ NN o weeks. ~ -o W t- t>0 x
removed. 7 03 ~ _ ~p When the permanent pool depth reads 4.5 feet in the forebay and micro- ool, the sediment shall be z°o a ~°a
P ~ ~ 4~ removed, W aw~^ Z Zo
BASIN DIAGRAM Z Q2 I ul O ~ ~ON^ Q ~QoJ00 U V NN
(fill in the blanks) BASIN DIAGRAM ~ wo~~ Z MM
p Permanent Pool Elevation 733.0 0 Q' 1"~ J ~ 00 OO (fill in the blanks z ~ N ~ Q ~ o ~
w ~ ^ 0
Sediment moval EI.728.5 7 /o p Permanent Pool Elevation 734.0
Sediment Removal Elevation 733.0 0%
Bottom E vation 727,0 5% Sediment moval EI.729.5 7 /o
0 Sediment Removal Elevation 734.0 0% Bottom E vation 728.0 5°/0
°
FOREBAY MAIN POND
FOREBAY MAIN POND ^ o ~M
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These N~' Q
plants shall be encouraged to grow along the vegetated shelf and forebay berm. 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These ~ o Z
IN- O Q~ plants shall be encouraged to grow along the vegetated shelf and forebay berm. = o- ~ U
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. s w~ Wetland planting densities in the marsh areas should be maintained b re lantin bare ~ - ~
Y P 9 areas as needed. Wetland plants should be encouraged to grow in the marsh areas. ~ ~ ~ c~ ~ °
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment ~'x ~ ~ s~ ~
through the emergen;.y drain shall be minimized to the maximum extent practical. 6, If the basin must be drained for an emergency or to perform maintenance, the flushin of sediment ~ M N W ~ ~
9 throu h the emer enc drain shall be minimi t ? ^ ^ ~ a ~ N N 9 9 Y zed o the maximum extent practical, ~ ° ~ W o~ ° ,Y, w ~
7. A!I components of the wetland detention basin system shall be maintained in good working order, i1 oQ~~ go~~ 7 ~ M~~v O NmNN
7. All components of the wetland detention basin system shall be maintained in good workin order. g
R I anal snraariars nr nthar stn ~rh eras that nrnviria rliffi ica flnw shall ha maintainarl avan, civ mnn+hc All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be 8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
replanted as necessary. 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 J I acknowledge and agree by my signature below that I am responsible for the performance of the seven
changes to the system or responsible party. maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any LU
changes to the system or responsible party. Ca (D
Print name: F, • L o e L L L Print name: T - 0.r o - LLC
Title: o iec~ S cr
E. Lin . ~-,ZA, alc.ewAitA ;lL I 4 $36y Addre: T r ou Lt Title: ki~xrjr--z-,,zA %-2 c c
Address: aoo £ Lon La~.z"~ ~o e3Iq
Phon : x.48- 8- $00 t Phone: c % - ' 00
Signatu
Date: C Co cc Signature:
Date: b 3 G
J
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. Note: The legally responsible party should not be a homeowners association unless more than 50% of the 0 UJ
lots have been sold and a resident of the subdivision has been named the president.
I V t ti U1 (4- , L~ , a Notary Public for the State of Q, C-1 Y\
I, a a e a Notary Public for the State of ,
County of do hereby certify that . e L~ County of N 0-Q.G-" do hereby certify that i g
personally appeared before me this 3 r day of X03 , and acknowledge the due h ec~.~
execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official personally appeared before me this rc _ day of u 0)-03, and acknowledge the due
execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official
seal, KAREN A. MOAENCY seal,
Nohry PUW, MooomD County, MI
Actin in DOW Co., MI My Commission Expires 12/27/2007 KAREN A. MORENCY Cia
Notary pd*, Mwomb Coumy, MI
Acft in lend Co., M1
My CW=95 on bcpm 121271!007
m
0 0 z W
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SEAL ale
SEAL
My commission expires ~ i ri t)' MY commission expires G
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP1
SHEET: D7 OF D20

l
DWQ Pr 'ect No, 021204 DWO Project No. 021204 DWQ Project No. 021204
of BIORETENTION AND NATURAL FLOODPLAtN AREA OPERATION AND MAINTENANCE AGREEMENT to ~ FOR NORTIILAKE PILLAGE ~ 0
DIVISION OF WATER QUALITY • BIORETENTK?N AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREAWORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET U U
U
i. PROJECT INFORMATION (please complete the following irttomnation): I. PROJECT INFORMATION (please complete the following information): I. I. PROJECT INFORMATION lease c late the followi information): tivities shall be erfomted as follows: = Z (P ~P n9 Maintenance ac p
Project Name ; NORTHLAKE VILLAGE Project Name : NORTHLAKE VILLAGE Projer Project Name : NORTHLAKE VILLAGE
Contact Person: JILL OUNGER Phone Number. (7031532-6163 Contact Person: JILL OUNGER Phone Number. (7031532-6163 Conta Contact Person: JILL OLINGER Phone Number. 703 532-6163 1 Immediatef after coin lesion of Bioretention Area lantin ~ a Y P p 9 For projects with multiple basins, spec~y which basin this worksheet applies to: ~ W 1
For projects with multiple basins, specrfy which basin this worksheet applies to: 1 For projects with multiple basins, spectiy which basin this worksheet applies to: 4 For pr n f ch da for fourteen consecutive da s. ~ a. Plant material shall be watered at the e d o ea y y ~
Pem~anent Pool Elevation VARIES tt. (elevation of the orifice irnert out) ~ U o
Permanent Pool Eievalan 747.80 ft. (elevation of the orifice invert oat} Permanent Pool Elevation 770.10 ft. (elevation of the orifice irnert ouq Perm Temporary Pool Elevation 748.50 ft. (elevation of the outlet structure invert in) Temporary Pool Elevation 770.30 it (elevation of the outlet structure invert in) Temp Tem ra Pool Elevation VARIES ft, elevation of the ouflet structure invert in 2. When ever needed: N P~ ry ( ) o ~
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8ioretention Surface Area 2,536 sq. ft. 8ioretention Surface Area 2,14$ sq. ft. Biarel Biaretention Surface Area 3,842 sq. ft. a. Remulch any void areas.
Drainage Area 1.37 ac. (on-site andoff-site drainage to the basin) Drainage Area 1.16 ac. (on-site and off-site drainage to the basin) Drain Drainage Area 1.96 ac. (on-site and oft-site drainage to the basin) ~
Im rvious Area 1.17 ac. {on•site and off-site drair~ge to the basin) Imper'ous Area 0.99 ac. (on-site andoff-site drainage to the basin) Imper pe Im envious Area 1.67 ac. (on-site and off-site drainage to the basin) b. Treat elf diseased trees and shrubs, g P W Z Rational C Coefficient 0.85
Rational C Coefficient 0.85 Rational C Coefficient 0.85 Ratio Size °k 5 % either5%in wlsand underdrain or 1°k in wlo c Replace any deficient stakes or wires ( )
Size °k 5 % (either 596 in wlsand under drain or 1°k in wlo} Size 5 °!o (either 5°k in wlsand under drain or 7°,6 in wlo} Size °
~ I RETENTION AREA Inlet Veloci 5.0 fps # ACTUAL VELOGTY AT BIORETEN110N AREA Inlet 1 Inlet Veloary 4.2 ips ACTUAL VELOCTY AT B 0 ty 3. One ear after coin ?etion of Bioretention area lanti 5 Inlet Velocity ttAAX. 2.4 fps ~ ACTUAL VELOCITY AT BIORETENTION AREA Y P p ~ Q.
Inlet flow depth 0.97 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 1.04 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet f Inlet flow th 0.34 in WILL BE LESS DUE TO INLET DEFLECTOR _ ~ a. Remove stakes and wires during the sPnn9• ¦ ~ U
Depth to Ground Water 17.3 ft. AND GRASS FlLTER STRIP Depth to Ground Water 8.30 ft. AND GRASS FlLTER STRIP Depth Depth to Ground water 7.90 ft. AND GRASS FlLTER STRIP oC ~ b
Wanting Soil Infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 m.lhr. (the sal layer dawn to 4 feet) Planti Plantin Soil Infiltration Bate 1.5 inlhr. (the sal layer down to 4 feet) O ~ r o 9 = r ~
In-Situ Soil InfilVation Rate 1.00 in.ltmr. (the soil layer below 4 feet or below the sand bed} In-Situ Soil Infiltration Rate 1.02 inllmr. (the soil layer below 4 feet or below the sand bed) In-Sib In-Situ Soil InfilVation Rafe 1.00 in,lhr. (the soil layer below 4 feet or below the sand bed) 4. After every significant runoff producing rainfall event and at least monthly. U ~ N ~
a. Inspect the Bioretention and Natural Floodplain Areas for sediment accumulation, erosion, ~ ^
II. REQUIRED ITEMS CHECKLIST il. REQUIRED ITEMS CHECKLIST Ii. II. REQUIRED ITEMS CHECKLIST W g a trash accumulation, vegetated cover, overall general conditbn and repair as necessary. ~ e
Initial in the space provided to indcate the following design requirements have been met and supporting documentation is attached. if a 5. Eve three months:
Initial in the space provided to inrficate the following design requirements have treerm met and supporting documentation is attached. If a Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a Initial re uirement has not been met attach an explanation of wh . At a minimum, a complete stormwater management plan submittal includes ry q Y ~
requirement has not been met, attach an explanation of why. At a minimum, a complete stomrwater management plan submittal includes requirement has not been mret attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes requir a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet swcture details, a detailed a inspect and repair the collectionfdischarge systems (i.e, inl9lti, outfaUs, pipes, riprap, etc.) ~ to Z
a worksheet for each BMP, design calculations, plans and specif~ations showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, design calculations, plans and specifications showing alt BMPs and outlet structure details, a detailed a woi drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package wilt result in a request for drainage plan and a sully executed operation and maintenance agreement. An incomplete s~mittal package will result in a request for drain drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for ~ to maintain properfunctioning. W
additional information and will substantially delay final review and approval of the project additional information and will substantially delay final review and approval of the protect adtliti~ additional information and will substantially delay final review arid approval of the project W Q
licants Iretial licants Initials Z licants Irutial5 6, Every six months: N
No vertical sand bed is proposed No vertical sand bed is proposed _ No vertical sand bed is proposed
0 The bioretenGon area is at least 40 feet by 15 feet. 0 The biaetention area is at least 40 feet by 15 feet. 0 The INaetention area is at least 40 feet b t5 feet, a. Remove accumulated sediment and debris from the Plunge Pool and repair andlor replant 4. Y
0 Sheet lbw is 'ded at inlet. ~ 0 Sheet flow isprovided atinlet. P~ 0 Sheet flow is rowded at inlet. any down gradient erosion. P ^ g
0 Water table depth is greater than 6 feet. D Water table depth is greater than 6 feet. _ D Water table depth Is greater than 6 feet. N " in is rowded b. Remove and replace all dead and diseased vegetation consrtiered beyond treatment in the Minimum of 6 pond g p
Minimum of 6" ponding is provided. Minimum of 6" ponding is provided. n 4 s. Bioretention areas. Plants are to be replaced only from March 15 to April 30 and from a The ponded yea vnl draw down in less the day r 1 to November 30. z
The ponded area will draw down in less Phan 4 days. The ponded area will draw down in less than 4 days. _ Wanting soil infltraticn rate is greater than 0,52 iNhc Planting soil infiltration rate is greater than 0.52 inlhr. _ Plantin soil infiltration rate is greater than 0.52 iriJhr. Octobe 9
The in-situ soil infilVaGon rate is greater than 0.2 inlhc D The in•situ soil infiltration rate is greater than 0.2 inlhr. _ The in-situ soil infiltration rate is rester than 0.2 inltir. 9
A planting plan with species and densities is provided. A planting plan with species and densities is provided. A lantin Ian with s ies and densities is rovided, 7. Once a year: P 9P P~ P
Mulch layer is specified in plans, Mulch layer is specified in plans. _ Mulch layer is specified in plans, Planti soil meets minimum sail ecifications NCDENR Stomrn~ater Best Maria event a. During the spring months, add mulch as necessary.
J D Wanting sal meets minimum soil spec cations (NCDENR Stomnwater Best Management D Wanting sal meets minimum soil specifications (NCDENR Stom>water Best Management _ ~ n9 sP ( 9 Practices Manual, April 1999) ?uuuuu,iu,,,~~~
Practices Manual ril 1999 Practices Manual, April 1999) ,M ) JQ Plan details for the bioretenGon area provided. Wan details for the bioretention area provided. Plan tails for the bioretention area rovided. 8. Every two or three years;
Plan details for the inlet and outlet are provided. Wan desalts for the inlet and outlet are provided. Plan details fa the inlet and outlet are provided, a. Remove old mulch layer before applying new mulch layer. °°°°0p00°
rAn operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. _ An operation and maintenance agreement signed and notarized by the responsible party is provided. : v ° 0
• ~ ° n °°°`'c~ ~ e y~° Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains , rJ ey ~ Ze ~
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdreins beneath the planting soil are acceptable in the Piedmont and Mountains Weas I acknowledge and agree by my signature below that 1 am responsible for the performance of the seven e
maintenance procedures listed above. I agree to notify DWQ of any problems with the system a prior to any S
;~d changes to the system or responsible party. ~ °
DWQ Project No. 021204 DWQ Project No. 021204 021204 Print name; Dennzs Hecht agent for and on behalf of TRG-Charlotte L'LC ~~'pnprnmimm~t~~a~~~ DWQ Protect No.
Title' Authorized Signatory, Vice President, Legal Services 6 Partnership Administration
DIVISION OF WATER QUALITY • BIORETENTION ARF~~ WORKSHEET DIVISION OF WATER QUAUTY • BIORETENTION AREA WORKSHEET DIVISION OFWATERQUAUTY • BK)RETENTIONAREAWORKSHEET Address: 2ao E. Lon~Lak~Road, suite 300 Bloomfield bills. M:t 48304 - a
0 Phone' 248.758-68 0
I. PROJECT INFORMATION (please complete the following information): I. PROJECT INFORMATION (please complete the following information); I. I. PROJECT INFORMATION (please complete the following infomtatlon):
Project Name ; NORTHLAKE VILLAGE Project Name : NORTHLAKE VIU.AGE Proje~ Project Name : NORTHLAKE VILLAGE Signatur : ~
Contact Person: ~NLL OUNt~R Phone Number. (7031532-6163 Contact Person: JILL OUNGER Phone Number. f 1031532-6163 Conti Contact Berson: JILL OIJNGER Phone Number. i 7031532-6163 , Date: ~ For projects with multiple basins, speclty which basin this worksheet applies to:
F r r 'acts with mul ' le basins s ec which basin this worksheet a lies lo: For projects with multiple basins, specfly which basin this worksheet applies to: 5 For pi o P of tiP , P tiY pP
Permanent Pool Elevation 762.60 ft. (elevation of the orifice invert out} Permanent Pool Elevation 76210 ft. (elevation of the orifice irnert out) Perm Permanent Pod Elevation 759.60 tt. elevation of the orifice irnert out Note: The legally responsible party should not f>e a homeowners assoelatlon uMess more than 50% of the
Temporary Pool Elevation 16280 ft. (elevation o} the outlet structure invert in) Temporary Pool Elevation 76230 ft. (elevation of the outlet sweture Invert in) Term ( ) rU f subdivision teas been named the resident. Temporary Pod Elevation 759.80 ik (~eva6on of the outlet structure invert in) lots have been sokf and a resMe o the p
o f c of Public for the State of ~i th ~ a, I, 0.t eh h , a N any
8ioretention Surface Area 1,574 sq. ft, 8ioretention Surface Area 833 sq. ft, Biore Bioretention Surface Area 1,541 sq. ft.
Drama a Area 0.85 ac. (on-site and off•site dial a to the basin) Drainage Area 045 ac. (on-site and off•site drainage to the basin) Drain 9 ~9 o o hereb certif that ~ ' S~ . H e C4. i 0.73 ac. on-site and fE i th I Count of 1~ SAC rnb , d y y Dra Wage Area ( o s to drainage to a bas n) y
Impervious Area 0.12 ac. (on-site and off-site drainage to tl~ basin) Impervious Area 0.38 ac. (on•site and off-site drainage to the basin) Impel impervious Area 0.62 ac. (on-site and off-site drainage to the basin) ersonall a eared before me this K} _ day of u ~ ~ ~po3 ,and acknowledge the due Rational C Coefficient 0.85 p y pp
Rational C Coefficient 0.85 Rational C Coefficient 0.85 Ratio Size % 5 (either 5°k in wlsand under drain or l% in wlo) execution of the forgoing wet [wetland) detention basin maintenance requirements. Witness my hand and
Size 5 % (either 5% in wlsand urs~r dram or 796 in wlo) Size °h 5 % (either 5°k in wlsand under drain or 7°6 in wlo) Size o official sea(, ~
~ Inlet Veioci 4.5 f s # ACTUAL VELOCTY AT BIORETENTION AREA Inlet' InletUelocity 4.2 fps ACTUAL VELOCITY AT BIORETEN110N AREA h R Inlet Velocity 4.1 fps ~ ACTUAL VELOCITY AT BIORETENTION AREA a
Inlet flow depth 1.20 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 0,90 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet Inlet flow depth 0.79 in WILL BE LESS DUE TO INLET DEFLECTOR
Depth to Ground Wafer 12.10 ft. AND GRASS FlLTER STRIP Depth to Ground Water 8.50 ft. AND GRASS FlLTER STRIP ~Pti Depth to Ground Water 8,10 ft. AND GRASS FlLTER STRIP o Planting Soil Infiltration Rate 1.5 in.mr. (the sdl layer down to 4 feet)
Wanting Soil Infiltration Rate 1.5 in.mr. (the soil layer awn Go 4 feet) Wanting Sail Infiltration Rate 1.5 m.lhr. (she soil layer down to 4 feet) Want
In-Situ Soil Infiltration Rate 1.50 in,mr, (the soil layer below 4 feet a below the sand bed) In-Situ Soil Infiltration Rafe 1.05 in.lhr, (the soil Payer below 4 feet or below the sand bed) In-Sit In-Situ Soil Infllration Rafe 0,95 inltir. (the soil layer below 4 feet or below the sand bed)
d
II. REQUIRED ITEMS CHECKLIST II. REQUIRED ITEMS CHECKLIST Il. Il. REQUIRED ITEMS CHECKLIST Z
Initial in the space provided to indcate the following design requirements have been met and supporting documentation is attached. !f a
Initial in the space provided to indate the following design requirements have been met and srppoiiing documentation is attached, if a Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached, If a Initial requirement has rat been met attach an explanation of why. At a minimum, a complete stormwater management plan subrrfttal includes N
requirement has not been met, attach an explanation of why. At a minimum, a complete stomwvater management plan submittal includes requirement has not been met attach an explanation of why. At a rt~nimum, a complete stomnvater management plan subnultal includes requi a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, deign calculations, plans and specfications showing all BMPs and outlet sUuclure details, a detailed a wo a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed SEAL
drainage plan and a fully executed operation and maintenance agreement. An incomplete stdxrmittal package will result in a request for drainage plan and a fully executed operation and maintenance agreement, An incomplete srthmitfal package will result in a request for drain 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 additional information and vnll substantialy delay final review and approval of the protect additl additional information and will substantially delay final review and approval of the project My commission expires
licants Initials licants Initials scants Iratials KAAEII a
No vertical sand bed is proposed No vertical sand bed is proposed _ No vertical sand bed is proposed ~ Q i°
0 The bioretenGon area is at least 40 feel by 15 feet 0 The biaetenGon area is at least 40 feet by 15 feet. _ 0 The bioretenUon area is at least 40 feel b 15 feet ~ ~ end ~ o - Y Mp CamnrgbA ~ 1?f1T>'1t10i' Q ~ N
0 Sheet flow is provided at inlet ~ 0 Sheet flow is provided at inlet _ 7-Sheet flow is provided at inlet. N o 0 Water table d this rester than 6 feet. U } ~
D Water tabled this rester than 6 feet. D Water table depth is greater than 6 feet. ep 9 - eP 9 Z N c Minimum of 6' ponding is provided. ~ o: ~ N
Minimum of 6" ponding is provided. Minimum of 6" ponding is provided. _The ponded area will draw down in less than 4 days. The ponded area will draw down in less Phan 4 days. _ The nded area will draw down in less than 4 da s. ~ w ~ x ~ ~ ° x po Y 7 0~ ¢ Z Z wo
Wanting soil infiltration rate is greater than 0.52 inlhr Planting soil irtfiitration rate is greater than 0,52 inlhr. _ Plantin soil infiltration rate is greater than 0.52 inlhr.u z w ~ o g W ~Z~~ ~ ~a~M
The in•situ soil infiltration rate is greater than 0.2 iNhr. The in-situ sot! infiltration rate is greater than 0.2 inlhr. The in-situ soil infiltration rate is rester than 0.2 inlhr. ~ .•n ~i ~ ~ ~ g U a w~~ Z o~~r, W O Q I I
_A planting plan with species and densities is provided. A planting plan oath species and densities is provided. A planting plan vnth species and densities is provided, Z z J o aa°ioaio to V Mulch layer is specified in plans, ~ ~ - Z ~
Mulch layer is specified in plans. Mulch layer is specified in plans, _ Planti soil meets minimum soil specifications (NCDENR Stom~water Best Management ~ ~ n9 M V M
.1 D Planting sal meets minimum sail specifications (NCDENR Stomnwater Best Management D Planting soil meets minimum sal specifications (NCDENR Stormwater Best Management _ Practices Manual, April 1999) Practices Manual, April 1999) Practices Manual, April 1999) a ~ ~ 3 N
J Wan details fa the bioretention area provided. JQ Plan details for the bioretention area provided. _ JO Plan details for the bioretentian area provided ~ ~
Wan details for the inlet and outlet are provided. Wan details fa the inlet and outlet are provided. flan details for the inlet and out~l are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. _ Ar operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note chat underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdreins beneath the planting soil are acceptable in the Piedmont and Mountains Plea;
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021204 DWQ Project No. 021204 DWQ Pr~ect No. N ~ ~ N ~ .Z
N QQ H U o`-'
DIVISION OF WATER QUALITY • BIORETENTK)N AREA WORKSHEET DINSION OF WATER QUALITY • BIORETENTK)N AREA WORKSHEET U ~ ~ _U
x W~ x - tai
I. PROJECT INFORMATION {please complete the fallowing information): I. PROJECT INFORMATION (please complete the following information): NN ~ ~ ~~8~
Project Name : NORTNLAKE VILLAGE Project Name : NORTfiLAKE VILLAGE U oC F- ~ z ° ~ tO1~ V~ p I I 9 oio oio
Contact Person: Jlll OUNGER Phone Number (7031532-6163 Contact Person: JIU. OUNGER Phone Number. (1031532-6163 Q ~y,~ ~~MM Q Nwt1-)u") h" ZC9~~ ~ V .QILNN
For projects with multiple basins, specfly which basin this worksheet applies to: 3 for projects with multiple basins, specity which basin this worksheet applies to: - 2 o ~-pp~p~p}p-pepp~er W W o 0
Permanent Pool Elevation 767.50 ft. {elevation of the c;nfice invert out) Permanent Pool Elevation 761.60 ft. (elevation of the once irnert out) O¢NN OO~N M l~ w„tii ~ N m...~~
Temporary Pool Elevation 768.00 ft. (elevation of the cutlet structure invert in) Temporary Pool Elevation 761.80 ft. (elevation of the outlet Structure invert in)
Bioreteniion Surface Area 2,038 sq. ft, eioretention Surface Area 944 sq. fi,
Drama a Area 1.06 ac. (on•site and off•site drainage to the basin) Drainage Area 0.51 ac. (on-site and off•site drainage to the basin) g I rvious Area 0.43 ac. on•site and off-site drama a to the basin
Impervious Area 0.90 ac. (on•site and off•site drainage to the basin) ~ { 9 J
Rational C Coefficient 0.85 Rational C Coefficient 0.85
Size % 5 % (either 5% in wlsand under drain or 7% in w/o) Size % 9 % (either 5% in wlsand under drain or 7% in w!o) NMI
Inlet Velocity 5.9 fps ACTUAL VELOCTY AT BIORETENTION AREA Inlet Velocity 4.4 fps # ACTUAL VELOCITY AT BIORETENTION AREA # LU 0
Inlet flow depth 1.62 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 1.04 in WILL BE LESS DUE TO INLET DEFLECTOR Co
Depth to Ground Water 8.20 ft. AND GRASS FILTER STRIP Depth to Ground Water 8.04 ft. AND GRASS FILTER STRIP
Planting Soil Infiltration Rate 1.5 in./hr. (the soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 in./hr. (the sal layer down to 4 feet) ~ v
In-Situ Soil Infiltration Rate 1.02 inJhr. (the soil layer below 4 feet or below the sand bed) In-Situ Soil Infiltration Rate 1.05 in./hr. (the soil layer below 4 feet or below the sand bed)
W a W Z
II. REQUIRED ITEMS CHECKLIST 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 Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a mi
requirement has not been met, attach an explanation of why. At a minimum, a compele slormwater management plan submittal includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes V!
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed O ~
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for > j z
additional information and will substantially delay final review and approval of the project additional information and will substantially delay final review and approval of the project
ADr)licants Initials Applicants Initials
No vertical sand bed is proposed No vertical sand bed is proposed
0 The bioretention area is at least 40 feet by 15 feet 0 The bioretention area is at least 40 feet by 15 feet. O LLJ = ~lm
0 Sheet flow is provided at inlet. 0 Sheet flow is provided at inlet. JV Water table depth is greater than 6 feet. 0 Water table depth is greater than 6 feet. 3 ~ v Z
Minimum of 6" ponding is provided. Minimum of 6' ponding is provided. -10 'lo ponded area will draw down in less than 4 days. The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 inlhr. Planting soil infiltration rate is greater than 0.52 in/hr. Z °J U. 0
The in-situ soil infiltration rate is greater than 0.2 in/hr. 110 The in-situ soil infiltration rate is greater than 0.2 inlhr. 110 1.14 A planting plan with species and densities is provided. A planting plan with species and densities is provided. (0)
)OM
Mulch layer is specified in plans. Mulch layer is specified in plans. Planting soil meets minimum soil specifications (NCDENR Storrnwater Best Management D Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management 4C M p. a
Practices Manual, April 1999) Practices Manual, April 1999) ca IN= E5
JO Plan details for the bioretention area provided. J0 Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided. , 42 Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. 1/0 Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
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V
W
SHEET: D7FOF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030018MP3

~ ~
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ti U U
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NUMBER AND SIZE OF PLANT SPECIES: 3' , , U
A MINIMUM OF THREE SPECIES OF TREES AND THREE SPECIES OF SHRUBS SHOULD BE p ~ (CURB OPENING) p SOW PAVEMENT Y 810RETENTION AREA LIMIT Fl.OW . a
SELECTED TO INSURE DIVERSITY. HERBACEOUS GROUND COVERS ARE IMPORTANT TO i , W
PREVENT EROSION OF THE MULCH AND THE SOIL LAYERS. ~ Q
NTION AREA ARE: ~ V ° THE SIX MAJOR COMPONENTS OF THE BIORETE N
THE NUMBER OF TREE AND SHRUB PLANTINGS MAY VARY, ESPECIALLY IN AREAS WHERE ~t
AESTHETICS AND VISIBILITY ARE VITAL TO SITE DEVELOPMENT, AND SHOULD BE ` ' GRASS BUFFER STRIP Z O
DETERMINED ON AN INDIVIDUAL BASIS. ON AVERAGE, 1,000 TREES AND SHRUBS 4s B SHOULD BE PLANTED PER ACRE. TWO TO THREE SHRUBS SHOULD BE SPECIFIED FOR • ' ' ' • NG AREA N PONDI
EACH TREE (2:1 TO 3:1 RATIO OF SHRUBS TO TREES). • • • • 1.5'(MIN. PLANTING SOIL ~ N 2 - ~ _ w.... 2 ~ - - _ . - ~ SAND BED Z
PLAN LENGTH ~ ~ W . . , o ORGANIC LAYER OR MULCH z ~
AT INSTALLATION, TREES SHOULD BE 2.5 INCHES IN CALIPER, AND SHRUBS 3 TO 4 3' s•v to? ~ ao>•ror • • 0 ~ PLANT MATERIAL Z ~
FEET IN HEIGHT OR 18 TO 24 INCHES IN SPREAD. GROUND COVER MAY BE AS SEED urZ' I/2 Mrn. Rad. rrr Na. t aaNG • S • ~ p
OR PREFERABLY, PLUGS. THE RELATIVELY MATURE SIZE REQUIREMENTS FOR TREES o • ' • 0 0 ~ - ~-0 ~ -2 GRASS BUFFER STRIP 2 M
AND SHRUBS ARE IMPORTANT TO ENSURE THAT THE INSTALLATION OF PLANTS ARE ~ ~ ' ~•~it' V P ANSPIRATION wal:•o.c. ~•ataa ~ ~ V o ~ ~ s o0
READILY CONTRIBUTING TO THE BIORETENTION PROCESS (I.E., E A OTR SECTtoN p•p • ~ - • • , ' ' • THE GRASS BUFFER STRIP IS LOCATED BETWEEN THE IMPERVIOUS SURFACE AND THE ~ O ~ ,.7N • 2 MIN...... a
POLLUTANT UPTAKE). 1/~.' ~ + I~~. BIORETENTION AREA. IT FUNCTIONS TO REDUCE THE RUNOFF VELOCITY AND FILTER = i
• . ~ ~ 'i:r PARTICULATES FROM THE RUNOFF PRIOR TO DISCHARGING TO THE BIORETENTION AREA. U CUR ~ N ~ ~
l 4.6 Recommended Tra and Shrob S cin Tabe Pa 8 SECTION'8.9` ~ ~
Q O FLOW FLOW PONDING AREA ~ ~ °
Tree S is Slwb Spacing Total Density 1~ g LL
(feet feet stemslacre THE PONDING AREA OVER THE ROOT ZONE PROVIDES FOR SOME SURFACE STORAGE OF W
Maximum 19 12 400 THE STORM WATER RUNOFF AND PROVIDES FOR THE EVAPORATION OF A PORTION OF ~ ~ N Z
1000 Ave a 12 8 THE RUNOFF. SETTLING OF THE PARTICULATES THAT HAVE NOT BEEN FILTERED BY THE c~
1 1250 ~ c,~q ~ r~r GRASS BUFFER OR THE SAND BED OCCURS IN THE PONDING AREA. W Q Z ~
N ~ N
~ NOT TO SCALE ~ Z ~ a ~ ORGANIC LAYER OR MULCH ¢ W ~
0 J c~
110N AREAS MUST MEET ALL MINIMUM GUIDELINES AS SPECIFlED IN THE NCDENR BIORETEN THE ORGANIC LAYER PROVIDES A MEDIUM FOR BIOLOGICAL GROWTH AND ~ n O O ~ ~
STORMWATER BEST MANAGEMENT PRACTICES MANUAL, APRIL 1999. BIOCk10D • J.1 WATER DECOMPOSITION OF ORGANIC MATERIAL. THE ORGANIC OR MULCH LAYER ON THE _ U cv o MAX. PONDED
CONSTRUCTION ~ BIORETENTION AREAS SHALL BE IN CONFORMANCE WITH THE NORTH ISOMETRIC DEPTH 6 INCHES SURFACE OF THE SOIL HAS SEVERAL PHYSICAL AND BIOLOGICAL FUNCTIONS. THE R UND COVER OR ( ) G 0 .SURFACE LAYER ACTS AS A FILTER FOR POLLUTANTS IN THE RUNOFF AND PROTECTS
CAROLINA STORMWATER BEST MANAGEMENT PRACTICES HANDBOOK (APRIL 1999). SEE MULCH LAYER THE SOIL FROM DRYING AND ERODING AND SIMULATES THE LEAF LITTER IN A FORST
CHAPTER 4 FOR FURTHER DETAILS AND SPECIFlCATIONS. R ~ 3:1 MAX. ~ UR8 COMMUNITY. THE ORGANIC OR MULCH LAYER PROVIDES AN ENVIRONMENT FO N
T AND OTHER POLLUTANTS. ~ (TYp,) FLOW MICROORGANISMS TO DEGRADE PETROLEUM-BASED SOLVEN S
PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABIE 2.2 ABOVE (SOURCE: STORMWATER FLOW
BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDI110NS AND a~. _ 11ggpmunu «ggiqi
AVAILABILITY. N.T.S. . _ , . \\\\\1 ri,,~~ DE SAND 8E0
_ - . ROPOSED GRA _ _ - ~ _ . _ - ,00"0,000
- _ ^ - ' ' ' . - . ' . . - . ' - - ORETENTION AREA. IT PROVIDES ~ Oo e0 7 - . • - . , - ~ • - ND BED IS LOCATEC AT THE BOTTOM OF THE BI ; ~/0° o - THE SA ~ p Sq ooYN
SE 1N I RETENTION SNUB SPBCI63 4', „ Table 4.3 RECOMMENDED PLANT SPEC)FS FOR U B 0 O = . • ' _ - - - - - - - - ` - - AND AUGMENTS THE ABILITY OF a o ~ oho _ _ , , _ , . _ 4 MIN._ , , _ , , _ , , _ , , _ , . ' FOR DRAINAGE AND AERATION OF THE PLANTING SOIL, TRECEIVES. _ ~Ze~_
Spada Moratrue Regime Tolerance Motpbology Geaerd _ , _ , , _ ,PLANTING SOIL: , , _ . , _ , , _ , , ~ THE BIORETENTION AREA DRAIN THE RUNOFF I : U,a ao 0 o~ O o00~=
ehaAa~eilaea 32'0" Scienr Name IAdicatat Habigt PoAdin Salt O)U Mews hrsecta Exposure Fomr Hdght Root Naive Wildlife _ _ _ , . _ _ _ _ , . _ _ _ _ _ _ THE SAND SHALL BE FREE OF DELETERIOUS MATERIAL AND ROCKS GREATER THAN 1 ~Y o0 00
~ g s em 4'-0" CommoA Name $tadra Oreaae - ' ' - ' ' ' ' ' - ' ' - ' ' - • ' - ' " 4" PEA GRAVEL ALL BE .ASTM STD C-33 CONCRETE SAND. %~0 °0o eo°° ~ o~` ^,~t,.,,; : ~ ai ,;;x.~,,; , „ 6 1/ INCH IN DIAMETER. SAND SH 00 F
&rbuis koreano FAC Matic 2•d H H H M SAA to pafial Ovd dAUb 4;. Shepow No Low 8', 6" '1.'.t,,o,•~"~~ *.~:y.,.Y' it .Ya,\,'~~V't~,•.M i4}`•`1'~.:y<' ~~I ~1~\\\\
Shade 8erbafa daabt U PAC Maio 1.1 H H M M Sun Rormdad, S•7' Shalhnr No Med. rrrrrr411111111111111111\1111\` 0000oooooaooooo0 00000 000000 000000000 00000 000000000 0 000000 0 0 0 0000000 00
Iapamae barberry Broad deAa 000 00 00 0000
ahmb FLOW 6" PERFORATED X57 STONE ~
Clediro a la PAC Maic to 1.4 H - H Sun to partial Ovoid shrub 611' Shallow Ya Med. sweet wet mwc Shade 1 : ~ I S PLANTING SOIL o PVC PPE
Corms Srotoaifim FACW Medc = 1•ti N H H M SuA a Shade Arduug, 1419' Shallow Yes High BIORETENTION AREA THE PLANTING SOIL IS TFIE REGION WHICH PROVIDES THE SOURCE OF WATER AND
tedoakrdo S FIOVy Euoxynuu sbrw FAC Mak I.2 H H H M SAn or shade Plat, chose, 5•? Shallow No No NUTRIENTS FOR THE PLANTS TO SUSTAIN GROWTH. THE VOIDS IN THE SOIL ALSO
horirsrnw INLET DEFLECTOR PROVIDE FOR STORMWATER STORAGE. CLAY PARI1CLES THAT COMPOSE A PORTION OF
• (SEE DETAIL THIS Eaorq+aaseu?opaeres FAC Mesic 1-2 M M M M SAntopartul Up•rrghtdeme Ia12' Shdlow No No SHEET) - THE SOIL ADSORB HEADY METALS, NUTRIENTS, HYDROCARBONS, AND OTHER
rb.de and sbaab NOT TO SCALE POLLUTANTS.
Namamttis vlrgiaia FAC Mesic 1.4 M M M M SAA a Shad Veae•tfke 4.6' Shallow Ya Low
wttdt•hasd NyPnkuardtns{lioraar FAC Maic 2.4 H M M H Sun OvoidSt~Ab 3.6' Shallow Ya Mad PLANT MATERIAL
. oomnson St. John's wort ~ THE RQLE OF PLANT SPECIES IN THE BIORETENTION CONCEPT IS TO USE NUTRIENTS AND
Z•4 L M H Santo S 611' Shallow Ya High AND GUTTER PACW Marc ~ STANDARD CURB ~ MODIFIED 8 asi Maio ~ sbNb N.T.S. OTHER POLLUTANTS AND TO REMOVE WATER THROUGH EVAPOTRANSPIRATION. A
1tet veticiftait PACW Meaic to 1.4 L M H sun to partial Spreading 611' Shalhsw Ya High NOT TO SCALE FOREST COMMUNITY STRUCTURE IS REPLICATED TO AVOID MONOCULTURE SUSCEPTIBILITY
wit Meaic sun Juaiperus coauaurrit FAC [ky Maic 1-2 M H H M•H Sun Motmded b 3.6' Deep No High TO INSECT AND DISEASE INFESTATION AND TO CREATE A MICROCLIMATE WHICH IS
wMes;D ' NOTE: THIS CURB AND GUTTER SYSTEM IS TO BE I RESISTANT TO THE STRESSES TO WHICH LANDSCAPED AREAS IN URBAN AREAS ARE Z SUBJECTED, INCLUDING HEAT AND DRYING WINDS. °
cnmaan' M . H H M•N Snn Maned a3' Dap No High USED IN THE BIO-RETENTION AREAS ONLY a
]unipcrushoritortwlJs FAC Dry Marc i•2 "liar Harbor" to Mesic U !n W
°
tJndero i)anroia FACW Mede to 1~ N H Sun Upright 6l2' Dap Ya High wa Medc
Myricro peru?syl?nalaa FAC Medc 2.4 H M M H Sun to pardd R 68' Shallow Ya High GENERAL GUIDELINES
~ amm MINIMUM SIZE: Z
I
THE FOLLOWING DIMENSIONS ARE RECOMMENDED FOR BIORETENTION AREAS:
daub
sae w lira FAC Dry Maic 1.4 M H Sun Uprigia dwb 611' Shallow Yes Med ~Y rP I to wet ainebark - T NAL BIORETENTION AREA SHOULD BE 15 FEET. ~ AVERAGE WIDTH OF A FUNC 10
Medc A WIDTH OF 25 FEET IS PREFERABLE. g
Viburnwrt irwidcs FACW Maio 2-d H H H H Sun to panda Raun~d, 68' Shallow Ya High cars nordrem wild raisin ~ snn coAgacted U - AVERAGE LENGTH SHOULD BE 40 FEET. FOR WIDTHS EQUAL OR GREATER p _
drub THAN 20 FEET THE LENGTH OF THE BIORETENTION AREA SHOULD BE AT ~
Vlburnuar dcAwmm FAC Mesic 2.4 H H H H Sus to partid Upright, mr~i• &10' Shallow Yes High LEAST TWICE THE WIDTH. Q M ao 0
arrow-wood amr stemmed ahaub Vtbanrunrltrua o FAC Mesic 2.4 H H H H Suntopartia Uptight,muhi• 8-IO' Shdllow Ya High B Q n o N
Aamr am aterAmal drub -THE PONDED AREA SHOULD HAVE A MAXIMUM DEPTH OF 6 INCHES. U O Z w ~
- U ~ ~N ~ THE PLANTING SOIL SHOULD HAVE A MINIMUM DEPTH OF 4 FEET. (yJ
F~ W~ X ~ ~aO0 X
Table 4.4 RECOMMENDED PLANT SPECIES FOR USE IN 9IORETENTION - TREE SPBCIES g MAluu~ Tolerance Morphology Genera} N ~~zw 14~ Z~w°° ~ BIORETENTION AREAS WILL BE LIMITED TO DRAINAGE AREAS LESS THA a ~a~M
f3ruacteristics 5 ACRES IN SIZE. W ~ ~Z ~ ~ ~ V W acwa~~ Z Z~N~ pal Z QZ I I p~ I I
Habitat Pondi Snit OiU Mews lASats Exposwe Form Height Root Native Wildlife s<~a Name Ag ON #1 ~ BI 111 NN I OF THE BIORETENTION AREAS SHOULD BE 5% WITH SAND BED TO 7% ~a ~ ~ v ~ THE SZE ( ) - Z . M
Common Name Status Gteaae S RATIONAL "C" ~ W ° tO ~ ~ ~ 00 °0 (WITHOUT SAND BED) OF THE DRAINAGE AREA MULTIPLIED BY THE II~,..II
PAC Matic • 4.6 H H N H Puna Sao Single to multi- Sa70' Shallow Yes High Accr rAbrua red le. H stemtra ~ ~~MM ~ V O>MM COEFFICIENT. ~,Q~n 3 Nw~,°,,
Ametanelrieroanadensis FAC Mesic 2.4 H M H Partial Sun Single to multi• 3a50' Shdbw Ya High
stem tra 7
&Arla nisra PACW Mesic to 4.6 M M H Partial Srm SiAgk to mulCr Sa15' Shdbw Ya Mad dyer bitch H alas tea ~
Bran l tie FAC Xeric• 4•b H H M H Partid Sun Single to Aal6• 35.50' Shalow Ya High ~ ~ stem Ace to ~
birds H c (~----D Fraxtrws amaricaao FAC Mesic 2.4 M H H H Swr loge tta Sa80' Dap Ya Low
whin mh ~----~--•O o J o °
Pattie! Sun tra 40.65' Shallow Yea Low ~ FrasinrraPeaasyfvanica FACW Maic 46 M H H H Large ash to ;~~r o o
~ O . S0.g0' Shallow Na Low Q"-~ o bAoba FAC Marc 1~ H H H H Sum Large tra - ' ~;g~ . ~ ro -••~--r ~ ~ IU ~ M t~ ~3--. v oM0
Maidea4arr • M M SuA SmaO SaTT Shallow Yess Law FAC Marc 2.4 H lJ1l-U r f~ ."a ~ _
Cladisuatriacmrthos 1 ;>'a r,, ~ ~ r i ~ loge tra to deep ~ , ~ x f lane st t ~ ~~r~a w ~ ~r ~ . ~ ~ ~ -ter s =z1 ~ ~ ~ ° C~
U U l~ ~a c"^~'' , Ya Y s~ 4 . 'f+ ~ i. i a t ; - U -
Juaiperuavirgiarana FACU Mesic- 2.4 H H H Srm DeAaesingle 3aT5' Taproot ery x eastern led ands Xeric stem iroe t. tr Y y, .:F h ~'~';5 t~ J vTia~ to Q Q ~
H H H Sim Round, dau 20.3()' Shdbw No No ~ Koelrcuuda panicaJare FACU Mesic 2-4 H + I ~i1JOB JOO ~+2~0 ZJpp~
shade tree deatain tree Sun tra Sa70' Yea Hi 4.6 H H H M Large Deep 8h I x _ U O~ L~ °Zt01~ ~h-~ZO I°~ ~~'~v I I
Llquldaarbar sryrac{~ua FAC Mes?c awatbum a VW 0 I- rli ,r,1 La N w ~ ~
10' Shallow Yes ~ Nyssa tylvarica FACW Maio • 4.6 H H H H Sun loge tree is High ~ Y ~ , . _ O OO ~iv~ W W ~.v~ cr Zopop oppp
black gum Hydtic ~ w ~ • ,x ~Mx,;... x O.. OrdNN ~~NN
- Sun a tra 7x30' Shallow No Taw N M ' 1.4 H M Lang IQ Plaranusanrfolur PACW arc O d '
London lane-ba i< r Mesic • 4fi M M M M Sun Large tra 7x80' 5hatlow Ya Mtd Plateaus acridtnralis FACW w ~ + . , ^ ~
ro H dnc 2•,: eS , .nc.f
Po alas delrotdes FAC Xetic • 4.6 H H H L Sun tm with TS- 5he8ow Ya Hi r .~5}" ~ ,°y ~L
o
eastern cottonwood Mesic spreading 100' D p i .ate + a~n °~~'~D LY J
branches
FAC Mesic 2.4 H H H H Sun Dense shade 3040' Shallow No Low 0 E 4 Pyres caJi<r}nAa nee to da 0
Quer:us bicold FACW Mesic to 4-6 H H H Sun to partial Large tree 75• Shallow Yes Hugh
a white oak wet Maio San 100 tree 30.75' Shallow Yes Qaerew coccinea FAC Mesic 12 H M M M Sus Large High ,
scarletoak to
rrw ~ FAC Mesic to 2.4 H H H M Sun Large 75• Taproot No High
~ . bur oat wet Mealc spreading tee 100' Qrercas pabarria FACW Mesic• 4.6 H H H M Sun IMF tree 60.60' Shallow Yes High v
Pain oak Hydric to deep
~ a J ~ ~
Quer s phellar FACW Mesic to 4.6 H - H Sun Large tree 55.75' Shallow Yes High willow oak wet Mesic I . . I --j m,s rubra PAC Mesic 2.4 M H M M Sun to partial Large 60 W Deep Yes High
0 0
not tree
Table 4.5 RECOMMENDED PLANT SPECIES FOR USE IN BIORETENTION HERBACEOUS GROUND COVER Specks ~ W Im
7 Moisture Regime 1 7 Tolerance Motphtolou General BIOR A Characteristics
Scie d Namr Indicator Habitat Ponding Salt Oil/ Metals Insects Exposure Form Height Root Native Wildlife a W ~ ~
Common Name Stams Grew S Agrosrisalba PAC Mesic- 1.2 H H H Shade Grass 2.3' Fibaau Yes High
MA-M Xeric Shallow C
Andropogan gerardl FAC Dry Mesic 1.2 Sun Gn m 2.3' Fiberous Yes High bl • Mesic Shallow
Descbanw1a caespaosa FACW Maw to 24 H H H Sun Grass 2.3' Fberous Yes med.
totted hairxrass wet Mesic Shallow o J ° v
Hedera Hells FACU Mesic 1-2 H San Evergraund Fiberoas No Low Floglish, 1 cover Shallow
Low Cornkalatus FAC Mesic • 1.2 H L H H Sun Gass 2-3' Fibetoos Yes High H- Z ~ cs
birdsfoot•trefoil Xeric Shallow Pachysandraremunalu FACU Mesic 1-2 M Shade Evergreen Fiberota No Low
Japanese sandria around cover Shallow
Pankum veretum FAC to Mesic 24 H - H Sun or. Shade Grass 4.5' Fiberoaa Yes High
switch grass FACU Shallow Parrhenocisrus FACU Mesic 1.2 - H Shade Evergreen - Fibemus No LAW 1~ ~ z
Triaupida gromdCover Shallow ~i
Boston I Wnca major FACU Mesic 1.2 H Shade Evergreen - Fiberous No Low ~ O
lante winkle weer . Shallow
Vbnca mbeor FACU Maic 1.2 H Shade Evergreen Fiberoas No Low common winkle oova Shallow o Z
0
OVERALI =RACE AREA MAP O° ui
SCALI SCALE: 1"=200'
SHEET: D8 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030016MP2 XREF: DRAINAGE PLAN STATE/03001BASE

N ~
H ~
U U
BIORETENTION SIZING COMPUTATIONS U = z
DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) U -
YARD INLET THROAT = 746.50 =SIZE OF BIORETENTION AREA Y
FOR EMERGENCY OVERFLOW . a W
1.37 AC * 0.85 * 0.05 = 0.058 AC. = 2,536 SF n. ~ Q a
W `Y ~ U o
y y D
y z o N
y N
y - y ~ ~
/ y y Z
y BIORETENTION PLANTING COVER COMPUTATIONS Z
BIORETENTION AREA #1 = 2,536 SF = 0.058 AC. $ 4 WIDE OPENING PLANTING REQUIREMENT = 1 000 PLANTINGS AC, 5
4y ~ / IN CURB (TYP.) y y TOTAL PLANTINGS REQUIRED = 58 PLANTINGS
y TOTAL PLANTINGS PROVIDED = 58 SHRUBS /TREES ~Uso
y MN 0 ~ r O
y '1' M \00
y l' U h tr ~ ~
,y Y y ~ ~
y ~ ~0 y y O y y y y y 3" OF 12 MONTHS AGED MULCH ~ p a oQv°
y i / 6 PONDED P Z u.
y J I~ WATER DEPTH PROP. CURB y w
0 y - - _ ~ p~nz
y = TOP EL.=747.80 - I I - ~ ~ w ~
49. - 1 1 = ~ {--r i d 2y ~ I_II F BOTTOM EL.=747.30 ' ~T_I-II _ ' I___ 3:1 SLOPE ® a'' w Q z ~a
y y I I-i ~ . - _ ~ I 0 ~-1 ~ ~ ~ N a--~-a p C~ oc
y y - ~ r r: _ - _ ..4 MIN.--_~_.__-_ 1= P-+-d _ z a
y y y r i I-1 rIII ~ _--PLANTING SOIL--~• -.'III{ W W _ _ _ ! ~ W f ^ M
y _II I III. F a~n i? Q n s~
ICI .;;,w,;.; - , - , - ' 1I1= 6" 1 4" PEA GRAVEL N v =
- ;,':~r°";3,'-1 MIN. SAND BED`<~'';':'~:.;, y (USE ASTM C-33 - .A..,~°;:;,,'~ .r,,,tw,. I .-r p-.,._.4
y y CONC. SAND - - - Q ~ ~ ~ ~ w
47.80 y y o °o°o°o°o°o°o Q
y 0 0 0 0 0 0 O N B -747.30 y y ~
y w ~ ~ n 4•g y50 14.0 AVG. 6 PERFORATED
y y #57 STONE PVC PIPE (SEE PLAN uiunuui°ru~n~
y y y 28.0 AVG. VIEW FOR INVERTS) % ~~`~at ryr~~~~i
y y y y y y y SECTION A-A ~J~~ eoe00 ~ ~~~ii 0000 444
y y `I' y v0 ~1 °e~ D00 ~ °o In
y y y y N.T.S. ~ ey n ~Z°7°_
y y 'y y y y y e - e0u N 0
y y y y y y°o ° o°~ Y ~d. 0 4/:
y y y y y Q o p0e0 ~ ~o
y y 6" PONDED y ~ y y WATER DEPTH 3" OF 12 MONTHS AGED MULCH
y y W.) y I ~~~h! M~t~~` nrnnuwiumtt
y y y l l-- y y y ~ TOP EL,=747.80 - I„I1=1~
y y y y 0 _I - II-
y y `1' , ~I I f_ _ _ _ - _ _ I L ,y ,y y y y BOTTOM EL.=747.30 {I~fI _ _ _''I- 3:1 SLOPE SCALE: 1 "=500' c
y y y y - - ~ - - - -III { - ':4 MIN.--::~::-_-_' -llk
y y y y ~ ~ I PL_ANTIN_G SOIL- • _ y y 'Y ~-I i _ _ _ • I~ I I
_II i, _ _ III
r.'y. ~ p. • •"H SMI~j I' 6" 1/4" PEA GRAVEL
i:~ti:.~h:1 MIN. SAND BED' ~ { '>,.,,;.;:.,n;,. ;M,~,,: ,.`.•,w,•." MIN. 9
89.0' 6" PERFORATED
PVC PIPE #57 STONE
z 0
SECTION B-B r= n.
SCALE: 1 "=10' N.T.S. c°~3
w °
BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURAl10N
SCALE: AS SHOWN
0 z
I
y Q
y y y y
y y y y YAR INLET THROAT = 762
Fri ERGENCY OVERFLOW `Y y y ~ BIORETENTION SIZING COMPUTATIONS BIORETENTION SIZING COMPUTATIONS Q M 00 0
y y y ~ s °
y y y DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) y y y y A ~ C-FACTOR ~ 5% WITH SAND BED N o DRAINAGE AREA ( ) U } ~M
=SIZE OF BIORETENTION AREA y =SIZE OF BIORETENTION AREA Z ~ ~ No ~ N
y y y y ~ ~ 0. 5 = 0.045 AC. = 1 962 SF - W ~ X ~ ~ ~ X 1.06 AC 0.85 0 a
y y 0.85 AC * 0.85 * 0.05 = 0.036 AC. = 1,574 SF y y ' ~~zw ~ Z~wo ~ W ~`'z00ao ~ ~<cor7
y ~d _~u, ~i a4,oo~ Z oco~n U W V, ZJNh
y y y az ~ ~ oo i ~ 00000 U_ NN
y y W `Y V7 WO~thO ~ ~W~WOMOOMO
y ~ ~~MM ~ V O>MM ~Qhh 3 NWOM
y y y y BIORETENTION PLANTING COVER COMPUTATIONS ~ ww y =
y y y BIORETENTION PLANTING COVER COMPUTAl10NS y y y 4' WIDE OPENING BIORETENTION AREA #3 = 2,038 SF = 0.047 AC.
y y y 6 IN URB (TYP.) BIORETENTION AREA #2 = 1,574 SF = 0.036 AC. y y PLANTING REQUIREMENT = 1,000 PLANTINGS/AC.
y y y CENTERED PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. y ON NT STRIPE TOTAL PLANTINGS REQUIRED = 36 PLANTINGS ~V y ~Y y y TOTAL PLANTINGS REQUIRED = 47 PLANTINGS
y W y y TOTAL PLANTINGS PROVIDED = 47 SHRUBS /TREES
y y TOTAL PLANTINGS PROVIDED = 36 SHRUBS /TREES y O O
W `I' y y y y O ~ O
WW M y F-M
a w y y y ~ Nd~• U1~ .Z ~ ~ Z
y y Q I7 ~ S ~ O ~ O
y y y y ~ „ 3 OF 12 MONTHS AGED MULCH _ ~ U ~ _
y y y y 3" OF 12 MONTHS AGED MULCH y y y 6 PONDED d 4 WIDE OPENING 6 PONDED U Z~ w ~ X 6 IN CURB (TYP.) WATER DEPTH /PROP. CURB ~ w Q a ~ Q
y o y WATER DEPTH PROP, CURB O / cn ~ LL. J uj ~ y y ~J~cO C7 JOO
y y y f o - TOP EL.=767.50 U = ~ ~ m Z=°~
~ y TOP EL=762,60 _ y ® y y - - = II(I~ - ( I V ~p~ i ~ Jaoao - - ' I I - - - - - _ _ - _ - Q o I- h Q i-- W y ~ y BOTTOM EL.-767.00 ~ _ - _ = _ - _ - - ~ ~I I 3:1 SLOPE k' z ~ ~ ~ ~ Q C-i N N
,y y y y - ~I I - _ _ _ _ _ _ _ = I I, W BOTTOM EL,-762.10 I I_L , r~ - _ ~ _ ~ I I-' 3:1 SLOPE
-,i - ~Q~N ~'-~NN
y y a. y y -III " ~ _ =,,II_T y (r o y ~.~_:4 MIN.'-,~::-_.__'. 11~ PLANTING SOIL '
o ,~~I ~~-:_-PLANTING SOIL- i~I II~I~
y y V y -III- _ _ _ - 14 y y ® y 6 i-III -,'II_~{ I ~ ,try": ~ w r ~ ~ . r 4r„ } vry! ~ 1~ „ N u =1 ,•r., 6 1/4 PEA GRA EL
y y o ~ y y ' I ICI ' _ ~ ; ~ - _ ~ 11 1~ Q ~_'^r3'{Y.1~ 111\1 [~A All1 I']CI~:.:iP~:"'.:' Q ; 1 MIN. SAND BED 4,'''" y USE ASTM C-33 ,,,4,~ I • ~ 1 Z
~ - =III , , . . ; , • • •.r.,;~•,tm°: I ~r-6 1/4 PEA GRAVEL
4 W \ (USE ASTM C-36 r,~;:I muv On{vu DCU,!; i _ JAIVU YARD INLET THROAT = 768.00 1w4u
W y Q~ SAND) CONC. W W O W 0 o0 o°°°° 0 0 0 0 0 0 W y FOR EMERGENCY OVERFLOW ° 0 0 0° o° o° 0° o°' o N J
0 0 00 O N 0 0 0-0-0-0- 4 R
y W ,~G O W 18.0' 6" PERFORATED z Lu W
6.0' " W W a ~ W 6 PERFORATED #57 STONE PVC PIPE (SEE PLAN
y ; o y #57 STONE PVC PIPE (SEE PLAN co 31.0 VIEW FOR INVERTS)
BIORETENTION #2 15.0 AVG. VIEW FOR INVERTS y W TOP=762.60 TTOP=767.5 SECTION E-E
OM=7 .00 W
y W W W BOTTOM-762.10 SECTION C -C N.T.S. 4c =J W
\ W o. W N.T.S. W W ; y W W
W ~10
W W W W W 6" PONDED
y W y 6" PONDED 6 WATER DEPTH 3 OF 12 MONTHS AGED MULCH CL > J
y W W ` WATER DEPTH 3" OF 12 MONTHS AGED MULCH
y W W y y W _
,y y -II III +I W TOP EL.=767.50 -III -
6 P EL.=762.60 _ I- I IT-1 I TO W W III-{ I L ~ - I I-I I I_I W W X - UJ B OTTOM EL.-767.00 3:1 SLOPE Z
y _I II - - _ _ = III BOTTOM EL.-762.10 3:1 SLOPE II-I_LI - - - - - -
Z
W W = =(II~II .4' MIN. 1=1I PLANTING SOIL_-..
W W W I I-I _ : r I I-I 11- PLANTING _7 7. X11=1 - I LL.
y y _Iirl. _ _ - - - - - III_Ii ~ " 6 1/4 PEA GRAVEL
6 1/4" PEA GRAVEL MIN SAND BED`,r'W ' _I •;;;1 . ,y,;n,oyw;a 'lflyl'i.l.' +•\'I C1~.'1iA.MIN. 9"
MIN. SAND BED, y y .t. MIN. 9"
W y W - I
y W \ W W
y W W 66.0' 6" PERFORATED ui FJ
115.0' 6" PERFORATED #57 STONE PVC PIPE IN=
y W W PVC PIPE W #57 STONE m SECTION F-F uJ o Z
Y Y SECTION D-D N.T.S.
W W W W W W W W N.T.J. W
W W W J
BIORETENT ION FILTER DRAINAGE SYSTEM CONFIGUM110N BIORETENTION #3 BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN
SCALE: 1"=10' W
BIORETENTION #2 SCALE: AS SHOWN
SCALE: 1"=10'
SHEET: D9 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE

N ~
~ 0
U, U
BIORETENTION SIZING COMPUTA110NS = Z
U -
* - OR * 5% WITH SAND BED ~ DRAINAGE AREA A C FACT ( ) Y
=SIZE OF BIORETENTION AREA a W
1.16 AC*0.85*0.05=0.049 AC.=2,148 SF a ~ U o
~ ~ ~--i ~ co
~ ~
u N
P---F~ N
TING COYER COMPUTATIONS o-~ r• BIORETENTION PLAN v~ g
y W _ _ . 49 AC. Z B10RETENTION AREA #4 2,148 SF 0 0
W W W - AC. ~ PLANTING REQUIREMENT - 1,000 PLANTINGS/
W 'i' y J~ W TOTAL PLANTINGS REQUIRED = 49 PLANTINGS a 5
~Y W TOTAL PLANTINGS PROVIDED = 49 SHRUBS /TREES Is-~ p_ 0 ~b Mo
y, W W W ?`'`o ¦ N 5
W 9 0 ~ ~ o~ I ~
5 7- W W
W ~ ~ rr n
W „ ~ a
® W 3 OF 12 MONTHS AGED MULCH o 6 PONDED tl. ~
W /(u W 4 ~ WATER DEPTH PROP. CURB
W 4 WIDE OPENING f W
W 7 IN CURB (TYP.) W _ EL.=770.10 ~ u' _ - TOP I I D ~ Z
W BOTTOM EL.=769.60 11=1 I I , - _ _ ~ _ ~ _ ~ - ~ T ~ - 1- 3:1 SLOPE W Q
y, ~ W - - - _ - _ - - - III Z ~ 71N - - -
W V y y ~ "___-_:4 MIN.:-,~~_-_-~ - ~ N 11.1 ~ - _ 1- 0 z
W W O - PLANTING SOIL'- ~ - _ ~ Q f I - - - _ _ - .I I~71 w n.
W _III - III- ~ _III ~ n 8
W W W O W ilk _ ~','~':~1~:=~~,-. ~r 4» PEA GRAVEL 0 ~
W W C_33 = ~:~;:,.~1 MIN; SAND BED~s,;;.~~'' I SCALE: 1 =500 ~ (USE ASTM '.,"W~~.~'. :,,:h.... N
y ~V W BIORETENTION ~4 4 W CONC. SAND) _ - - a
y TOP=770.10 o °o°o°o°o°o°o o N ~ a
W a W BOTTOM=769.60 0 0 0 0 0 0
y y W » 18 6 PERFORATED
W W 57 STONE PVC PIPE (SEE PLAN
W y, W 29.0 AVG. VIEW FOR INVERTS) 111111111Illllllllly
W W ~J~~ a°oo° ~
W W SEC110N G-G ~
W N.T.S. 3 ~v o° th °e ~ e i ~ ee
W W y s ~°y :D - U ;N ono N _e ~
~Y W - a au~ ~
W W
W W 6 PONDED MONTHS AGED MULCH WATER DEPTH J
y y W unnnalnu~"`~a~
W W x7 y W
y TOP EL.=770.10 1 ~
J, `Y W _ II- _ ~ BOTTOM EL=769.60 - I I=~' - _ _ - _ _ _ - _ _ _ - 3:1 SLOPE o
W y W W W W W -111 _ = -
W W W W y W W =11 Ilk _ - - -.;4 MIN._-::__-=--.111
W 'Y W W W 'Y y' y y W `Y ~Y J' ~Y ~Y `Y ,1~=f TING SOIL-='•~ =III - PLAN • - . _ : - ~ _ : TI
J' W W ~Y W 'Y III-i : . _ I i_L - _ = f'
W y y y .y y J W ~ _ _ _ - _ ~I' 4„ PEA GRAVEL
W W `Y AND 9E0~~~;` ~ 1 MIN. S .w.' » 4 .fi.oy~.h'•V '"1n ~l•' 9y MIN. 9
YARD INLET THROAT = 770.30
FOR EMERGENCY OVERFLOW i
6" PERFORATED 70.0 PVC PIPE
#57 STONE
SEC110N H-H
N.T.S. a
N AGE SYSTEM CONFIGURATION o
BIORETENTION FILTER DRAIN
SCALE: 1 "=10' SCALE: AS SHOWN
0 z
ONS Q BIORETENTION SIZING COMPUTATI a BIORETENTION SIZING COMPUTATIONS Q s N
* -ACTOR * 5% WITH SAND BED N o DRAINAGE AREA A C F ( ) DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) Z w ~M
=SIZE OF BIORETENTION AREA ~ ~ ~N =SIZE OF BIORETENTION AREA k w~ x ~ x
* = 0.51 AC ~ 0.85 * 0.05 = 0.022 AC. = 944 SF -j o 3 ~ Z Z W o ~
AC * 0.85 0.05 = 0.019 AC. 833 SF ~ z W ~ o 0.45 zooms a ~a~r~ W ~ ~ ~
U w a~~~ Z ~°N~ az I i oo I ~
Qo000 U U .MM
Vl ~o<nc~ ~ =~a0a~ ~ ~F-MM V OZMM
I COMPUTATIONS ,n a"^ 3 ~ W° M BIORETENTION PANTING COVER ^Ww N ^ow
BIORETENTION PLANTING COVER COMPUTATIONS BIORETENTION AREA #6 = 944 SF = 0.022 AC.
BIORETENTION AREA #5 = 833 SF = 0.019 AC. MENT = 1 000 PLANTINGS AC. PLANTING REQUIRE /
PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. - PLANTINGS TOTAL PLANTINGS REQUIRED - 22
YARD INLET THROAT = 76230 TOTAL PLANTINGS REQUIRED = 19 PLANTINGS PROVIDED = 22 SHRUBS TREES TOTAL PLANTINGS /
W FOR EMERGENCY OVERFLOW W y E TOTAL PLANTINGS PROVIDED = 19 SHRUBS /TREES
W o °
W W y TOP=76.10 ~ M mod' ~M
W W W BOTTO -761.60 ~Y ~Y W ~Y ~Y N~' a ~d~'
W W c~c ` Q Q
y W y y y 4' WIDE ENING
W W W W `Y ~V W ~V W ~Y W W W IN CUR ( " LCH H _ ~ V ~ _ „ » 3 OF 12 MONTHS AGED MU z - w ~ 3 OF 12 MONTHS AGED MULCH 6 PONDED
W W y W W y W W 0 BE CENTER D DED URB ~ ~ a ¢ ~ ~ 6 PON WATER DEPTH PROP. C PROP. CURB N ~ J o
W W W W W y W 0 VEMENT STRi E W - W J' W y' W W W y W WATER DEPTH f = o ~ o~ o f V ~=o,_°~ m z=~~
W W `Y W W ~Y `Y W - _ TOP EL.=761.60 ~ I - _ p~ ~ z o ~ ~ ~ ~ o TOP EL.-762.10 _ 1=1 _ ~ v ~ o r Q ~ ~ ~
y W y y W y y I Q o~rr,~ ~ ~ Nw,n~n = I=1_ = - ~II~_~ - = =111= : u z - - l--I I ~ ~ BOTTOM EL.=761.10 - _ _ _ _ _ - - - I 3:1 SLOPE z ~ ~ Q N N _ - <-{l. ICI - - - - - - W~.~
W W W W W W W W W W 4' WID OPENING ~ W W W W W TOP= 61 BOTTOM EL.-761.60 - - _ - - = - = I- :1 SLOPE _ - . - . _ - o W o I~III - _ . 3 .1 - . _ -III_ ~ o~ oo°~'~ - 1=! - - III _ _ - ~ _ - =•~I=L ~ ~a~~ o~NN
W IN CUB (TYP.) W J~ ^ I - - III - - ~d o Nmw =11 = - - ,1=1, !:4 MIN'-____:',__ IG
W L TO BE CENTERED BOTT 1.10 W W W y y y W ON PA MENT STRI E 6 .II-I ' = - - - = 1= _,.PLANTING SOILS _ 1 - - -PLANTING SOIL'-___-,' ~~II = _ _
\ W y W W ~ - - _ - - _ = 1 ~ -1111;-_- - _ III=1 = ~ = III ~ Hil .a
W W W 62 W W W W ~ y W ~Y ~Y ~Y W `Y ~-11 .-_----'11=1 iii. = II1- - - _ ~ , , ,:•:,,,~.m;; ' 6" 1 4» PEA GRAVEL If=1 . U,• ~~~,~;r~;'~ 6 1/4 PEA GRAVEL - SAND BED. °~>'II~
W ~Y W W /1 A y W W W W y' W W :II-' C-33 ;;;;;~K;'.-1 MIN. - °•;~r,:, • , (USE ASTM - n~„~~~., • :1 MIN. SAND BED;;:,;:'"`~~'
FUSE ASTM C-33 ~..:-,.~.r.,_'.:.....w,~:;.•. I i -
W W W y ` j`-"~~w.wd.V- I,VIVV JAIYU~ CONC. SAND) -
W W W W ® „ F Al DC W W W y 0 0 0 0 0 0
W W W W °0 0000000000 x o 0°0°°°°°o°o° o cv 000000o o o N
W W W W y y W W ;r 0 5.0 6 PERFORATED
y y W W ® .5 57 STONE 6.0 6PVC PIPE (SEE PERFORATED PLAN z LLI 0 PVC PIPE SEE PLAN # 57 STONE, ( 10.0 AVG VIEW FOR INVERTS) 15.0 AVG. VIEW FOR INVERTS _
W W W '!W W W W W .
W y W W W W
W W W W ~ W W W SECTION K-K SECTION I-I
W W y W W W W 1 --k W W W W W W W W W W W N.T.S. 44 j LIJ N.T.S.
W W W W W W W W W W W W W W
y y y W W W W W W W W
W W W W W W 6 PONDED 12 MONTHS AGED MULCH J
6 PONDED 3 OF 12 MONTHS AGED MULCH WATER DEPTH 3 OF
WATER DEPTH
TOP EL.=761.60 - TOP EL.=762.10 - - - 11 1 1.1 I -II<TIP T
YARD INLET THROAT = 761.80 FOR EMERGENCY OVERFLOW I-LLIF-I 11- ui XBOTTOM EL.=761.10 31 SL
BOTTOM EL.=761 60 3:1 SLOPE - - _ - - _ - _ - _ = .I
_MIN. I-- _ - 4 MIN.:- - T~
_ {IH _..._.,PLANTING SOIL- - PLANTING S01L
» 6 1/4 PEA GRAVEL ~
6 1/4" PEA GRAVEL ~k MIN. SAND BED -111, "'.~.~~~~i 1.1 1 ,,r•r,tf na r „ MIN MIN. SAND BED;
BIORETENTION #5 + #6
SCALE: 1"=10'
n-n t:.. v IN. 9 6" PERFORATED
„ 60.0 83.0' 6 PERFORATED PVC PIPE
PVC PIPE In=
#57 STONE
SECTION J-J #57 STONE SECTION L_L LU o Z N.T.S. u
N.T.S. J
BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION 0 z BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION
SCALE: AS SHOWN SCALE: AS SHOWN
W
2
SHEET: D10DF D20
Fife No. NC Tax Ma Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE P No. Job No. 03-001

i
YARD INLET THROAT = 752.80 N ~
f' 0 FOR~MERGENCY OVERFLOW U U
U
~ P = z U -
1 ~ i / ~ ( / / mss' ~ ~ ~ / l J ~ ~ 1 l~,~ ~
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TOP=752.60 ® 9 ¦ ~ U s BOTTOM=152.10 Q~ ~ ~ M Ih N
Q 0 ' ~ a0
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IN CURB TYP.) CSC`
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D 0 N Z 0 TOP=754.80
v f ~ / ~ l I I ~~o \ ~ I \ ~ ~V1 5 BOTTOM=754.30 Q
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SCALE: 1 "=500' f~ 8
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0 p °e J. e °
1 ~ \I TOP= 70 =Va ~ N-°~=
/ J ~ 6~ BOTT011~,"t~58.20 °W N ° y y ~ o°v~ O o h s
/ 1 y e° ° 4 WI OPENING y ,•°t~~'
IN CUR TYP. ~ o``° ~
TO BE CE RED y naaa
J , 'I$ \ ~ 1 ~9~ Biat~naa s~ ~ ON PAVEME STRI~`~ y y y y
~ \ \ \ ~ oleo ai°=is°o.io ~ / - _ ~ ~ y y
y y D
y y \ y y y
W y W y
/ \ \ \ sZ~ -CO YARD 1 THROAT 780.80 ~ ~ FOR ER(~NCY y y .Y
\ y W
\ y, y y ~
y y y \ y y y
\ y y y
/ / Y ~Y .AO J' y
0 p y . •Y y y y y W
/ ~ 1 \ ~O TOP=762.50 ~ \ ~ ~ \ eorra~=~s2oo .E,9 ~ rra X •Y W •Y
y d' `Y G y W y
/ c$P y y W y y y Z
G W W F y y
/ / ~ / ~ 86 . 4~ MI~9E EKING \ ~ 65~ ~ \ \ 6~ \ / ~ ~ ~ IN CUR TYP.1_ W~g~ y y a 'i' y ~
W ~Y y y (U y y y y ~ 0
OWN PA ~ TES7RIPE 64 N WRB j\71?.)G W `V W W W
y .Y y y y W 'Y
W y y Q y y
y y y Z
-788- ~ ~ ~ \ y, W W y y y y YARD INLET THR = 759.80
y y' y FOR EMERGENCY RFLOW
y y W
X y y y yTOPc759.60 •Y W y y y BOTTOM=759.1 g
.Y y y y U
r ~Y 4' W y y y O _
•Y y •Y y y y y y Q M
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y y W W y ~ O^ N o
W W `b y y y U r ~ M y y y Z H W ~O y
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y y ~V ~Y y ~ W~ X Z W x ,T~ ¢ y y y y ~ 7~ Z W ~ W D
J y y Z pp z ~¢tOM ~ > ~ W cp tD V ¢W O(D lf)
~ ~ \ ~ y y y W ZUlntn 3~N1~
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VI WU~C^O ~ Z~w 0000
y y y Z ~QI`~I`~ ~~I~ NW~M \ J ~W~~ vJ ~~w
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4~ NODE0p EKING G \ \ ~ ~ \ \ \ ~ M ~ O
/ IN CURB (TYP.) ~Z ~ ~ TO BE CENTERED 71~ BOITOM9769.20 ~ ' \ ~ ~ \ \ SC L Q ~ ~ N~
ON PAVEMENT STRIPE \ :a ~ oZ
~ ~ o~ \ ~ U
„ x Y~ x
I \ I I ~ 3 OF 12 MONTHS AGED MULCH 6 PONDED N ~ ~ ~ J
R DEPTH PROP. CURB = J ~ ~ Z ~ o c°o BIORETENTION SIZING COMPUTAl1ONS WATE U = s ~ o
/ ~a~ez ~ / \ 1 ~ ~s J F'~Zpl I ~I I \ _ U hn Q HWaooD
DRAINAGE AREA A ~ C-FACTOR ~ 5% (WITH SAND BED) - - TOP EL.-759.60 _ I ~ z ~ M M ~ ~ v> - ~ ~
-i =SIZE OF BIORETENTION AREA _ a i i_i! _ _ _ _ _ _ _ _ _ _ _ ~ o ~ ~ W o^^ ~ BOTTOM EL.-159.10 I ~ L_I i = _ _ _ _ _ _ _ _ ~ I_ 3:1 SLOPE p„ o a ~ ~ g o ~ ~
6' 0.73 AC ~ 0.85 ~ 0.05 = 0.031 AC. - 1,351 SF = _ -_-,__,;I=,
~=1) ~-_-~?LANTING SOIL-_~__,: _1
- - - - - - - -
6 1/4- PEA GRAVEL
- MIN. SAND BED „ ASTM C-33 'A. I (USE
CONC. SAND -
A ooo000000 o iv \ BIORETEN11ON PLANTING COVER COMPUTATIONS ° 0o0°0°0 0 0
BIORETENTION AREA #8 = 1,541 SF = 0.035 AC. 6.0' 6" PERFORATED 0 (ID PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. SEE PLAN z LLI
\ 57 STONE PVC PIPE TOTAL PLANTINGS REQUIRED = 35 PLANTINGS # ~ 15.0 AVG. VIEW FOR INVERTS)
TOTAL PLANTINGS PROVIDED = 35 SHRUBS / TREES
SEC110N 0-0 W = N.T.S. 6" PONDED " J
BIORETENTION #7
SCALE: 1"=20'
3 OF 12 MONTHS AGED MULCH WATER DEPTH
_I11= !r
6" PONDED 3" OF 12 MONTHS AGED MULCH 6" PONDED PROP. CURB WATER DEPTH 3" OF 12 MONTHS AGED MULC WATER DEPTH IS AGED MULCH TOP EL. 759.60 _I11=111=x- Lu 4c
BIORETENTION SIZING COMPUTATIONS [TOP EL.=VARIES = f TOP EL.=VARIES BOTTOM EL.=759.10 3:1 SLOPE
III =
_i - - DRAINAGE AREA A C_FACTOR 5% (WITH SAND BED) TOP EL =VARIES _ BOTTOM EL.=VARIES I I _ - = - - - - - _ - = I I- 3:1 SLOPE III=f 1 I` TOP EL.=VARIES M X-1 - E Z' i
- SIZE OF BIORETENTION AREA - _ II_i aIf I?~I'_ 7 i_ 7, 7. = 111= BOTTOM EL.=VARIES _ 11=1 _-PLANTING SOIL-:=
1.96 AC 0.85 0.05 0.083 AC. = 3,629 SF =III .:4 MIN.'- - - * = , I i-l • _ _ _ _ • l- I I _ _ _ - _ _ _ _ _
JPLANTING SOIL::-_ 3:1 S 3:1 SLOPE - - - - - - III, 6" 1/4" PEA GRAVEL
_If=J:---= - l- ~ 1=1'-= =PLANTING SOIL_ __':If I f I I ~,,,,>.1 MIN. SAND BED,~,,;;;a'. _ 11- -1,:,r~. MIN. 9„
6" 1/4 PEA GRAVEL ~~I I ---------:II- II. . _
;,,:,,f:' 6 1 /1 USE ASTM C-33 MIN. SAND BED, I I 6" 1/4" PEA GRAVEL
I I ':•;.1 ` ''f""'' - ~:.,~;M•. - - - i~_•,:•',;_;..;,, , MIN BIORETENTION PLANTING COVER COMPUTATIONS CONC. AND MIN. SAND BED
o 0c0 0 0 0O0O - _ 112. 0, 6" PERFORATED IN= MIN. 9" m PVC PIPE
BIORETENTION AREA #7 = 3,842 SF = 0.088 AC. 0 0 0 0 0 0 o N
PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. "
TOTAL PLANTINGS REQUIRED = 88 PLANTINGS 5.0' 6" PERFORATED TREES PVC PIPE SEE PLAN 38.0' TOTAL PLANTINGS PROVIDED - 88 SHRUBS / #57 STONE 6 PERFORATED #57 STONE PVC PIPE SECTION P-P W
10.0 AVG. VIEW FOR INVERTS) #57 STONE
SECTION N-N (TYP.) rYP.) N.T.S. mi BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION
SECTION M-M (TYN SCALE: AS SHOWN
N.T.S N.T.S. N.T.S. W
BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION
SCALE: AS SHOWN SHEET: D11OF D20
File No. NC Tax Ma Job No. 03-001 Cadd Dw9. File: DRAIN AGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE
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1OFF 50-YEAR RUNOFF 100-YEAR RUNOFF cc UJ
1-YEAR RUNOFF 2-YEAR RUNOFF 10-YEAR RUNOFF H
INFLOWS T01 MAIN OUTFALL INFLOWS TO: MAIN OUTFALL INFLOWS TO: MAIN OUTFALL INFLOWS T0: MAIN DUTFALL INFLOWS TO! MAIN DUTFALL Volume Peak Time Peak Flow Volume Peak Time Peak Flow
Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peo ume Peak Time Peak Flow a,ft min cfs HYG file HYG ID HYG tag cu, ft min cfs HYG file HYG ID HYG tag cu,ft min cfs
HYG file HYG ID HYG tog cu,ft rein cfs HYG file HYG ID HYG tag cu, ft rein cfs HYG file HYG ID HYG tag cu,ft
32933 739, 00 5, 62 PRE, HYG SUBAREA 1 50yr 62265 738, 00 11, 66 PRE, HYG SUBAREA 1 100yr 71514 738, 00 13, 56
YG SUBAREA 1 1YR 5454 750,00 43 PRE.HYG SUBAREA 1 2yr 10486 744.00 1.23 PRE, HYG SUBAREA 1 10yr 32933 i PRE H 4606 890.00 14 PRE, HYG SUBAREA 2 2yr 13971 764, 00 1. 11 PRE. HYG SUBAREA 2 10yr 45477 45477 756.00 5. 24 PRE, HYG SUBAREA 2 50yr 87184 755. 00 11,25 PRE, HYG SUBAREA 2 100yr 100399 755, 00 13. 16
PRE, HYG SUBAREA 10 lYR PRE, HYG SUBAREA 11 1Y R 5803 905.00 17 PRE, HYG SUBAREA 3 2yr 14960 796.00 .91 PRE, HYG SUBAREA 3 10yr 48696 i 48696 783, 00 4, 08 PRE. HYG SUBAREA 3 50yr 93355 783, 00 8.65 PRE, HYG SUBAREA 3 100yr 107505 783, 00 10, 11
PRE, HYG SUBAREA 12 lYR 6088 915. 00 18 PRE, HYG SUBAREA 4 2yr 19875 799, 00 1.22 PRE, HYG SUBAREA 4 10yr 62423 >2423 787.00 5, 18 PRE, HYG SUBAREA 4 50yr 118021 787.00 10.69 PRE, HYG SUBAREA 4 100yr 135554 774, 00 12, 45 X X P. 103008 765.00 11.99
1 YR 7049 775. 00 39 PRE. HYG SUBAREA 5 2yr 14334 775. 00 1.04 PRE, HYG SUBAREA 5 10yr 46659 i PRE, HYG SUBAREA 2 16659 766.00 4, 84 PRE, HYG SUBAREA 5 50yr 89449 766, 00 10.27 PRE, HYG SUBAREA 5 100yr
lYR 7548 810, 00 35 PRE, HYG SUBAREA 6 2yr 13040 796. 00 , 70 PRE, HYG SUBAREA 6 10yr 45979 PRE, HYG SUBAREA 3 15979 783. 00 3. 59 PRE. HYG SUBAREA 6 50yr 90819 782,00 8.06 PRE. HYG SUBAREA 6 100yr 105171 782, 00 9. 52 ')9821 809. 00 4. 85 PRE. HYG SUBAREA 7 50yr 130265 808. 00 9.76 PRE, HYG SUBAREA 7 100yr 149240 807, 00 11.31
PRE, HYG SUBAREA 4 1YR 10336 800. 00 49 PRE, HYG SUBAREA 7 2yr 22985 809, 00 1. 24 PRE. HYG SUBAREA 7 10yr 69821 £ ')3542 788.30 4. 98 788 36 PRE. HYG SUBAREA 8 100yr 137984 788.00 12, 07
PRE, HYG SUBAREA 5 1YR 7232 785.00 38 PRE, HYG SUBAREA 8 2yr 20231 802,00 i.20 PRE. HYG SUBAREA a 10yr 63543 37370 785,00 2, 90 PRE, HYG SUBAREA 9 50yr 76301 785.00 6.82 PRE, HYG SUBAREA 9 100yr 88897 785, 00 8, 11
6124 820,00 24 PRE. HYG SUBAREA 9 2yr 9646 797,00 46 PRE. HYG SUBAREA 9 10yr 37370 PRE, HYG SUBAREA 6 lYR 11661 806.00 2.57 PRE, HYG SUBAREA 10 50yr 85062 806.00 6.02 PRE,* HYG SUBAREA 10 100yr 99104 806.00 7, 17 0 W
PRE, HYG SUBAREA 7 lYR 12285 825,00 ,55 PRE,HYG SUBAREA 10 2yr 10753 835,00 44 PRE, HYG SUBAREA 10 10yr 41661 F 00 50 PRE. HYG SUBAREA 11 2yr 13547 862.00 52 PRE. HYG SUBAREA 11 10yr 52485 £ PRE, HYG SUBAREA 8 lYR 10520 815 52485 822, 00 2, 89 PRE, HYG SUBAREA 11 50yr 107161 822. 00 6.72 PRE, HYG SUBAREA 11 100yr 124852 822. 00 7.99 J
4132 835.00 13 PRE. HYG SUBAREA 12 2yr 12966 903.00 47 PRE. HYG SUBAREA 12 10yr 45724 F PRE, HYG SUBAREA 9 lYR 15724 881.00 2, 11 PRE, HYG SUBAREA 12 50yr 90316 853.00 4.52 PRE, HYG SUBAREA 12 100yr 104589 853.00 5, 33

PRE.HYG MAIN OUTFALL 1YR 87177 815,00 3.34 PRE,HYG MAIN OUTFALL 2yr 176796 796,00 8.74 PRE,HYG MAIN OUTFALL 10yr 592770 PRE,HYG MAIN DUTFALL 50Yr 1150337 774.00 86.80 PRE,HYG MAIN DUTFALL 100yr 1327819 774.00 102, 05 X2770 783,00 40,07
W
SHEET: D12 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001SWMPRE XREF: DRAINAGE PLAN STATE/03001BASE

PREDEVELOPMENT TIMES OF CONCENTRATION Tc
SUBAREAI
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope .055000 ft/ft
Avg.Velocity 14 ft/sec
Segment #1 Time: 34. 94 min
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 620.00 ft
Slope . 058000 ft/ft
Unpaved
Avg. Velocity 3,89 ft/sec
Segment #2 Timet 2. 66 min
--------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 45,0000 sq. f t
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .019000 ft/ft
Mannings n .0450
Hydraulic Length 264.00 ft
Avg. Velocity 7. 26 f t/sec
Segment #3 Time: 61 min
Total Tci 38,21 m i n
-----------------------
SUBAREA 2
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n
.4000
sq. ft
Wetted Perimeter
Hydraulic Length
300.00
ft
0. 00
2yr, 24hr P
3.1200
in
ft/ft
Slope
.041000
ft/ft
Hydraulic Length
Avg. Velocity
.13
ft/sec
--------------------------------------------------------
1489.00
Segment #1 Time;
39. 30 min
Segment #21 Tc:
TR -55 Shallow
�s
Hydraulic Length
631.00
ft
ttttttttttttttitt'
Slope
.055000
ft/ft
\I
"'
Unpaved
CC
c
Z
JNJ
J
co
Avg. Ve t oc i ty
3,78
f t/sec
U<v
D
----------------
------
---------
Segment #2- Time,
--------------------
2.78 min
Segment #3: Tc:
TR -55 Channel
Flow Area
20,0000
sq. ft
Wetted Perimeter
14.94
ft
Hydraulic Radius
1.34
ft
Slope
.015000
ft/ft
z
Mannings n
.4500
Hydraulic Length
270.00
ft
Avg. Velocity
.49
ft/sec
-------------------------------
Segment- #3 Time,------
9_14 min
-Total-Tci-----51_22-min-
58. 48 m i n
SUBAREA 3
--------------------------------------------------------------
Segment #lt Tct TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope . 026000 ft/ft
Avg, Ve t oc i ty 11 f t/sec
Segment #1Time, 47.15 min
------------------------------- -
--------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 682.00 ft
Slope . 050000 ft/ft
Unpaved
Avg. Velocity 3,61 ft/sec
Segment #2 Time315 min
------------------------------- ------- _
Segment #3i Tc, TR -55 Channel
Flow Area 5,0000 sq. f t
Wetted Perimeter 7.47 ft
Hydraulic Radius .67 ft
Slope .015000 ft/ft
Mannings n .4500
Hydraulic Length 343.00 ft
Avg.Velocity 31 ft/sec
Segment #3 Time: 18.42 min
-------------------------------
--------------------
Total Tci 68.73 m i n
File No. i4C Tox Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPRE
SUBAREA 4
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3,1200 in
Slope 020000 ft/ft
Avg. Velocity .10 ft/sec
Segment #1 T i me: 52.37 min
Segment #2: Tci TR -55 Shallow
Hydraulic Length 972.00 ft
Slope . 033000 ft/ft
Unpaved
Avg. Velocity 2,93 ft/sec
Segment #2 Time, 5. 53 min
--------------------------------------------------------------
Tota t Tci 57,90 m i n
SUBAREA 5
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n
.4000
sq. ft
Wetted Perimeter
Hydraulic Length
300.00
ft
0. 00
2yr, 24hr P
3.1200
in
ft/ft
Slope
. 063000
ft/ft
Hydraulic Length
Avg. Velocity
.15
ft/sec
--------------------------------------------------------------
1489.00
Segment #1 Time:
33. 10 min
Segment #21 Tci
TR -55 Shallow
�s
Hydraulic Length
276.00
ft
ttttttttttttttitt'
Slope
.062000
ft/ft
\I
"'
Unpaved
CC
c
Z
JNJ
J
co
Avg. Velocity
4,02
ft/sec
U<v
D
--------------------------------------------------------------
Segment #2 Time:
1. 15 min
Segment #3t Tc:
TR -55 Channel
Flow Area
45,0000
sq. ft
Wetted Perimeter
22,52
ft
Hydraulic Radius
2.00
ft
Slope
.010000
ft/ft
z
Mannings n
.4500
Hydraulic Length
764.00
ft
Avg. Velocity
.53
ft/sec
---------------------------------------_-
Segment #3Time
24 24 min
Total Tct
58. 48 m i n
SUBAREA 6
------- ------------------------------------------------------
Segment #11 Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope 023000 ft/ft
Avg. Velocity .10 ft/sec
Segment #1 Time: 49 53 min
----------------------------------------_--
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 719.00 ft
S lope075000 ft/ft
Unpaved
Avg. Velocity 4,42 ft/sec
Segment #2Time271 min
----------------------------------------_-
Segment #31 Tc TR -55 Channel
Flow Area 20.0000 sq. f t
Wetted Perimeter 14.94 ft
Hydraulic Radius 1. 34 ft
Slope .008500 ft/ft
Mannings n .4500
Hydraulic Length 472.00 ft
Avg.Vetocity 37 ft/sec
Segment #3 T i met 21,22 min
Tota t- Tc,
-----73_45-min
SUBAREA 7
---------------------
Segment #1: Tc: TR -55 Sheet
Mannings n 4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3. 1200 in
Slope 017000 ft/ft
Avg. Velocity .09 f t/sec
Segment #1 Time: 5589 min
-------------------------------------_
Segment #2i Tc: TR -55 Shallow
Hydraulic Length 526.00 ft
Slope 068500 ft/ft
Unpaved
Avg. Velocity 4,22 ft/sec
------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 5.0000 sq. ft
Wetted Perimeter 7. 47 ft
Hydraulic Radius .67 ft
Slope 017500 ft/ft
Mannings n .4500
Hydraulic Length 516.00 ft
Avg. Velocity 34 ft/sec
Segment #3 Time: 25. 66 min
- - - -- -- - - - - - - - - - - - - - - -- --- - - -- - - - -- - - - - -- - - - -- - - - ---- - --- -- - -
Tota l Tct 83,63 m I n
SUBAREA 8
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3.1200 in
Slope 033000 ft/ft
Avg. Velocity .12 f t/sec
Segment #1 Time: 42. 87 min
--------------------------------------------------------------
Segment #2i Tc: TR -55 Shallow
Hydraulic Length 673.00 ft
Slope . 043000 ft/ft
Unpaved
Avg. Ve t oc i ty 3.35 f t/sec
Segment #2 Time, 3. 35 min
Tota l Tci 46. 22 m i n
SUBAREA 9
--------------------------------------------------------------
Segment 41, Tc- TR -55 S!)eet
Mannings n 4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3, 1200 in
Slope .037000 ft/ft
Avg. Velocity .12 ft/sec
Segment #1Time 40
------------------------------- - ------ _ min
-
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 973.00 ft
S lope 057000 ft/ft
Unpaved
Avg. Velocity 3. 85 ft/sec
Segment #2 Timet 4
------------------------------- ------ _ 21min
-
Segment #3. Tc: TR -55 Channel
Flow Area 45.0000 sq. f t
Wetted Perimeter 22. 42 ft
Hydraulic Radius 2.01 ft
Slope . 033000 ft/ft
Mannings n .4500
Hydraulic Length 245.00 ft
Avg. Velocity .96 ft/sec
Segment #3 Timet 4. 27 min
Total Tci---- 49_42 -min
SUBAREA 10
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3. 1200 in
Slope 040000 ft/ft
Avg. Velocity .13 ft/sec
Segment #1 Time 39,69 min
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 517.00 ft
Slope . 066000 ft/ft
Unpaved
Avg. Velocity 4.15 ft/sec
Segment #2 Time, 2. 08 min
--------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 45.0000 sq. f t
Wetted Perimeter 22. 42 ft
Hydraulic Radius 2.01 ft
Slope 026000 ft/ft
Mannings n 4500
Hydraulic Length 1135.00 ft
Avg. Ve l oc t ty .85 f t/sec
Segment #3 Timet 22. 27 m i n
Total Tci 64. 04 m i n
-----------------------
SUBAREA 11
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3. 1200 in
Slope 057000 ft/ft
Avg. Velocity .15 ft/sec
Segment #1 T i met 34,45 min
--------------------------------------------------------------
Segment #21 Tci TR -55 Shallow
Hydraulic Length 1002.00 ft
Slope 036000 ft/ft
Unpaved
Avg. Velocity 3.06 ft/sec
Segment #2 Time: min
--------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 45.0000 sq. f t
Wetted Perimeter 22,42 ft
Hydraulic Radius 2.01 ft
Slope 016000 ft/ft
Mannings n 4500
Hydraulic Length 629.00 ft
Avg. Velocity .67 ft/sec
Segment #3 Time: 15. 73 min
Total-Tci-----55_63-min
SUBAREA 12
--------------------------------------------------------------
Segment #1: Tc: TR -55 Sheet
Mannings n .4000
Hydraulic Length 300.00 ft
2yr, 24hr P 3. 1200 in
Slope 013000 ft/ft
Avg.Velocity 08 ft/sec
Segment# 1Time 62
-------------------------------------------------------------- 22 m i n
Segment #2: Tci TR -55 Shallow
Hydraulic Length 673.00 ft
Slope 031000 ft/ft
Unpaved
Avg, Velocity 2. 84 ft/sec
Segment #2 Time, 3. 95 min
Tota t Tci 66. 17 m i n
PREDEVELOPMENT
TRAVEL TIMES Tt
TRAVEL TIME 1
Segment #1: Tc: TR -55 Channel
Flow Area
0,0000
sq. ft
Wetted Perimeter
0. 00
ft
Hydraulic Radius
0. 00
ft
Slope
. 000000
ft/ft
Mannings n
.0000
ft/ft
Hydraulic Length
0. 00
ft
Avg. Ve loc i ty .00 ft/sec
------------------------------------------
-Total-Tti----- 0_00 min
TRAVELTIME 2
------------------------------------------
Segment #lt Tci TR -55 Channel
Flow Area 45.0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2. 01 ft
Slope .021000 ft/ft
Mannings n .4500
Hydraulic Length 570.00 ft
Avg. Velocity 76 ft/sec
Total Ttt 12. 44 m i n
TRAVEL TIME 3
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq. f t
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope . 016000 ft/ft
Mannings n .4500
Hydraulic Length 1168.00 ft
Avg.Velocity 67 ft/sec
------------------------------------------
-Total Ttt-----29_21-min
-
TRAVEL TIME 4
Segment #lt Tc: TR -55 Channel
Flow Area 45.0000 sq, f t
Wetted Perimeter 22.42 ft
Hydraulic Radius 2. 01 ft
Slope .017000 ft/ft
Mannings n 4500
Hydraulic Length 1808.00 ft
Avg. Ve t oc i ty 69 f t/sec
------------------------------------------
Total Ttt 43,87 min
TRAVEL
-----------------------------------------TotalTtt43_87min
TRAVEL TIME 5
-------------------------------------------
Segment #1: Tc: TR -55 Channet
F low Area 45,0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope . 010000 ft/ft
Mannings n .4500
Hydraulic Length 481.00 ft
Avg.Velocity 53 ft/sec
-Total Tti
-----15_22-min
-
TRAVEL TIME 6
Segment #1: Tc TR -55 Channel
Flow Area 45.0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .015000 ft/ft
Mannings n .4500
Hydraulic Length 1073.00 ft
Avg. Velocity .65 ft/sec
------------------------------------------
-Total-Ttt=-===27_71-min-
TRAVEL TIME 7
------------------------------------------
Segment #1: Tc: TR -55 Channel
Flow Area 45. 0000 sq. ft
Wetted Perimeter 22. 42 ft
Hydraulic Radius 2.01 ft
Slope 013000 ft/ft
Mannings n 4500
Hydraulic Length 1739.00 ft
Avg. Ve t oc i ty .60 f t/sec
Total Ttt-----48_25-min
-
TRAVEL TIME 8
------------------------------------------
Segment #lt Tci TR -55 Channel
Flow Area 45.0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .014000 ft/ft
Mannings n 4500
Hydraulic Length 2366.00 ft
Avg. Ve loc 1 ty .62 ft/sec
------------------------------------------
sasssasssssssssasssssssss
Tota l Ttt 63,26 M i n
0
TRAVEL TIME 9
Segment #1: Tc: TR -55 Channel
Flow Area
45,0000
sq. f t
o
U
Wetted Perimeter
22. 42
ft
Hydraulic Radius
2.01
ft
Slope
010000
ft/ft
Z
Mannings n
.4500
Hydraulic Length
1489.00
ft
a
�s
Avg. Velocity .53 f t/sec
0
1/4
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_Total Tti_---_47_10 min co-
O
TRAVEL TIME 10 a
------------------------------------------ oCn
s
Segment #1: Ta TR -55 Channel 3 Z W o
Flow Area 45. 0000 sq. f t LV �d a z n ° ¢ co "'
Wetted Perimeter 22.42 ft Z� � Z �'
Z �Q t 10 89
Hydraulic Radius 2.01 ft O Z 2 2
O co
Slope 010000 ft/ft
Mani n s n .4500 QQ "'r- r 3 N_ "' o
HydraulicgLength 2132,00 ft J ^�' cat �ow
Avg. Velocity .53 f t/sec
------------------------------------------
0
C M
-Total -Ttt -67_44-min- E5
C>< Q N00
N� CL
Oco
Z oZ
Q
�
U
X Y x
Q
TRAVEL TIME 11 =� z = CD CD
------------------------------------------ o � o
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Segment #11 Tc, TR -55 ChannelM � R � C3o m
F low Area 45.0000 sq. ft
Wetted Perimeter 22.42 ft
Hydraulic Radius 2.01 ft
Slope .010000 ft/ft
Mannings n .4500 Z st_
Hydraulic Length 3114.00 ft W J
Avg.Velocity 53 ft/sec2W9= O
a
------------------------------------------ t3 a
O v
__________ .i Q
_Total Tti_-__-98_51-min - W ■ W
J H- oc
W 0 O
TRAVEL TIME 12 'j Z
cc
------------------------------------------ W44
0%
Cc a Uj >
= �
Segment #1: Tc: TR -55 Channel V he Z
Flow Area 45. 0000 sq. f t LL.
Wetted Perimeter 22.42 ft O O
Hydraulic Radius 2.01 ft 0
Slope .010000 ft/ft V
Mannings n .4500 O
Hydraulic Length 4647.00 ft x =
Avg.Velocity 53 ft/sec
W �
------------------------------------------
Z
O W
_Total Ttt147_00 min-
U �
W
SHEET:D13 OF D20

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02=102.1 CFS
010= 158.3 CFS TO EDW #2 a Lu o
~ - ~ A =11.46 Ac 0 C'3 a W a
SUBAREA 1D
CN = 98 W J u, x
AREA =10.57 Ac Q 1 = 37.9 CFS o =J ~ o
CN = 98 SUBAREA 3E Q 2 = 46.1 CFS (1) > j °z
A
9g~, , Q2= 42.5 CFS AREA = 4.17 Ac
SUBAREA 3D 010- 71.5 CFS a W U F
Q10= 65.9 CFS CN = 98
AREA = 6.45 Ac TO EDW #3 a Q LL. ~
(]2 =16.8 CFS
CN = 98 o J v
01()= 26.0 CFS
f Y Y' ~ ~'I Q2= 25.9 CFS A = 73.89 Ac F X v ~
o
00.0 ~ !'i_ CN=98 w 010= 40.2 CFS
j~ C>> = 244.34 CFS ~ O w
- , , - ~?eames R POST-DEVELOPMENT DRAINAGE SCALE: 1"=100' 3Rd. ~ 02= 297.20 CFS co z Y
W
kGE AND FLOW PATH 010= 460.79 CFS co
SHEET: Dl 4 OF D20
File Na NC ,a Map x> Jo, Ne 03-001 <a,a o.s. File: oR.,N.GE,03001SW,POS. mEF DRAINAGE PLAN S a`E,o=00,aa=E

~ N ~
~ ~ 0 U U
U _ - - _ ? ~ s ~
~ ~ ~
Elevation Outflow Storage Area Inftlt, Q Total 2S/t + ~ ft cfs cu, ft sq. ft cfs cfs cfs Y
W a
733, 00 , 00 0 22895 . 00 , 00 ~ 00 - n a
733, 10 , 04 2301 23145 , 00 .04 76, 76 ° ~ U
733, 20 .06 4629 23397 .00 , 06 154.37 O z c
733. 30 , O7 6981 23650 . 00 , 07 232.78 N
733, 40 , 08 9360 23905 , 00 .08 312, 07 N ~ N
733, 50 , 09 11762 24160 , 00 , 09 392, 17 733, 60 , 10 14191 24418 , 00 , 10 473, 12
733, 70 , 11 16646 24676 , 00 , 11 554, 98 W Z Z
733, 80 , 12 19126 24936 , 00 , 12 637, 66
733, 90 , 12 21634 25197 , 00 , 12 721 ~ 25 S
734, 00 , 13 24166 25460 , 00 ~ 13 805.67 = o
T STORM 734, 09 , 14 26541 25688 .00 . 14 881', 42 ¦ ~ U b ~ ~ ~ M~
734, 10 , 15 26724 25714 .00 . 15 890.95 O ~ ~ °
734, 20 , 19 29309 25969 .00 , 19 977. 17 1" STORM DRAWDOWN = ~ ~ 0°
734, 30 , 19 31918 26225 , 00 , 19 1064, 13 734. 40 , 21 34555 26482 , 00 , 21 1152, 02 " U 2 1 /4 DIA. HOLE ~ ~
734, 50 , 22 37215 26741 .00 .22 1240, 72 ~ ~ N p a
~a 734. 60 , 23 39901 27000 .00 , 23 1330, 28 ~ t~ °
734, 70 , 24 42615 27262 .00 , 24 1420. 76 Z [1
734, 80 , 25 45354 27524 , 00 , 25 1512. 06 W ~ W
EDW #2 IN loo 734, 90 .27 48121 27788 , 00 , 27 1604.29 „ 0 N Z PROP. 18 oC
7 0 .27 50912 28053 ~ 00 , 27 1697.34 35 0 0 00 EDW #2 OUT 1 W CL III RCP W Q
735. 10 , 28 53730 28319 , 00 , 28 1791.28 ~ Z ~
735.20 , 29 56576 28586 . 00 , 29 1886, 16 735. 30 , 30 59448 28855 , 00 . 30 1981, 88 N
735. 40 ~ 31 62348 29125 , 00 , 31 2078, 56 ~ Z Q W p.
735.50 ~ 32 65273 29396 , 00 , 32 2176, 08 BMP TRASH RACK 0 ~
735, 60 , 33 68225 29669 , 00 , 33 2274, 50 U ~ c o (SEE DETAIL) Z U N
735, 70 , 33 71207 29942 , 00 , 33 2373, 90
735. 80 , 34 74214 30217 ~ 00 .34 2474, 15 z
735, 90 , 35 77251 30494 , 00 , 35 2575, 38 w J
736, 00 , 36 80313 30771 , 00 , 36 2 77.46 1-YR STORM 736, 01 , 36 80631 30798 , 00 , 36 2687, 74 24"W X 24"H X 1 4" SOLID GALV. N
736, 10 , 43 83403 31038 .00 .43 2780 52 STEEL PLATE FAS ENED WITH
736, 20 , 56 86521 31305 , 00 .56 2884, 60 - BOLTS AND SEALEO WITH SILICONE STEPS 1.0' SPACING TYP.) 50 YR. WSE 738.15 (
736, 30 , 73 89664 31574 , 00 , 73 89, 54 ~ ~ 10 YR. WSE= 737.49 TRASH RACK
2-YR STORM 136.38 , 87 92081 31790 , 00 .87 3074. 19 6"x 18"z 1 4" GALV. PLATE ~w~?'~jp14401jrrrr~rl~~ - / ~~i 2 YR. WSE- 736.38 T T
736, 40 . 91 92837 31844 , 00 , 91 3095, 46 - TRASH RACK (4 AT EACH JOIN BOL ED oeeeeee 1 YR. WSE- 136.01 I ~ ~ °eo TO R SER} ~ v eo 0 7
736, 50 1. 11 96034 32115 , 00 1, 11 3202 23 SOe ~u1 °oYN
736, 60 1, 33 99258 32388 , 00 1, 33 3309.92 0 ae~ _ ~ ~o Wo = TOP 737.49 _ _
736, 70 1.54 102512 32661 , 00 1, 54 3418, 59 - - 736. 80 1, 76 105791 32936 , 00 1, 76 3528, 12 - =U°~°~~ zg'~= 1 oW °
736, 90 1, 98 109099 33212 , 00 1, 98 3638, 62 ~ ~y o C~ o°~t/ 0.80 • MIN. PRECAST RISER SEGMENT : ° e° Q-
737, 00 2, 20 112434 33489 . 00 2, 20 3749, 98 :,d' oo°° F • EL.=736.01 WITH FLAT TOP i~~~ ao ~F
737. 10 2, 42 115796 33767 , 00 2, 42 3862, 26
737.20 2.62 119187 34046 , 00 2, 62 3975, 53 liphuu n~NN~~~~ 4 z4 JUNCTION 0.2 W z 0.1 H HOLE 4' z4' J NCTION PRECAST RISER r""""' 5" BOX TYP
737.30 2, 82 122605 34326 , 00 2. 82 4089, 65 „ _ " BMP TRASH RACK BOX (TYP) SEGMENTS „ „ 1 STORM WSE- 734.09 ~
737. 40 3, O1 126053 34608 .00 3. O1 4204. '?7 24 W X 30 H X 1/4 SOLID GALV. = (SEE DETAIL) a• a
10-YR STOi1M 737, 49 3, 17 129133 34862 , 00 3, 17 4309, 10 737.50 3, 24 129527 34890 .00 3.24 43 , 80 SEE DETAIL THIS SHEET. " ° ( ) 1 DRAWDOWN
737, 60 5, 11 133029 35174 , 00 5, 11 4439, 41 - " IA H L 1 2 1/4 D O E WATER TIGHT CONNECTION
737.70 8. 12 136562 35459 , 00 8. 12 4560. 19 _ ~ PROVIDE SLUICE PROP. 18" INV. 733.00 GATE FOR
737.80 11, 90 140122 35745 , 00 11, 90 4682, 61 CL III RCP ' EMERGENCY DRAIN
737, 90 16, 30 143712 36033 , 00 16, 30 4806.69
738, 00 21, 24 147329 36321 , 00 21 ~ 24 4932. 19 BOTTOM= 731.50 "
738, 10 26, 64 150974 36600 . 00 26, 64 5059.09 A
50-YR STORM 738, 15 29, 51 152809 36740 , 00 29.51 5123. 14 738, 20 32, 47 154649 36881 , 00 32, 47 5187, 44 e~ ~ .a INV.= 731.40 , . 20 / , , a' PRECAST RISER
738, 30 38, 69 158351 37162 , 00 38.69 5317, 03 2 IN lYR „ • . • ~ \ SEGMENT WITH BASE
EDW # 738, 40 45.27 162082 37445 , 00 45.27 5448, 00 G i' ~r \ • i
738, 50 52. 17 165840 37728 , 00 52, 17 5580, 16 EDW 2 OUT lYR U ~ ,CONC. ENCLOSURE
~ # 738, 60 59, 39 169626 38013 , 00 59, 39 5713, 58 i\/\i 8 / SHAPE BOTTOM TO POUR IN BASE TO
738, 70 66, 91 1.73443 38299 . 00 66, 91 5848, 33 z SLOPE INVERT COUNTERACT ~
738, 80 74.69 177286 38585 . 00 74, 69 5984, 22 TO OUTLET BUOYANCY a
738, 90 82. 75 181161 38873 , 00 82, 75 6121, 42 CO STRUCTURE NOTE :ALL JOINTS BETWEEN PRECAST w DETENTION NTROL
739, 00 91, 05 185061 39162 , 00 91. 05 6259, 75 739, 10 99, 58 188991 39452 , 00 99, 58 6399, 27 RISER SEGMENTS SHALL BE °
739, 20 108. 35 192952 39743 , 00 108, 35 6540, 08 STANDARD 4' x 4' JUNCTION BOX OR EQUNALENT MADE WATER TIGHT WITH
739, 30 117, 33 196940 40035 , 00 117. 33 6681, 99 (PRIVATELY OWNED AND MAINTAINED) BUTYL RUBBER 0-RING
739, 40 126, 52 200960 40328 ~ 00 126, 52 6825, 16 PER NORTH CAROLINA DOT GASKETS. o z
739, 50 135. 90 205006 40623 , 00 135, 90 6969, 43 NOT TO SCALE
739.60 145. 47 209082 40918 , 00 145. 47 7114, 87
.739. 70 155, 23 213191 41214 , 00 155.23 7261. 56 N
739, 80 165, 15 217326 41512 .00 165, 15 7409, 33 J
739, 90 175, 26 221493 41810 , 00 175, 26 7558, 36 740, 00 185, 51 225688 42110 , 00 185, 51 7708, 45 o g U
~o~~ ~o~ O
Q M O
1' STORM ROUTING SUMMARY - - 24"W X 30"H X 1 4" SOLID ° METAL GRAl1NG (GALV, STEEL) / ^
" STEEL PLATE BOLTED TO U o WELDED TO i/4 SOLID STEEL PLATE Z ~ W -M
INFLOW/OUTFLOW HYDROGRAPH SUMMARY (3"z1" MAX. OPENING) STRUCTURE WITH SILICONE ~ ~
~ W~ x ~ x -j=°3 a Z?wo
Peak Inflow = 13.57 cfs at 715, 00 r~ln SILICONE SEALANT ~ Z z ~ ~ pC ~ ~ °a ~ ' „ 18 „ W ~ ~ 4~ N~coc~
Peak Outflow = . 14 cfs at 1171, 00 Min 3 3 n n HOE U w aw~~ Z z°N~ 2 1/4 1 STORM ORAWDOWN L Z Z° 0 ~ o
az ~ ~ ~ °V I ~ e •a~ ~ ~Q000p V NN
Peak Elevation = 734,09 ft ' •a ~ WOO f0 ~ J<Y 000
Peak Storage = 26541 cu. ft e ~ ~F-r~M Q V o~r~~ e, • ~QI~1~~~AA NwOO
' n rWw v~ • 24
1-YR STORM ROUTING SUMMARY .a; • a ,e.
a a
INFLOW/OUTFLOW HYDROGRAPH SUMMARY e~, a•
o °
Peak Inflow = 37, 90 cfs at 715, 00 r~ I n o ° ~ r->
Peak Outflow = , 36 cfs at 1224, 00 Min a~ o » n ~M 3 3 Q
EDW #2 IN 2 r Y _ ~ .z
Peak Elevation 736,01 ft ~ = ft o N oz ~ as F- U O~
Peak Storage 80631 cu, EDW #2 OUT 2 r ~ Y RISER STRI U ~
RISER STRUCTURE FLOTATION CALCULATIONS ELEVATION ~ ~ X Y ~ x
I. WEIGHT OF N J W J ~ D 3J0°OiD OJO~ I. WEIGHT OF WATER DISPLACE
2-YR STORM ROUTING SUMMARY ~OOOrn ~ W ~°tDl
CONCRE' N R TE BASE = Ah ~ Q v o`-~M Q Nw~B°
INFLOW/OUTFLOW HYDROGRAPH SUMMARY = 6.17 ft 6.17 ft 0.67 ft = 25.51 ft s t 4" I STEEL PLATE ° W w o^^ ( ) ( ) ~ / SOLD ~ O ~
0 TED TO STRUCTURE ° ¢ ~ ~ ~ ° ~ N BL
Peak Inflow = 46, 09 cfs at 715, 00 MIn MANHOL MANHOLE = Ah M
Peak Outflow = , 87 cfs at 939, 00 Min _ (4.83 ft) 4.83 ft) (4.49 ft} b = 104.75 f ~

Peak Elevation = 736,38 ft Peak Stora e = 92081 cu, ft ® WHERE I WHERE h = 10 YR. ELEV. -BMP INV. METAL GRATING (GALV. STEEL)
9 n Z = 737.49 - 733.00 ' WELDED TO 1/4 SOLID STEEL PLATE
~ ~ r~~~
uuu u uuu u uuu (SUUu _ '+.4y IL d, `J Al NINA. W-LI91IW) mmm
Timm may cv . 1
TOTAL 1 TOTAL VOLUME DISPLACED = 25.51 + 104.75 = 130.26 1 ui 0
10-YR STORM ROUTING SUMMARY TOTAL V ° TOTAL WEIGHT OF WATER DISPLACED = (1.3)(130.26 ft3)(62.4 lb) = 10,567 lb
ft3 ..A , 1
INFLOW/OUTFLOW HYDROGRAPH SUMMARY - WHI WHERE 1.3 = FACTOR OF SAFETY
a,.
Peak Inflow = 71.47 cfs at 715.00 m i n Peak Outflow - 3.17 cfs at 789.00 Min 11. WEIGHT 01 Ii. WEIGHT OF CONCRETE W
70
Peak Elevation 737,49 ft VOL COP VOL CONCRETE BASE = A h
Peak Storage = 129133 cu. ft (6.17 ft)(6.17 ft) (0.67 ft) = 25.51 ft3 ~
SECTION j
A VOL MAI VOL MANHOLE WALLS - [A (OUTSIDE WALL) - A (INSIDE WALL)] x H 0 > Z
1 DRAWDOWN OVER 2 TO 5 DAYS = [(4.83)(4.83) - (4.0)(4.0)] 7.99 NOTES:
= 58.56 ft3 1. ALTERNATIVE CAGE CONFIGURATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY n
OUTSET COMPUTATION 50-- THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS. z ui
VOL. CC VOL. CONCRETE PLACED IN BOTTOM OF MANHOLE 2. THIS DETAIL (METAL GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE
DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY VOL. = A h RISER. Z
= (4.0 ft)(4.0 ft) (2.0 ft) 3. FOR LARGER CAGES (HEIGHT > 5) A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL - 32.00 ft3 BE INSTALLED ON THE FRONT FACE OF THE CAGE. LL
40
(A) 1" STORAGE REQUIREMENT (S) (a) 35,360 CF (SEE SHEET D6) EDW #2 IN 10Yr TOTAL 1 TOTAL VOL. CONCRETE = 25.51 + 58.56 + 32.00 = 116.07 ft3
(B) MAXIMUM HEAD (h) AT THE REQUIRED 1" STORAGE FROM 30EDW #2 OUT lOYr TOTAL ~ TOTAL WEIGHT OF CONCRETE _ (116.07 ft 3)(150 lb) = 17,411 ibs
THE ELEVATION-STORAGE CURVE FOR THE FACILITY (b) 1.60 FT (734.60 - 733.00) ft3 BIVIP RELEASE HOLE AND TRASH RACK DETAIL 0 1
CONCLUSION ; CONCLUSION : 10,567 lb < 17,411 lb N.T.S.
(C) PEAK OUTFLOW RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. N
TIME OF 60 HRS [Qp - S/(1.0 x 3600 x 60] 20 # m
0.00000463 x LINE a 35,360 = c 0.1637 CFS
D REQUIRED ORIFICE AREA A A= Q p/(0.6 x 64.4 x ho-' 10 0 Z W
LINE (c) 0.1637 [0.6 x (64.4 x LINE (b) 1.60 0'5] (d) 0.0269 J
(E) DIAMETER OF A CIRCULAR ORIFICE W
2.0 x (LINE (d)_9.0269/3.1415927) 15 (e) 0.185 FT 500 1000 1500 2000
2 1/4" DIA. ORIFlCE Time (min)
Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPOSTI File No. NC Tax Map No. SHEET: D15OF D20

~ ~ F- 0
U U
EDW #2 -1" HYDROGRAPH EXTE U
_ ? U
_ Y
" . Q - W
PO
a ~ U °
D
Z O
N N
~ N
~ g W Z
Z (3
Z ~ 5
n.
~o M N V o
~ ~ S o0 ~ MN
O ~ i _
EDW #2 IN 100 U ~ W ^ n~
io EDW #2 OUT 100 1" STORM DRAWDOWN ~ ~
5 1 2" DIA. HOLE ~ p Q / °
o a ~ Z LL
W
~ F'L ~ ~ Z
~ M
00 „ W c0 PROP, 36 W Q Tp
CL III RCP Z I N
0 Z n. a ~
~ W 0.
0 n c~ U ~ 0 0
Z U N .ni
0 BMP TRASH RACK
~ X000 ~ ~~~0 SEE DETAIL ~ ( ) z u_i
I ~
~~~ru~ (~u~a) 24"W X 30"H X 1 4" SOLID GALV.
STEEL PLATE FAS ENED WITH ,
EDW #2 -1-YR HYDROGRAPH SEALED WITH SILICONE STEPS 1.0 SPACING (TYP.) a??ulmu BOLTS AND u?? ~N,,,,~~
50 YR. WSE= 741.51 TRASH RACK . WSE= 740.39 6"x 18"x 1 /4" GALV. PLATE 0°°0peo pi, 10 YR TED ? ~a °0
2 YR. WSE= 138.18 (4 AT EACH JOINT BOL ~ v e 007
TRASH RACK TO RISER : ~ o ,n M e~N YR. WSE= 137.93 ) o o~,o 1_ ado ~-',~o =
=U°tn ar0 Q3Z°-~=
TOP= 740.39 Sti o ~ o ~ W
' s ' 1 :r °0 000
2.70 ;MIN. .,~t~~ 0 00o F~ EL.=738.78 PRECAST RISER SEGMENT o
7~ WITH FLAT TOP y~'i4q~ ??~~0`0 ~n~u?uuuuun?+?
' 'JUNCTION OLE ~ PRECAST RISER 4x4 0.8 W x 0.4 H H 4x4 NCTION " ~ BOX TYP SEGMENTS ~
60 5 BMP TRASH RACK BOX (TYP) a
" = 735.50 a. ° 1 STORM WSE (SEE DETAIL)
" 0"H X 1 4" SOLID GALV. - 24WX3 / SHEET. " OWN (SEE DETAIL THIS ) 1 DRAWD " TER TIGHT CONNECTION
- OLE WA 1 5 1/2 DIA. H "
PROVIDE SLUICE PROP. 36
EDW #2 IN lYR INV = 734 00 GATE FOR CL III RCP ' EMERGENCY DRAIN
~0 EDW #2 OUT 1YR
BOTTOM= 732.50 ~ d , ~ , / INV.- 732.40
30 . , ' ~ ~ 4 a' ~ \ PRECAST RISER •e. ' ' ' ' / 2.0 ~ ~ ~ SEGMENT WITH BASE
d ~ ~ \
20 • ~d. ~ ~ • ~ - + / / ' ~ ~ : ~ ° ° ' a CONC. ENCLOSURE
„ ~/~i ~ POUR IN BASE TO o 8 / ii. SHAPE BOTTOM TO
COUNTERACT a SLOPE INVERT ~
9~ TO OUTLET BUOYANCY N
• ALL JOINTS BETWEEN PRECAST o UCTURE NOTE ' OL STR ON CONTR TS SHALL BE
DETENTI RISER SEGMEN
~ QUNALENT MADE WATER TIGHT WITH BOX OR E JUNCTION DARD 4 x 4 STAN - INC BUTYL RUBBER 0 R p
5~~ 9 11 ~ RIVATELY OWNED AND MAINTAINED) Z (P GASKETS.
PER NORTH CAROLINA DOT
NOT TO SCALE
~levoe ~e~ais~j
i ¦¦J
. g U
EDW ~k2 - 2-YR HYDROGRAPH O
24"W X 30"H X 1 4" SOLID ~ / M METAL GRATING (GALV. STEEL) TO I
" STEEL PLATE BOLTED Q ~ p WELDED TO 1/4 SOLID STEEL PLATE WITH SILICONE Q s N
" " ING STRUCTURE (3 xt MAX. OPEN ) N o
U r ~M " ~ ~o SILICONE SEALANT Z ~ n
„ 18 3" " " AWDOWN HOLE ~ ~ x ~ ~ ° x
4 3 5 1 /2 1 STORM DR 7~~3 ~ Z~wp° ~
Zw a ~a~M
_ U W a~~~ Z z°N~ Z p Z Z i l O~pV I I
d e ~ ~Q~OnO V_ U _MM
24" vUi W~~~ ~ ?~~o~o ' ~ C l~i~MM Q U O~MM
am 3 NwOMOM ww U) .~-°w ~d.' a,

' e a a.
d'
RE FLOTATION CALCULATIONS RISER STRUCTU
~5~ EDW #2 IN 2yr RIS EDW #2 OUT 2yr I~~ „ " ~
R DISPLACED 3 3 IGHT OF WATE I. WE ~M
_ Q CONCRETE BASE Ah s
= 25.51 ft z -z _ (6.17 ft)(6.17 ft) (0.67 ft) EVATION ' a ~ ° a EL N O Q
p-
r , ! , . _ e ~ e.~ U ~ e~ ~t~.„I~-' - ~ ~ x Z Y ~ a
_ (4.83 ft)(4.83 ft) (6.39 ft) ~ ~ Q ~
i NJ JOCO = 149.07 ft3 z=oom U p~ m O mn
1/4" SOLID STEEL PLATE oC ~ ~z , I ~ ~ o I I
WHERE h = 10 YR. ELEV. -BMP INV, ~ TED TO STRUCTURE Q ~ p ~ M M Q f~!I w ~ ° BOL (~J ZZnn f" O Q~NN = 740.39 - 734.00 - x o w r...
M ~ p~ ao W oo~~ = 6.39 ft ~ ~ oQ~N ~JNN
Q Ih l+-w O N CD~~
TOTAL VOLUME DISPLACED = 25.51 + 149.07 = 174.58
. ' METAL GRATING (GALV. STEEL)
~~0 '9 ~I 2~0~ = 174.58 ft3 62.4 Ib = 14,162 ib ' ° "SOLID STEEL PLATE T OF WATER DISPLACED (1.3)( ) ~ WELDED TO 1/4 TOTAL WEIGH a , ft (3"x1" MAX. OPENING)
WHERE 1.3 =FACTOR OF SAFETY 1 N ~ 1 ~
~ie~u~ (u~aBe~) u. IGHT OF CONCRETE II. WE y _ ~ n
W 'ROW
CONCRETE BASE = A h VOL
EDW #2 -10-YR HYDROGRAPH 6.17 ft 6.17 ft 0.67 ft) 1
= 25.51 ft3
x
VOL MANHOLE WALLS [A (OUTSIDE WALL) - A INSIDE WALL)] H 34.83 - 4.04.0 8.39
=61.49ft3
VOL, CONCRETE PLACED IN BOTTOM OF MANHOLE SECTION
*0 VOL.=Ah Pm wo
= 0 ft ft) (2.0 ft) _ 32 3 NOTES-
- 32.00 ft3 ft RATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY 0 > J
3 1. ALTERNATIVE GE CAGE AT THE CONFIGURATIONS BMP POOL ELEV. IS LESS THAN 0.15 FPS.
GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE 4c TOTAL VOL. CONCRETE = 25.5 1 + 61.49 + 32 ft
00 3 RISER. 119.00 ft)150 lb) = 17,850 Ibs 2. THIS A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL z ui p. TOTAL WEIGHT OF CONCRETE = ( (HEIGHT > 5 :
s .00 = 1 19.00 ft THRU THE TAIL CAGE BE INSTALLED ON THE FRONT FACE OF THE CAGE.
CONCLUSION 14,162 lb < 17,850 lb 3. FOR LARGER CAGES (HE DE
EDW #2 IN 10yr cot THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. 1~ u. 0
EDW #2 OUT 10yr BMP RELEASE HOLE AND TRASH RACK DETAIL ui 0 0
S. >m N.T
1
CIO
0 m W
J
W
500 1000 1500 2000
Time (min) SHEET: D16OF D20

~ ~
F- ~ U U
U
= Z
U
Y J d
~ ATAT 4U~ w o~ ~
G N G 9. -SLOPE ASINOICAIED (Ni P1N15 ~ i Q10 = 2220 CFS d
~ _ _ _ ~ CONCRETE DIAIEN5ION5 ~C--.2 Y PIPE - _ - - - - = 11.36 FT SEC ~ U ° v10 / R N
- - WAl.I OUi IN FAIN 6~ ~ ~t~• Z o
_ _ _ - _ - - - - - T ~ ItIK. DIA GIA 11 A 8 C E F G W K AI 2 1/4 19 1 2' IS- 171_/1 20" N` B' 7 12° 1_ B` 1) Ip_ S~ N
1_I~2 _ 2]_ IB' 31_ 20- 11' B' 9' B" I 12 I I - - _ _ _ 1~ N ~ N
Y I I 1 CON( C Al JO' N' ]B'-_ 20' 30- B` 11" 4 B 11 -15 1' I-I"----}~ i 1 1 ( I I I I ° PN'F PIPE } 12 ~ J7" - }p' /S' 20" 1/" 12 15' 6' B' -B JI 18' ac g
4' aa' J6 52' ]1' 41 12 IfC 6' 8' 8' ~ 7?. wZ a
n C01( / 1 2 -Sir-- /2' S9' 31" IB' 12 21r-6' B B' J4' 2fi" - I I ~ OOWEI ! I { 1 ~ ~l ~ _ L.. i 66r S2 -T2 21 b' B 8' 34 29 I ( i 5 5B B
- _ I3 ~ - _ - u 5 12 65" .5a' - " 1 6' 8' B" 38' J}' - _ I - - ]2' 91 2' 2T - - 5
l _ ~ b' _ 72' 60' _ BD 36" 66 12 3D 8 _12 12 46 J6 F - ----------I------- FOUIIIIG _ B b 1/Y 79 66 B7 16 72' 12 33 8' V2 12 St a0T ,I. ry ~ \ li Z M - ~ ~ ~ s o
-•UPiIONAL COItSIRUl;IIUk JOINT _ _ - - ~ _ C~~~~T~~~~ (IF COIISf 101Nr USED) 7" B6' 12~ 9a' 36" 78' 12' ]b' B" 12' 11' SB' iS"
iL1..l<~ - - - J.11 x.1.1.1. i L11.1S 111 FR T VIEW _ ~ ~ ~ O ~ ~ o ao
\ _ ~ I _ ~ U ~ N>
DOWELS IN ENDWALL WITH REINFORCED CONCRETE PIPE REINFORCING G- I I I ~
,4 I PIPE SINGLC PIPE - OOUBIf PIPE- - -.1 U DiA 13 iB Z4' j0' 36 . -iB' 13 I~ 'ji ~0 j6' -41' -lfi ' "C" BAR 'D' BAR - , E I ~ N E I I / ~ ~ I \ a o
e• - - :k Y :Jf -Y :K::%. :X. :K. .A y :M, Y DIA - ~ - f / BAR c I]TJI`s _:x.:>i_ 'x' `>i` _ _ _ _ _ _ ko _ECr riD Ecl. - ~ I - ~ D Q / ~ ~ ~ LL ~
u Oirr~ - - - - 2 2 ~T 1 7 _2 _1 2 2 ? _ ~ll_ 12' 1. l 4 1 S 2 2 ] 3 1 a 5 1B' / 2'-]' / 2'-2' 1--- 20 -66 RCP ~ 0.50 DROP Z ~ a STOP = 7320
_ G OFY 2 2 _ _ TOf LBS 9 9 II N ~ f9 55 b5 ~ 11 I 19 i9 2j -77- ~~92. 21' 1 2'-9' 1 2'-B" d 0.50X W . ~ ~
~ 0 ~ Z
BOWEL BAR "X° DOWELS {N ENOWAIL WITH CORRUGATED METAL PIPE 1. SEC tu)Irs T)u 5EA No 2N 16© J6' / ]'-9' 1 ];-e' _ - _ ~ t PIPC SINGES PIPC - _ - OOUBIE PIPf • ~ (iFGARt11NC, Y F3AIfS 11• a 4'_J• a j 2' ~ I / W t0
0 ~11A t~ IB 2/' 70' 36 ~2' 1i1'•---1 1~ r14' JO J6' 4j` _aB 48' 1 4'-9' 1 B c 6uls '~''M' ~ 'll"x' ~li r Y K::K..%. Y 'r' r 2 CiJIIWAI I S > ae" RFFFR _ - _ - - I ' W Q ~ Z Y I
C flh 1 7 1 1 5 7 2 J ~.t ~ 4 J 111 Ni:UUI SIANf1AR(i F(IN 54 4 5'-]~ a 5'~-2' ~ I - ) 2 I I I 1 2 2 2 1 7 ~ I~ - I N _Oil_ - - _ _ Iullvrnll> Il(IU 60' 4 5'-9' / S'. B• i ,f - - - - ~ / O ~ ~ N
_ UIY 7 7~ ) 3 1 1 5_ _2 1 3 3 < 4 5_ _ 1(11 IDS 9 B 11 II 19 Sj 67 11 I f6 I-9 11 g5 PE 51AIF0 iIFSINf, 66' 4- 6'-J' 1 6'-2` _1,_-.-r-- / a Z Q C~
v / O J th
DIMENSIONS AND QUANTITIES 1` _ _ z ~ 1 --~`~--_USNIG•COtKR [PIPE _ USING COR- R~(D 1~EiN. PIPE ~ ~ TQ VI U ~ n O / Z C ~
- '~iIl~a IY I 1 II lf~6j ~ I~~ l'ONIAON DIUENSIONS SINGES yptlUBiE PIPE - r _ - - - TO VI W _ U N o / _
D 11 - B- G l l CU. YO N E CU_YD --11-- B _ -G _ L f.U YO _k L CU. YU - "I)" 13AR5 Al 12' ON CENTER _ BAR 12" 0 C -;5'- S' 1'-B' E•.9' I )/B 5' b' 0711 2'-2' 7'-B' 0974 T-U-1'-6' 1'-6' S' 0' 0.513 1 It1i''fi' 076(1 W 1~- "C' DAHS AT t1' ON CENTER d
1!}'~ 7-T P~iO 7`~j' ~2. ~ E'~1' 0958 I'~9' 8' it 1.271 ~1'~! i' 8' 2' II ' 10 01 j j'.j 9'~1' ~i 01/ _2+•- i•_~• j•_i' i'-o•21J2 e'go' iios j'=3' ii'=S joiB 9'~9'i'=ii 's'-~' '.a' ij !"b io' 1' i39t REwsloks_. ~.i
_ R VISIONS JD 1 -9 1 -S a'-7' 2 3j 9'-7" 1145 a_3 I!'_5' Y 920 a'-J' I; ,1' aT•5' 8'_IO t 751 )~9 12' 1' 2 )4B t70 DATE DESCRIPTION - s- c n E _ - 36' S'-3' 2'-B' S'-6' 3 11 0' ]OU) 5'-0' 1fi-n 1086 1 9 Z 5 5 2 1<J 4 2156 1'•6` U' IFI j18B I 5/99 DELETE SPIASII F40 kU7E S v~ E V _ a
NO DATE UESCRIPNDti - -c- ~ r~ - r- -r- - r--c - r•- ~ r _ - - /2 55=10 2-II 6-4 T1J312-8 at20 5-IOIB-6 55]1 5-) 2-B S' 11'11' IU 3710 S-.1`i1'-I 4111 '
i 7j00 AODEO NOTE 2 jB' 6r S' 3r~ ~T~-j' -T. la-+ 5515 6_B 11_•0 L127 5 _9 2'-11 fi _8` I! 1 ~l1 e':~o 19'_4' S_Bi3 APPROVED DATE _ ~ ~
/ ~ ~ ~~~~nnnnnuuruuq~
_ CONCRETE ENDWALL FOR CIInRLOTTF - M1?CKLENBi.frtG . ~ 00000 ~ ~~G/
(.rrnRl,oTTr ~1r,r.,rti.rNr3uRC WALL WITH SP aF)>41~NT ONCRETE W{NG , ) . , _ _ 1-,AND I)f..VhL C WITH SPLASH PAD fly R~- / o° °000 v°°° @t1ee~
1) n]',vr[,()I 1`ti.N1 SINGLE AND DOUBLE PIPE CULVERTS s1~.;;~ ,~E~. r,n N _ , 11 1. STAN~AI~DS 20.17A / / ~ ~ 0 °oN
s'rnNnn[~I)s 15 TI~RU 4D PIPE :~n.1 rIA J~ e c
~ - U uW N ~a ~ a°v~ O o° ~
y e~ 41:
~ % ~ °e veoe° ~ \
,,,~~~`III a`a`~~\\
~ mnnnnuun
d 0
GENERAL. ~IOTES•, GENERAL NOTES:
I
' TO BE CHAMFERED 1" 1. ALk- CORNERS E,
1, ALL CORNERS TO flE CHAMFERED 1" IF CONCRETE, ~ - SCALE: 1 "=10'
~ ~ -i CONTI~ACTOR WiLL BE. REQUIRED TO PLACE 2-#6 BARS "Y" IN THE TOE' fl E ' 1HE CONTRACTOR Will_ DE RF(}UIRED TO PLACE 2-#6 DARS _ #6 QARS Y IN THE TOP
OF ALL ENDWALLS FOR PIPE CULVERTS 4?" AND OVER WITH A MINIMUfd 3 2. )VER WITII A MItJIMUM 3"
TAN NDWAL.L. OF ALL ENDWALL FOR PIPE CULVERTS 42'~ AND OVER WITH A COVER AND A LENGTt{ OF 6 LESS Tt E
- COVER AfdO A LENGTH OF 6" LESS tHAN ENDWALL. -L, z 0
FORMS ARE TO BE USED FOR THE COr~STRUCTiON OF THE BOTTOM SLAD. 3. OF THE 80TTOM SI Af3. a v
FORMS ARE TO BE USED FOR THE CONSTRUCTION OF THE B~ WALL TFH(,KNES5 (T) SHOWN iS NOT TO BE INTERS RETED TO 3 4. RIP-RAP APRON DESIGN (PER CHAR/MECK STORMWATER DESIGN MANUAL): N W
MEAN THE THICKNESS ACCEPTABLE, 8UT IS t1SED OP1LY ~ T SI-TOWN IS NOT TO BE It~1TERPRETE-D TO T - TO 1. MINIMUM TAILWATER CONDITIONS, do = 66" = 5.5' ~ RPRE E_~
4. WALL. T4-Uta(NES.~ ( ) THEREFORE, 0.5 * do = 2.75'
IN COMPUTING ENDWALL {)UANTITlES. ' MEAN THE THICKNESS ACCEPTABLE, DUT IS USED ONLY ONLY 2. SINCE TW = 2.0', USE FIGURE 8-1 FOR MIN. TAILWATER CONDITIONS
IF CONTRACTOR ELECTS TO USE CONSTRUCTION JOINT AT BOffOM OF PIPE, 5 d
IN COMPUTING EtJDWALL QUANTITIES BAR "X" DOWELS) SHALL BE PLACED IN THE BASE AS ShIUWN ON f'IAN~. 3. BY FIGURE 8-1, THE APRON LENGTH, La, AND MEDIAN Z
( STONE SIZE, d50, ARE 30' AND 1.0', RESPECTIVELY. JO?I`!T AT DOTTOM OF PIPE,
SPACING OF BARS TO DE APPROXIMATELY 12" CENTERS UNLESS f.NGiNFER RA TOR F I.ECTS TO USE CONSTRUCTION JO":NT AT DO 5. IF CONT C 4. THE DOWNSTREAM APRON WIDTH EQUALS THE APRON LENGTH PLUS y
DIRECTS OTt-IFRWISE• ~ SEPARATELY, THE TOP Of E3ASE S! TALL B(. AND POURS DACE ~E S! TALL QE I Et~T ROUGI I THE PIPE DIAMETER: W = d + La = 5.5 + 30 = 35.5'
g 5. MAXIMUM RIPRAP DIAMETER IS 1.5 TIMES THE MEDIAN STONE SIZE:
6. iF CONTRACTOR ELECTS TO USE CONSTRUCTION JO{NT AT BOTTOM OF PIPE, MPRESSIVE STRENGTH. 6. ALL COPICRETE 1O BE. 3600 P.S.I CO STRENGTH. 1.5*d50=1.5*1.0=1.5'
AND FOURS BASE SEPARATELI', TI-IE TUP OF BASE SHALL Bf l E.FT ROUGI~I. , ~ 6. RIPRAP DEPTH = 1.5 (dmax) = 1.5 * 1.5 = 2.25 M
Q ao 0
7. ALL CONCRETE TO BE 3600 P.S.i COMPRE5SIVE STRENGTH. Q o ° N
R_EVISIOt15 _ U ° z W ~M
REVISIONS _ t10 DATE _ DESCRIPTION tut DATE DESCRIPTION I 8/00 REVISED-NOTES V ~ ~N
W-W, x Y x
~~zw ~ Z~7WO ~ nPPROVEO DATE w ~Z~~ ~ ZZ ~d~M a W ~cp CD
U W acW.9~in Z Z~N~
• - ~ : t~ IL1 ~G CRETE WING {I,LNE . P CON CONCRETE ENDWALL FOR (.riARLOr'iC 1`rLCI Z azl I O~ool I E WiNGWALL _ ~000o0 U) V U MM
CIIAI2LOT'1'L b9E?CICI,FNE3ElItG ~ ~ 0 1+•IENT _ LANll DLVLL P f N N Wpc~OC^D Z ~ J~woDOo
SINGLE AND DOUBLE PIPE CULVERTS D ND ItILN7 WITH SPLASH E,nND DrVFLOC' ST~INDA[2E)S ~~i. F-' r~ M QUO > M LASH PAD 20.17F3 QZ ~a~r. 3 ~ Ni?oo -7 ~ w.~ ~ W ~ D..ti
I)S 1~5" THRU 48" PIPE 2o.16D S`r ANDAR
A
~ °o A M
C Z o A k' ~ k' M
- - -
- - ~ E3 _a °a - - U
_i. ~ _ ~ U 1, U z~ WU x
C S~ ~ a a~ d 51_~_-_-... ~ J Li. J J L~
~ = J~~ C9WOc~0
_ _ _ - ~ ~ Z o ~ ~ of o ~ ~
a"o°~~ a NW~~ PIAN z c~,.,. 1- ~ d LL. N N
y~_ Op ~ ~ w W p v appdpp- o0
OaN~ ~JNN .r----
f-tAREO ENO SECTION OR END wall
u ~ J
1 a b ~'in.- 4 N ~
- I I-
0 a
6" GRAVEL ON FILLER FABRIC
1 ! 18' Illff18.IffIIATF RIP RAP um ui 0
SECTION A-A
0 PIPE 512E A 0 C D F F C^ Wl RIP RAP IN IUNS
- - - - - -1 4 1/22' 3' _ 6 W 110' 7' I I/2 M
ROASIMIS 12' 2'
n0 RAIC OESCRIP11011 21" 15 9'^ 2 1/2' 1 1/2' f' 7 4 1/2 -12 - 24" 17' 10' 2 1/2' 1 1/2' 1' 8 5 1/2' 15
- - 2- 2' 9' 6 22 0
36" 24' 16' 112' 2 2 - 9 1/2' 7' .3Af)['I?OVFD DATE
CHARLOTTE - NIECKLE,NDURG
DEVELOPMENT RIP RAP PLUNGE POOL s~~..._R~ LAND Dr r
STANDARDS I..
I 7c~ 2a =
PIPE SIZE A B C D E F G UJ (a) Z
66" 60' 40' 8 3/4' 5' 5' 23 3/4' 1 17 1 /2
cl) :D
m
Z J
W
J
J W
SHEET: D17 OF D20
File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/030010UT XREF: DRAINAGE PLAN STATE/03001BASE

755 755
~ ~
- ~ o
--=--11-11-III===11- III i- - 11= U U :I.I~ 1= Table 22 Wtntaad Pleura
750 - 750 ~ MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED; Z
1= seietla{I~ Novo Coromaroid Fmmddian WlieDlie Vs~e Noks U -
III= - 1. SEDIMENT FOREBAY 20% OF PERMANENT POOL AREA) co®aonN:ama F«1>a At' Talaaece " " Pelra"dre virglydn Et~gaa ye+ ap f4 t tt. High, Babas ate . Full sun to partial shade
PROP. RETAINING (=I WALL 2. HIGH MARSH 35% OF PERMANENT POOL AREA, 0 TO 9 DEEP) Artowetum ernes wooddtrcks w
_ S Uaria ladfalia Ettlergeat Yea uP W 1 ft. Maderue. Tubas and Aggressive caloaizer n88
745 , - - Artowheadf Duck seeds astern dndca ~ ~ 745 ~ ~p~~ viraaac>~t Pa>metar yes np to 3 m. High. S~gbads and Tolaaot of flucdtating water ~ °
EX. GRADE ~ ~ - / / / / / / / B~~ btsswxn. Winter food. levels Ar partial shrk ~
I_ ~ II: sad raver Z C
ICI 3. LOW MARSH 35% OF PERMANENT POOL AREA 9" TO 18" DEEP a~g~~ Emelgenc yes uptolR Itequiresfuusun. N B B N
' i 11- + + + + + T yes m t R Law. Fxrept s>s Dover ASK. May eliminate ~ Yp~ tPP• op Urt Q
740 - _ + + + + + Catuil Odra spaies. Volumeer. ~ - 740 + + + + + ttatmertt. w z
' _ II III. - ~ 50-YR WSE W 5 t [ow food value. Hood. Free floating SAV. Shade Z CertuophyDaasD Qenwr ubmrlgtn 3'a Y~ ~
i-i I- _ =1. , I ~ ~ 2-YR WSE Q ~ =1 I I 111= 4. MICROPOOL 10% OF PERMANENT POOL AREA cooataa habimtaadsbdtafa toietarn. ttapidgrowth. 5 ~ fish sad m ertebntes
- II ( _ Scirpas pwge"s Ernageat yes up to 6 in. High Seeds, cover. Fast caiottiaer. Can tolerate iL
- ~ = o 1= ' I I I- _I III Comma? Tbroe,Square Waratowb songbirds paiada of dryness. Frill = o sus Hi maul removal. ¦ ~ U S
metal removal ~ ~ M ~ 735 Lannaspp. SnbmetgeoN Yea yes Ltrgh,Foodtor tt>~ o ~ o
735 = 1 ws ~ - ~ _ - i = II - Dnrirwad t watetFowl. and fuh = 1 ~ w
_ ~ ' 1= PERMANENT WSE 732.00 _ - _I -III II_ II. 5as+runAr cenuwt Fasergatt yes w to t R tow, except for wood Rapid growth Shade V Lizard's Tail ducks rolaant. ~ ~ r` ~
_ ~ I-- I I I=1 I_ - i - - 731.50 - - - - - - - - Hibiscus ataucheraos Emergent yea oP to 3 is Low. Natar. Pull sun. Can rolerae ~ ~ ~
- ~ - - - _ _ _ _I I=1 - =III .i I I_I i - - - I I _I I _I - I - I Mash Hibiscus 'odic p Poarederia cordara Eaoergeat yes up to 1 R Moderate. Ducks. Full sun m partial shade Q Q .nr °
Pidcaalweed Naar fa buttafltes. Z
730 _ T ~ PROP. GRADE _ _ 730 lli Rettwves Porantogeron patrnams Subtargerrt yes yes Eanamely gh ~ W p~ Wend Waterfowl, mtnh and > ~
I- shasebisids. Q Z
III ~ ~ ~ -I Cartier otytadu Emergcat yes oP Oo 3 ia. High Food and Cava. Full sun although taierant of ~ shade. Provides some W
_ - - _ ~ -II--- >za w Q ~ z
~ - _ _ III=1 I I-I I-I 0 N
725 725 shore(me stabilization Z Q ~ Carcz tpp. Emergent yes up to 3 in. High, Waterfowl sad Many wedad sad seven{ w a,
birds. n o f M o m
Scirpus validrs Emergent yes np to 1 ft. Moderrue. Good Dover ruts atm. Aggressive weedy V ~ C Q N ~ u
Soft•srem Bullush and toad. alien snd? v P. oHetum ? U N v Fasrgeat yes np a 1 R High. Waterfowl, Feu coionuer. Tolerant of Poiygoontsm sPP•
SCALE: HOR. 1 "=20' Smutweat songbirds. Sends sad Ong water lauds. a ~
VER. 1 "=5" raves. _ ~ hrrserst sears Emergent yes uP w 1 R Moderate. Tolaata wa or dry ~
- 755 SoR~
755 N hsrwrt t yes up to 3 R Moderate [or toad tau Fast atlaoiaa. Tolamt of I ~ ~ ~ fa' Dover. water kvela.
/ 5 lu / PaAiaat vergaw"t Perime0er yes up to 3 iu. High. 9etds, raver fat Toletata wa sad dry
/ / Switdrgtsss waterfowl and caaditiow. / ~ bads. ```,pnuuuuuturrqurrr//i
i ~ Acarar calmness Perimera yes uP to 3 is Low. Tolasmt of dry periods. Not ) ,q~i~,,
- / - $vrat FJag a rapid calooiza. Tolerates oouaoneooo
750 - - 750 moo „oe e,~ ; ~ I=1 I I Low. Goodwataoaygrararor. o°? p °artjl - t- lrlodeu Cmwdensss Submergmrt Yes yes ? D; ~ ~1'`~,Jo
i - I=~ ~ Wetenveed High rttrttiata, Dapper, = Q oy n z'
~ - ~ mrmgturoae std c~omium U stn 'fir e~ _ ° -I ~ III- 0 - ~ / - lEil>DVII 01Y O ~p 0~` `
SCALE: HOR.1"=50' _ - - - - (I I- Valimeria maeAcara Submagent yes yea High. Food for Tolerant of smoky water end . ~ o
VER. 1 "=5" _ - - - ~ watesfowi. Habitat for hi nuviaat loads. ~ o Doe ~ . WddCelay ~ ~ ~ - - fish and invettebntes. ii~4Oj~ oo ~
745 745 ~ lfamrta agwadra Enntgeat yes up to 1 R High. Fold fat birds. Praiser full Am q~4irgpr tpu~~~``,~
pQ ~ Wfki ~ unmanu
EX. GRADE _ Tabk 6o>le Jot WetLmda Svattans• ssddelina ior~pg diverse sad affative stormwoter wedmda io the tnsd•At -I ~ Sdrnda w
- - ~ r- 'S' -I I a
- I~ ° - PLANTING WILL BE SELECTED FROM PLANTS IJSTED IN TABLE 2.2 ABOVE (SOURCE, STORMWATER
740 - - 740 BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND
~ 50-YR WSE = 738.15 III= AVAILABIIJTY.
- - ' I -
! I _ _ _ 2-YR"WSE = 736.38 - I- , , _ ...-s,,. =1~ _ ~ ~ _
ri - ~ ~ I-1 ~ - - Use of Eristint? Hvtlrlc Soil
735 = _ = 735 =III-
-~I~' -11 - ~ - F ~ i - PERMANENT WSE = 732.00 - Soil from the existing wetland areas that have permittai for impacts Will be strkpptxl and stored as
i T- -III- - feasible for uutiliaation in lining the prolwsod wetland site. Other' topsoil adjacent to the wetlaath
- - - - ~ ~ r 731.50 - - - - - - - 731.50 III= may also be sutilrable. Using these exiatntg soils should hasten rho development of vegetated. cover
- - - ~ , ~ -I - _ - - - = I I=1 11= =1 1= 1= I =11=1 I I=1 I =1 I I- - _ _ -I I- I I I I I I I .IiI_II -iii-i~= _ _ _ - _ _ _ -iii-iii- i-iii-iii-iii-iii-iii-iii - _ _ _ _ _ 1= - ~ sad hyuiric soil conditions. 'Chit is also tun extxllfsdt use of as impattalrt natual resource. Many of
730 - - 730 tl~ row planted species wtnmtiy exist in the vicinity ~ the area to be utilized for this
729.00 = PROP. GRADE i - function. The majority of rho f:pocies in the utuetlands include Obligate (O$L) and Faa>iltative Wet Z II_ o
=III=-==-=====11= _ - (FACVV) vegetation. HerbaoocAts plan specim ptu~at itrclade Sofitush (iutxius effusus), sedge F
- _ = I =1 I =1 11= 1=1 11= I = I.11= =1 I_I l i l i l I I i 11= (Carex app.), Dock potato (Sagitatia laxifolia, Arnow arum (]}Ilitaadra virgana), Common Threo~ N - - - - - - - - I w
_ _ - - - - - , Square (Scirpus plmgens), Ttwch-mo~not (larpstie~as capensis), Smattweed fTolygonum app.), and °
11=1 11=1 11=1 11=1 11=1 11=1 11=1 725 =1 I I=1 I I=1 i =1 I I=1 I I=1 11= I I=1 I I=1 txilers. Sulppletneutal pltuntiaga will be fielected from Table II.2 m the Storm water Best 725
Mauaganoat Fractices, NCDENR, April,1999 on at~utai field txmdititms, if required. Being
that the site is in the vicinity of odtor wetlands and floodplain areas it is expected that the area will
. It is that h~baceaus and scntblshrub ° benefit from the natural seed seurcfx avat'>alble expoctod Z
wedaetd spexies will rapidly voluratota~ in the area.
SCALE: HOR. 1 "=20' entZatreSchedrtk-ifrmtrlnd N
VER. 1 "=5"
N g ~otenicat Nauae Common Name Size utg$ U
O
~ ~ ~ ~ R
~ ~ / ~ , r ~ _ ~ , \ ~ , 00 0
- ~ ; Juntafss ell'vsos Snl~h Noodle Rush 2 yr. peat pot 3 O/C. 0 0 , ameticenus Common Three Hare 2 3' aC.
' / '-1 \ 0.1 LINE ~ / ~ ~ ~P S9 yr• P~ 1~ o Awns calamus sweet Flt 2 3' ere. U ~ t; Yr~ 1~ Pa z t- w o 0
i ~ ~ / ~ ~ V N N N ~ ,O
i _ ~ ~ 2g - W I_- W ~ X ~ F- 40 X ow water Plani~ -j = 3 a Z Z w o a
/ ~ ' ~ ~ / i ~ ~ z w w Z5 o w
~ ~ w ~Z~~ aZ ~a~M 1 ~ ~In ~ W tr cp cD Polrandta vtrgwcs Arrow Arum 2 yr. peat pat 3 41C. U a w ~ ~ Z Z o ~ ~ W ZOtnN J°N1~
R Sagttana laUfoha Duck Potato 2 yr. peat pot 3 OTC. Z a a z ~ t o~ o o t ~ 2v ' - _ ~ ~ Q ~QChocho to U U _MM
~ ~ ~ _ _ 2$ 7 RIP RAP APRON FINE STO ~ ~ ~ ~ NE , ~ - Saluettus cemns Lizards Ta11 2 pot 3 0lC. ~ w ~ - z - ~ 13 - - n ~ o ~ ~ z 1 ~ ~ ~ Pa Ii~MM OZMM
' i~ ~ ~ , ~ D 32 - 1 , - N lnteum S tterdnck 2 yr. peat pot 3' aC. o w Q ~ J ` 32 i f`r~ ~ N 00 Q W
WIDTH AT PIPE - 4.50 , \ P shall be in naturalistic l random cl s to enoour a diversi . S ecific Iatlt s sales, lantm8 ~P ~ h' P P P
WIDTH AT END = 10.5 - 34 1 r ~ 34 1 , ` quantities, and size, which will be utilized for the mitigation sites will be dependent on availability,
LENGTH = 9 , ~ - ~ ~ ~ 1' co time of 'ear in which plan' occurs. Co~rol struchtres such as setiimentatian tra s, st, y rang p
_ ' ~ ~ ~ ~ DEPTH - 9 ~ ~ - 3 - 36 \ 't sihaiion tamers, ancUor at minimum silt fence will be utilized as necessary. 1 ,
1 1
i / ~ . - ~ ~ ~ ~ ~ r i ~ ' / RIP RAP APRON MED. STONE , ~ 3eetEGr: Sneaflaetton foS,l1, gba~xo~s sad Coves Glraa ix HreitandMisfeatien, Sites
~ i z r o ° . \ ~ o WIDTH AT PIPE = 10.5 M
r~ i - ~ / ~ ~ _ ~ 1- r on kM ~M WIDTH At END - 31.5
` ; / ~ ~r~y RQ1p ~ ~ a • \ .Z
i ~ ~ ~ ~ o ` ~ - ~ ~ ~ ~ / 1 LENGTH = 28 ~ Q ~ ~ Z ~ G7 c~ a " 1-Jut. 15 Red.T Glraes 7 tbelacre tttttt~ H ~ - o °
- ~ ~ 3 - - DEPTH 18 U Smartweed 20 lbs /acre ~ ~ x Z Y ~ X
/ , / ~ i~ / / / ' ~ ` a a ~~r~a JN~
/ ~ / ~ ~ JuL 16- 1 Te C = ~~o~ ~ ~°O ~ roP ~'-'=wm Z-oca
_ i / ~ i / ~ i ~ i / / ~ ~ i 3a 36 Jap. Mrllet or Sorghum 20 lbw lacrr ~ o rn m ~ o = ~ ~ ~ ~ H Z ~ J
- - 1 1 4 ~ 73 ~ ~ ~ \ Y . . (t0 be fOIlowed ~ peim'dnent m1XtlrTe) Q ~VJ p ~ n h Q a ~ oo oo ~ - ~ \ ~ ZZ~~ ~ ~ Qr+-NN
$ - 2 - Nw. l Smartweod 20 lbs lane ~ o ~ 0 0
~d \ ~ Red Trap Ctre1SS 7 Ibslaae ~ M w~~ ~ N m
~ ~ ~ ~ ~ ~ ~ 1. , y~ ~j
,^~i ~ , Nov. lMarch 31 T 401bsl8cte ~'1 ~mrS' ~P ,
- ~ ~ 1 Wheat or Wittier o - . ,
`e,~ n _ _ ~ . . . ~ lrnl~.fi~llnne.tlKr,...,,,n.,aik,..;.r1„rn\
/ V , ~ _ \W W aVYVnW VJ ~IWLWWYL yl
The following species may be substituted:
. WETLAND A A' A r ` J - Btdens connataa (Beggar's Tick) and other 13tdea s speaes
JO REMAIN - / r - - Lee = oryzoides (Rice Wpm) - Panicaun vinatum Swi
74
NDISTU•RBE 11 • r li -Peltandravirgittica(Arrow Arnm) J
it tng Ins ctions
r r , 1
74 q1, lilt 1 Seed in the dry period
1 2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage whets
r. broadeasting
/ / 0 \ \ 1 \ 730 , 3 tree and shrub should be completed first before ) Pig seeding - 4 Pure live seed shall be specified and raved rior to
_ ) app P Plantm&
- I 734 'l J o - - ~ _ ~ Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100
736 I / n stems per square meter upon germination. Substitutions may be permitted with approval. Other W
- o - native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
738 I / , r v vv t 1 i + / , 0 0 es shall be uWL d for stabilization on surrounding slopes within Miti 'am Area rather than
73 o o - perennials to allow natural succession. If apetennial is required for erosion control than a nnndatre
shall be selected that allows natural volunteering to occur. -
50 DU CN4
13
73 8 6 738 13
/
r 7 _ - 752 H
r , 4 It
~ ~ ~ I I I r ~ / 1 , \ I 1 I , / / , /
1 1 \ I I r / / ----75 - Ui :CDC
756
" - Z
7 W
I I 1 i PLAN VIEW
..z / ,
` \ it , f/ 1 1 1 ~
a` 756 i~ W
SCALE: 1"=20'
File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SEC XREF: DRAINAGE PLAN STATE/03001BASE SHEET-D18 OF D20

WE
775
770
765
760
755
750
745
740
735
730
725
MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED:
1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA)
2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP)
3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP)
+++++
+ + + + + +
4. MICROPOOL (10% OF PERMANENT POOL AREA)
EXTENDED DETENTION WETLAND #3
SECTION E -E
SCALE: HOR. 1"=50'
VER. 1 "=5"
NOTE: EXTENDED DETENTION WETLANDS
TO BE PRIVATELY OWNED AND MAINTAINED
X17\\//' , l,' I\ /,_= - _ _ --,-• L
/7
io
775
770
765
o f
755
750
745
740
735
PLANTING PLAN
Table 2.2 Wetland Plants
sekavie Nave
ComoerrW
inundation
IT
NOW
Caaamn Name
Form
Availlabi
Tolerance
High, Waterfowl and
Many wedaad and several
Pelondm Ili ft da
Emergent
- III
up to 1 ft.
Higb. Bermes we.
Full sea to partial shade
Arrow atom
Emergent
yes
up to 1 ft.
eaten by wood ducks
Full sum. Aggressive weedy
Saggimria lefbtia
Emergent
yes
up to i ft.
Moderate. Tubers and
Aggresaive colonizer
Arrowhead/ Duck potato
Emergent
yes
up to t ft.
seeds eaten ducks
Fast colonizer. Tolerant of
Andnvpogon Wrginkus
Perimeter
yes
rap to 3 in.
High. Songbirds and
Tolerant of flucnwting water
Broomsedse
Emergent
yea
up to i ft.
browsers. W rater food
levels 6t partial shade
Soft Rush
/f1F
1 1 1
and cover
conditions.
And-pogon gloere»aars
Emergent
yes
up to t ft
Moderate for food but
Requires full sun .
Bushy Beardysas
hixh for cover.
flucauging water levels.
Typha app•
Emersew
yes
-
Low. Except as cover
Aggressive. May eliminate
Canal
waterfowl and
other species. Volunteer.
sero
Ifigh treatment.
Cemrophyaum DWQersmn
Submergent
yes
yes
Low food value. Good.
Frec floating SAV. Shade
Cootuaii
/-ITIj
tolerant. Rapid growth.
fish and invertebrates
acidic conditions
scirpus pungens
Emergent
�
up to 6 ire.
High• Seeds, cover.
Fast colonizer. Con tolerate
Common illus Squame
Waterfowl, songbirds
EX. GRADE
sun. Ifigh metal removal.
(,arura.rpp.
Submergent/
yes
yes
High, Food for
high metal removal
Duckweed
waterfowl, and f set
hi starriest load&
Saunt»rs cemil
Emergent
yes
up to 1 R
Low, except for wood
Rapid growth. Shade
Lizard's Tail
Emergent
yes
up to 1 ft.
docks
tolerant
HF
1=
Emergent
yes
up to 3 in.
Low. Nectar.
I
Marsh Hibiscus
penodic dryness
Pontederia cordata
Emergent
yes
up to 1 R.
Moderate. Ducks.
Full sun to partial shade
Pickerety eed
f
o IF
Nectar for butterflies.
Poramogero" peakwul s
C �I
yes
yes
Extremely high.
Removes heavy metes.
Pond Weed
Waterfowl, harsh and
shorebirds.
L"rsia onwides
Emergent
yes
up to 3 in.
High. Food sad cover.
Full sun although tolerant of
Rice cutgrass
shade. Provides some
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MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED:
1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA)
2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP)
3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP)
+++++
+ + + + + +
4. MICROPOOL (10% OF PERMANENT POOL AREA)
EXTENDED DETENTION WETLAND #3
SECTION E -E
SCALE: HOR. 1"=50'
VER. 1 "=5"
NOTE: EXTENDED DETENTION WETLANDS
TO BE PRIVATELY OWNED AND MAINTAINED
X17\\//' , l,' I\ /,_= - _ _ --,-• L
/7
io
775
770
765
o f
755
750
745
740
735
PLANTING PLAN
Table 2.2 Wetland Plants
sekavie Nave
ComoerrW
inundation
Will Vdee
NOW
Caaamn Name
Form
Availlabi
Tolerance
High, Waterfowl and
Many wedaad and several
Pelondm Ili ft da
Emergent
yes
up to 1 ft.
Higb. Bermes we.
Full sea to partial shade
Arrow atom
Emergent
yes
up to 1 ft.
eaten by wood ducks
Full sum. Aggressive weedy
Saggimria lefbtia
Emergent
yes
up to i ft.
Moderate. Tubers and
Aggresaive colonizer
Arrowhead/ Duck potato
Emergent
yes
up to t ft.
seeds eaten ducks
Fast colonizer. Tolerant of
Andnvpogon Wrginkus
Perimeter
yes
rap to 3 in.
High. Songbirds and
Tolerant of flucnwting water
Broomsedse
Emergent
yea
up to i ft.
browsers. W rater food
levels 6t partial shade
Soft Rush
\
1 1 1
and cover
conditions.
And-pogon gloere»aars
Emergent
yes
up to t ft
Moderate for food but
Requires full sun .
Bushy Beardysas
hixh for cover.
flucauging water levels.
Typha app•
Emersew
yes
up to 9 ft.
Low. Except as cover
Aggressive. May eliminate
Canal
waterfowl and
other species. Volunteer.
sero
Ifigh treatment.
Cemrophyaum DWQersmn
Submergent
yes
yes
Low food value. Good.
Frec floating SAV. Shade
Cootuaii
habitat and shelter for
tolerant. Rapid growth.
fish and invertebrates
acidic conditions
scirpus pungens
Emergent
yes
up to 6 ire.
High• Seeds, cover.
Fast colonizer. Con tolerate
Common illus Squame
Waterfowl, songbirds
periods of dryness. Full
sun. Ifigh metal removal.
(,arura.rpp.
Submergent/
yes
yes
High, Food for
high metal removal
Duckweed
waterfowl, and f set
hi starriest load&
Saunt»rs cemil
Emergent
yes
up to 1 R
Low, except for wood
Rapid growth. Shade
Lizard's Tail
Emergent
yes
up to 1 ft.
docks
tolerant
Hibis l yrs nuoschewos
Emergent
yes
up to 3 in.
Low. Nectar.
Full sun. Can tolense
Marsh Hibiscus
penodic dryness
Pontederia cordata
Emergent
yes
up to 1 R.
Moderate. Ducks.
Full sun to partial shade
Pickerety eed
Nectar for butterflies.
Poramogero" peakwul s
Submergent
yes
yes
Extremely high.
Removes heavy metes.
Pond Weed
Waterfowl, harsh and
shorebirds.
L"rsia onwides
Emergent
yes
up to 3 in.
High. Food sad cover.
Full sun although tolerant of
Rice cutgrass
shade. Provides some
730 PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER
BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND
AVAILABILITY.
725
�5
.--_-_----�a'
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Carex app.
Emergent
yes
up to 3 in.
High, Waterfowl and
Many wedaad and several
Sedges
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songbirds.
n ate
Seirpus miklus
Emergent
yes
up to 1 ft.
Moderate. Good cover
Full sum. Aggressive weedy
Soft -stem Buhush
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and food.
aliens wet as P. per6plistuin
Polygonntm spp.
Emergent
yes
up to t ft.
High. Watedol
Fast colonizer. Tolerant of
Swartwood
/ /'- '.
\ \ I ,,
�' /,' / �'
/ `_�\\ ..� —. �. •y.
songbirds. Seeds and
cover,
flacAntittg water levels.
luncus effaw
Emergent
yea
up to i ft.
Moderate.
Tolerates wet or dry
Soft Rush
\
1 1 1
conditions.
Nuphar ►meant
Emergent
yes
up to 3 ft.
Moderate for food but
Fast colonizer. Tolerant of
S
hixh for cover.
flucauging water levels.
Pankmn vergasum
Perimeter
yes
up to 3 in.
High. Sods. cover for
Tolerates wet and dry
Swbcbpm
waterfowl and
conditions.
sero
Aconrs ciskin rs
pers:noeter
yes
up to 3 in.
Low.
Tolerant of dry periods. Not
Sweet Flag
a r aid colonizer. Tolerates
acidic conditions
Eloden c anadensis
Stitbmagent
yes
Yes
Low.
ami water oxygenator.
Watetweed
Argh mttrient, copper,
manganese and cbromium
removal.
Vaunwria wwrkmar
Sulnrrergerrc
Yes
Yes
High. Food for
Tolerant of murky water and
Wild Celery
waterfowl. Habitat for
hi starriest load&
fish and invertebrates.
Zirartia agaatiar
Emergent
yes
up to 1 ft.
High. Food for birds.
Prefers full sun.
Wild Ria
Table w
schueder
730 PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER
BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND
AVAILABILITY.
725
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PLAN VIEW
SCALE: 1"=50'
Use of Faistine Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands
may also be suitable. Using these =nWg soils should hasten the development of vegetated, cover
and hydric soil cations. This is also an awella t use of an imiVortarmt natural resource. Many of
the recommended planted species canw y midst in the vicinity of the arca to be utilized for this
finction. The majority of the species in dw.wetlands imrcludc Obligate (OBL) and Facultative Wet
(FACW) vallptanion. Herbaceous plant spedes preI include Sol (Juncus effusus), sedge
(Carat spp.), Dude potato (Sagitaria latiifolia, Arrow arum (Peltandra virgin a), Common Three -
Square (Scirpus pungens), Touch-me-not (impatiens capausis), Smartweed (Polygonum sPp-), and
others. Supplm ental plantings will be selesdod from Table 11.2 in the Storm water Best
Management Prances, NCD04k April, 1999 based on actual field conditions, if required. Being
that the site is in *e vicinity of other wetlands and floodplain areas it is expected that the area will
bent from the natural seed sources available. It is a gxcted that herbaceous and scrub/shrub
wetland species will rapidly volunteer in the area.
Event IM &kedak - i%r�u d
Ngweal Same „ Coin A me sin Notes
Rusbes/Sedm*
Juncits etiusus Smooth Noodle Rush 2 yr. peat pot 3' O/C.
Scup, asmericamuus Common Three Square 2 yr. peat pot 3' O/C.
Acoria calamus Sweet Flag 2 yr. peat pot 3' O/C.
Shallow Water Plants
Peltmira virginica Arrow Arum 2 yr. peat pot 3' O/C.
Sagitaria latifolia Dude Potato 2 yr. peat pot 3' OIC.
Saumnms cemns Lizard's Tail 2 yr. peat pot 3' O/C.
Nupbar luteum Spattemdoek 2 yr. peat pot 3' O/C.
Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species,
quantities, and size, which will be utilized for the mitigation sites will be dependent on availability,
cost, gime of year in which planting occurs. Control structures such as sedimentation traps,
siltation barriers, and/or at minimum silt fence will be utilized as necessary.
Sesa&tg Sbeczficafion for Habaerons and Cover• G}Ion lit Welland ell 0it .Inca
Tont 1- Wetland argils in term maril_v aabtrated sails orWt�t totit cggtonxl and brief immdation
Dates IT= AMR
Apnl 1- Jul. 15 Rded.Top Grass 7 lbs/aere
Smartweed 20 lbs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 Ibs /Acre
(to be followed by permanent ruubd=)
Sept 2 - Nov. 1 Smartweed 20 111 I=ee
Red Top Grass 7lbs/acre
Nov. 1- March 31 Temporary Crop 40 ft lacre
What or Winter Rye
(to be followed by permanent mmtmro)
The following species may be snbsrittftd:
- olden c onnata (Beggar's Tick) and other BideWs species
- L== orywides (Rice Cutgraw)
- Pawcam viratum (Switchgrax)
- Peltandra virgiaica (Arr)w Arum)
Seed'mae Instructions
1) Seed in the dry period
2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when
broadcasting
3) tree and shrub planting should be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100
stems per square meter upon germination. Substitutions may be permitted' with approval. Other
native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
grassers shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than
perennials to allow natural succession. If a 'perenniai is required for erosion control than a mixture
shall be selected that allows natural volunteering to occur.
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Use of Faistine Hydric Soil
Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as
feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands
may also be suitable. Using these =nWg soils should hasten the development of vegetated, cover
and hydric soil cations. This is also an awella t use of an imiVortarmt natural resource. Many of
the recommended planted species canw y midst in the vicinity of the arca to be utilized for this
finction. The majority of the species in dw.wetlands imrcludc Obligate (OBL) and Facultative Wet
(FACW) vallptanion. Herbaceous plant spedes preI include Sol (Juncus effusus), sedge
(Carat spp.), Dude potato (Sagitaria latiifolia, Arrow arum (Peltandra virgin a), Common Three -
Square (Scirpus pungens), Touch-me-not (impatiens capausis), Smartweed (Polygonum sPp-), and
others. Supplm ental plantings will be selesdod from Table 11.2 in the Storm water Best
Management Prances, NCD04k April, 1999 based on actual field conditions, if required. Being
that the site is in *e vicinity of other wetlands and floodplain areas it is expected that the area will
bent from the natural seed sources available. It is a gxcted that herbaceous and scrub/shrub
wetland species will rapidly volunteer in the area.
Event IM &kedak - i%r�u d
Ngweal Same „ Coin A me sin Notes
Rusbes/Sedm*
Juncits etiusus Smooth Noodle Rush 2 yr. peat pot 3' O/C.
Scup, asmericamuus Common Three Square 2 yr. peat pot 3' O/C.
Acoria calamus Sweet Flag 2 yr. peat pot 3' O/C.
Shallow Water Plants
Peltmira virginica Arrow Arum 2 yr. peat pot 3' O/C.
Sagitaria latifolia Dude Potato 2 yr. peat pot 3' OIC.
Saumnms cemns Lizard's Tail 2 yr. peat pot 3' O/C.
Nupbar luteum Spattemdoek 2 yr. peat pot 3' O/C.
Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species,
quantities, and size, which will be utilized for the mitigation sites will be dependent on availability,
cost, gime of year in which planting occurs. Control structures such as sedimentation traps,
siltation barriers, and/or at minimum silt fence will be utilized as necessary.
Sesa&tg Sbeczficafion for Habaerons and Cover• G}Ion lit Welland ell 0it .Inca
Tont 1- Wetland argils in term maril_v aabtrated sails orWt�t totit cggtonxl and brief immdation
Dates IT= AMR
Apnl 1- Jul. 15 Rded.Top Grass 7 lbs/aere
Smartweed 20 lbs /acre
Jul. 16 - Sept. 1 Temporary Crop
Jap. Millet or Sorghum 20 Ibs /Acre
(to be followed by permanent ruubd=)
Sept 2 - Nov. 1 Smartweed 20 111 I=ee
Red Top Grass 7lbs/acre
Nov. 1- March 31 Temporary Crop 40 ft lacre
What or Winter Rye
(to be followed by permanent mmtmro)
The following species may be snbsrittftd:
- olden c onnata (Beggar's Tick) and other BideWs species
- L== orywides (Rice Cutgraw)
- Pawcam viratum (Switchgrax)
- Peltandra virgiaica (Arr)w Arum)
Seed'mae Instructions
1) Seed in the dry period
2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when
broadcasting
3) tree and shrub planting should be completed first before seeding
4) Pure live seed shall be specified and approved prior to planting.
Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100
stems per square meter upon germination. Substitutions may be permitted' with approval. Other
native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual
grassers shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than
perennials to allow natural succession. If a 'perenniai is required for erosion control than a mixture
shall be selected that allows natural volunteering to occur.
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SHEET:D19 OF D20

1. Enter Site Data Here 2. Assign Project Areas Here DEVELOPMENT PERFORMANCE ANALYSIS ~ ~
0 ated with a specific set of BMPs Walter L. Philli s, Inc. U U P
"Site Data" and "BMPs" worksheets require user inputs. Assign project area to specific land uses in drainage areas (DA) associated with a spe assigned" category equal 0. Northlake Villa e U
" r MP" re uires user in ut if the site has a BMP not listed on the "BMPs" sheet Hint: Assign land area to the Drainage Areas until all entries in the "Unassigned" cote+, Use B g = z U
r ;~-#3il~le ~ ~ indicate user input fields. „ Proposed, Land Usel Cover Data by DA
Model resuits are summarized in the Model Output worksheet. Project Unassigned Drains a Art Y Draina a Areas DA associated with BMP sets. Land Use Summary
: ; , Areas ftz Area ftz DA1 t W DA1 DAZ DA3 DA4 DA5 DA6 ~
;>~pnerai #pf~rmattoln Pervious Areas Total Site Area (acres) 125.72 a . , - Pre-development impervious percentage 1.0% ~ U o
. f4 m Wit, , . I p .x :r ~ Row Cro 0 0 - • - Post-develo ment im ervious rcenta a 75A% ~ ~p P P Pe g 0 V'
~:~hme~f ~ ect: - ,4 ~ pa~ure 0 0 _ - ~ Z O
" 360 725 0 ~ , ~ >Forest , .;r.#~fomeson tic3 , , , ~ 0 36tl N ,7~ Annual Hydrology Summary N
ti;-~ M -gimme l mt~ r ~ y„ < ~ z ~ a 47,659 nt>?~weit~d. refs weaand , . L~ ' ~ 4T659'~' Existing Design Design It>• N
s _ r. ;iY, 7~ t! SJ . , . p, . , . 4 . , , GaWn' 24,373: 0 :59,874 v~ Landuse without BMPs with BMPs tZ 5tl. ~4 . ~ ; W Z
S cu 5 4. 363 9 =DeVebpiili~lnt : iE~ ~e~ ,j ~ Annual Surtace Runoff (inchestyr) 2.32 28.84 20.21 - Z
BMP nfi orations are bein tested Im rvious Areas Use Scenano Name when multiple co g g Annual Infiltration (inchestyr) 10.66 2.28 10.90 ~ S
for a given project. Save each scenario as a separate file. Residential 8 i.i ht Industria!
ROOftio 0 0 .y 1. .e ~-year, 24•hour Storm Event Runoff Volume Summary = M
olo is Grou s P+arcent of Site At"ea ' = Dfir~ra & Par(d Lots 0 0 ; «.,;~~I Hydr g p ( 1 . . - - Site located in a zone other than Rural or Transitional tone ¦ N U o _ ~ ~ s o0 N _ _ O ~ o
(~t~M`I~i ua Area 0 0 Gtau A 10. _ Storm Runoff Volume Storm Event Runoff Volume acre-ft 2 ! ~0D
Grou . ; - ~s_ ~F 3ldewalk .0 0 12.00 U N>
: ~ • ~r, ' Commercial & Hea Mdustrial . ~ ~ 10.00 Exlshng Landuse 0.582 ~
. . 'i~aoffo 960,455 0 'ice' 75' ~3 ~ 'tl93 Desi n without BMPs 10.006 N J M a 75 131,7'73, 398,714 ,:~9tl`, 8.00 g O $ ~ Q ^ o
Check on Soll Group Sums Totals OK Pitrkin Lbt 2,847187 0 ::320' ; 2# , 32tl2~ 2d7 1' ;T78~ `:838,189. ~ 6.00 _ Ij„ v
0 0 . other hn Ious Area Dl~$igo5~rm~aT ` Cu ~ On-Site Store a and Tar et acre-ft , a.oo W
Road. 236,070 0 ~ Oft; Otl ,'t$04tl ~fi t tl2 . ~ W
,r~ ~ , ' ~ f Y 89 716 0 ~~3 0'f4. ;~f . , „ , ~ , s ~ , 5ldewalk , F, r ~r r, as°019. ' 48 380 t ' 2.00 1-year, 24-hour BMP Storage 14.21 to Z ~1'30'14 . 3'..., : 0 DC 9.424
F Oft ~ , ~ Storm Water Mana ement Facilities , o.oo Target Storage W ~ Meets Goal? Yes W Q
pan and 139,940 0 ; 6;797'' = t1lIIV8tl 6'797 ' 22'8Q5 1:: Existing Design 1 jp _ 1 Z Y t
Ail'.other BMPs' ex ' tForested Buffer . 3 238 0 i~4;533 Areas assigned to this table must sum to the total development site area. X4;533 't~~'~ts ; p C~ ~ N Z Q
w" m ns unmans ed herbaceous cover without livestock. Total Area 5,436,363 0 582,926 49 Pasture has livestock, while Meado ea g 582 926 499198 2607 842 1786 397 Annum Pollutant Load Summary W o.
" • ' a e Area DA assi nments match Pro osed Land Use. Driveways and Parking Lots tnciude curb and gutter. Proposed Drain g ( ) g p Id Land Use. Existln Design Design 0 J M g U ~ n O
"Rooftops" include canopies. Landuse without BMPs with BMPs Z O ~ ~ U N o
3. Assign BMPs Here Sediment (tontyr) 8.27 97.94 7.05 ~
' a. Click on a box to associate a BMP with a specific DA. BMPs should serve the er ald serve the entire DA. Total Phosphorus (Iblyr) 8.4 157.6 39.7 a Total Nitrogen (Iblyr) 91 3480 1517
- - b. Enter storage volume cif applicable) of BMP inacre-ft. 'tand tJselCo 9 Fecal Coliform (count x 10 lyr) 631 5575 1220 ~
• and Use - I~ .-.--------I I
d Use p ed Exis~d as _ BMPs A lied to DA DA1 ~
v ~~~.~Y,4 , r, Ares ~ 7,. h of Stte • - , 81b DA1 DA2 DA3 DA4 Sediment Load ~ 1 Phosphorus Load Nitrogen Load Fecal Coliform Load K~""` 120.00 ~ I 180.0 ~ 4000 6000
Y~~~Ond ~ y,,tf~ 3 ,Ur ~ Row:c ~ o:o~~ ~ o. ,.7~ to K w, I ! ````,,~pnlplllllp?prrryrrrri ~,r ~ s''~ ~ 160.0 3500 - //i - /
t ~ W ..,R,r y~ay D' DeEeelnttort RAsture , 0 ,I~,~v 0000 , i 5000 \ . .w / 1 / I \ 140.0 i \ oo ~ 0 0 r' 30 0 ` o eY~y
. . , X Fora6t. r;,~~- ~ - ,,,:y . Ow,' m , ~ ~ _ ~ 4000 ~ y 00 i x 80.00 120.0 - 2500 ° vo° ~ o
h . Sand FNfe~. ~r,, 1Netlan m , _ I 100.0 ~Do °etn; ~ ~ 60.00 - - i ~ 2000 I 3000 ?~o ti.g„ o r' s. 3 I 80.0 ~ = Q °y ~ °a
~ 0. ',1,, n~Garoen ~ Meadow ~ ~ A u F i;, ~ , xr ~t 4' r ~ . I 1500 U $ OD ~ ~ _ ~ r ~ M ` 40.00 60.0 ~ 2000 o1J (tl~- u
w . r,.'., e. Q.Q7ti a ti~. /?~,,~~.y . w'_ -..w• 1000 0 ~,F~:fi a,~u ; ~ r. ; 40.0 ye ~o°
!m loos Area . k 4 ` ' frtfittratio~i'F,reirch ' F~ ~ 1000 ° F. ` 20.00 , r e ° s ~ 20.0 500 ~ ; o 00 -
Residential & U ht Industrial l ~ ~ _ ~ • ` ` . .M„ ~ , . ` r`' 0.0 ~ D errdefint~d'HMP"' Se uential with ether ass nedBMPs ~ r ti , , 1 L1 ftpp~ 1. . st rY, _i _ 4"~?e-~ 0.00 0.0 i J'
a f!e , ForeSted Buffer '.f _ r?rprrumm~n~rti~
yy ,3. tea ~ ~ • r: " Enter Buffer Width for each DA wiftt ForeFted Suffer (feet): T _ r . 1~•:', . w. • ~ Developed Area Sediment Target Summary r yS
• ,perrrent of D ent zont3 - ~t L~.~~ .y 1 t Y ~ ~ y£ 1 ,Y 1
./.ALn (.4 J. `.Wa ~x~ ; . , f N Storage volume for 1 yr; ?R hr stone acre-#t). ~ 11 ~ N, . ~ ~ Comparison to Target Sediment Loading and Target (tonlyr) o f.•
mme?cial d ea ~ 1~ H lndustrra ~ - i*o a . N°•:.. { ' °,s ~ ~ ~ ~ hx ; 7~~ Notes: Grass channels do not receive removal credit when used in combination with water quality dry swales, 120.00 quality dry swales.
" ; ~ M ;M~ Forested Buffers cannot be used with Wet Ponds, Dry Detention Basins, or Stormwater Wetlands in the ater Wetlands in the same drainage area. 100.00 Design without BMPs 97.32 i
~.~,:1. =Lf?~ 0,094 1 s ~j~~n k. ~ i. ;a 4% . rvious Area . w Design with BMPs 6.66 80.00 Target Loading 14.60
~ :•4:~~' "~a,na~ a.a~ ''i '~na#l:: , 60.00 Meets Goal? Yes
4.tYY. ,1:.
w . Storm Water Mana ement Facilities ' ~~X-'' ; ~ . ao.oo Additional sediment from
~ ~ ~PondlWetlandn.,f~ , 20.00 _ undeveloped areas removed
MP F °~'Euffer ,',F ~ 0.0% ~ ~0.8°k ~~Ail:Otner B S .oft . _ _ , . ~ BMP Performance , ~ ~ 10a~.0°. r ~ ~ '190,1. 0.00 i by BMPs (for reference only); 0.23
~ Site Tata1~,, , ~ 5,476,'~~;~ . , i , 6~~,. ~3 No BMPs Wlth BMPs Target j
1 ~ ` ~ Net Reductions aA1 - - ; ~btalSite trripervtcus,Co?er : 715,4./e Dal Dal Da3 Da4
f ous Cover.w thin, to Aree ~ ~ ; . 6'i.a'~ ~foar converted to infikration b B .MPs _ 35.4°/. ' mpt~,ri Z . , ped . 35,4% Ua%. ; 35,D'h 5.5%.
Y fit>MItrO n 71.2% y a BMPs Meet Sediment Load Reduction and Runoff Control Targets 71.2./° ':33•tl% 71.2%, 19.1% z
Pervious areas are assumed to be 1% impervious ` h ru . i38,2°/. z „ 't~cttat P,hos o s f ~~ah 88.2%' 23.7 88.2°/e ° •
Developed Area refers to that portion of the project not covered by Row Crops, Pasture, Forest, or Meadow ' ~ }':~YS 91i'i1:70 n.~l .0°k 98.1 °Yo 37.1o/a "Target addresses loading from developed portion of site. Developed portion is lawn, BMP area, and impervious area. d 98,1:°le $ ° ° Undeveloped portion is forest, meadow, wetland, pasture, and row aop land uses. ~
97.0°~ ,~QlifQrRt + Check on New Land Use/Cover 97A% 70A°/a 97.0% 2,8'k W 0
Existin Land Use Data OK g
pr~aaedto Modei ~y tit ~u~? t 0
z
Proposed Land Use Data OK

~~~,~oBMPs'~
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DRAINAGE AREA MAP FOR SITE EVALUATION LUATION TOOL
SCALE: 1"=200'
SHEETT20 OF D20
File No. Tax Map No. Job No. 03-001 Co.dd Dwg, File, DRAINAGE/03001SET XREF: DRAINAGE PLAN STATE/03001BASE