20050945 Ver 1_Complete File_20050531

? Kimley-Horn
and Associates, Inc.
May 23, 2006
Cyndi Karoly
North Carolina Division of Water Quality
401 Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Re: Individual Permit/Certification
Jackson Station 11(DWQ9 05-0945)
Union County, North Carolina
Dear Ms. Karoly:
Please find the attached Certificate of Completion for the Individual 404 Permit
and 401 Water Quality Certification to backfill a retaining wall at the Jackson
Station 11 mixed use development project.
If you have any questions or need any additional documentation please contact
me at [phone].
Very truly yours,
KIMLEY-HORN AND ASSOCIATES, INC.
J
Todd St. John
Project Manager
cc: Amanda Jones
US Army Corps of Engineers
151 Patton Avenue, Room 208
Asheville, North Carolina 28801-5006
TEL [phone]
FAX [phone]
MAY 2 6 2006
?YATER QUALITY
4E iLV,DS k,0 STW- A TER BRANCH
a
P.O. Box 33068
Raleigh, North Carolina
27636-3068
QF VA TF9
oG
p ?
DWQ Project No : 05-0945 County: Union
Applicant: A. Perin Development: Company, LLC
Project Name: Jackson Station Zl
Date of Issuance of 401 Water Quality Certification: July 17 , 2005
Certificate of Completion
Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer
Rules, and any subsequent modifications, the applicant is required to return this certificate to the
401/Wetlands Unit, North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC,
27699-1650. This form may be retumed to DWQ by the applicant, the applicant's authorized agent, or
the project engineer. It is not necessary to send certificates from all of these.
Applicant's Certificgttion
I, _Ad el! no in hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed to
be built within substantial compi??apce and intent of the 401 Water Quality Certification and Buffer
Rules, the app e ?ans and?pecifications, and other supporting materials.
Sigratur::_!r/-r•°?i? Date m(,LT /Z :Q foD 4,
Ageni'.yr- ;: 1cation
I, , hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed to
be built within substantial compliance and intent of the 401 Water Quality Certification and Buffer
Rules, the approved plans and specifications, and other supporting materials.
Signature: Date:
If this project was designed by a Certified Professional
I, , as a duly registered Professional (i.e.,
Engineer, Landscape Architect, Surveyor, etc.) in the State of North Carolina, having been authorized
to observe (periodically, weekly, full time) the construction of the project, for the Perrnitee hereby state
that, to the best of my abilities, due care and diligence was used in the observation of the construction
such that the construction was observed to be built within substantial compliance and intent of the 401
Water Quality Certification and Buffer Rules, the approved plans and specifications, and other
supporting materials.
Signature Rea stration No. Date
E [-? 0 W mp. B
MAY 2 6 2006
UENR - WATER QUALITY
i%ETU NDS A0 STORM VATEE BU4CNFVA
NR
North Carolina Division of Water Quality, 401 Wotland9 Certification UNt.
IG50 Mail service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd . Raleigh. NC 27604-2260 (Locatlon)
919-733-1788 (phone). 919-733-6893 (fax), httpJlh2o cnr state nc uslncwellandsl
Michael F. Easley, Governor
Wiliam G Ross Jr, Secretary
North Carolina Department of Environment and Natural Resources
Alan W Klimek, P E. Director
Division of Water Quality
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December 12, 2005
Mr. Sam Aghimien
c/o Oversight & Express Permitting Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, North Carolina 27604
Re: Jackson Station
Waxhaw, North Carolina
DWQ 905-0945
RJH Ref.No.: 1202
Dear Mr. Aghimien:
R. Joe Harris & Associates, L.L.C.
1698 W. Hwy 160, Suite 130, Fort Mill, S.C. 29708
[phone] Fax [phone]
We have enclosed the revised "401 Extended Detention Wetland Worksheet" for the above
referenced project. Revisions have been made per your request and per our conversation on
December 8, 2005.
As noted in our conversation, the BMP Pond is existing per a previous permit and please clarify if
the pond must be reconstructed to meet the surface area ratios specified on the revised worksheet,
or if the pond may remain as standing.
Thank you for your assistance on this project and please feel free to call with any questions or
comments.
Sincerely,
R. JOE HARRIS & ASSOCIATES, PLLC
Brandon S. Pridemore
Project Manager
cc: Todd St. John - McKim & Creed
Adelino Perin - A. Perin Development
7 .7
S
f
X6.9+!'yN
gyn. ,:.
DWQ Project No. 05-0945
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET) WETLAND WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Jackson Station - Stormwater Quality Management Plan
Contact Person: Brandon S. Pridemore Phone Number. ( 803) 802-1799
For projects with multiple basins, specify which basin this worksheet applies to:
Permanent Pool Elevation 607.00 ft.
Temporary Pool Elevation 608.00 ft.
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0*-9" Surface Area
Marsh 9"-18* Surface Area
Micro Pool Surface Area
18.972 sq. fL
8.23 ac.
5,72+/- ac.
3.000 sq. fL
6,472 sq. fL
6,500 sq. fL
3.000 sq. fL
Temporary Pool Volume 66.219 cu. ft.
SAIDA used 2.88
Diameter of Orifice 3" in.
II. REQUIRED ITEMS CHECKLIST
(elevation of the orifice invert out) Bottom=604.00
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 15%)*
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)*
(draw down orifice diameter) (1" Rainfall Drawdown Orifice)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Applicants Initials
41- 5rr, !hMily fl he temporary pool controls runoff from the 1 inch rain.
ttz - Six n reLh14 The basin side slopes are no steeper than 3:1.
it A -5er 4Tr Ito y o A planting plan for the marsh areas with plant species and densities is provided.
-z- Vegetation above the permanent pool elevation is specified.
414 -SEx )4,n*ic+,FD An emergency drain is provided to drain the basin.
The temporary pool draws down in 2 to 5 days.
Sediment storage is provided in the permanent pool.
c - sa qnacaj? A sediment disposal area is provided.
?$a Access is provided for maintenance.
-- A site specific, signed and notarized operation and maintenance agreement is provided.
-? The drainage area (including any offsite area) is delineated on a site plan.
Access is provided for maintenance.
?z Plan details for the wetland are provided.
Plan details for the inlet and outlet are provided.
ti--3- c- ? site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
httpJm2o.ehnr.state.nc.uslncwetiandsloandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10% open water, 50% high marsh, 40% low marsh.
Brandon Pridemore (BSP) on behalf of A. Perin Development. R. Joe Harris & Associates, PLLC is not the
responsible party for implementing nor maintaining the stormwater management plan.

Exhibit "A"
Worksheet Comments
Jackson Station Development
Union County, North Carolina
The proposed pond is an existing structure previously permitted by DWQ and the
additional acreage added into the pond will exceed the existing storage volume for
the 1" rainfall by less than 350 cubic feet, or less than 1" of detainment.
2. Existing basin slopes are 2:1 and do not meet the 3:1 slope preferred. This is an existing
condition and 2:1 slopes were specified in original approval of the site's stormwater
management plan.
3. A planting list has been provided and densities to be coordinated with regional office.
4. Due to site constraints, an emergency drain is not provided, but use of a pump specified
to drain the pools, per the original approval of the stormwater management plan.
5. Sediment disposal areas are available within the project site, as controlled by the
Permittee. Development site has an approved erosion and sediment control plan
approved by DENR.
J
Project Nam e: Jackson Station
Project No. DW Q 05-0945
SUBAHITED DESIGN: 1 REQUIRED DESIGN:
12/13/2005
elevations

Permanent Pool (ft) 607
Temporary Pool (ft) 608 1 ft. depth ok

areas
Permanent Pool SA (sq ft) 18972 10239 sq. ft. ok
Drainage Area (ac) 8.23
Impervious Area (ac) 5.72 69.5 % -
Forebay (ft2) 3000 15.812777 % ok
High Marsh (ft2) 6472 34.1 % ok
Low Marsh (ft2) 6500 34.3 % ok
Micropool (ft2) 3000 15.812777 % ok
100 %
volumes
Temporary Pool (cu ft) 66219 20181 cu. ft. ok
other parameters
SA/DA 2.88 2.86 -
Orifice Diameter (in) 3 0.17 cfs drawdown -
Design Rainfall (in) 1 4.6 day drawdown ok
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 70
Project Impervious 69.5
Next Highest 80
0 ft. Permanent Pool Depth
SA/DA from Table
2.88
2.86
3.36

M
Emailing: 401 Extended Detention Wksht, Exhibit A
J
Subject: Emailing: 401 Extended Detention Wksht, Exhibit A
From: Brandon Pridemore <[e-mail]>
Date: Mon, 12 Dec 2005 13:38:36 -0500
To: [e-mail]
CC: [e-mail], [e-mail]
Sam,
Please find attached the revised 401 Extended Detention Wetland Worksheet
for Jackson Station. I have adjusted the surface areas for the pond as
requested and to clarify, the bottom of the permanent pool is 604.00, which
provides 3' of permanent pool elevation.
In addition, the draw down orifice is 3" by design for the 1" rainfall
treatment and the 6" orifice is for the pond detention design. The 3"
orifice has been specified on the worksheet.
The submitted plans do not reflect the surface areas stated on the
worksheet. Will it be necessary to correct and redesign these parameters on
the plans or can this be done in the field and through as-built
verification?
I have put the originals in the mail and please feel free to call with any
questions.
Thank you.
Brandon S. Pridemore
R. Joe Harris & Associates, PLLC
1698 West Highway 160
Suite 130
Fort Mill, SC 29708
Phone: [phone]
Fax: [phone]
401 Extended Detention Wksht.PDF Content-Type: application/pdf
Content-Encoding: base64
Exhibit A.PDF Content-Type: application/pdf
Content-Encoding: base64
1 of 1 12/13/2005 9:39 AM
DWQ Project No. 05-0945
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET) WETLAND WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Jackson Station - Stormwater Quality Management Plan
Contact Person: Brandon S. Pridemore Phone Number. ( 803) 802-1799
For projects with multiple basins, specify which basin this worksheet applies to:
Permanent Pool Elevation 607.00 ft.
Temporary Pool Elevation 608.00 ft.
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0'-9' Surface Area
Marsh 9'-18' Surface Area
Micro Pool Surface Area
18,972 sq. ft.
8.23 ac.
5,72+/- ac.
3.000 sq. ft.
6,472 sq. ft.
6,500 sq. ft.
3,000 sq. ft.
Temporary Pool Volume 66.219 cu. ft.
SAIDA used 2.88
Diameter of Orifice 3" in.
REQUIRED ITEMS CHECKLIST
(elevation of the orifice invert out) Bottom=604.00
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 35%)*
(at permanent pool elevation approximately 15%)*
(volume detained on top of the permanent pool)
(surface area to drainage area ratio)"
(draw down orifice diameter) (1" Rainfall Drawdown Orifice)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Applicants Initials
#t -5Fr 4nrr,ci1Fo The temporary pool controls runoff from the 1 inch rain.
tiz -5a QhT?,z „y.,j The basin side slopes are no steeper than 3:1.
#3 -5ey Am,re f a A planting plan for the marsh areas with plant species and densities Is provided.
'? Vegetation above the permanent pool elevation is specified.
44 -SES?ne,?vv An emergency drain is provided to drain the basin,
s-t--- The temporary pool draws down in 2 to 5 days.
Sediment storage is provided in the permanent pool.
#5 - 5a ArfALHEi A sediment disposal area is provided,
Access Is provided for maintenance.
a A site specific, signed and notarized operation and maintenance agreement is provided.
The drainage area (including any offsite area) is delineated on a site plan.
Access is provided for maintenance.
Sal Plan details for the wetland are provided.
7FZ-L Plan details for the inlet and outlet are provided.
-r3c?A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
httpJm2o. ehnr.state.nc. us(ncwetlandsloandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10% open water, 50% high marsh, 40% low marsh.
Brandon Pridemore (BSP) on behalf of A. Perin Development. R. Joe Harris & Associates, PLLC is not the
responsible party for implementing nor maintaining the stormwater management plan.
F,xhibit "A"
Worksheet Comments
Jackson Station Development
Union County, North Carolina
The proposed pond is an existing structure previously permitted by DWQ and the
additional acreage added into the pond will exceed the existing storage volume for
the 1" rainfall by less than 350 cubic feet, or less than 1" of detainment.
2. Existing basin slopes are 2:1 and do not meet the 3:1 slope preferred. This is an existing
condition and 2:1 slopes were specified in original approval of the site's stormwater
management plan.
A planting list has been provided and densities to be coordinated with regional office.
4. Due to site constraints, an emergency drain is not provided, but use of a pump specified
to drain the pools, per the original approval of the stormwater management plan.
5. Sediment disposal areas are available within the project site, as controlled by the
Permittee. Development site has an approved erosion and sediment control plan
approved by DENR.
e
December 6, 2005
Mr. Sam Aghimien
c/o Oversight & Express Permitting Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, North Carolina 27604
Re: Jackson Station
Waxhaw, North Carolina
DWQ #05-0945
RJH Ref.No.: 1202
Dear Mr. Aghimien:
R. Joe Harris & Associates, L.L.C.
1698 W. Hwy 160, Suite 130, Fort Mill, S.C. 29708
[phone] Fax[phone]
We have enclosed one copy of the "401 Extended Detention Wetland Worksheet" for the above
referenced project. This information has been submitted as requested and in support of the
stormwater management plan for the project, which was previously submitted on August 23,
2005.
As noted on the worksheet, a few of the items require explanation and those explanations can be
found on Exhibit "A", which is attached to the worksheet.
Please approve our client's request for approval of the submitted stormwater management plan
and if you should have any questions or require additional information, feel free to contact us.
Sincerely,
R. JOE HARRIS & ASSOCIATES, PLLC
Brandon S. Pridemore
Project Manager
cc: Todd St. John - McKim & Creed
Adelino Perin - A. Perin Development
Q?r_,r, -)' F= oeFm?
DEC 7 2005
DENR - WATER QUALITY
1'iET11,NDS MID STORYWATER BRANCH
DWQ Project
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET) WETLAND WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name: 73Aersn,4 4rorr,c.,,r - ?rocm?nnnrx- r? t_ uA •ty MnAiaLEmrxrr RA-!
Contact Person: Ms&!SLnCr4 2c,-Cnnu C: Phone Number: (_603) Ao :L- i-r99
For projects with multiple basins, specify which basin this worksheet applies to: Pay, o it i - nm t L-le-r AE3X=rA
Permanent Pool Elevation (an'r.oo ft.
Temporary Pool Elevation 1.0 O (N It.
Permanent Pool Surface Area i A, 9.7 Z sq. ft.
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0"-9' Surface Area
Marsh 9'-18" Surface Area
Micro Pool Surface Area
A.2.3 ac.
5 _Iz ac.
S? r- 9 sq. ft.
5, -7'S :5 -sq. ft.
y? t.-I L{ sq. ft.
? n to sq. ft.
Temporary Pool Volume (.L21!1 cu. ft.
SAIDA used . AA
Diameter of Orifice lp in
II. REQUIRED ITEMS CHECKLIST
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(at permanent pool elevation approximately 15%)'
(at permanent pool elevation approximately 35%)'
(at permanent pool elevation approximately 35%)'
(at permanent pool elevation approximately 15%)'
(volume detained on top of the permanent pool) 9- it Ye, S-TOeoA Eva&C'
(surface area to drainage area ratio)'
(draw down orifice diameter)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Applicants Initials
111 -Sm AnhcmoThe temporary pool controls runoff from the 1 inch rain.
*2 - !Syr Atrar_?itoThe basin side slopes are no steeper than 3:1.
s13 - 5 m An3%.e A planting plan for the marsh areas with plant species and densities is provided.
Vegetation above the permanent pool elevation is specified.
414 - 5m 4-7wcttE gAn emergency drain is provided to drain the basin.
iEg'a - The temporary pool draws down in 2 to 5 days.
e?2? Sediment storage is provided in the permanent pool.
41 - SEE 4n Ac ie sediment disposal area is provided.
z_ Access is provided for maintenance.
?Z A site specific, signed and notarized operation and maintenance agreement is provided.
?' 1L The drainage area (including any offsite area) is delineated on a site plan.
- Access is provided for maintenance.
Utz- Plan details for the wetland are provided.
Plan details for the inlet and outlet are provided.
ALA site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h 2o.ehnr.state.nc.us/ncwetlands/oandm.doc).
' Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999.10% open water, 50% high marsh, 40% low marsh.
$PAUoeµ iL%0CMoa.E (-7f-0) au 6EHALF of A. Prciri NVELtf-itwT.
r f
Exhibit "A"
Worksheet Comments
Jackson Station Development
Union County, North Carolina
The proposed pond is an existing structure previously permitted by DWQ and the
additional acreage added into the pond will exceed the existing storage volume for
the 1" rainfall by less than 350 cubic feet, or less than 1" of detainment.
2. Existing basin slopes are 2:1 and do not meet the 3:1 slope preferred. This is an existing
condition and 2:1 slopes were specified in original approval of the site's stormwater
management plan.
3. A planting list has been provided and densities to be coordinated with regional office.
4. Due to site constraints, an emergency drain is not provided, but use of a pump specified
to drain the pools, per the original approval of the stormwater management plan.
5. Sediment disposal areas are available within the project site, as controlled by the
Permittee. Development site has an approved erosion and sediment control plan
approved by DENR.
t

Project Name: Jackson station
Project No. DW Q 05-0945
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
12/8/2005
elevations

Permanent Pool (ft) 607
Temporary Pool (ft) 608 1 ft. depth ok
areas
Permanent Pool SA (sq ft) 18972 8543 sq. ft. ok
Drainage Area (ac) 8.23
Impervious Area (ac) 5.72 69.5 % -
Forebay (ft2) 5619 29.617331 % check forebc
High Marsh (ft2) 5753 30.3 % check hi mai
Low Marsh (ft2) 4674 24.6 % check to maj
Micropool (ft2) 1906 10.046384 % check micro,
94.62366 %
volunes
Temporary Pool (cu ft) 66219 20181 cu. ft. ok
other parameters
SA/DA 2.88 2.38 -
Orifice Diameter (in) 6 0.67 efs drawdown -
Design Rainfall (in) 1 1.1 day drawdowm check drab c,
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 60
Project Impervious 69.5
Next Highest 70
0 ft. Permanent Pool Depth
SA/DA from Table
2.06
2.38
2.4
4M C5--?
Cdr
r
Project Name: Jackson station
Project No. DWQ 05-0945
SUBAII7TED DESIGN.- 1 REQUIRED DESIGN:
12/8/2005
elevations

Permanent Pool (ft) 607
Temporary Pool (ft) 608 1 ft. depth ok

areas
Permanent Pool SA (sq ft) 18972 10239 sq. ft. ok
Drainage Area (ac) 8.23
Impervious Area (ac) 5.72 69.5 % -
Forebay (ft2) 5619 29.617331 % check forebt
High Marsh (ft2) 5753 30.3 % check hi mai
Low Marsh (ft2) 4674 24.6 % check to mai
Micropool (ft2) 1906 10.046384 % check micro,
94.62366 %
volumes
Temporary Pool (cu ft) 66219 20181 cu. ft. ok
other parameters
SA/DA 2.88 2.86 -
Orifice Diameter (in) 6 0.67 cfs drawdown -
Design Rainfall (in) 1 1.1 day drawdown check draws
Linear Interpolation of Correct SA/DA * * *
% Impervious
Next Lowest 60
Project Impervious 69.5
Next Highest 70
0 ft. Permanent Pool Depth
SA/DA from Table
2.4
2.86
2.88
Project Name: Jackson station
Project No. DWQ 05-0945
SUBMITTED DESIGN: 1
12/8/2005
elevations
Permanent Pool (ft) 605
Temporary Pool (ft) 608
areas
Permanent Pool SA (sq ft) 18972
Drainage Area (ac) 8.23
Impervious Area (ac) 5.72
Forebay (ft2) 3000
High Marsh (ft2) 6500
Low Marsh (ft2) 6472
Micropool (ft2) 3000
volumes
Temporary Pool (cu ft)
66219
other parameters
SA/DA
Orifice Diameter (in)
Design Rainfall (in)
2.88
3
1
Linear Interpolation of Correct SAIDA * * *
% Impervious
Next Lowest 60
Project Impervious 69.5
Next Highest 70
REQUIRED DESIGN:
3 ft. depth
10239 sq. ft.
69.5 %
15.812777 %
34.3 %
34.1 %
15.812777 %
100 %
20181 cu. ft.
2.86
0.29 cfs drawdown
2.6 day drawdown
0 ft. Permanent Pool Depth
SA/DA from Table
2.4
2.86
2.88
ok
ok
ok
ok
ok
ok
ok
okaw?? k
I
WET [WETLAND] DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
[Wetland maintenance wording is bracketed. Please modify the document as appropriate.]
The wet [wetland] detention basin system is defined as the wet [wetland] detention basin, pretreatment
including forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet [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.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet [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 (i.e. stockpiling near a wet [wetland] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 0.15' feet in the main pond, the sediment shall be removed.
[For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the
sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of
soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations.
Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stockpiled
for more than two weeks.]
When the permanent pool depth reads feet in the forebay [and micro-pool], the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 07.00
Sediment moval El. 75%
-------------- -- Sediment Removal Elevation too 1j.,5! 175%_
Bottom E vafton(,Qy ool 5% -------------
Bottom t
FOREBAY f.WN POND
s-r?c??'-UETU
DETDyr
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
[For wetlands: Wetland planting densities in the marsh areas should be maintained by replanting bare
areas as needed. Wetland plants should be encouraged to grow in the marsh areas.]
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wet (wetland] detention basin system shall be maintained in good working order.
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or
replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Adcl ino Pcrirn
Titre: man a?Lnq Mcxnlo r
Address: 14 V411ey Place, Chesttr , ntT 07930
Phone:_C W) . 8.79 ,47,29
Signature:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
I, M&V U1?eGjA1j,9 LtJO-1Sffr , a Notary Public for the State of 1Very JZr Set/
County of MOrr z , do hereby certify that AddliAO Ocr;r)
personally appeared before me this /&01 day of Deee/YUOe-*" , -2003 , and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,
SEAL IJLAVl.la CtAlp
UJ
MARY VIRGINIA AUGHT
My commission expires-4m....""yy
Coan!abnFxp 1DW/ ^=^3
T... It .Cn
KimleyHorn
and Associates, Inc.
August 31, 2005
Mr. Sam Aghimien
NCDWQ Wetlands Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Re: Stormwater Manage Plans for Jackson Station 11
DWQ# 05-0945
Union County, NC
Dear Mr. Aghimien:
On behalf of our client, Jackson Station II, LLC, we are submitting stormwater
management plans for your approval prepared by R.J. Harris and Associates,
PLLC.
Please give me a call at [phone] should you have any questions or need
additional information concerning this invoice request.
Very truly yours,
KIMLE HORN AND ASSOCIATES, INC.
Todd St. Jo , P.E.
Attachments
P.O. Box 33068
Ra;eigh, NoO Carol.na
27636-3068
p=@R0WMD
SEP 1 2005
DENR - WATER QUALITY
WETLANDS AND STORMATER BRANCH
TEL [phone]
FAX [phone]
W AT ?9QG
? r
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
July 17, 2005
Mr. Adelino Perin
A. Perin Development Company, LLC
12 Valley Place
Chester, NJC, 07930
Re: Jackson Station H, Union County
DWQ #05-0945; USACE Action ID. No. 200531913
APPROVAL of 401 Water Quality Certification
Dear Mr. Perin:
Attached hereto is a copy of Certification No. 3520 issued to Mr. Adelino Perin of A. Perin Development
Company, LLC, dated July 17, 2005. In addition, you should get any other federal, state or local permits
before you go ahead with your project including (but not limited, to) Solid Waste, Sediment and Erosion
Control, Stormwater, Dam Safety, Non-discharge and Water Supply Watershed regulations.
If we can be of further assistance, do not hesitate to contact us.
Sincerely, /
4'r?z -,
/t24
/Alan W. Klimek, P.E.
AWKIcbk
Attachments: Certificate of Completion
cc: U.S. Army Corps of Engineers, Asheville Regulatory Field Office
Wilmington District, USACOE
Alan Johnson, DWQ, Mooresville Regional Office
DLR Mooresville Regional Office
File Copy
Central Files
Todd St. John, Kimley-Horn & Associates, Inc., P.O. Box 33068, Raleigh, NC, 27636-3068
Filename: 050945Jackson(Union)401
401 Wetlands Certification Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet http•//h2o.enr.state.nc.us/ncwetlands
Noy` iCarolina
Natunilly
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Mr. Adelino Perin of A. Perin Development Company, LLC
Page 2 of 5
July 14, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 21-1, Section.0500 to Mr. Adelino Perin of A. Perin Development Company, LLC
to fill 0.10 acres of wetlands and 188 linear feet of unnamed perennial tributaries to Blythe Creek in the
Catawba River Basin, associated with the construction of the Jackson Station II commercial development in
Union County, North Carolina, pursuant to an application filed on the 8th day of June of 2005 (received by
the Division on June 10, 2005. Previous impacts associated with Jackson Station included 250 feet of
perennial stream fill, approved by the Division in a Certification issued October 8, 2003.
The application and supporting documentation provides adequate assurance that the proposed work will
not result in a violation of applicable Water Quality Standards and discharge guidelines. Therefore, the
State of North Carolina certifies that this activity will not violate the applicable portions of Sections 301,
302, 303, 306, 307 of PL 92-500 and PL 95-217 if conducted in accordance with the application, the
supporting documentation, and conditions hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and as
described in the Public Notice. If the project is changed, prior to notification a new application for a new
Certification is required. If the property is sold, the new owner must be given a copy of the Certification
and approval letter and is thereby responsible for complying with all conditions of this Certification. Any
new owner must notify the Division and request the Certification be issued in their name. Should wetland
or stream fill be requested in the future, additional compensatory mitigation may be required as described
in 15A NCAC 21-1.0506 (h) (6) and (7). If any plan revisions from the approved site plan result in a
change in stream or wetland impact or an increase in impervious surfaces, the DWQ shall be notified in
writing and a new application for 401 Certification may be required. For this approval to be valid,
compliance with the conditions listed below is required.
Conditions of Certification:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and general
conditions of this Certification (or Isolated Wetland Permit) are met. No other impacts are
approved including incidental impacts. Furthermore, a final project design, including all
impervious surfaces shall be provided to this Office before the impacts approved herein occur:
Amount Approved
nits Plan Location or Reference
Wetlands 0.10 acres Corps of Engineers' Public Notice
Stream 188 feet Corps of Engineers' Public Notice
Sediment and Erosion Control:
2. Erosion and sediment control practices must be in full compliance with all specifications governing
the proper design, installation and operation and maintenance of such Best Management Practices in
order to protect surface waters standards:
a. The erosion and sediment control measures for the project must be designed,
installed, operated, and maintained in accordance with the most recent version of the
North Carolina Sediment and Erosion Control Planning and Design Manual.
Mr. Adelino Perin of A. Perin Development Company, LLC
Page 3 of 5
July 14, 2005
b. The design, installation, operation, and maintenance of the sediment and erosion
control measures must be such that they equal, or exceed, the requirements specified
in the most recent version of the North Carolina Sediment and Erosion Control
Manual. The devices shall be maintained on all construction sites, borrow sites, and
waste pile (spoil) projects, including contractor-owned or leased borrow pits
associated with the project.
c. For borrow pit sites, the erosion and sediment control measures must be designed,
installed, operated, and maintained in accordance with the most recent vdrsion of the
North Carolina Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond the
footprint of the impacts depicted in the 404/40 1 Permit Application. All construction activities,
including the design, installation, operation, and maintenance of sediment and erosion control Best
Management Practices, shall be performed so that no violations of state water quality standards,
statutes, or rules occur;
4. Sediment and erosion control measures shall not be placed in wetlands or waters to the maximum extent
practicable. If placement of sediment and erosion control devices in wetlands and waters is
unavoidable, they shall be removed and the natural grade'restored within six months of the date that the
Division of Land Resources has released the project;
Continuing Compliance:
5. Mr. Adelino Perin of A. Perin Development Company, LLC, shall conduct construction activities in a
manner consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate requirements of
State law and federal law. If the Division determines that such standards or laws are not being met
(including the failure to sustain a designated or achieved use) or that State or federal law is being
violated, or that further conditions are necessary to assure compliance, the Division may reevaluate
and modify this Certification to include conditions appropriate to assure compliance with such
standards and requirements in accordance with 15A NCAC 2H.0507(d). Before modifying the
Certification, the Division shall notify Mr. Adelino Perin of A. Perin Development Company, LLC
and the US Army Corps of Engineers, provide public notice in accordance with 15A NCAC 2H.0503
and provide opportunity for public hearing in accordance with 15A NCAC 2H.0504. Any new or
revised conditions shall be provided to Mr. Adelino Perin of A. Perin Development Company, LLC in
writing, shall be provided to the United States Army Corps of Engineers for reference in any Permit
issued pursuant to Section 404 of the Clean Water Act, and shall also become conditions of the 404
Permit for the project;
Mitigation:
6. Compensatory Mitigation Using the Ecosystem Enhancement Program (EEP)
Mitigation must be provided for the proposed impacts as specified in the table below. We
understand that you wish to make a payment to the Wetlands Restoration Fund administered by
the NC Ecosystem Enhancement Program (EEP) to meet this mitigation requirement. This has
been determined by the DWQ to be a suitable method to meet the mitigation requirement. Until
the EEP receives and clears your check (made payable to: DENR - Ecosystem Enhancement
Program Office), no impacts specified in this Authorization Certificate shall occur. The EEP
Mr. Adelino Perin of A. Perin Development Company, LLC
Page 4 of 5
July 14, 2005
should be contacted at [phone] if you have any questions concerning payment into a
restoration fund. You have one month from the date of this approval to make this payment. For
accounting purposes, this Authorization Certificate authorizes payment into the Wetlands
Restoration Fund to meet the following compensatory mitigation requirement:
Compensatory Mitigation
Required River and Sub-basin Number
Streams 188 03050103
Stormwater:
7. Written Stormwater Management Plan (Final Plan Needed)
A final, written stormwater management plan (including a signed and notarized Operation and
Maintenance Agreement) shall be submitted to the 401 Oversight and Express Permitting Unit
(2321 Crabtree Blvd., Suite 250, Raleigh, NC, 27604) within 60 days of the issuance of the 401
Water Quality Certification. The stormwater management plans shall be approved in writing by
this Office before the impacts specified in this Certification occur. You have the option of using
the Express Review Program for expedited approval of these plans. If you propose to use the
Express Review Program, remember to include the appropriate fee with the plan. The stormwater
management plan must include plans, specifications, and worksheets for stormwater management
facilities that are appropriate for the surface water classification and designed to remove at least
85% TSS according to the most recent version of the NC DENR Stormwater Best Management
Practices Manual. The facilities should also include Low Impact Development Best Management
Practices to the extent practical. These facilities must be designed to treat the runoff from the
entire project, unless otherwise explicitly approved by the Division of Water Quality. Also,
before any permanent building is occupied at the subject site, the facilities (as approved by this
Office) shall be constructed and operational, and the stormwater management plan (as approved
by this Office) shall be implemented. The structural stormwater practices as approved by this
Office as well as drainage patterns must be maintained in perpetuity. No changes to the structural
stormwater practices shall be made without written authorization from the Division of Water
Quality.
Other conditions:
8. If concrete is used during construction (e.g., headwalls), a dry work area must be maintained to
prevent direct contact between curing concrete and stream water. Water that inadvertently contacts
live concrete should not be discharged to surface waters due to the potential for altered water
chemistry and toxicity to aquatic life;
9. Deed Notifications
Deed notifications or similar mechanisms shall be placed on all retained jurisdictional wetlands,
waters and protective buffers in order to assure compliance for future wetland, water and buffer
impact. These mechanisms shall be put in place prior to impacting any wetlands, waters and/or
buffers approved for impact under this Certification Approval and Authorization Certificate. A
sample deed notification can be downloaded from the 401/Wetlands Unit web site at
http://h2o.enr.state.nc.us/ncwetlands. The text of the sample deed notification may be modified as
appropriate to suit to this project.
Mr. Adelino Perin of A. Perin Development Company, LLC
Page 5 of 5
July 14, 2005
Also, this approval to proceed with your proposed impacts or to conduct impacts to waters as
depicted in your application shall expire upon expiration of the 404 Permit.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon written
request within sixty (60) days following receipt of this Certification. This request must be in the form of a
written petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. If
modifications are made to an original Certification, you have the right to an adjudicatory hearing on the
modifications upon written request within sixty (60) days following receipt of the Certification. Unless
such demands are made, this Certification shall be final and binding.
This the 14th day of July 2005
DIVISION OF WATER QUALITY
/1", Alan W. Klimek, P.E.
Water Quality Certification #3520
AWK/cbk
RJH:1
August 23, 2005
R. Joe Harris & Associates, L.L.C.
1698 W. Hwy 160, Suite 130, Fort Mill, S.C. 29708
[phone] Fax [phone]
Mr. Alan Klimek, PE
c/o 401 Oversight and Express Pennitting Unit
2321 Crabtree Boulevard
Suite 250
Raleigh, North Carolina 27604
Re: Jackson Station
Waxhaw, North Carolina
DWQ #05-0945
RJH Ref.No.: 1202
Dear Sir/Madam:
We have enclosed the following items for your review and approval of the proposed stonnwater
management plan for the above referenced site:
Copy of the Wet Detention Basin Operation and Maintenance Agreement, which is
already on file with DWQ for the studied detention pond. Original stormwater manage-
ment plan was approved on January 8, 2004 by Mr. John Dorney.
2. One set of the revised BMP pond calculations for Pond # 1.
Two sets of the revised stormwater management plan for Pond #I -
With your approval of the revised stor nwater management plan, this plan should supercede the
already approved stonmvater management plan for Extended Detention Pond #1, which is on file
with DWQ. No changes or revisions are proposed for the previously approved BMP Pond 42 and
shall be constructed per the approved plan on file.
If you should have any questions or require any additional information, please feel free to contact
us.
Sincerely,
R. JOE HARRIS & ASSOCIATES, PLLC
Brandon S. Pridemore
Project Manager p [01 D
D
cc: Adelino Penn - A. Perm Dev.
Todd St. John-McKim & Creed AUG 2 9 2G05
-1NAi ER OU:;t.IT
WETILAN2-33 040 ST-RUNATE-i F', .NCH
f WET [WETLAND] DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
[Wetland maintenance wording Is bracketed. Please modify the document as appropriate.]
The wet [wetland] detention basin system is defined as the wet [wetland] detention basin, pretreatment
including forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet [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.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet [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 (i.e. stockpiling near a wet [wetland] detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads O.-IS' feet in the main pond, the sediment shall be removed.
[For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the
sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of
soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations.
Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stockpiled
for more than two weeks.]
When the permanent pool depth readsa -15' feet in the forebay [and micro-pool], the sediment shall
be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation o7.0o
Sediment moval El. - 75%
------------- - Sediment Removal Elevation !.0 1A'___ 75%
------------- ------
--------------------
Bottom E vation cd 5%
FOREBAY MAIN POND
?O PV 1?cN4 ?? ? Tu
*'- - - • -' ^ ?X'r•Yp?Tf?ow1 5-`p?mkygTtx E
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
[For wetlands: Wetland planting densities in the marsh areas should be maintained by replanting bare
areas as needed. Wetland plants should be encouraged to grow in the marsh areas.]
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
7. All components of the wet [wetland] detention basin system shall be maintained in good working order.
8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or
replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president. .
I, MLgrV U14-Gidin WR- I SHr , a Notary Public for the State of NCW Jdr-S!W
County of MOrri z , do hereby certify that Adeli no iocrin
personally appeared before me this /6141 day of NeeMbeJ" _,,2003 , and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,
1
SEAL UUt9t1L(d. &A,
MARY VIRGINIAL
My commission expires
corn a? ta29=
T.. - n _Cn
Print name: AdcJ ino Porn
Title: m an Qgwq Mcrnber
Address: /a V, 31-16V P! ctce , Chester- , NT 072,30

Stormwater Management Plan
Revision to Existing Extended Detention Pond #1
for
Jackson Station
Waxhw, North Carolina
Prepared for:
A. Perin Development Company, LLC
12 Valley Place
Chester, New Jersey 07930
RJH Ref. No. 1202
August 23, 2005
0
0
D?E.SSI041
••%
SEAL 0: ci
P-0197
co,
Prepared by:
i 11V11G. OVJ-OVG-1 /77
26207
GINS
?F HARR??r°'?ti`h?
?rrrertr^"s"
Fax: [phone]
® Project Summary
for
Jackson Station Stormwater Management Plan
Revision to Extended Detention Pond #1
Purpose:
On behalf of A. Perin Development Company, LLC (APD), R. Joe Harris & Associates,
PLLC (RJH) performed a study to determine if the additional runoff contribution
projected from the additional fill on Lot #2 at Jackson Station could be accepted into the
existing Extended Detention Pond #1. APD has sought and received a permit for the
necessary fill of additional wetlands that currently extend from the existing retaining wall
to the property line, and the written stormwater management plan is to fulfill Condition
#7 of the 401 Certification issued July 17, 2005.
Project History:
RJH had previously submitted a written stormwater management plan to the Division of
Water Quality on December 19, 2003, which included Extended Detention Pond #1 and
the stormwater management plan was approved on January 8, 2004. Detention Pond #1
is an existing, functioning pond and the required Wet Detention Basin Operation and
Maintenance Agreement is on file with DWQ Raleigh Office.
Study Results:
The additional, proposed fill behind the existing retaining wall between Lot #I and Lot
#2 equals approximately 0.310 acres. The total area for Sub-Basin #I now equals 3.081
acres and the same curve number (CN) was held assuming 85% impervious surface area.
The base storage elevation for stormwater detention is 607.00' and the installed design
specified that the controlled volume for the 1" rainfall be contained between 607.00' and
608.00'. With the additional area to be added, the 1" rainfall storage volume requirement
is 20,325 cu.ft., which slightly exceeds the available storage volume of 19,987 cu.ft. This
will result in a breach of the 6" primary detention orifice of less than %", and no revisions
are proposed given the limited volume of 1" rainfall storage volume lost.
There appears to be no adverse impact to the operation of the detention pond and the
results are as follows:
0

Water Surface Elevation in Detention Pond:
Condition: 2 Year 10 Year 50 Year
Existing Pond 608.61' 609.91' 610.97'
Proposed Pond 608.66' 610.02' 611.11'
Change + 0.05' +0.111 + 0.14'
- Water surface elevation does not crest the emergency spillway during studied storm
events. See Hec-1 results.
Peale Discharge:
Condition: 2 Year 10 Year 50 Year
Existing Pond 1.00 cfs 2.00 cfs 2.00 cfs
Proposed Pond 1.00 cfs 2.00 cfs 2.00 cfs
Change 0.00 cfs 0.00 cfs 0.00 cfs
- No increased discharge during the studied storm events. See Hec-1 results.
Conclusion:
The additional fill proposed by the owner does not have an adverse impact to the existing
extended detention pond and proposed runoff generated by the additional runoff can be
received by the pond. The controlled storage volume for the 1" minfall/runoff will be
slightly exceeded, but no significant storage volume is lost and we do not feel that this
will jeopardize the operation and functionality of the pond.
0
I V I I I Q80e 45' 0.001 W I I!( 011, 44'tt0100" W i! 080' 44' 20100" W
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L
I I I 1080' 45'0.00" W l l l l l l l l l l 080 44'30.00" Jv I! I 1000' 44'20lo0" Jv
Name: WAXHAW Location: 034' 55'52.9" N 080' 44'46.8- W
Date: 8/23/105 Caption: Jackson Station
Scale: 1 inch equals 666 feet Waxhaw, North Carolina
Copyright (C) 19W Maptech, Inc.
Drainage Basin Information
for
Detention Pond #1- Extended Detention Stormxvater Wetlands
Jackson Station - TVaxhaiv North Carolina
Soils Information: Predominant Soil Types: Badin Channery Silty Clay Loam
Tatum Gravelly Silty Clay Loam
Hydrology Group: "C',
Drainage Area: Total Drainage Area into Basin: 8.234 Acres+/-
Contributing Area - Sub Basin #1: 3.081 Acres+l-
Contributing Area - Sub Basin 92: 2.291 Acres+l-
Contributing Area - Sub Basin 0: 1.178 Acres+/-
Contributing Area - Over Pond: 1.684Acres+l-
% Impervious: Sub Basin #1 = (3.08118.234) *85 = 31.81
Sub Basin #2 = (2.29118.234) *85 = 23.65
Sub Basin #3 = (1. 17818.234) *70 = 10.01
® Pond Area = (1.68418.234) *20 = 4.09
Percent Imp. = 69.56
Design % = 70.00
Average CN: Sub Basin 91 = (3.08118.234) *94 = 35.17
Sub Basin 92 = (2.29118.234) *94 = 26.15
Sub Basin #3 = (L] 7818.234) *91 = 13.02
Pond Area = (1.68418.234) *79 = 1616
Average CN = 90.50
Design CN = 91.00
0
Stormwater Quality Management Plan
Jackson Station - Waehaw, North Carolina
BMP Wet Detention Pond Design Calcs.
Revision: Aug. 22, 2005
Jackson Station Stormwater Quality Management Plan
Detention Pond 91 - BMP Extended Detention Stormwater Wetlands
Pond Stage Surface Areas:
Description Elevation Surfaco Area Incr. Volume Accum. Volume
Bottom 604.00 - 0 0
605.00 1,422 1,422
606.00 - 1,914 3,336
Finished Pond (3" Orifice) 607.00 12,333 6,555 9,891 (TOTAL SURFACE SA=18,972)
Single 6" Orifice 608.00 21,020
609.00 23,124
610.00 25,228
611.00 27,407
612.00 29,587
Four (4) 4.0' X .5' Weirs 612.70 31,148
613.00 31,842
614.00 34,096
615.00 36,420
616.00 38,744
617.00 41,125
Emergency Spillway 618.00 43,505
619.00 45,940
620.00 48,375
621.00 50,863
Top of Embankment 622.00 53,352
Drainage Area: 8.234 Acres
Project Area: 8.234 Acres
% Impervious: 70 Percent
Pond Depth: 3 Feet
SAIDA: 2.88
Required Surface Area (2.881100) X 8.234 Acres X 43,560 S.F./Ac.
10,330 Sq.Ft (OK - See Surface Area of Permanent Pool = 12,333 sq.ft)
Runoff Volume = 0.05 +.009 (% Impervious)
= 0.68 in.ln.
Volume (To Be Controlled) = Design Rainfall X Runoff Volume X Drainage Area
_ (1" Rainfall) X (.68 in./n.) X (1/12 feetln.) X (8.234 acres) X (43,560 sq.f /acre)
= 20,325 ai.ft (Stage Storage From 607' to 608' is 19,987 cu.ft.)
Release Rate = (19,987 cu.ft.)/((2 days) X(86,400 sec./day))
0.12 cu.ft./sea (OK - Average Rate of Release 0.11 cfs will drain in approx. 2.00 days)
Required Forebay Volume = (20%) X (Water Quality Pool Volume + Forebay Volume) ' At permanent pool level
_ (20%) X (9,891 cu.ft + 11,214 cu.ft.)
= 4,227 cu.ft
Forebay Volume Provided = See Attached Forebay Volume Chart
= 11,214 cu.ft. (Forebay #1 & #2 Combined)
Permanent Pool Surface Art
0" - 9" (Min. 35% of Area) Required Minimum = (0.35)(12,333 Sq.Ft)
4,317 Sq.Ft.
Provided Surface Area ='5,753 Sq.Ft. (46.60°/x)
9" -18" (Min. 35% of Area) Required Minimum = (0.35)(12,333 Sq.FL)
='4,317 Sq. Ft
Provided Surface Area ='4.674 Sq.Ft (37.90°/x)
18" - 36" (Min. 15% of Area) Required Minimum = (0.15)(12,333 Sq.Ft.)
1.850 Sq. Ft
Provided Surface Area 1,906 Sq. Ft. (15.50%)
" Permanent pool surface area excludes the surface area directly over the sediment forebay at permanent pool elevation.
Stormwater Quality Management Plan
Jackson Station - Waxhaw, North Carolina
BMP Wet Detention Pond Design Calcs
Revision: Aug. 22, 2005

PROJECT NAME: Jackson Station
PROJECT #: 1202 Storm
DESCRIPTION: Pond #1 - Extended Detention
POND STORAGF, VOLUME:
DATE: 8/22/2005
DESIGNER: B.S.P.
ENGINEER: R.1.11.
CONTOUR ELEVATION INCRE.AIENTAL ACCUM.
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(S.r.) (FP.) (C.F.) (C.F.)

0.0 n o
1.0 19.9S7 19.957
-1.0 22.06-1 42.0;1
3.0 24.16S 66.319
-1.0 26.310 92.529
5.0 28.490 121.019
6.0 ;0.70s 1-51.737
7.0 ',".963 I54.6S9
S.0 3? 2,2 -119.941
9.0 37.576 257.517
10.0 39,929 297.446
11.0 42.309 339.7i5
12.0 4-1.717 354.472
13.0 -17.152 431.624
11.0 -19.611 4S1.238
15.0 52.103 533.341

ORIFICE FLOW DATA:

ORIFICE
NO.
D1A.
(IN.)
AREA
(S.F.)
'C, INVr.RT
ELEV.
(IT.) CLNTR.
ELEX'.
(FT.)
DESCRIPTION
1 0.0-19 607.13 4 " DIAMETER
2 0.196 60X.2 6" DIAMETER
3 0.000 0.00

WEIR FLOW DATA:

WEIR
NO. CREST
ELEV.
(1"r.)
LENGTH
(I•T.)
'C'
1
2
3

SPILLWAY FLOW DATA:
En1ERC1:NCV srn.l.?Vnr
CREST ELEV. _
WIDTII =
Z =
1C, = VARIFS
® Stormwater Quality Management Plan
Jackson Station-Warhaw, North Carolina
Outlet Structure Design
Revision: Aug. 22, 2005
PROJECT NAME:
PROJECT II:
DESCRIPTION:
Jackson Station
1202 Storm
Pond #1 - Extended Detention
DATE: 8/22/2005
DESIGNER: B.S.P.
ENGINEER: R.J.H.
COMBINED FLOW
0
•
0
ORIFICES NVEIILS SPILLWAI'

EIIEV.
QI
(C.h.S.)
Q2
Q3
(C.F.S.)
Q1
(C.h.S.)
Q2
(C.F.S.)
Q3
C.F S.)
QI
(C.F.S.)
I M

607.00 0.00 0.00 (1.1)11 0.00 11.00 0.00 0.00 (1.11(1
605.00 0.22 0,00 0.00 0.00 0.00 0.00 0.00 0.22
609.00 0.32 0 .82 0.00 (1.(111 0.00 (L(IO 0.00 1.1-1
610.00 0.40 1.25 0.00 0.00 0.00 0.(1(1 0.011 1.65
011.00 11.47 1.57 0.011 (1.(10 11.0(1 11.0(1 11.(1(1 2.03
612.00 0.52 1.83 11.00 0.00 0.00 0.00 0.00 2 +5
613.00 0.57 2.00 0.00 9.86 0.00 0.00 0.00 12.41)
61.1.00 0.62 2.27 (1.11(1 85.93 0.00 0.00 0.00 91.52
615.00 0.66 2.46 11.00 209.29 0.00 (1.(111 11.(1(1 212.41
616.00 0.70 2.63 0.00 359.65 0.00 (1.11(1 11.(1(1 363.02
617.(1(1 0.7-1 2.811 (1.(111 535.00 0.00 0.00 0.00 538.5-1
615.(1(1 0.75 2.95 0.00 732.09 0.00 11.00 11.(1(1 735.82
619.00 0.81 3. I O 1).11(1 945.77 0.00 (1.(111 65.65 III I S.34
620.00 0.55 3.2-1 (1.11(1 I IS' .41 0.00 0.00 186.07 137,.i(,
621.00 0.88 3.37 0.00 1434.72 0.00
- ((.(Ill 342.2-1 1781.22
622.00 (1.91 3.50 0.00 1701.67 (1.0(1
1 0.00 527.34 _233.-13
j
FINAL RESULTS:
STAGE STORAGE DISCHARGE
((T.) (C.F.S.)

607.011 ll 0.00
6115.110 19.957 0.2'
609.00 -12.051 1.14
610.00 66219 1.65
611.00 92.529 2.03
612,00 121.019 2.35
613.00 151.727 12.49
61-1.00 194.689 91.52
615.00 219.941 212.41
616.00 257.517 363.02
617.00 217.446 5 35.54
618.00 339.755 735.82
619.00 384.472 1018.34
620.00 43 L624 1373.56
621.00 481.238 1781.2'
621.00 .53 3 . 341 2233.4,

Stormwater Quality Management Plan
Jackson Station-Waehaw, North Carolina
Outlet Structure Design
Revision: Aug. 22, 2005
PROJECT NAME: Jackson Station DATE: 8/222005
PROJECT #: 1202 Storm DESIGNER: B.S.P.
DESCRIPTION: Pond #1 - Extended Detention ENGINEER: R.J.H.
0

FOREBAY #l POOL STORAGE VOLUME:
CONTOUR ELEVATION INCREMENTAL ACCUM.
ELEV. AREA DIFFERENTIAL VOLUME. VOLUME
(IT.) (S.F.) (FT.) (C.F.)

0.0 0 0
I.0 1,056 1.056
2.0 1.555 2.611
3.0 1.92; 4.534

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Forebay # 1
Revision: Aug. 22, 2005
PROJECT NAME: Jackson Station DATE: 8/22/2005
PROJECT #t: 1202 Storm DESIGNER: B.S.P.
DESCRIPTION: Pond 41 - Extended Detention ENGINEER: R.J.II.
U
0
E
FOREBAY #2 POOL STORAGE. VOLUME:
CONTOUR ELEVATION INCREMENTAL ACCUM.
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(rr.) (S.r.) (rr.) (C.F.) (C.r.)

0.0 0 0
I.0 1.52 1.525
2.0 2.202 3.727
3.0 2.953 6.710

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Forebay X12
Revision: Aug. 22, 2005
PROJECT NAME: Jackson Station DATE: 8/22/2005
PROJECT It: 1202 Storm DESIGNER: B.S.P.
DESCRIPTION: Pond #1 - Extended Detention ENGINEER: R.J.II.

PERMANENT POOL STORAGE VOLUME:
CONTOUR ELEVATION INCREMENTAL ACCUM.
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(FT.) (S.F.) (rr-) (C.F.) (C.F.)

0.0 0 0
1.0 1,422 1.422
2.0 1.914 3.336
3.0 6.555 9.891

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Permanent Pool
Revision: Aug. 22, 2005
0 0 0
1+++++++++++++++++++++++++++++++++++++++++
+ +
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1998
* VERSION 4.1
+ +
* RUN DATE 22AUG05 TIME 17:06:26
+ +
+++++++++++++++++++++++++++++++++++++++++
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
+++*+++++++++++++++++++++++++++++++++++
+ +
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFORNIA 95616
* [phone]
+++++++++++++++++++++++++++++++++++++++
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIO17S OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAT177 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... I....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 2 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
2 ID PROJECT - JACKSON STATION STORQWATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKE17 FROM CHARLOTTE, NC
4 IT 1 22Aug05 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 2 Year 6 Hour Rainfall
8 PB 2.28
9 IN 5
10 PI 0.0 0.007 0.007 0.008 0.008 0.008 0.008 0.009 0.009 0.009
PAGE 1
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page I
0 0 0
11 PI 0.009 0.009 0.010 0.010 0.010 0.011 0.011 0.011 0.012 0.014
12 PI 0.014 0.015 0.016 0.017 0.018 0.021 0.022 0.024 0.026 0.028
13 PI 0.031 0.044 0.050 0.058 0.089 0.115 0.242 0.420 0.168 0.100
14 PI 0.064 0.054 0.047 0.033 0.029 0.027 0.025 0.023 0.021 0.018
15 PI 0.017 0.016 0.016 0.015 0.014 0.012 0.012 0.011 0.011 0.010
16 PI 0.010 0.009 0.009 0.009 0.009 0.008 0.008 0.008 0.008 0.008
17 PI 0.007 0.007 0.007 0.0
18 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU WET POND (POND 01)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 SE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.82 2233.43
29 ZZ
+ + + +
* FLOOD HYDROGRAPH PACKAGE (HEC-1) * * U.S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HYDROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
* RUN DATE 22AUG05 TIME 17:06:26 * * [phone]
2 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 10 OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MI14UTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 22 5 ENDING DATE
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 2

NDTIME 1639 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA SQUARE MILES
PRECIPITATION DEPTH INCHES
LENGTH, ELEVATION FEET
FLOSS CUBIC FEET PER SECOND
STORAGE VOLUME ACRE-FEET
SURFACE AREA ACRES
TEMPERATURE DEGREES FAHRENHEIT
0

++++++++++++++
# +
6 KK * POST *
+ # DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
2 Year 6 Hour Rainfall
9 IN TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TIME INTERVAL IN MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASIN CHARACTERISTICS
TAREA .01 SUBBASIN AREA
PRECIPITATION DATA
8 PB STORM 2.28 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00
.00
.00
.00
.00
.00
.00
Stormwater Quality Nlanagcment Plan
Date: August 22, 2005
2 Year Storm Event
Page 3

.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.05 .05 .05 .05 .05
.03 .03 .03 .03 .03
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS AREA
20 UD SCS DIMENSIONLESS U14ITGRAPH
TLAG .05 LAG
***
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.08 .08 .08 .08 .08
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 48. 30. 19. 12. 8.
5. 3. 2. 1. 1. 0. 0.

Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 4
0 0 9
* *
21 KK * POND
* *
23 KO OUTPUT CC14TROL VARIABLES
IPRNT 4 PRINT CCNTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
ICUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
ROUTE UPLAND DRAINAGE THRU WET POND (POND #1)
HYDROGRAPH ROUTING DATA
25 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF I14ITIAL CONDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R A11D D COEFFICIENT
26 SA AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
27 SE ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
28 SQ DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.
***
COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.78 3.48 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MIL ES
1
Storrnwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 5
0 0
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
POST 28. 3.18 2. 1. 1. .01
ROUTED TO
POND 1. 5.05 1. 0. 0. .01

608.66 5.15
*** NORMAL END OF HEC-1 ***
0
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 6
• s •
1++++++++++++++++*++++++++++++++++++++++++
+ +
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1998
* VERSION 4.1
+ +
* RUN DATE 22AUG05 TIME 17:13:04
+ +
+++++++++++++++++++++++++++++++++++++++++
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
+++++++++++++++++++++++++++++++++++++++
+ +
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFORNIA 95616
* [phone]
+ +
+++++++++++++++++++++++++++++++++++++++
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSICN
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 10 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
2 ID PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKEN FROM CHARLOTTE, NC
4 IT 1 22Aug05 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 10 Year 6 Hour Rainfall
8 PB 3.72
9 IN 5
10 PI 0.0 0.011 0.011 0.011 0.012 0.012 0.012 0.013 0.013 0.013
11 PI 0.014 0.014 0.015 0.015 0.016 0.016 0.017 0.018 0.018 0.023
PAGE 1
Stonmvater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 1
•

12 PI 0.024 0.025 0.026 0.027 0.029 0.036 0.039 0.042 0.045 0.049
13 PI 0.054 0.079 0.089 0.103 0.161 0.201 0.395 0.590 0.275 0.177
14 PI 0.112 0.095 0.084 0.057 0.051 0.047 0.043 0.040 0.038 0.030
15 PI 0.028 0.027 0.025 0.024 0.023 0.019 0.018 0.017 0.017 0.016
16 PI 0.016 0.015 0.015 0.014 0.014 0.013 0.013 0.012 0.012 0.012
17 PI 0.011 0.011 0.011 0.0
18 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU WET POND (POND #1)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 SE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.82 2233.43
29 ZZ
# # + +
* FLOOD HYDROGRAPH PACKAGE (HEC-1) * * U.S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HYDROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
*
# RUN DATE 22AUG05 TIME 17:13:04 *
+ * [phone]
+ #
10 YEAR STOR14 ANALYIS FOR POND #1 - EXTENDED DETENTION STOR14;4ATER WETLANDS
PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 IO OUTPUT CONTROL VARIABLES
IPR14T 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 22 5 ENDING DATE
NDTIME 1639 ENDING TIME
ICE14T 19 CENTURY MARK
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 2
® •
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
+++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
++++++++++++++
+ +
6 KK * POST *
+ + DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
++++++++++++++
10
Year 6 Hour Rainfall
9 IN TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TINE INTERVAL IN MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASIN CHARA CTERISTICS
TAREA .01 SUBBASIN AREA
PRECIPITATION DATA
8 PB STORM 3.72 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
Storm-water Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 3

.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.03 .03 .03 .03 .03
.08 .08 .08 .08 .08
.06 .06 .05 .06 .06
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .00 .01 .00 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS AREA
20 UD SCS DIMENSIONLESS U14ITGR APH
TLAG .05 LAG
+++
.00 .00 .01 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.04 .04 .04 .04 .04
.12 .12 .12 .12 .12
.04 .04 .04 .04 .04
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 48. 30. 19. 12. 8.
5. 3. 2. 1. 1. 0. 0.
r?
LJ

++++++++++++++
+ +
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 4
0 ® •
21 KK * POND
+ +
23 KO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT C014TROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED
TI14INT .017 TIME INTERVAL IN HOURS
ROUTE UPLAND DRAINAGE THRU WET POND (POND #1)
HYDROGRAPH ROUTING DATA
25 RS STORAGE ROUTING
26 SA
27 SE
28 SQ
1

NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.
+++
COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.78 3.48 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 5
i •
+ POST 47. 3.18 4. 1. 1. .01
ROUTED TO
+ POND 2. 4.68 2. 1. 1. .01
+ 610.02 4.82
*** NORMAL END OF H£C-1 ***
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 6
0 0 0
1+++++++++++++++++++++++++++++++++++++++++
+ +
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1998
* VERSION 4.1
+ +
* RUN DATE 22AUG05 TIME 17:16:47
+ +
+++++++++++++++++++++++++++++++++++++++++
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
++++++++++++++++++++++++++++++++*++++++
+ +
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFCRNIA 95616
* [phone]
+ +
+++++++++++++++++++++++++++++++++++++++
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIO14S OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAYBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... I....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 50 YEAR STORM A14ALYIS FOR POND #1 - EXTENDED DETENTION STORt!WATER WETLANDS
2 ID PROJECT - JACKSCN STATION STOPMNATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKEN FROM CHARLOTTE, NC
4 IT 1 22Aug05 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 50 Year 6 Hour Rainfall
8 PB 4.92
9 IN 5
10 PI 0.0 0.016 0.016 0.016 0.017 0.018 0.018 0.019 0.019 0.019
11 PI 0.020 0.020 0.021 0.022 0.022 0.023 0.024 0.025 0.026 0.031
PAGE 1
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 1
® •
0
12 PI 0.032 0.034 0.035 0.037 0.039 0.050 0.053 0.056 0.061 0.066
13 PI 0.073 0.103 0.116 0.134 0.208 0.259 0.508 0.750 0.354 0.229
14 PI 0.146 0.124 0.109 0.077 0.069 0.063 0.059 0.055 0.051 0.040
15 PI 0.038 0.036 0.034 0.033 0.031 0.026 0.025 0.024 0.024 0.023
16 PI 0.022 0.021 0.021 0.020 0.020 0.019 0.019 0.018 0.018 0.017
17 PI 0.017 0.016 0.016 0.0
18 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU W ET POND (POND #2)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 SE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.82 2233.43
29 ZZ
1+++
x +++r++x+++++rr++xr ++rr+r+++r++x++x xxxx
x +x+xx+x
r ++++xxxrx+xrrrxrrrrxxrr+xrrr+ rrr
+
* FLOOD HYDROGRAPH PACKAGE (HEC-1) * * U.S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HYDROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
*
+
r+r RUN DATE 22AUG05

r+r+r+xrr+xrr++x+r TIME 17:16:47

++++++++++++rrrx *
r
+++r *
r
rr++rrx [phone]

++x+x+++x+x+++r++++rr++++x+r+
+
+r+
50 YEAR STOP14 ANALYIS FOR POND #1 - EXTENDED DETENTION STORMIATER WETLANDS
PROJECT - JACKSON STATION STORMtdATER 14ANAGEMEIIT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 IO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
11MIN 1 MI14UTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 22 5 ENDING DATE
NDTIME 1639 ENDING TIME
ICENT 19 CENTURY MARK
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 2
0 0 0
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLC i4
STORAGE VOLUME
SURFACE AREA
TE14PERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT

++++++xxxx+xx+
+
6 KK x
* POST * DEVELOPMENT - BASED Ott FUTURE ANTICIPATED DRAINAGE AREA
+xxx+x+x+++xxx
50
Year 6 Hour Rainfall
9 IN TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TIME INTERVAL Itd MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASIN CHARACTERISTICS
TAREA .01 SUBBASIN AREA
PRECIPITATION DATA
8 PB STORM 4.92 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .01 .00
.01 .01 .01 .01 .01 .01 .01 .01 .01
.00
.00
.00
.00
.00
.00
.00
.00
.00
.O1
Stonnwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 3

.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.04 .04 .04 .04 .04
.10 .10 .10 .10 .10
.07 .07 .07 .07 .07
.03 .03 .03 .03 .03
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .00 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS AREA
20 UD SCS DIMENSIONLESS UNITGRAPH
TLAG .05 LAG
+++
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.03 .03 .03 .03 .03
.05 .05 .05 .05 .05
.15 .15 .15 .15 .15
.05 .05 .05 .05 .05
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 48. 30. 19. 12. 8.
5. 3. 2. 1. 1. 0. 0.
•
at+ t++ xtt ax# x## xtt a++ +++ ttt ttt ttt +ax ++# xt+ ++a +++ ++# xx+ t+x +++ a+x a#+ +ta ++a +++ t+# t++ #+a +#+ +aa +xt xtx +tt
a+x+#+ttttttt+
x +
Storm%vater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 4
• ® !
21 KK * POND
+ +
++++++++++++++
23 KO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
ROUTE UPLAND DRAINAGE THRU WET POND (POND #2)
HYDROGRAPH ROUTING DATA
25 RS STORAGE ROUTING
26 SA
27 SE
28 SQ
1

NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CCNDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.
+++
COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.78 3.48 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
Storm-water Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 5
0 0 0
+ POST 63. 3.18 5. 2. 2. .01
ROUTED TO
+ POND 2. 5.08 2. 1. 1. .01
+ 611.11 5.13
**• NORMAL END OF HEC-1
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 6

•
•
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Stormwater Management Plan
Revision to Existing Extended Detention Pond I#1
for
Jackson Station
Waxhw, North Carolina
Prepared for:
RJH Ref No. 1202
August 23, 2005
Prepared by:
A. Perin Development Company, LLC
12 Valley Place
Chester, New Jersey 07930
SEP 1 2005
DENR. WATER rui,i ITY
%STIANDS AND STOM ATER 6FANCH
?jo

R. JOE HARRIS & ASSOCIATES, PLLC
1698 W. Highway 160, Suite 130
Fort Mill, South Carolina 29708
Phone: [phone]
Fax: [phone]
o? ASS/0??,• i?
SEAL ?• "
r^% 07
2 ?
• Project Summary
for
Jackson Station Stormwater Management Plan
Revision to Extended Detention Pond 91
Purpose:
On behalf of A. Perin Development Company, LLC (APD), R. Joe Harris & Associates,
PLLC (RJH) performed a study to determine if the additional runoff contribution
projected from the additional fill on Lot #2 at Jackson Station could be accepted into the
existing Extended Detention Pond Ill. APD has sought and received a permit for the
necessary fill of additional wetlands that currently extend from the existing retaining wall
to the property line, and the written stormwater management plan is to fulfill Condition
#7 of the 401 Certification issued July 17, 2005.
Project History:
RJH had previously submitted a written stormwater management plan to the Division of
Water Quality on December 19, 2003, which included Extended Detention Pond #1 and
the stormwater management plan was approved on January 8, 2004. Detention Pond #1
is an existing, functioning pond and the required Wet Detention Basin Operation and
Maintenance Agreement is on file with DWQ Raleigh Office.
Study Results:
The additional, proposed fill behind the existing retaining wall between Lot #1 and Lot
#2 equals approximately 0.310 acres. The total area for Sub-Basin #1 now equals 3.081
acres and the same curve number (CN) was held assuming 85% impervious surface area.
The base storage elevation for stormwater detention is 607.00' and the installed design
specified that the controlled volume for the 1" rainfall be contained between 607.00' and
608.00'. With the additional area to be added, the 1" rainfall storage volume requirement
is 20,325 cu.ft., which slightly exceeds the available storage volume of 19,987 cu.ft. This
will result in a breach of the 6" primary detention orifice of less than %2", and no revisions
are proposed given the limited volume of 1" rainfall storage volume lost.
There appears to be no adverse impact to the operation of the detention pond and the
results are as follows:

•
•
Water Surface Elevation in Detention Pond:
Condition: 2 Year 10 Year 50 Year
Existing Pond 608.61' 609.91' 610.97'
Proposed Pond 608.66' 610.02' 611.11'
Change + 0.05' +0.11' + 0.14'
- Water surface elevation does not crest the emergency spillway during studied storm
events. See Hec-1 results.
Peak Discharge:
Condition: 2 Year 10 Year 50 Year
Existing Pond 1.00 cfs 2.00 cfs 2.00 cfs
Proposed Pond 1.00 cfs 2.00 cfs 2.00 cfs
Change 0.00 cfs 0.00 cfs 0.00 cfs
- No increased discharge during the studied storm events. See Hec-1 results.
Conclusion:
The additional fill proposed by the owner does not have an adverse impact to the existing
extended detention pond and proposed runoff generated by the additional runoff can be
received by the pond. The controlled storage volume for the I" rainfall/runoff will be
slightly exceeded, but no significant storage volume is lost and we do not feel that this
will jeopardize the operation and functionality of the pond.
9
I I I 1084° 450.00 W I I I ( 10P0', 44' 40104" y11 V I I 1 1 1 1 1 1 1 0P0*j 44' 20104" 1(V
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1 1 1 1 1 1 1 1 1 1 1 pgp°
45'0.001' W I 1 1 1 1 1 080° 44' 40 00" W I 60/ 44' 20100" W
Name: WAXHAW Location: 034° 55' 52.9" N 080° 44'46.8" W
Date: 8/23/105 Caption: Jackson Station
Scale: 1 inch equals 666 feet Waxhaw, North Carolina
Copyright (C) 1997• Maptech, Inc.
• Drainage Basin Information
for
Detention Pond #1- Extended Detention Slormwater Wellands
Jackson Station - Waxlta?v North Carolina
Soils Information: Predominant Soil Types: Badin Channery Silty Clay Loam
Tatum Gravelly Silty Clay Loam
Hydrology Group: "C"
Drainage Area: Total Drainage Area into Basin: 8.234 Acres+/-
Contributing Area - Sub Basin 91: 3.081 Acres+1-
Contributing Area - Sub Basin #2: 2.291 Acres+/-
Contributing Area - Sub Basin #3: 1.178 Acres+/-
Contributing Area - Over Pond: 1.684 Acres+l-
% Sub Basin #1 = (3.08118.234) *85 = 31.81
Sub Basin #2 = (2.29118.234) *85 = 23.65
Sub Basin 113 = (1. 17818.234) *70 = 10.01
• Pond Area = (1. 68418.234) *20 = 4.09
Percent Imp. = 69.56
Design % = 70.00
Average CN. Sub Basin #1 = (3.08118.234) *94 = 35.17
Sub Basin 92 = (2.29118.234) *94 = 26.15
Sub Basin #3 = (1.17818.23.1) *91 = 13.02
Pond Area = (1.684/8.234) *79 = 1616
Average CN = 90.50
Design CN = 91.00
•
Stormwater Quality Management Plan
Jackson Station - Waxhaw, North Carolina
BMP Wet Detention Pond Design Calcs.
Revision: Aug. 22, 2005
Jackson Station Stonmwater Quality Management Plan
• Detention Pond #1 - BMP Extended Detention Storrnwater Wetlands
Pond Stage Surface Areas:
Description Elevation Surface Area Incr. Volume Accum. Volume
Bottom 604.00 - 0 0
605.00 1,422 1,422
606.00 - 1,914 3,336
Finished Pond (3" Orifice) 607.00 12,333 6,555 9,891 (TOTAL SURFACE SA=18,972)
Single 6" Orifice 608.00 21,020
609.00 23,124
610.00 25,228
611.00 27,407
612.00 29,587
Four (4) 4.0' X .5' Weirs 612.70 31,148
613.00 31,842
614.00 34,096
615.00 36,420
616.00 38,744
617.00 41,125
Emergency Spillway 618.00 43,505
619.00 45,940
620.00 48,375
621.00 50,863
Top of Embankment 622.00 53,352
Drainage Area: 8.234 Acres
Project Area: 8.234 Acres
% Impervious: 70 Percent
Pond Depth: 3 Feet
SA/DA 2.88
Required Surface Area (2.88/100) X 8.234 Acres X 43,560 S.F./Ac.
S 10,330 Sq.Ft (OK - See Surface Area of Permanent Pod = 12,333 sq.ft)
Runoff Volume = 0.05 +.009 (% Impervious)
= 0.68 in./in.
Volume (To Be Controlled) = Design Rainfall X Runoff Volume X Drainage Area
_ (1" Rainfall) X (.68 in./in.) X (1/12 feeUin.) X (8.234 acres) X (43,560 sq.ftlacre)
= 20,325 cu.ft (Stage Storage From 607' to 608' is 19,987 cu.ft)
Release Rate = (19,987 cu.ft.)/((2 days) X (86,400 sec./day))
= 0.12 cu.ft./sec. (OK -Average Rate of Release 0.11 cfs will drain in approx. 2.00 days)
Required Forebay Volume = (20%) X (Water Quality Pod Volume + Forebay Volume) ' At permanent pod level
_ (20%) X (9,891 cu.ft + 11,214 cu.ft)
4,227 cu.ft
Forebay Volume Provided = See Attached Forebay Volume Chart
11,214 cu.ft (Forebay #1 & #2 Combined)
Permanent Pool Surface An
0" - 9" (Min. 35% of Area) Required Minimum = (0.35)(12,333 Sq.Ft)
='4,317 Sq.Ft.
Provided Surface Area ='5,753 Sq.Ft (46.60%)
9" -18" (Min. 35% of Area) Required Minimum = (0.35)(12,333 Sq. Ft)
='4,317 Sq. Ft
Provided Surface Area ='4,674 Sq.FL (37.90%)
18" - 36" (Min. 15% of Area) Required Minimum = (0.15)(12,333 Sq.Ft.)
1.850 Sq.Ft
Provided Surface Area 1,906 Sq.Ft (15.50%)
e • Permanent pod surface area excludes the surface area directly over the sediment Forebay at permanent pool elevation.
Stormwater Quality Management Plan
Jackson Station - Waxhaw, North Carolina
BMP Wet Detention Pond Design Calcs
Revision: Aug. 22, 2005
•
•
PROJECT NAME: Jackson Station
PROJECT #: 1202 Storm
DESCRIPTION: Pond 91 - Extended Detention
POND STORAGE, VOLUME:
DATE: 8/22/2005
DESIGNER: Q.S.P.
ENGINEER: R.J.H.
CONTOUR ELEVATION INCREMENTAL ACCUM.
ELEV. AREA DIFFERENTIA, VOLUME VOLUME
(FI'.) (S.F.) (11-F.) (C.F.)

0.0
I1
u
1.0 19.957 19.957
1.0 22.004 -12.051
3.0 24J 6% 66.219
4.0 26.;10 92.529
5.0 28.490 121.019
6.0 311.705 1 5 1.727
7.0 Q.903 IS4.W)
S.0 219.941
9.0 37.570 ').57.517
10.0 39.929 297.4-16
11.0 41309 33)9.7
12.0 4-4.717 354.472
13.0 -17.152) 431.624
14.0 49.614 481.23S
15.0 X2.103 533.341

ORIFICE FLOW DATA:

ORIFICE
NO.
DIA.
(IN.)
AREA
(S.F.)
Oct INVERT
ELEV.
(Fr.) CENIR.
ELEV.
(ET.)
DESCRIPTION
1 0.049 607.13 4 " DIAMETER
2 0.196 605.21 6" DIAMETER
3 (1.0(1(1 0.00

WEIR FLOW DATA:

WEIR
NO. CREST
ELEV.
(VL)
LENGTH
(ET.)
Oct
1
2
3

SPILLWAY FLOW DATA:
EMERGENCY SPILLWAY
CREST' ELEV. _
WIDTH =
Z =
Oct = vAR1ES
® Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Outlct Structure Design
Revision: Aug. 22, 2005
PROJECT NAME:
PROJECT #:
DESCRIPTION:
Jackson Station
1202 Storm
Pond #1 - Extended Detention
DATE: 8/2212005
DESIGNER: B.S.P.
ENGINEER: R.J.II.
COMBINED FLOW:

E
0
ORIFICES WF.IILS SPILLWAY TOTAL
ELEV.
(Fr.) Q1
(C.F.S.) Q2
(C.F.S.) Q3
(C.F.S.) Q1
(C.I?.S.) Q2
(C.F.S.) Q3
(C.F.S.) Q1
(C.[ ,'-S.) FLOW
(C.F.S.)

007.00 0.00 11.(1(1 14.00 (1.11(1 (1.(111 (1.11(1 0.00 0.00
008.00 0.22 0.00 11.00 0.00 11.00 0.00 0.00 0.22
609.00 0.32 11.52 0.00 0.1111 0.00 11.00 (1.(111 1.14
610.00 0.40 1.25 0.00 I).I1(1 1).1111 11.1111 0.1111 1.65
611.00 0.47 1.57 14.011 1).1)11 11.1111 0.00 0.1111 2.03
612.00 0.52 I.S3 0.00 0.00 0.00 (1.(111 11.00 2.35
613.00 0.57 2.06 0.00 9.S6 14.00 0.00 11.00 12.49
614.00 0.62 2.27 14.00 88.93 1).11(1 0.00 0.00 91.52
615.00 0.06 2.46 11.110 209.29 0.00 0.00 11.1111 212.41
616.00 11.711 2.03, 11.(1(1 359.65 11.1)(1 0.00 0.140 363.02
617.00 0.74 2.511 11.110 5 ;j.110 0.00 11.110 0.011 i ;5.54
615.011 0.7S 2.95 11.110 732.01) 11.00 14.110 11.00 7,5.52
619.00 0.81 3.1(1 0.00 945.77 0.00 0.00 65.65 1018.34
620.00 0.85 3.24 0.00 1 IS' .41 11.00 1).11(1 156.07 1373.5O
621.1111 ().SS 1.37 11.1114 1434.72 11.011 0.00 342.24 1751."
622.00 0.91 3.50 0.00 1701.67 (1.11(1 14.110 527.3-1 223,.1,

FINAL RESULTS:
S'LtGE SrOIUGE DISCHARGE
(IT.) (C.F.) (C.F.S.)

607.00 0 0.00
605.014 19.957 0.22
009.011 42.051 1.14
610.00 66.219 1.65
611.00 92.529 2.0;
012.00 121.019 2.35
613.00 151.727 12.49
614.00 184.689 91.52
615.00 219.941 212.41
610.00 257.517 363.112
617.00 297.446 538.54
615.00 339.755 735.52
619.00 334.472 1015.34
620.00 431.624 1373.56
021.00 4S 1.235 1781."
622.00 5 341 2213.43

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Outlet Structure Design
Revision: Aug. 22, 2005
PROJECT NAIVE: Jackson Station DATE: 8/22/2005
PROJECT #: 1202 Storm DESIGNER: B.S.P.
DESCRIPTION: Pond #1 - Extended Detention ENGINEER: R.J.II.
0
s
rI
L
FOREBAY #1 POOL STORAGE VOLUME:
CONTOUR ELEVATION INCREMENTAL ACCUAL
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(FT.) (S.F.) (FT.) (C.F.) (C.F.)

0.0 0 0
1.0 1.056 1.056
10 1.555 1611
3.0 1.923 4.534

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Forebay #I
Revision: Aug. 22, 2005

•
?J
PROJECT NAME: Jackson Station
PROJECT #: 1202 Storm
DESCRIPTION: Pond #1 - Extended Detention
FOREBAY #2 POOL STORAGE VOLUME:
DATE: 3/22/2005
DESIGNER: B.S.P.
ENGINEER: R.J.H.
CONTOUR ELEVATION INCREMENTAL ACCU111.
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(FT.) (S.F.) (C.F.)

0.0 0 0
1.0 1.525 1.525
'.0 2.202 3.727
3.0 2.983 6.710

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Forebay #2
Revision: Aug. 22, 2005
0
•
•
PROJECT NAME: Jackson Station
PROJECT #: 1202 Storm
DESCRIPTION: Pond #1 - Extended Detention
PERMANENT POOL STORAGE VOLUME:
DATE: 822/2005
DESIGNER: B.S.P.
ENGINEER: R.J.II.
CONTOUR ELEVATION INCREMENTAL ACCUIII.
ELEV. AREA DIFFERENTIAL VOLUME VOLUME
(F I'.) (S.F.) (IT.) (C.F.) (C.F.)

0.0 0 0
1.0 1.422 1.422
2.0 1.914 3.336
3.0 G.>5i 9.891

Stormwater Quality Management Plan
Jackson Station-Waxhaw, North Carolina
Storage Volume - Permanent Pool
Revision: Aug. 22, 2005

* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1998
* VERSIO14 4.1
* RUN DATE 22AUG05 TIME 17:06:26
* *
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFORNIA 95616
* [phone]
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON Rai-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 2 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
2 ID PROJECT - JACKSON STATION STOR-HATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKEN FROM CHARLOTTE, NC
4 IT 1 22Aug05 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 2 Year 6 Hour Rainfall
8 PB 2.28
9 IN 5
10 PI 0.0 0.007 0.007 0.008 0.008 0.008 0.008 0.009 0.009 0.009
PAGE 1
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page I
• ® •
11 PI 0.009 0.009 0.010 0.010 0.010 0.011 0.011 0.011 0.012 0.014
12 PI 0.014 0.015 0.016 0.017 0.018 0.021 0.022 0.024 0.026 0.028
13 PI 0.031 0.044 0.050 0.058 0.089 0.115 0.242 0.420 0.168 0.100
14 PI 0.064 0.054 0.047 0.033 0.029 0.027 0.025 0.023 0.021 0.018
15 PI 0.017 0.016 0.016 0.015 0.014 0.012 0.012 0.011 0.011 0.010
16 PI 0.010 0.009 0.009 0.009 0.009 0.008 0.008 0.008 0.008 0.008
17 PI 0.007 0.007 0.007 0.0
18 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU W ET POND (POND #1)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 SE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.82 2233.43
29 22
lt++
x +++++tt+t+++++t++t xt++ttt+t+x++t++ +txx
x xttttt+xx+t++txxttx+xxxxxtxxt+++t+t+
+ t++
+
* FLOOD HYDROGRAPH PACKAGE (HEC-1) * * U.S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HYDROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
*
+
t+x RU14 DATE 22AUG05

++x++tx++tt+xxxxx+ TIME 17:06:26

t++t+t++t+++++++ *
x
++++ [phone]
x
+++t++++tt++xx+++++++++++++++t++++t+
+
+tx
2 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWWATER WETLANDS
PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 IO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 NUMBER OF HYDROGRAPH ORDINATES
14DDATE 22 5 ENDING DATE
Storm%vater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 2
• • •
NDTIME 1639 ENDING TIME
ICENT 19 CENTURY MARK
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECO14D
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
+++ +++ +++ +++ ++x x++ +++ +++ +xx xxx xx+ +x+ x+x +xx +++ ++x +++ +xx x+x +++ x++ +++ +++ ++x +++ +++ +++ +++ +++ ++x x+x xx+ +++
xxx+x++xx+x+x+
x x
6 KK * POST *
+ x DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
2 Year 6 Hour Rainfall
9 IN TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TIME INTERVAL IN MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASIN CHARACTERISTICS
TAREA .01 SUBBASIN AREA
PRECIPITATION DATA
8 PB STOP.1.1 2.26 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00
.00
.00
.00
.00
.00
.00
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 3

.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.05 .05 .05 .05 .05
.03 .03 .03 .03 .03
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS, LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS AREA
20 UD SCS DIMENSIONLESS UNITGRAPH
TLAG .O5 LAG
+++
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.08 .08 .08 .08 .08
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 48. 30. 19. 12. 6.
5. 3. 2. 1. 1. 0. 0.
E
+++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
Storm«ater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 4
• • s
++++++++++++++
+ +
21 KK * POND
+ +
++++++++++++++
23 KO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPtTCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 1000 LAST ORDINATE PUPTCHED OR SAVED
TIMINT .017 TIME INTERVAL I14 HOURS
ROU TE UPLAND DRAINAGE THRU WET POND (POND #1)
HYDROGRAPH ROUTIN G DATA
25 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
26 SA AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
27 SE ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
28 SQ DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.
+++
COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.78 3.48 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MIL ES
1
Storrmvater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 5
0 0 i
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
POST 28. 3.18 2. 1. 1. .01
ROUTED TO
POND 1. 5.05 1. 0. 0. .01

608.66 5.15
*** NORMAL END OF HEC-1 ***
Stormwater Quality Management Plan
Date: August 22, 2005
2 Year Storm Event
Page 6
0 0 0
1+++++++++++++++++++++++++++++++++++++++++
+ +
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1998
* VERSION 4.1
+ +
* RUN DATE 22AUG05 TIME 17:13:04
+ +
+++++++++++++++++++++++++++++++++++++++++
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
+++++++++++++++++++++++++++++++++++++++
+ +
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFORNIA 95616
* [phone]
+ +
+++++++++++++++++++++++++++++++++++++++
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 10 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
2 ID PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKEN FROM CHARLOTTE, NC
4 IT 1 22AUg05 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 10 Year 6 Hour Rainfall
8 PB 3.72
9 IN 5
10 PI 0.0 0.011 0.011 0.011 0.012 0.012 0.012 0.013 0.013 0.013
11 PI 0.014 0.014 0.015 0.015 0.016 0.016 0.017 0.018 0.018 0.023
PAGE 1
Stomnvater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 1
• • •
12 PI 0.024 0.025 0.026 0.027 0.029 0.036 0.039 0.042 0.045 0.049
13 PI 0.054 0.079 0.089 0.103 0.161 0.201 0.395 0.590 0.275 0.177
14 PI 0.112 0.095 0.084 0.057 0.051 0.047 0.043 0.040 0.038 0.030
15 PI 0.028 0.027 0.025 0.024 0.023 0.019 0.018 0.017 0.017 0.016
16 PI 0.016 0.015 0.015 0.014 0.014 0.013 0.013 0.012 0.012 0.012
17 PI 0.011 0.011 0.011 0.0
16 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU W ET POND (POND #1)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 BE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.62 2233.43
29 Z2
+ + + *
* FLO OD HYDROGRAPH PACKAGE (HEC-1) * * U. S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HY DROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
* RUN
* DATE 22AUG05 TIME 17:13:04 *
+ *
+ [phone]
+
10 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORMWATER WETLANDS
PROJECT - JACKSON STATION STORMWATER MANAGEMENT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 IO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 11UMBER OF HYDROGRAPH ORDINATES
NDDATE 22 5 ENDING DATE
NDTIME 1639 ENDING TIME
ICENT 19 CENTURY MARK
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 2
• • •
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECOND
ACRE-FEET
ACRES
DEGREES FAHRENHEIT
+++ xxs xs# x+# +#x xx# ++# #++ ##x ##+ +xx s#x xxs sss #+x sss sx# x#s s+s +xx ssx sxx ++s ssx sss ssx +s# x+s rxs xxx xx+ xx+ x+s
xxx++x++x+xxx+
s s
6 KK * POST *
+ # DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
+xxx#xxx#x+xx+
10
Year 6 Hour Rainfall
9 it; TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TIME INTERVAL IN MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASIN CHARA CTERISTICS
TAREA .01 SUBBASIN? AREA
PRECIPITATION DATA
8 PB STORM 3.72 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00
.00
.00
.00
.00
.00
.00
.00
.00
.00
Stormu ater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 3

.00 .00 .00 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.03 .03 .03 .03 .03
.08 .08 .08 .08 .08
.06 .06 .05 .06 .06
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .00 .01 .00 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS AREA
20 UD SCS DIMENSIONLESS UNITGRAPH
TLAG .05 LAG
r**
.00 .00 .01 .00 .00
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.04 .04 .04 .04 .04
.12 .12 .12 .12 .12
.04 .04 .04 .04 .04
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 46. 30. 19. 12. 8.
5. 3. 2. 1. 1. 0. 0.
0

* i
Storm«ater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 4

21 KK * POND
x x
xxxxxxxxxxxxxx
23 KO OUTPUT CONTROL VA RIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED
ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
ROUTE UPLAND DRAINAGE THRU WET POND (POND #1)
HYDROGRAPH ROUTING DATA
25 RS STORAGE ROUTING
NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
26 SA AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
27 SE ELEVATION 60 7.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 616.00 622.00
28 SQ DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.
xxx
COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.76 3.48 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MIL ES
PEA K TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLO W PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
1

Stormaater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 5
0 0 0
+ POST 47. 3.18 4. 1. 1. .01
ROUTED TO
+ P014D 2. 4.68 2. 1. 1. .01
+ 610.02 4.82
*"* NORMAL END OF HEC-1 ***
Stormwater Quality Management Plan
Date: August 22, 2005
10 Year Storm Event
Page 6
• s •
lx++xxxxxxx«+x+xxxxx+++x+x+x+x«+««x««x+x«x
x x
* FLOOD HYDROGRAPH PACKAGE (HEC-1)
* JUN 1996
* VERSION 4.1
x «
* RUN DATE 22AUG05 TIME 17:16:47
x x
xxxxxxxxx+++xxxxxxx+x+««xx««««++x«+++««x«
X X XXXXXXX XXXXX X
X X X X X XX
X X X X X
XXXXXXX XXXX X XXXXX X
X X X X X
X X X X X X
X X XXXXXXX XXXXX XXX
+++++++++++«++++++««+++++++++++++++++++
+ +
* U.S. ARMY CORPS OF ENGINEERS
* HYDROLOGIC ENGINEERING CENTER
* 609 SECOND STREET
* DAVIS, CALIFORNIA 95616
* [phone]
+ +
THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW.
THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE.
THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRA1477 VERSION
NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE , SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY,
DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION
KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM
1 HEC-1 INPUT
LINE ID....... 1....... 2....... 3....... 4....... 5....... 6....... 7....... 8....... 9...... 10
1 ID 50 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORM1dATER WETLANDS
2 ID PROJECT - JACKSON STATION STORA,4ATER MANAGEMENT PLAN
3 ID YEAR FLOWS TAKEN FROM CHARLOTTE, NO
4 IT 1 22AugO5 0000 1000
5 IO 4 0 0
6 KK POST DEVELOPMENT - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
7 KM 50 Year 6 Hour Rainfall
8 PB 4.92
9 IN 5
10 PI 0.0 0.016 0.016 0.016 0.017 0.018 0.018 0.019 0.019 0.019
11 PI 0.020 0.020 0.021 0.022 0.022 0.023 0.024 0.025 0.026 0.031
PAGE 1
Stonmvater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 1
• • •
12 PI 0.032 0.034 0.035 0.037 0.039 0.050 0.053 0.056 0.061 0.066
13 PI 0.073 0.103 0.116 0.134 0.208 0.259 0.508 0.750 0.354 0.229
14 PI 0.146 0.124 0.109 0.077 0.069 0.063 0.059 0.055 0.051 0.040
15 PI 0.038 0.036 0.034 0.033 0.031 0.026 0.025 0.024 0.024 0.023
16 PI 0.022 0.021 0.021 0.020 0.020 0.019 0.019 0.018 0.018 0.017
17 PI 0.017 0.016 0.016 0.0
18 BA .0129
19 LS 0 91 0
20 UD .050
21 KK POND
22 KF YES
23 KO 0 0 0 0 21
24 KM ROUTE UPLAND DRAINAGE THRU WET POND (POND #2)
25 RS 1 ELEV 607
26 SA 0.4355 0.4826 0.5309 0.5791 0.6292 0.6792 0.7310 0.7827 0.9987 1.2248
27 SE 607 608 609 610 611 612 613 614 618 622
28 SQ 0 0.22 1.14 1.65 2.03 2.35 12.49 91.82 735.82 2233.43
29 ZZ
+ + + +
* FLOOD HYDROGRAPH PACKAGE (HEC-1) * * U.S. ARMY CORPS OF ENGINEERS
* JUN 1998 * * HYDROLOGIC ENGINEERING CENTER
* VERSION 4.1 * * 609 SECOND STREET
* * * DAVIS, CALIFORNIA 95616
*
+
+++ RUN DATE 22AUG05

++++++++++++++++++ TIME

+++++++ 17:16:47

+++++++++ *
+
++++ *
+
+++++++ [phone]

+++++++++++++++++++++++++++
+
+++++
50 YEAR STORM ANALYIS FOR POND #1 - EXTENDED DETENTION STORM'WATER WETLANDS
PROJECT - JACKSON STATION STORWWATER MANAGEMENT PLAN
YEAR FLOWS TAKEN FROM CHARLOTTE, NC
5 IO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IT HYDROGRAPH TIME DATA
NMIN 1 MINUTES IN COMPUTATION INTERVAL
IDATE 22Aug 5 STARTING DATE
ITIME 0000 STARTING TIME
NQ 1000 NUMBER OF HYDROGRAPH ORDINATES
NDDATE 22 5 ENDING DATE
NDTIME 1639 ENDING TIME
ICENT 19 CENTURY MARK
Storm«ater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 2
• •
COMPUTATION INTERVAL .02 HOURS
TOTAL TIME BASE 16.65 HOURS
ENGLISH UNITS
DRAINAGE AREA
PRECIPITATION DEPTH
LENGTH, ELEVATION
FLOW
STORAGE VOLUME
SURFACE AREA
TEMPERATURE
SQUARE MILES
INCHES
FEET
CUBIC FEET PER SECO11D
ACRE-FEET
ACRES
DEGREES FAHRENHEIT

6 F.K + POST '
+ + DEVELOPME14T - BASED ON FUTURE ANTICIPATED DRAINAGE AREA
50 Year 6 Hour Rainfall
9 IN TIME DATA FOR INPUT TIME SERIES
JXMIN 5 TIME INTERVAL IN MINUTES
JXDATE 22Aug 5 STARTING DATE
JXTIME 0 STARTING TIME
SUBBASIN RUNOFF DATA
18 BA SUBBASI14 CHARACTERISTICS
TAREA .01 SUBBASIN AREA
PRECIPITATION DATA
8 PB STORM 4.92 BASIN TOTAL PRECIPITATION
10 PI INCREMENTAL PRECIPITATION PATTERN
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .00 .00
.00 .00 .00 .00 .00 .00 .00 .01 .00
.01 .01 .01 .01 .01 .01 .01 .01 .01
.00
.00
.00
.00
.00
.00
.00
.00
.00
.01
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 3

.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.04 .04 .04 .04 .04
.10 .10 .10 .10 .10
.07 .07 .07 .07 .07
.03 .03 .03 .03 .03
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .00 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
19 LS SCS LOSS RATE
STRTL .20 INITIAL ABSTRACTION
CRVNBR 91.00 CURVE NUMBER
RTIMP .00 PERCENT IMPERVIOUS A REA
20 UD SCS DIMENSIONLESS UNITGRAPH
TLAG .05 LAG
+++
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.02 .02 .02 .02 .02
.03 .03 .03 .03 .03
.05 .05 .05 .05 .05
.15 .15 .15 .15 .15
.05 .05 .05 .05 .05
.02 .02 .02 .02 .02
.02 .02 .02 .02 .02
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.01 .01 .01 .01 .01
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
.00 .00 .00 .00 .00
UNIT HYDROGRAPH
17 END-OF-PERIOD ORDINATES
19. 65. 103. 103. 80. 48. 30. 19. 12. 8.
5. 3. 2. 1. 1. 0. 0.
•

++++++++++++++
+ +
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 4
• • •
21 KK * POND
* *
23 KO OUTPUT CONTROL VARIABLES
IPRNT 4 PRINT CONTROL
IPLOT 0 PLOT CONTROL
QSCAL 0. HYDROGRAPH PLOT SCALE
IPNCH 0 PUNCH COMPUTED HYDROGRAPH
IOUT 21 SAVE HYDROGRAPH ON THIS UNIT
ISAV1 1 FIRST ORDINATE PU14CHED OR SAVED
ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED
TIMINT .017 TIME INTERVAL IN HOURS
ROUTE UPLAND DRAINAGE THRU WET POND (POND #2)
HYDROGRAPH ROUTING DATA
25 RS STORAGE ROUTING
26 SA
27 SE
28 SQ
1

NSTPS 1 NUMBER OF SUBREACHES
ITYP ELEV TYPE OF INITIAL CONDITION
RSVRIC 607.00 INITIAL CONDITION
X .00 WORKING R AND D COEFFICIENT
AREA .4 .5 .5 .6 .6 .7 .7 .8 1.0 1.2
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 616.00 622.00
DISCHARGE 0. 0. 1. 2. 2. 2. 12. 92. 736. 2233.

COMPUTED STORAGE-ELEVATION DATA
STORAGE .00 .46 .97 1.52 2.12 2.78 3.46 4.24 7.79 12.23
ELEVATION 607.00 608.00 609.00 610.00 611.00 612.00 613.00 614.00 618.00 622.00
RUNOFF SUMMARY
FLOW IN CUBIC FEET PER SECOND
TIME IN HOURS, AREA IN SQUARE MILES
PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF
OPERATION STATION FLOW PEAK AREA STAGE MAX STAGE
6-HOUR 24-HOUR 72-HOUR
HYDROGRAPH AT
Storm,,Nater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 5
s 0 •
+ POST 63. 3.18 5. 2. 2. .01
ROUTED TO
+ POND 2. 5.08 2. 1. 1. .01
+ 611.11 5.13
**' NORMAL END OF HEC-1 ***
Stormwater Quality Management Plan
Date: August 22, 2005
50 Year Storm Event
Page 6

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Individual Permit Application
Jackson Station II
Union County, North Carolina
Waxhaw, North Carolina
May 2005
©Kimley-Hom and Associates, Inc. 2005
Ilk ?, •Py ?1 ??oJP???
P
Kimley-Horn
and Associates, Inc.
- APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT OMB APPROVAL NO. 0710-0003
- (33 CFR 325/ Expires December 31, 2004
- The Public burden for this collection of information is sestimated to average 10 hours per response, although the majority of applications should require
5 hours or less. This includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and
completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of
- information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Service Directorate of Information
Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302; and to the Office of Management and Budget,
- Paperwork Reduction Project (0710-0003), Washington, DC 20503. Respondents should be aware that notwithstanding any other provision of law,
no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control
- number. Please DO NOT RETURN your form to either of those addresses. Completed applications must be submitted to the District Engineer having
jurisdiction over the location of the proposed activity.
- PRIVACY ACT STATEMENT
- Authorities: Rivers and Harbors Act, Section 10, 33 USC 403; Clean Water Act, Section 404, 33 USC 1344; Marine Protection , Research and
Sanctuaries Act, 33 USC 1413, Section 103. Principal Purpose: Information provided on this form will be used in evaluating the application.for a
permit. Routine Uses: This information may be shared with the Department of Justice and other federal, state, and local government agencies.
Submission of requested information is voluntary, however, if information is not provided the permit application cannot be evaluated nor can a permit
- be issued.
Ono set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
- application (see sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed
activity. An application that is not completed in full will be returned.
- (1TFMS 1 THRU 4 TO BE F1L L ED BY THE CORPS
- 1. APPLICATION NO. 2. FIELD OFFICE CODE 3. DATE RECEIVED 4. DATE APPLICATION COMPLETED
ITEMS BELOW TO BE FILLED BY APPLICAN
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5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE (an aoont is not reautred)
A. Perin Deveopment Company, LLC Todd St. John, Project Manager
6. APPLICANT'S ADDRESS 9. AGENT'S ADDRESS
12 Valley Place Kimley-Horn and Associates, Inc.
Chester, NJ 07930 PO Box 33068
Raleigh, NC 27636-3068
7. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
a. Residence a. Residence
908-879-4729 919-653-2950
b. Business b. Business
• 11. STATEMENT OF AUTHORIZATION
- I hereby authorize, to act in my behalf as my agent in the processing of this application and to
- furn ish, upon request, supplemental information in support of this permit application.
See Attached Agent Authorization.Letter

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APPLICANT
S SIGNATURE DATE
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NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY
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12. PROJECT NAME OR TITLE Isee insrrucrions.
Jackson Station II

- 13. NAME OF WATERBODY. IF KNOWN af-j ia. i 14. PROJECT STREET ADDRESS i/apgiceb/el
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Unnamed Tributary to Blythe Creek - way 16
Intersection of NC 1
- and Waxhaw Parkway

e 15. LOCATION OF PROJECT Waxhaw, NC
Union NC
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COUNTY STATE I

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16. OTHER LOCATION DESCRIPTIONS, IF KNOWN, tsceinstructions)

17. DIRECTIONS TO THE SITE
- From Charlotte, travel southeast on NC Highway 16 to Waxhaw, NC. Turn left onto
e Waxhaw Parkway. The retaining wall is on the left behind the CVS.

- N OR 4345, u 7 EDITION OF FEB 94 IS OBSOLETE. (Proponent: CECW-OR)

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18. Nature of Activity (oescrilrion of pro;ecr, include all fcwrures)
See Attached Report
19. Project Purpose (Describe rte reason or purpose of the project, see insrrucrions)
See Project Report
• USE BLOCKS 20-22 IF DREDGED AND/OR FILL MATERIAL IS TO BE DISCHARGED
• 20. Reason(s) for Discharge
• See Project Report
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• 21. Type(s) of Material Being Discharged and the Amount of Each Tvoe in Cubic Yards
- Approximately 14,000 cu. yd. of clean fill dirt
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22. Surface Area in Acres of Wetlands or Other Waters Filled (seeinsrrucriors)
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• 4,263 ft2 0.1 ac 188 ft. stream
• 23. Is Any Portion of the Work Already Complete? Yes = No U=j IF YES. DESCRIBE THE COMPLETED WORK
• None of the proposed work has been completed. However, other fill 6f streams/
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wetlands was completed under previous USACE Permits (attached)
24. Addresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (If more than can be entered here,
please attach a supplemental list).
Please See Attached List
25. List of Other Certifications or ApprovalslDenials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL' IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATF DFNIFn
.V,
ould include but is not restricted to zonina. buildina and flood Dlain Dermits
• 26. Application is hereby made for a permit or permits to authorize the work described in th. application. I certify that the information in this
• appiication is complete and ac urate. I further certify that I possess the authority to der ak th oak described herein or am acting as the
duly authotiza i mT\oAttfp alicant.
• SIGNATURE Gr Afj..JCANT DATE SIGNATURE (3F AGENT DATE
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The application must be signed by the person who desires to undertake the proposed activity (applicant) or it may be signed by a duly
authorized agent if the statement in block 11 has been filled out and signed.
18 U.S.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States
knowingly and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or
fraudulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious or
fraudulent statements or entry, shall be fined not more than $ 10,000 or imprisoned not more than five years or both.
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RE
MAY
KIMENVIRORN
AGENT AUTHORIZATION FORM
Name: A. Perin Development Companv
Address: 12 Valley Place, Chester NJ 07930
Phone: [phone]
Project Name/Description: Jackson Station
RECEIVED
MAY 0 4 2004
KIMLEY HORN
ENVIR.
Date:
The Department of the Army
U.S. Army Corps of Engineers, Wilmington District
Attention: Steve Chapin
Field Office Asheville
Re: Wetland Related Consulting and Permitting
To Whom It May Concern:
I, the current property owner, hereby designate and authorize Kimley-Horn and
Associates, Inc. to act in my/our behalf as my/our agent solely for the purpose of
processing of Section 404 permits and Section 401 Water Quality Certifications
applications and to furnish upon request supplemental information in support of
applications, etc. from this day forward until successful completion of the permitting
process or revocation by the owner.
Authorized this the .36-141day of04 !"1/ , J6D21
Ade[Ino Per ?1'1
Print Property Owner's Name
CC: Mr. John Domey,
N.C. Wetlands Unit
1650 Mail Service Center
Raleigh, N. C. 27699-1650
Property wner's Signature
Environmental Analysis
Jackson Station II
Union County, North Carolina
Waxhaw, North Carolina
April 2005
©KimIcy-Ilom and Associates, Inc. 2005
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Contents
1.0 Project Description .................................................................................................................... 3
2.0 Purpose and Need ................................................................................................................... .. 3
3.0 Alternatives Analysis .............................................................................................................. .. 4
4.0 Environmental Setting ............................................................................................................ .. 5
4.1 Ecoregion, Topography, Geology, Land Use ..................................................................... .. 5
4.2 Soils ..................................................................................................................................... ..5
4.3 Water Resources ................................................................................................................. .. 6
5.0 Biological Resources .............................................................................................................. .. 6
6.0 Cultural Resources .................................................................................................................. .. 6
7.0 Jurisdictional Issues ................................................................................................................ .. 6
8.0 Jurisdictional Impacts ............................................................................................................... 7
9.0 Mitigation ..................................................................................................................................7
10.0 Protected Species ...................................................................................................................... 8
11.0 Environmental and Public Interest Factors ............................................................................... 9
11.1 Physical/Chemical Characteristics and Changes .................................................................. 9
11.2 Biological Characteristics and Anticipated Changes .......................................................... 10
11.3 Human Use Characteristics Impacts ................................................................................... 10
11.4 Secondary and Cumulative Impacts .................................................................................... 11
12.0 Conclusion .............................................................................................................................. 12
13.0 References ............................................................................................................................... 12
Figures
Figure 1 Location Map
Figure 2 Existing Conditions
Figure 3 Proposed Fill Figure
Figure 4 USGS 1998 Color Infrared Aerial
Figure 5 Soils Maps - Union County Soil Survey
Figure 6 USGS Quad Map (Catawba NE 1988, Waxhaw 1988)
Figure 7 Conceptual Figure
Appendices
Appendix A 404 Permits, 401 Certification
Appendix B Letter from Town of Waxhaw
Appendix C Easement
Appendix D State Historic Preservation Office Letter
Appendix E North Carolina Ecosystem Enhancement Program Letter
Appendix F United States Fish and Wildlife Service and North Carolina Wildlife
Resources Commission Letters
Appendix G Site Plan for Entire Jackson Station Area
Kimley-Horn
i and Associates, Inc.
1.0 Project Description
Jackson Station II is a proposed mixed use development located in Waxhaw, Union County, North
Carolina (Figure 1). The entire, graded site is approximately 60 acres. As a result of the grading
there were impacts to streams. These impacts were permitted by the U.S. Army Corps of Engineers
(USAGE) and the North Carolina Division of Water Quality (NCDWQ) (See USACE Action ID
Nos. 200430917 and 200231378; DWQ Nos. 040732 and 021481 in Appendix A). The permanent
impacts to important channels were approximately 250 feet, and, as such, the USACE issued a
Nationwide No. 39 Permit for these permanent impacts.
This application proposes additional impacts to 188 feet of stream channel and 0.1 acres of wetlands
to backfill a retaining wall located at the Jackson Station II Site to remove most of the unforeseen
safety and liability issues created by the wall's existence. The amount of these impacts would cause
the total amount of impacts to exceed the 300 foot threshold allowable under Nationwide Permit No.
39, and, as such, requires Jackson Station to apply for an Individual Permit. The original purpose for
constructing the retaining wall was an attempt to remain below notification thresholds for a 401
Water Quality Certification and the subsequent requirement for stormwater management BMPs.
However, impacts associated with the development of the site eventually necessitated a written 401
Water Quality Certification from NCDWQ. Nevertheless, neither the USACE nor NCDWQ required
the constriction of the retaining wall to avoid or minimize impacts. Also, Jackson Station never
anticipated that it would desire to backfill the retaining wall and as such did not anticipate any need
for additional impacts other than those previously permitted.
The retaining wall is constructed of gabion baskets and is approximately 34 feet tall (Figure 2). The
height of the retaining wall itself creates some safety and liability risks. In addition to this, young
people have been seen climbing the wall on numerous occasions. Local Waxhaw officials have been
expressing their concerns to Jackson Station II regarding this issue on several occasions. The Town
has written a letter to Jackson Station II to document their concerns (See Appendix 8). As such,
Jackson Station II has determined that in order to adequately address the safety issues, it is necessary
to backfill the retaining wall so that the resulting wall height will be approximately five to seven
feet. It is assumed that reducing the height of the wall to five to seven feet would effectively address
all of the safety and liability issues by rendering the remaining wall as unattractive to climbers.
2.0 Purpose and Need
The purpose and need for the project is to remove the safety and liability issues created by the
existence of the retaining wall. Since its construction, the wall has been a source of concern for
Town of Waxhaw officials including the Town Manager and Chief of Police (Appendix B). Aside
from the fact that the wall is 34 feet tall, young people have been using the wall for climbing. In
order to render the wall unattractive for climbing and to leave it at a height that poses much less risk
to human safety, it is proposed that the wall be backfilled so that the maximum height is 5 to 7 feet
(Figure 3). In order to do this, it was necessary for Jackson Station II to secure a slope easement
from Henn Automotive, Inc. to constrict 2:1 side slopes sufficient to bury the wall so that only a
small section of wall would remain (Appendix C).
Kimley-Horn
and Associates, Inc.
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In order to do this, it will be necessary to discharge fill material into a sl
urban stream channel and wetland that exists between the driveway that
Automotive and the retaining wall (Figure 2). In order to backfill the w,
small stream and wetland area.
3.0 Alternatives Analysis
l section of degraded,
sses the stream at Henn
fill must be placed in this
No action: The no-action alternative would be to leave the wall in place allowing the safety and
liability issues to remain.
Fencing off the entire area: Fencing the entire area likely would be an ineffective means to
removing the overall safety and liability issues created by the wall. One of the main concerns is the
fact that young people have been climbing the gabion basket walls. As such, it is not anticipated that
a relatively small fence would prove effective at preventing the climbers from entering the area. The
existence of the fence may act as an additional challenge to the climbers. Also, the presence of the
fence would not address the issues created by the height of the wall itself.
The preferred alternative: The preferred alternative is to backfill the wa
• reduced to 5 to 7 feet. The resulting fill will remove completely approxim
jurisdictional stream and 0.1 acres of jurisdictional wetland. The fill slope
from the Henn Automotive driveway (Figure 3). Jackson Station II, LLC
• impacts by paying into the Ecosystem Enhancement Program in-lieu fee p
• runoff from impervious cover from the entire Jackson Station II developer
a previously approved extended detention basin or extended detention wet
• discharged. The extended detention wetland has been constructed. The fin

•

so that the wall height is
ely 188 feet of
sill meet the fill slope
ill mitigate for these
gram. All proposed
it will be treated through
nds prior to being
plans for the extended
? F1 KimleyHorn
and Associates, Inc.
wet detention basin have been approved; however, the basin is functioning currently as a
sedimentation basin.
4.0 Environmental Setting
4.1 Ecoregion, Topography, Geology, Land Use
The Jackson Station II site is located in the Carolina Slate Belt Ecoregion. The site is located at the
top of a watershed that flows into unnamed tributaries to Blythe Creek. The area consists of gently
rolling hills. Most of the site recently has been graded and stabilized for a multiuse development.
The Waxhaw area is developing rapidly. The areas south and west of Jackson Station II currently are
developed. The areas east and north are partly developed and partly forested (Figure 4).
Additionally, there are no aerial photographs that show the graded site. Appendix G contains a site
plan showing the entire site and location of the stormwater BMPs.
4.2 Soils
The NRCS Soil Survey of Union County, North Carolina maps the following soils as existing at the
site before grading had taken place (Figure 5).
¦ Udorthents (Ud): Udorthents consist of areas where the natural soil has been altered by
excavation or covered by earthy fill material.
¦ Tatum gravelly, silty, clay, loam (TbB2, TbC2): The Tatum series are deep, well drained,
moderately permeable soils on ridges and side slopes of uplands.
¦ Badin Channery silty, clay, loam (BdC2): The Badin series consists of moderately deep, well
drained, moderately permeable soils on ridges and side slopes in the uplands.
¦ None of the soils mapped by the NRCS Soil Survey are considered hydric in North Carolina by
the NRCS.
[]=F1 KimleyHorn
and Associates, Inc.
Since the purpose of filling the stream and wetlands is to remove the safety and liability issues
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4.3 Wafer Resources
• The Jackson Station 11 site is located at the top of a watershed of unnamed tributaries to Blythe
Creek in the Catawba River Basin (HUC 03050103) (Figure 6). The existing site has approximately
188 feet of unnamed tributary to Blythe Creek and approximately 0.1 acres of associated wetlands.
The stream was most likely a Rosgen classification Be type channel with a bankfull width of 2 to 3
• feet. However, these areas have been heavily impacted by urbanization and are cut off from the
® downstream riparian areas by the Henn Automotive driveway (Figure 2). As such, these systems
® have limited water quality or habitat value. The entire development site originally included 250 feet
• of important stream channel and 450 feet of unimportant stream channel. However, that stream
channel was filled using Nationwide Permit No. 39 (USACE Action ID No. 20231378; DWQ It
• 021481, Appendix A). Please see Appendix G for the overall site plan.
•
• 5.0 Biological Resources
•
® The Jackson Station 11 site has a highly disturbed wetland forest plant community. The dominant tree
species include yellow poplar (Liriodenderon tulipifera) and red maple (Ater rubrum). Tag alder
• (Ahius serridata) is the dominant shrub species. The herbaceous layer largely consists of
• microstegium (Microstegium vindneum), knotweed (Polygonum spp.), cattail (Typha latifolia), and
• soft rush (Juncus effitses). Typically this plant community would be a Mesic Hardwood community,
• however due to the disturbed, fragmented nature of the Jackson Station 11 site, it no longer can be
classified as such. The plants found at the Jackson Station 11 site have a facultative status of
facultative to obligate.
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• 6.0 Cultural Resources

• In correspondence dated March 11, 2005, the North Carolina Department of Cultural Resources
indicated that the Department was aware of no historic resources that would be affected by the
• project (Appendix D).
•
• 7.0 Jurisdictional Issues

• Wetlands: The existing Jackson Station 11 site includes approximately 0.1 acres of
headwater/riparian wetlands. The wetlands are a combination of herbaceous wetlands with cattail
• interspersed with a few black willows (Salix nigra) and a small wooded area with small diameter
• hardwood species such as red maple and yellow poplar. Immediately downstream of these wetlands
• is a driveway crossing that separates the wetland area from the downstream riparian areas (Figure
2). The wetland has been impacted heavily by urbanization and by sedimentation impairing its
biological functions.
•
A Streams: The stream that exits the culvert under the retaining wall has been culverted completely.
• The stream then flows 188 feet through the area proposed for fill before it enters the culvert at the
Henn Automotive driveway (Figure 2). The stream is separated from the downstream area by the
• Henn driveway. The stream has been impacted heavily by urbanization and sedimentation. As such,
• its biological functions have been impaired.
•
• WeyHorn
and Associates, Inc.
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8.0 Jurisdictional Impacts
In order to address the safety issues caused by the retaining wall, it would be necessary to fill the
stream and wetlands. Using steep, 2:1 side slopes, it would be necessary to fill virtually the entire
stream and wetland area as demonstrated in Figure 7. Under this scenario, it would be necessary to
completely fill the stream and part of the wetland in order to construct a dissipater. Although there
would be approximately 0.02 acres of wetland remaining, it likely would be impacted adversely by
the construction activities. Additionally, the remaining wetland would be very small and would have
almost no habitat or water quality value. More importantly, the long, steep (2:1) slopes that would
remain and extend down to the wetland area would serve as an additional sediment source for the
stream and wetlands below the driveway. If the area were filled completely, the steep slopes and
resulting sediment source would be removed, thus protecting the downstream reach.
Avoidance and minimization: The construction of the retaining wall was not required or suggested
• by either the USACE or NCDWQ. The functions of the existing stream and wetland below the wall
have been reduced greatly by urban stormwater discharge as well as by sedimentation. Also, this
system has been separated (isolated in a biological sense) from the wetland and stream downstream
w of the site by the Henn Automotive driveway, further impairing its biological and habitat functions.
• If the retaining wall were backfilled such that the remaining height of the wall were 5 to 7 feet and
side slopes constructed at 2:1, the remaining stream would be filled by the dissipater and the 0.02
® acres of remaining wetland likely would be impacted adversely by the construction activities
(Figure 7). Also, because of its small size and isolation, the 0.02 acre wetland would have negligible
habitat or water quality function. Additionally, the steep slopes that would remain under the above
41 scenario would be a sediment source to the streams and wetland areas below the Henn driveway
crossing despite stringent sediment and erosion control measures. The removal of the slopes (Figure
3) would reduce sediment input. As such, avoidance and minimization would not be achieved by
preserving the 0.02 acres of wetland that would remain as demonstrated in Figure 7. As such, the
applicant is proposing that the entire wetland and stream be filled as in Figure 2. Also, the applicant
is proposing mitigation for all of the wetlands and stream through payment to the EEP in-lieu fee
® program. The EEP has conditionally accepted mitigation for these impacts in their letter dated March
® 31, 2005 (Appendix E).

e 9.0 Mitigation
® Compensatory - The applicant proposes compensatory mitigation through the purchase of 188 feet of
® stream mitigation credits and 0.1 acres of wetland mitigation credits from the EEP (Appendix F).
® Please note that the minimum incremental payment that EEP typically accepts for wetland mitigation
payments is 0.25 acres.
r
0 Non-Compensatory - All impervious cover generated by Jackson Station II will be treated to 85%
41 TSS removal though an existing extended detention wetland or a proposed extended wet detention
basin that is currently function as a sediment basin. Both of the BMPs were approved as part of the
404/401 Approvals USACE Action ID No. 200231378 and DWQ No. 021481, Appendix A. See
® Appendix G for the location of the BMPs.
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K rnleyHorn
and Associates, Inc.
10.0 Protected Species
According to the U.S. Fish and Wildlife Service (USFWS), there are two endangered species
occurring in Union County. The endangered species are the Carolina heelsplitter (Lasntigona
decorata) and Schweinitz's sunflower (Helianthtts schiveinitzii). The NC Natural Heritage Program
(NCNHP) lists another eight species as endangered, threatened, or of special concern potentially
occurring in Union County. A review of the NCNHP database of documented occurrences did not
reveal the presence of any of the aforementioned species within a one-mile radius of the site. Much
of the Jackson Station II site has been cleared and graded for development. Preliminary field
investigations did not identify suitable habitat for any of the species listed as federally endangered or
federal species of concern.
In its letter dated April 8, 2005 (Appendix F), the USFWS specifically indicated the possible
existence of habitat suitable for the Schweinitz's sunflower as well as the Georgia aster, Aster
georgiaturs (which is currently not listed). This was based on the site location provided by Jackson
Station II and Union County GIS aerial photography. However, the site was mass graded after the
aerial photographs were produced (USAGE Action ID No. 20231378; DWQ # 021481, Appendix
A). This includes all of the side slopes adjacent to the retaining wall and surrounding the stream and
wetland area. This fact was not clarified in our original correspondence with to the USFWS.
The Carolina heelsplitter (Las, tigona decorate) is known to occur in six small streams and one
small river. The substrates of these streams consist of mud, muddy sand, or muddy gravel, along
stable, well-shaded stream banks (Keferl and Shelly, 1988; Keferl, 1991). The stable stream banks
appear to be important factors for species habitation. The disturbed nature of the Jackson Station II
site discounts it as suitable habitat for the Carolina heelsplitter. The stream segment proposed to be
impacted is enclosed completely by a culvert upstream of the site and bounded by another culvert
immediately downstream of the site. The banks of this small stream are minimal and not stable.
Enclosing this stream segment will help limit sediment input from the steep, long slopes that border
the stream. Biological conclusion: No effect.
Sehweinitz's sunflower (Helianthus schtiveinitzii) prefers roadsides, power line easements, old
• pastures, woodland openings, and other sunny or semi-sunny areas (USFWS 1994). This species is
threatened by residential and industrial development, fire suppression, highway construction, and
maintenance activities in roadside and utility rights of way. (USFWS 1994). Due to the recently
disturbed nature of the Jackson Station II site, the limited amount of proposed land disturbance to
remove the retaining wall, and the fact that no individual occurrences of the sunflower were noted at
• the site, backfilling the retaining wall will have no effect on Schweinitz's sunflower. Biological
conclusion: No effect.
The North Carolina Wildlife Resources Commission (NCWRC) indicated that there are records of
the state-endangered Carolina creekshcll (Villosa vaughaniaua) in Blythe Creek (Appendix F).
Additionally, there are records for the species of state special concern, the Carolina darter
(Etheostoma collis) and the notched rainbow (Villosa contricta) that have occurred in the East Fork
of Twelvemile Creek, which is tributary to Blythe Creek. Both the NCWRC and the USFWS have
expressed concerns about temporary and permanent impacts as the result of this project, both during
and after construction. They also recommended that the guidance provided in the Guidance
Memorandum to Address and Mitigate Secondary and Cumulative Impacts to Aquatic and
K rnleyHorn
and Associates, Inc.
Terrestrial Wildlife Resources and Water Quality (August 2002) be used to mitigate environmental
issues created by the project.
Although Jackson Station II physically cannot achieve many of the recommendations, Jackson
Station II agrees to provide the best practicable technology for controlling sediment from the
retaining wall backfill area during constriction. Jackson Station II will use settling basin(s) sized to
the latest Division of Land Resources Guidance. The settling basin(s) will make use of geo-textile
baffles, PAM logs, and Faircloth-type skimmers for the outlet. Jackson Station also will stabilize all
exposed areas with an appropriate geo-textile matting and seeding within 24 hours of completing the
fill. All practicable measures will be taken to protect the downstream resources.
All post construction impervious cover on the Jackson Station property will drain to an existing
extended detention wetland or an extended detention wet basin that have both been designed
according to the NCDENR Stormwater Best Management Practices Manual.
11.0 Environmental and Public Interest Factors
11.1 Physical/Chemical Characteristics and Changes
Substrate: Most of the Jackson Station site has been disturbed and re-stabilized previously. The
proposed backfill of the wall will require significant changes to the immediate topography; however,
because the fill area is relatively small there will be no significant changes to the general substrate of
the entire site from this activity.
Currents, circulation, and drainage patterns: There should be no significant effects on currents,
circulation, or drainage patterns because of the relatively small area of impact.
Suspended particles and turbidity: The Erosion and Sedimentation Control Plan will be
vigorously implemented. Also, once completed and stabilized, the area should produce less sediment
since there will be a decrease in the amount and length of steep earthen slopes that discharge directly
to surface waters. See Section 10, above.
Water quality: As part of previous 404/401 permit requirements, all proposed runoff from '
impervious cover from the project will be treated through an extended detention wetland and a wet
pond. Additionally, the project will eliminate a large amount of steep side slopes reducing sediment
inputs.
Flood control functions: Discharges from onsite runoff from impervious covers will be attenuated
through stormwater ponds/wetlands.
Storm, wave, and erosion buffers: Not applicable.
Aquifer recharge: Due to the small scale of the proposed wall backfill, no significant effect is
anticipated on aquifers.
Kimley-Horn
i and Associates, Inc.
Baseflow: Due to the small scale of the proposed wall backfill, no significant changes to base flow
are anticipated.
11.2 Biological Characteristics and Anticipated Changes
Special aquatic sites: Unavoidable impacts to streams and wetlands will occur. However, because
of the fragmented, disturbed nature of the area proposed for fill, the impacts should be minimal.
Compensatory mitigation will be provided for the impacts.
Habitat for fish and other aquatic organisms: Because of the fragmented nature of the area
proposed for fill, the impacts should be minimal. Compensatory mitigation will be provided for the
impacts.
Wildlife habitat: Because of the fragmented nature of the area proposed for fill, the impacts should
be minimal.
Endangered or threatened species: See above.
11.3 Human Use Characteristics Impacts
Existing and potential water supplies: The wall backfill should have no impact to existing or
potential water supplies.
Recreational or commercial fisheries: No effect.
Other water related recreation: No effect.
Aesthetics of aquatic ecosystem: No effect.
Parks, national, and historic properties, etc.: No effect.
Traffic/transportation patterns: No effect.
Energy consumption/generation: No effect.
Navigation: No effect.
Safety: The backfilling of the wall will improve greatly public safety. Public safety is integral to the
purpose and need of this project.
Air quality: No effect.
Noise: No effect.
Historic properties: No effect.
Land use classification: No effect.
7 t Kimley-Horn
and Associates, Inc.
Economics: No effect.
Property values: Property values of the immediately adjoining properties may increase.
Regional growth: No effect.
Tax revenues: If the adjoining property values increase, tax revenue may increase also.
Employment: No effect.
Public facilities: No effect.
Business activity: Not applicable.
Prime and unique farmland: No effect.
Food and fiber production: No effect.
Water quantity: No effect.
Mineral needs: No effect.
Consideration of private property: No effect.
Community coliesion: No effect
Community growth and development: No effect.
Relocations: No effect
Recreation: No effect
11.4 Secondary and Cumulative Impacts
Generally, geomorphic assessment follows the Monitoring Level I procedures described in the
Stream Mitigation Guidelines (April 2003). Two permanent riffle and two permanent pool cross-
sections will be established as shown in the Restoration Plan. Pebble counts also will be conducted
at the cross sections. A longitudinal profile also will be conducted. The monitoring will be
conducted each year for the 5-year monitoring period. In order to show success, the data should
show no significant aggradation or degradation and should show no unexpected changes in
morphology.
Kimley-Horn
and Associates, Inc.
12.0 Conclusion
The backfilling of the retaining wall at Jackson Station II effectively will remove the unanticipated
safety and liability issues the wall has created. The Town of Waxhaw staff support backfilling the
wall. The environmental impacts will not be significant due to the small area of impact, especially
considering the fact that compensatory mitigation will be provided. Jackson Station 11 is already
required to treat impervious surfaces created by the development as on-site measures to mitigate
water quality impacts. However, the backfilling of the wall itself will result in the removal of steep
side slopes, which in turn should reduce sediment input to downstream areas. If allowed to proceed,
the backfilling project will improve public safety.
13.0 References
Keferl, E.P. 1991. "A Status Survey for the Carolina heelsplitter (Lasmigona decorata), a Freshwater
Mussel Endemic to the Carolinas." Unpublished report to the U.S. Department of the Interior,
Fish and Wildlife Service.
Keferl, E.P., and R.M. Shelly. 1988. "The Final Report on a Status Survey of the Carolina
Heelsplitter, Lamigona decorata, and the Carolina elktoe, Alasmidonta robusta." Unpublished
report to the U.S. Department of the Interior, Fish and Wildlife Service.
United States Fish and Wildlife Service. 1994. Schweinitz's Sunflower Recovery Plan. U.S. Fish and
Wildlife Service. Atlanta, GA.
KimleyHom
i %` and Associates, Inc.
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Title Location Map
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Prepared For Union County, North Carolina
Jackson Station II, LLC. Date Project Number Figure
4/18/05 012538002 1
H-.\PN\012538002 Jackson Station IP\Env ronm 1ar\Figures\js2_figwss_03-07. doc Prepared by Jason Diaz ;? It i "=K
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Prepared For Union County, North Carolina

Jackson Station 11, LLC. Date Project Number Figure
4/18/05 012538002 5
11.'PN,012538002 Jackson Station 1FEmironmcntal FiguresJs2_figures 03-07.doc Prepared by Jason Diaz K m

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North Carolina
Prepared For. ,

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Date Project Number Figure
4/18/05 0 l 2538002 6
11.`PN,012538002 Jadson Station I WLmironmentar Figures js2figures_03-07 doc Prepared by J. on Diu

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• U.S. ARMY CORPS OF ENGINEERS
• WILMINGTON DISTRICT
• Action Id. M0430917 County T lnion Quad WAXHAW
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property owner: A. Perin Development Company, Att'n: Mr. Adelion Perin
Address: 12 Valley Place, Chester, NJ 07930
Telephone No: [phone]
Zone: 44 UTM or LAT/LONG: North: 3866642 East: 476309
Size and Location of project (eater body, road name/number, town, etc.): Jackson Station Server Line Extension
project located on 38.67 acre tract on the east side of NC 16; north of Waxhaw
Description of Activity: Install approx. 3,832 LF of sewer line to serve a commercial development. As part of.
the project, it will be necessary to cross unnamed tributaries at four locations and Blythe Creek at one
location. No wetlands will be impacted. Crossing areas will returned to original grade and stabilized.
Applicable Law: -X- Section 404 (Clean Water Act, 33 U.S.C. 1344)
(check all that apply) Section 10 (River and Harbors Act of 1899)
Authorization: __NW 12 Nationwide Permit Number
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 activity 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 Water Quality, telephone [phone]. For any activity within the twenty
coastal counties, before beginning work you must contact the N.C. Division of Coastal Management, telephone (919)
733-2293.
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 perrrtittee 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 pernrittee 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.
If there are any questions regarding this authorization or any of the conditions of the General Permit or Nationwide
Permit, please contact the Corps Regulatory Official specified below.
Date: June 10- 1004
Corps Regulatory Official: Stephen D. Chapin
Expiration Date of Verification: June 30. ?006
cc: Kimley-Horn and :associates, Inc. (Mr. Todd St. John)
CESAW Form 591
Revised July 1995
Telephone No.: [phone] x 224
RECEIVED
JUL 0 7 [004
KIMLEY HORN
ENVIR.
p?0? W AT ?q
r
>_ 1 LJ W \J_ ::I

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
May 13, 2004
Union County
DWQ Project #: 04-0732
APPROVAL of 401 Water Quality Certification and AUTHORIZATION CERTIFICATE
A. Perin Development Company
Attn: Mr. Adelion Perin, Managing Member
12 Valley Place
Chester, NJ 07930
Subject Property: Jackson Station, Waxhaw, NC on Highway 16 South
Dear Mr. Perin:
You have our approval, in accordance with the attached conditions, to impact 100 feet of waters for the
purpose of installing a sewer line as you described in your application dated May 4, 2004. After
reviewing your application, we have decided that this fill is covered by General Water Quality
Certification Number 3374, which may be viewed on our website at
http://h2o.enr.state.nc.us/ncwetlands. This certification allows you to use Nationwide Permit Number
12 when the Corps of Engineers issues it. 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, Coastal StormwaYer, Non-Discharge and Water Supply Watershed regulations. This approval
will expire';wtien-the accoml3anying 404 or CAlVIA permit expires unless otherwise specified in the
?...i ...
General Certification.
This approval is only valid for the purpose and design that you described in your application except as
modified below..;- Ify.'ou}'change your project, you must notify us and you may be required to send us a
new application. If 'the property is sold, the new owner must be given a copy of this 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) (6) and (7). This approval shall expire when the corresponding
Nationwide Permit expires or as otherwise provided in the General Certification. For this approval to
be valid, you must follow the conditions listed in the attached certification and any additional
conditions listed below.
Conditions of Certification:
Certification of Completion
1. Upon completion of all work approved within the 401 Water Quality Certification or
applicable Buffer Rules, and any subsequent modifications, the applicant is required to return
the attached certificate of completion to the 401/Wetlands Unit, North Carolina Division of
Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650.
wr4T
t,??D EIvR
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), (http://h-o.car.state.nc.us/ncwetlauds
•

i
_
(i1L 1
f
.
M'z1.MI' G70N DISTRICT
• ..
?ction.Id: 30i}?;1:?/? Count} Lil?ion 1

A ENZER L 1? "•LAl TCRECrOT AL `IND 1/'~T.CC21?l?G'3D2:)t'L ?[-1tIC I i.U;r

v Qun ;: EF.Iillaw DCYc op.-neni Purtrle?S, a.ttln: )L`r371 DE.Simvue .
t:
• :\ct(1rL$:i: `?.7?i} ?l,'_?i). Ti?Clt ?1'.. .
C 23175

i
• r

1•
.,?.c 3c;i! I_ci;acuri o, ,:v?cct iw27,c*.body, road DnSt1L'inL)IDUtir, iUW.^., etc.). .
v:3ia• t=(s at Jackson Station tug.. catc'd on 38.67 acre tract
.?.
17L'SCri? i7pn l`1?ACtll1[a: - -

• -n«?i`C't 8 550 F 01 tilil'ufl tributary to Blythe ?.redl,SorAhe a' ose of

ll) IIa.approx. o?, _ : an ulli)
V.P.
•
CortS!"itCl:Illn a Ill:l pi it1a 1nv: (22):ttn pct d rox. 700 LF of. an uul'ItIIIL'Cltributar i.

•

1111por ra]l?'? aquatic function) for beep xpose of
i)IZ=a1Z ' CYCek{ (fluert7idbd fti.ilZDC "I
11
• .1CCf7r; *llVfllaiilb'ahC CUIIStTllCtIOII of a SlOiillriut°r reillTllCl3t f:1^Illtj' (.J E0 acrC pond).
MI`? "0AT1ON tfi offset the IosS of 25% ,m ortant" stream chaIniel will_ bG
aCC'1IMplIShCC1 tell Ole ll f)3fIr:CIlt It1tO th£'VC We:ialtd Restoratipxlt Pr grara ONT.,} 'tind:,at. a

1_:f z.:i,3, S1trFIClt;llt t0 pCl2arnl'?0Li.of uaruz satyr sEri te?tora#loil:itl .tllc €>ataivh?T
Rive' basin. Coilsf6ictiUU F?il}tlri Fr:ICor& Of tllf•.Yt S:.:st1a11.be-lr1 Olaf y:.Llt£r I)ertTllEtC£ ilaS
. ,l1.7t3e full .payznt rt to tLie J T i the i'i?i?.P has 1Sro??iflecl «rltiea cotllirmation<to the: Corps

SLrRi11ITTED
of Eli-inecrs. ALL `rVORti-_,,vjuS'r-BF DONTF ITS ACCOPD 4.NCE WITH
PLANS.
•
r?pp1: t;le I_avv:. N' Section 444 (C1eaiMiter ,pct, 33 U.S.C.1341).
(du :d: all that apply) T Section 10.(River and Harbor Act of 1$99),
•
AU111orization:.; ? f e ioilal Gcncral Perinit Numbcr.
39 Nationwide Perrait 'Number.
Your \vork is authorized.bv this _RcftianaP General (RGP) rir Natioinxi; Ptnnii (N«rP) provided it is .
accomplisherd in strict accordance tie*iih thu amtched condltlons and-your submitte.d glazes. If your 3cd.\,itiy is

suh;ect to Section 404" (if Section 404 block.above is che:ked), E;efore beairining v:orl: you ruust also rt:Ce:ve.a
Section 401 water qualiR' certification from the N.C. Division.o, Envircrtltertal l?lttnz"emenr; tcLcphont (919)
733-7786. For anv activity..«ithin Che rvvcnty coastal counties, before (r ?fintting work you must contact rbe
C
oas:aI 112tulagert ent, [elephatln [phone].
N.C. 13ivision of
• 1'le:;sc read uld carefully comply witli the attachcd conditions of the RGP or N'WP_ Any viohdon of the
conditions of the RGI1 or thcc NA VP rcfer:nced above may. stlbj:xt th F? rnsittt4_ to a stop :work. ordt r, a
• restara emit order, andior appropriate legal acfion.
• 'T u:' D:;p::r tt z nt of RGr' or NV VP ti•erification do: s rot r::'lie; e the t,el rlittee of lh rcspntisibi ity to
auther r:i1uircd Fcdcr;:l: State, ar local approvals1porinits. The penniit:e mlav rtetd to contact
• „ppropriare State and local agencies before buginnin°_ )vork.

•
•
if ,ice. aie any ,?u stioru rcRarc'ang dais ua#?iaF anon: ar my of the conditions u. the General PernTit..c;
;%aticnWidc Pcmut, plcast con ict.U:e Carps; Rcaututor 41'fizUa sp=ifed bziow.
phon No ::(SZ3) 2??-79ai?
:Corps Rc ulatcri Official Stec Chat t Tel'
Expiration lla;i. of Vcrifcation November 1:.2004
cc: Mr.. Leonard S P.uid?er
roll, 1vCI) 1619 ii: it Service Ceater,.T{alei ;h,'NTC 27699-1619
i6ir. iZUn Fe,
:.
.
CrSA k-, s91
M•jch.: d F. P3slvy. Govt=-
?O? W ATFA Wiilawn G. Roar If.. sae ncry
p/ Ncu%h Clrolhm MpU=Ant or l aviman=t alld Khtu=1 P--Ow=
y Aran W. "w,&. P.E.. Dircuwr
r; Divisica of wula Quality
> 'f Cole= 11. sutliwi. DcptltY Dilutor
DiVLim of Wacx Qulliry
FATMAR Development, LT-.C
4508 East Independepce Blvd-, Suite 205
Charlotte, NC 28205'
SUBJECT: APPROVtILL of 401 Water Quality Certification wlfh•Additional Conditions
PATMAR Development, LLC
Jackson Station ,
DWQ Prc jt;ct -# 02-1481
Waxliaw
Union County
October 8, 2003
W D= Sir.
• On Septembef 16, 2002, the Division of Water Quality received a Pirrconstruction Notification
Application fortho project known as Jackson Station. On October 1, 2002, October 15, 2002, October 17, 2002,
• and December 19,266i DWQ staff canfirmed surface water .standard violations ongoing at the subject project.
On January 21, 2003, the Mooresville Regional Office m.ceived.a restoration plan for these impacts. On
September 5, 2003, DWQ staff confirmed restoration etfarts had been satisfactorily implemented with the
exception of the completion of riparian zone plantings near the ?ablou wall Accordingly, this water quality
certification for this project may now be issued pursuant to 15A NCAC .0506 and .0507.
You have ourlapproval, in accordance with tho attached conditions (WQC #f 3402) and the additional
conditions below, to dkcharge fill into to 950 linear feet of stream for the construction of Jackson Station and
• Villages at Jackzoa Station, near the Town of Waxhaw ia.Union County. This activity mast be conducted as
indicated in your applicarjoa received by the Division of Water Quality on Se n=nber 16, 2002.
This certification allows you to use Nationwide Permit Number 39 when the Corps of Engineers
issues it. 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, Coastal Stormwater, Non-
Discharge and Watci Supply Watershed regulations. This approval will expire when the accornpanying
404 or CAMA 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
except as modified below. If you change your project, you must notify us and you may be required to
send us a new application. If the property is sold, the new owner must be given a copy of this
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 describedtin ISA NCAC 2H.0506 (h). For this approval. to be. valid, you must follow the
conditions listed in the attached certification and any additional conditions listed below.
1. In order to prevent!violations of the turbidity standards (50 NTLrs in streams and rivers not
dcsign=d as trout waters by DWQ; 25 NTYTs in all saltwater classes, and all lakes and
reservoirs:) frill compliance with the Division of Land Resources or a local dclcgdted Sedim .nt
w and Erosion Control Program is required.
• N. C. DM&ion of Water Qualiry, 401 Werkoas C&-6 ^oo Uuit.
1650 Mail seivix Costae ltaliagh, NC 37699-1650 (l?lliag Adrlress)
. 2321 CabincBlvd.. Ralaie h, NC 27604-22(0 iLoatioa)
Y/1+2n ers *uL n us/ocwe Lnrisl
[phone] (phone), 919-733.6893 (fill (him
• _ Cusw?,a Sa•vs:e i`. 1-87'7-6Z3?746
PM
Jackson slution
pWQ # 02-1481 .
Page 2 of 3 ices and
2. Approved erosion and sedimentation control dev practices whiacuh Eequal or rosion eControl
those outlined in tha most recent version of the "North Carolina Sedimezu
mmin eal g Manual" shall be (availa Pbop?m
Planning and Design Manual" or the "North Carolina surface
the Division of Land Resources in the DEHNR Regional
implem mated.
3. Sufficient materials required for stabilization midlorrepair of erosion control measures and
stotmwater routing and treatment shall be on site at all times.
4. All erosion and sedimentation control measures placed in wetlands or waters shall bo
restored after the Division of Land Resources Car delegatFd
removed and the natural grade is der=6=2 to stabilized.
program) releases the project ar the project
5. Waste, spoil or fill. shall not be placed, dumped or located to wetlands, waters, riparian areas
beyond the footprint of the impacts as depicted in Pre-Construction Notification Application
dat:d Septnmbn 9, 2002.
6. A final, written stormvnater mr agement plan must be provided to this office within 60 days
of receipt of this 401 Water Quality Certification. The stormwater management plan must
include plans and specifications for stormwat--Tm=ageL°;it:facilities designed to rernove. 8514'
TSS according to the most recent ver:.on of the, NC PIS DENR Sgtorm:,.?a= Best
? ponds orgextendcd
Manual. This approved appro a mfg b this office litfore prior to any new perman=t
butcndoa wetlands. shall tb be Sparec sin sate. writing,
a shed and notarized Operation and occupi Nlsintensuildingsnceare-Agamcut must: also be provided-
?m
7. Sta mwater Tn nagemant facilities shall be constructed Sad optional before any now
perman; nt building is occupied at the subject site. The structural stormwatcr practices :s
approved by this Office as wall as drainage Patterns most be maintained in perpetuity. No form
changes to the structural stortnwater practices Shall be made without written authorization
the Division of Watmr Quality.
S. Mitigation must be provided for the proposed impacts as specified below. We understand
that you wish to make a paymeat to a fund administered by the NC Wetlands Restoration
uircmen . This has been deternuir..^-d by the DWQ to
Progam (WRP) to nn--ct this mitigation req
be a suitable method to meet the mitigation requirement. This contribution )011 satisfy our
compensatory mitigation requirements. Until the WRP receives and clears your check(miade
payable to: DHNR -Wetlands Restoration Program Office), no impacts specified in the
authorization Certificate shall occur. Ivfr. Ron Ferrell should be contacted at [phone] if
you have any questions concerning payment in to the WRP. You have one month from the date
of this approval to make this payment-
-ILL CJ I u r w.--.- --
steam: 250 feet (©$125.00110
030838
S31,250.00
(Note: On December 20, 2002, an invoice has already be.°n provided to you cLEailing the
amount of paypmmmt. Records tndicat" as of th-- date of this Ceramcation payment has not
been received.by WRP• please see attacbm: nt.) •
9. Upon completion of all work approved within the 401 Water Quality Certification and any
subsequent modifications, the applicant is required to return the attached certifica-- of completion
Jackson Station
DWQ # 02-1481
Page 3 of 3 1650 Mail Service Center,
to the 401/Wetlands Unit, North Carolina Division of Water Quality,
Raleigh, NC, 27699-1650.
additional Fell' State and Local regulations applicable- to your
Please keep in: mind that there may b,
project, such as the Sedimenzation and Pollution Control Act, Non-Discharge and Water Supply ouro ct. In
Regulations, whereby you may be required to obtain permits and/or approvals prior to beginning y P j'
addition, this approval will expire when the accompanying 404 Per nit expires unless otherwise specified in the
General Certification..
This approval'is only valid for the purposes and designs that you described in your application and
subsequent modificatibu. If you change your Project, you must notify the Division in writing and you maybe
required w submit a ngw application for a new Certific Lion.
If the prop=Et 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 weiland fill for this project (now or in the future) exceeds one acre, compensatory mitigation may
be required as described in 15A 14CAC 2H .0506(h).
If you do not 4ccept any of the conditions of this Ce.ttificntion, you may ask far an adjudicstory ha:aing.
You must act within 60 days from the date of receipt of this letter. To request a hearing, send a writinn petidon
that conforms to Chnpler 150B of the North Carolina General Statutes to the Office of Administrative Hcarings,
6714 Mail Service Center, Raleigh, NC 27699-6714. This Certification and its conditions are final and binding
unless you request a hearing.
This letter completes the review of DWQ Project 4021783 by the Division of Water Quality under
Section 401 of the Clem Water Act. If you wish to review any of the W: ter Quality Regulations wzntionrd here.
you can downlc id a cgpy through the 401/Wetlands Unit web site at hayWh20 ear state ne.us/newednnds. If you
have any questions, phase contact Mr. Alan Johnson at 704 633-1699 or Mr. Danny Smith at 919-733-9716.
Sincerely,
(??"eY4
Alan W. Klimek, P.E
Attacbniants: GC 3402 (March 2003), COC !
Ids
cc: Ashville Regulatory Field Office, USACB
Wetlands= L• Unit Central Office-Danny Srnith,
Central Files
• File Copy
MRO-Division of Water Quality, Alan Johnston
Leonard lZinclRer, Patvironn=t? planning Consultant, 3714 Spokeshave Lane
Matthews, NC 28105

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6 ®?u/13/2005 11:53 FAX [phone] Concrete Construction Z001
?? 0 13 :167
as,JLZO
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April 4, 2005
TOWN OF WAXHA'vV
P.O. Box 6
317 N. Broome St. - Waxhaw, N.C. 28173
Telephone [phone] - Fax [phone]
Hours: Monday - Friday - 9:00 a.m. to 5:00 p.m.
www.waxhaw.com
Jackson Station
Removal of Existing Retaining Wall
To Whom It Mlty Concern:
MAYOR
Wm. GARY UNDERWOOD
TOWN COMMISSIONERS
DAVID G. BARNES
MARTIN G. LANE
SYLVESTER E. McMANUS III
TAMMY G. NORWOOD
MICHAEL D. SIMPSON
TOWN ADMINISTRATOR
MICHAEL D. SIMPSON
TOWN CLERK
BONNIF. S. McMANUS
704-943.2195
TAX COLLECTOR
MARION P. MORTON
709-843-7704
The Town of N, axhaw has asked Mr. Charles Thornton. with Jackson Station about the
removal of an existing retaining wall that is associated with a headwall at an existing
creek. We feel That this wall and headwall pose a serious safety issue and we would
recommend thac it be-removed and piped-
Should you have any questions or require any additional information please feel free to
contact me at town hall.
Sincerely,

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Jim Price
Town Engineer
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NOTFS,
MIS S RWY fS Of AeMrR CATFOCl9Y, SUCH AS
1 nT R=V8,YU 77CH OF M17,VC PARCfM A
cma -QA:tF£O amity, OR Ow? FXCYPTOI
TAX PARCEL # 05141006E 70 t?ti DET710T/a' Cr :1JEU71S =,
• C ADD ifALTY GRG W INC 77as PLAT XAY 62" sVd,EOr TO FAs£NLYJs £TTH,.7
6634 OLD STATESVILLE RD, RELG+ZLYD OR xmum,
CHARLOTTE, NC 28269
TAX PARCEL 0614100bF Tl a NOT A - SCMDARY rtl F%T SLl7VfY Dr A{£ LAND
E P NI58ET CJ SiY7MN 1 fF£tkJ 1T(F FY7F?0 OF Tntr SUR5E1' TS
1818 BAXTER ST. , CAMR ?MDIT ?Y CF A Q7IFRaL iY1oLfC uTtuTY
CHARLOTTE, NC 2$235 R.'Or riA ra it ASSOaA 7FS HAS FfRrPW-rD !!0
NJ7' Ba r,DArtY sWti£1 BLYAOJARY h1SORVATX TAKJ!
1 q ?, fA04 CO.WRLW SOiX,' -
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TAX PARCEL j 06141043
TAX PARCEL Jj 06141048 'RILL, WAYNE JR. do VIF REBECCA P.
7517 PROVIDENCE FARMS RD.
t °J N HENN. AUTOMOTIVE, LLC A`AXHAW NC 28173
t ` '! 1152 BROOVE ST.
WAMAVI, NC 28173 \
03 1084 PG 107
TAX PARCEL bb 06141042
SLOPE EASEMENT KDS F WATSON. YdLL?tAM H. & AT NANCY
S60'15'04'W 5,594 SF !ST.127 . CDR.
19.00' N6D'15'04'C ` SIMON s10?15 CA 31522
1 S60.12'S5'W 29AD'
10.01 NP9'44'9F'V PfM rW \
46.DB
S2?'45' ?'F _ _179.06' 3P1.50'
1 207.61' / W?-9'44'56'V 500.56' TOTAL
S29'43'34'E
TDT. 66.98' S60'00'40'W TAX PARCEL # 06141018B
GRAPHIC SCALE 9.99' JACKSON STATION II LLC,
100 0 w im 7o! TAX PARCELATId 06WD16A
y1 JACKSON ST ON II, L•L.C,
12 VALLEY PLAC`
CHESTER, NJ DnM
12 VALLEY PLACE
CHESTER W 07530
( IN' FEE'S )
1 inch = IM EL <<'' - "''?r,

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TAX PARCEL # 06(41041
&TNER, KENVE-M L
& YiF „UUE R.
301f BLYTHE ROAD
\V/AXHAIY, NC 23173
PROPOSED SLOPE EASEMENT
oa
JOY ilf.C Yq PROPERTY OF HENN AUTOMOTIVE
Na
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As e.ALT aA_2
SANDY RIDGE TOMSHIP
UNION COUNTY, NORTH CAROLINA.
CAI. G ASMC 0.4&
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?A STATE o
North Carolina Department of Cultural Resources
State Historic Preservation Office
Peter B. Sandbeck, Administrator
Michael F. Easley, Governor
Lisbeth C. Evans, Secretary
Jeffrey). Crow, Deputy Secretary
Nfarch 11, 2005
Todd St. John
Kimley-Horn and Associates, Inc.
PO Box 33068
Raleigh, NC 27636-3068
Re: Jackson Station II, Waxhaw, Union county, ER 05-0404
Dear Mr. St. John:
Thank you for your letter of February 24, 2005, concerning the above project.
Office of Archives and History
Division of Historical Resources
David Brook, Director
We have conducted a review of the proposed undertaking and are aware of no historic resources which would
be affected by the project. Therefore, we have no comment on the undertaking as proposed.
The above comments are made pursuant to Section 106 of the National Historic Preservation Act and the
Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CFR
Part 800.
Thank you for your cooperation and consideration. If you have questions concerning the above comment,
contact Renee Gledhill-Earley, environmental review coordinator, at 919/733-4763. In all future
communication concerning this project, please cite the above referenced tracking number.
Sincerely,
Icy u 0-~
eter B. Sandbeck
RECEIVED
MAR 16 2005
KIMLEY HORN
ENVIR.
Location Mailing Address Telephone/Fax
ADMINISTRATION 507 N. Blount Street, Raleigh NC 4617 Mail Service Center, Raleigh NC 27699-4617 [phone]/733-8653
RESTORATION 515 N. Blount Street, Raleigh NC 4617 Mail Service Center, Raleigh NC 27699-4617 [phone]/715-4801
SURVEY & PLkNNING 515 N. Blount Street, Raleigh, NC 4617 Mad Service Center, Raleigh NC 27699-4617 [phone]/715-4801
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PROGRAM
ArNn4 4 20os

March 31, 2005
Todd S. John
Kimley-Horn and Associates, Inc.
P.O. Box 33068
Raleigh, NC 27636-3068
Project: Jackson Station II
County: Union
?riM?FY
FNVjy?RN
The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NC EEP) is willing to
accept payment for impacts associated with the above referenced project. Please note that this decision does not assure that
the payment will be approved by the permit issuing agencies as mitigation for project impacts. It is the responsibility of the
applicant to contact these agencies to determine if payment to the NC EEP will be approved.
This acceptance is valid for six months from the date of this letter. If we have not received a copy of the issued 404
Permit/401 Certification within this time frame, this acceptance will expire. It is the applicant's responsibility to send
copies of the 404/401 permits to NC EEP. Once NC EEP receives a copy of the 404 Permit and/or the 401 Certification an
invoice will be issued and payment must be made.
Based on the information supplied by you the impacts that will be mitigated are summarized in the following table.
River Basin Wetlands Stream Buffer Buffer
Cataloging (Acres) (Linear Feet) Zone 1 Zone 2
Unit (Sq. Ft.) (Sq. Ft.)
Riparian Non-Riparian Coastal Marsh Cold Cool Warm
Catawba 0.10 0 0 0 0 188 0 0
03050103
Traditional mitigation opportunities in this cataloging unit are scarce and/or not feasible. Based on that fact, EEP reserves
the right to provide mitigation for this project subject to the following conditions:
(a) EEP provides alternative mitigation in the Cataloging Unit (i.e. something other than traditional restoration on a
ratio basis) and/or;
(b) EEP provides compensatory mitigation in an adjacent Cataloging Unit (in this case Catawba 03050101 and/or;
(c) EEP provides preservation in the same Cataloging Unit.
Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation for the permitted impacts
up to a 2:1 ratio. The magnitude of the compensatory mitigation will be as specified in the Section 404 Permit and/or 401
Water Quality Certification.
RP?Stort g... E ... Prot" Oar state..
wxxi;tg
NCDENR
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 919-715-0476 / www.nceep.net
Todd St. John
Kimley-Hom & Associates, Inc.
Jackson Station II
March 31, 2005
Page 2
The mitigation will be performed in accordance with the Memorandum of Understanding between the N. C. Department of
Environment and Natural Resources and the U. S. Army Corps of Engineers dated November 4, 1998.
If you have any questions or need additional information, please contact Carol Shaw at [phone]. -
S' bperely,
W
m D. Gilmore, PE
Director
cc: Cyndi Karoly, Wetlands/401 Unit
Steve Chapin, USACOE-Asheville
Allen Johnson, DWQ Regional Office-Mooresville
File
RUtorz49... E ... prot-mt, Octr State,
®MA
NCDENR
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 919-715-0476 / www.nceep.net
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United States Department of the Interior
FISH AND WILDLIFE SERVICE
Asheville Field Office
160 Zillicoa Street
Asheville, North Carolina 28801
April 8, 2005
Mr. Todd St. John
Kimley-Horn and Associates, Inc.
P.O. Box 33068
Raleigh, North Carolina 27636-3068
Dear Mr. St. John:
Subject: Site Assessment for a 30-acre Mixed-Use Development Located 1 Mile North of
Waxhaw on NC Highway 16 S (Providence Road), Union County, North Carolina
In your letter dated February 24, 2005, you requested our comments on the subject project.
(Please note that your letter was incorrectly sent to our Raleigh Field Office. They
forwarded it to us, and we received it March 7, 2005. In the future you would receive our
responses in a more timely fashion if requests were sent to the appropriate office. To assist
you with this, enclosed is a list of North Carolina's counties showing which ones are
handled by our respective offices in North Carolina.) We have reviewed the information you
presented and are providing the following comments in accordance with the provisions of the
Fish and Wildlife Coordination Act, as amended (16 U.S.C. 661-667e), and section 7 of the
Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543) (Act).
The proposed project (a 30-acre mixed-use development) will be built on land that is currently a
mix of open fields and woodlands (based on the aerial photography provided by the Union
County GIs web site). As you mentioned, the developer is seeking a permit to fill an unnamed
stream and wetland area found within the proposed project site.
Endangered Species. You do not present evidence of any surveys of the project area for
federally listed species known from Union County. Unless an area has been specifically
surveyed for listed species or no appropriate habitat exists, a survey should be conducted to
ensure that these resources are not inadvertently lost. Based on the project location and pictures
obtained from the Union County GIs web site, there appears to be suitable habitat for federally
listed species. The federally endangered Schweinitz's sunflower (Helianthus schweinitzii) and
RED', a 'a {
Arf{ ! D
KIMLEY-HORN
ENVIR.
Georgia aster (Aster georgianus), a candidate' for listing, have both been found near the project
area. Historical data show that Schweinitz's sunflower once existed throughout piedmont,
prairie, and woodland communities. Currently, habitat for this species is restricted to overgrown
fields, roadside edges, and open woodland areas. It is difficult to identify at any time, but even
more so outside the flowering season (late August to October). Georgia aster has been found
within 1 mile of the project site. It is difficult to identify outside the flowering season (early
October to mid-November) and resembles two other asters that occur in the same habitat.
Habitat for this species includes open woodlands and overgrown roadside areas. Accordingly,
we recommend that the botanical surveys be conducted during the period of mid-September
through mid-October. Enclosed is a list of federally endangered and threatened species and
federal species of concern for Union County. In accordance with the Act, it is the responsibility
of the appropriate federal agency or its designated representative to review its activities or
programs and to identify any such activities or programs that may affect endangered or
threatened species or their habitats. If it is determined that the proposed activity may adversely
affect any species federally listed as endangered or threatened, formal consultation with this
office must be initiated. Please note that federal species of concern are not legally protected
under the Act and are not subject to any of its provisions, including section 7, unless they are
formally proposed or listed as endangered or threatened. We are including these species in our
response to give you advance notification and to request your assistance in protecting them.
Erosion Control and Wetland/Stream Protection. Given the proximity of the project to
aquatic environments, we are very concerned with the direct, indirect, and cumulative impacts
that will result from this proposed development. You mention in your letter that the developer
seeks permitting to fill a stream and wetland located in the project area. In general, we oppose
the filling of wetlands and streams for nonwater-dependant activities. In accordance with the
404(b)(1) guidelines, which prohibit wetland filling for nonwater-dependent activities when a
practicable alternative exists, we suggest that an alternatives analysis be conducted, and we
encourage the development of an alternative that avoids impacts to the wetland and stream on the
property. In addition, all wetland/stream crossings should be made perpendicular to the stream,
and spanning structures should be used rather than culverts. Wetland/stream buffers (a minimum
of 100 feet on perennial streams and wetlands and 50 feet on intermittent streams) should be
maintained throughout the project area. Any Clean Water Act 404/401 permit application (from
the U.S. Army Corps of Engineers) should clearly show why impacts are unavoidable and how
impacts that are unavoidable have been minimized. Unavoidable impacts will require mitigation.
We also want to emphasize that stringent measures to control sediment and erosion should be
- implemented prior to any ground disturbance and should be maintained throughout project
. construction. Sediment is considered the primary cause of water pollution in the United States,
and construction is considered the most damaging phase of development to aquatic resources.
. ""Taxa for which the [Fish and Wildlife] Service has on file enough substantial information on biological
• vulnerability and threat(s) to support proposals to list them as endangered or threatened. Proposed rules have not
yet been issued because this action is precluded at present by other listing activity. Development and publication of
• proposed rules on these taxa are anticipated. The Service encourages State and other Federal agencies as well as
other affected parties to give consideration to these taxa in environmental planning" (Federal Register,
February 28, 1996). Taxa formerly considered as "Category 1" are now considered as "candidates."
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- The treatment of storm water leaving the project area and the maintenance of adequate riparian
w buffers are of particular concern. Without proper planning, this development will create more
impervious surfaces (such as roofs, roads, and parking lots), which collect pathogens, metals,
w sediment, and chemical pollutants, and quickly transmit them to receiving waters. According to
w the Environmental Protection Agency, this nonpoint-source pollution is one of the major threats
. to water quality in the United States and is linked to chronic and acute illnesses from exposure
through drinking water and contact recreation.
•
Best management practices can reduce, but not eliminate, pollutant loadings of common
w storm-water pollutants. Designs that collect runoff and allow it to infiltrate the soil have the
• highest documented pollutant-removal efficiency, eliminating nearly all lead, zinc, and solids
and more than 50 percent of total phosphorous. Ponds and wetlands, which allow contaminants
w to settle out of the water column or be broken down by sunlight and biological activity, can
w remove more than 70 percent of bacteria. The North Carolina Wildlife Resources Commission
w has developed a "Guidance Memorandum to Address and Mitigate Secondary and Cumulative
Impacts to Aquatic and Terrestrial Wildlife Resources and Water Quality" that we support and
w encourage you to use. It can be accessed via the Internet as follows:
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http: //www. ncwildlife. orglpgO7_tivildl ifespeciesco7ilpg7c3_impacts.pdf.
Fish and Wildlife Resources. We are concerned with the direct impacts (i.e., the filling of
wetlands and streams, reduction of habitat, etc.) proposed for this project. However, we also
have particular concerns relating to the indirect and cumulative impacts (i.e., storm water,
erosion, sediment discharge, habitat destruction) that would occur as a result of this project. We
offer the following recommendations to help address the impacts associated with this project and
to help minimize impacts to fish and wildlife resources:
The construction of new roadways and urban areas can produce short-term
direct impacts as well as long-term cumulative effects. Studies have shown a
serious decline in the health of receiving waters when 10 to 15 percent of a
watershed is converted to impervious surfaces. Impervious surfaces should be
limited to no more than 7 percent, curb and gutter should be limited in new
developments, and the direct discharge of storm water into streams should be
prevented. We recommend the use of grassed swales in place of curb and
gutter and on-site storm-water management (i.e., bioretention areas) that will
result in no net change in the hydrology of the watershed. These designs often
cost less to install and significantly reduce environmental impacts from
residential development.
2. Loss of riparian buffers and inadequately controlled storm-water runoff from
residential and commercial development areas are major factors resulting in the
degradation and loss of aquatic resources. Forested riparian buffers serve as
filters for contaminants, lessen storm-water velocities, provide thermal cover,
and protect stream bank stability. Riparian buffers also provide travel
corridors and habitat areas for wildlife displaced by development. We suggest
that forested buffers be a minimum of 100 feet wide along perennial streams
and 50 feet wide along intermittent streams and wetlands. We recommend that
all sewer lines, water lines, and utility infrastructure be kept out of riparian
buffer areas. Stream crossings of any utilities should be kept to a minimum,
and multiple utilities should use the same right-of-way whenever possible.
3. The complete clearing of land should be avoided. If clearing is necessary,
efforts should be made to avoid the removal of large trees at the edges of
construction corridors, rights-of-way, and in any surrounding development.
Disturbed areas should be reseeded with seed mixtures that are beneficial to
wildlife. Fescue-based mixtures should be avoided; fescue is invasive and
provides little benefit to wildlife. Native annual small grains appropriate for
the season are preferred and recommended. Where feasible, use woody debris
and logs from clearing activities to establish brush piles and downed logs at the
edges (just in the woods) of all cleared areas to improve habitat for wildlife.
Allowing the area to develop into a brush/scrub habitat would maximize
benefits to wildlife. Project area maintenance should be minimized, and
mowing should be prohibited between April 1 and October 1 in order to reduce
impacts to nesting wildlife. We suggest a maintenance schedule that
incorporates a portion of the area (e.g., one-third) each year instead of the
entire project every 2 or 3 years. Additionally, herbicides should not be used
in wetland areas or near streams.
4. We strongly suggest the use of bridges for all permanent roadway crossings of
streams and associated wetlands to eliminate the need to fill and install
culverts. All stream crossings should be made perpendicular to the stream. If
culverts are the only option, the culvert should be buried at least a foot below
the natural streambed to allow for proper water depth and the movement of
aquatic organisms. Under no circumstances should stream channel widening
for culverts occur nor should riprap be placed in the stream channel.
5. Adequate measures to control sediment and erosion must be implemented prior
to any ground-disturbing activities in order to minimize effects on downstream
aquatic resources. Temporary (e.g., rye grain, wheat, millet) or permanent
herbaceous vegetation should be planted on all bare soil within 5 days of
ground-disturbing activities to provide long-term erosion control.
Biodegradable erosion-control matting should be used in conjunction with
appropriate seeding on disturbed soils in steep slope and riparian areas.
Matting should be secured in place with staples, stakes, or live stakes of native
trees (whenever possible).
6. Equipment should not be operated in the stream unless absolutely necessary.
Equipment should be operated from the banks in a fashion that minimizes
disturbance to woody vegetation. Equipment should be inspected daily and
should be maintained to prevent contamination of surface waters from leaking
4

fuels, lubricants, hydraulic fluids, or other toxic materials. All fuels,
lubricants, and other toxic materials should be stored outside the riparian
management area of the stream, in a location where the material can be
w contained. Equipment should be checked for leaks of hydraulic fluids, cooling
- system liquids, and fuel and should be cleaned before fording any stream.
Also, all fueling operations should be done outside of the riparian management
area.

At this stage of project development and without more specifics about construction locations or
- techniques, it is difficult for us to fully assess potential environmental impacts (direct, indirect,
secondary, and cumulative). We therefore recommend that any environmental document
prepared for this project include the following (if applicable):
- 1. A comparison of alternatives and their associated impacts should be included
- in the environmental document for this project. In particular, we will need a
detailed analysis of stream and wetland impact areas and locations, exact areas
of proposed stream and wetland filling, and locations of stream crossings and
the construction techniques proposed for stream crossings within the
e development project. Plans for all proposed impact areas should include a
complete analysis and comparison of the available construction techniques
and alternatives (including a no-build alternative). The report should contain
information from all surveys and assessments, including the acreage and a
- description of the wetlands that will be filled or impacted and the extent
• (linear feet as well as discharge) of any water courses that will be impacted as
a result of the proposed project. A description of any streams should include
the classification (Rosgen 1995, 1996) and a description of the biotic
resources. All wetland areas affected by the proposed project should be
• mapped in accordance with the Federal Manzral for Identifying and
Delineating Jurisdictional wetlands.
w 2. A description of the fishery and wildlife resources within existing and
• required additional rights-of-way and any areas, such as borrow areas, that
- may be affected directly or indirectly by the proposed project.
3. An assessment of all expected secondary and cumulative environmental
impacts associated with this proposed work. The assessment should specify
w the extent of development proposed for the project area once the roadway
• expansion is complete and how future growth will be maintained and
supported with regard to sewer lines, water lines, parking areas, and other
proposed roadways.

4. A discussion about the extent to which the project will result in the loss,
degradation, or fragmentation of wildlife habitat from direct construction
w impacts and from secondary development impacts. The acreage and location

5

of upland habitat, by cover type, that will be eliminated because of the
proposed project must be noted.
5. Mitigation measures that will be employed to avoid, eliminate, reduce, or
compensate for habitat value losses (wetland, riverine, and upland) associated
with any phase of the proposed project.
We appreciate the opportunity to provide these comments. If we can be of any assistance or if
you have any questions, please do not hesitate to contact Mr. Bryan Tompkins of our staff at
828/258-3939, Ext. 240. In any future correspondence concerning this project, please reference
our Log Number 4-2-05-143.
Sincerely,
l
Brian P. Cole
Field Supervisor
Enclosures
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NORTH CAROLINA COUNTIES
ASHEVILLE FIELD OFFICE I RALEIGH FIELD OFFICE
WORK AREA: WORK AREA:
Alexander Jackson Alamance Lee
Alleghany Lincoln Beaufort Lenoir
Anson Macon Bertie Martin
Ashe Madison Bladen Montgomery
Avery McDowell Brunswick Moore
Buncombe Mecklenburg Camden Nash
Burke Mitchell Carteret New Hanover
Cabarrus Polk Caswell Northampton
Caldwell Rowan Chatham Onslow
Catawba Rutherford Chowan Orange
Cherokee Stanly Columbus Pamlico
Clay Stokes Craven Pasquotank
Cleveland Surry Cumberland Pender
Davidson Swain Currituck Perquimans
Davie Transylvania Dare Person
Forsyth Union Duplin Pitt
Gaston Watauga Durham Randolph
Graham Wilkes Edgecombe Richmond
Haywood Yadkin Franklin Robeson
Henderson Yancey Gates Rockingham
Iredell Granville Sampson
Greene Scotland
Guilford Tyrrell
Halifax Vance
Harnett Wake
Hertford Warren
Hoke Washington
Hyde Wayne
Johnston Wilson
Jones
Contact Information:
Asheville Field Office
U.S. Fish and Wildlife Service
160 Zillicoa Street
Asheville, North Carolina 28801
Phone: [phone]
Fax: [phone]
Contact Information:
Raleigh Field Office
U.S. Fish and Wildlife Service
P.O. Box 33726
Raleigh, North Carolina 27636-3726
Phone: [phone]
Fax: [phone]
ENDANGERED, THREATENED, AND CANDIDATE SPECIES AND FEDERAL
SPECIES OF CONCERN, UNION COUNTY, NORTH CAROLINA
- This list was adapted from the North Carolina Natural Heritage Program's County Species List. It is a
- listing, for Union County, of North Carolina's federally listed and proposed endangered, threatened, and
candidate species and Federal species of concern (for a complete list of rare species in the state, please
contact the North Carolina Natural Heritage Program). The information in this list is compiled from a
- variety of sources, including field surveys, museums and herbaria, literature, and personal
- communications. The North Carolina Natural Heritage Program's database is dynamic, with new records
being added and old records being revised as new information is received. Please note that this list
cannot be considered a definitive record of listed species and Federal species of concern, and it should
- not be considered a substitute for field surveys.
Critical habitat: Critical habitat is noted, with a description, for the counties where it is designated or
proposed.
Aquatic species: Fishes and aquatic invertebrates are noted for counties where they are known to occur.
However, projects may have effects on downstream aquatic systems in adjacent
counties.
COINIAION NAi1IE SCIENTIFIC NAI IE STATUS
UNION COUNTY
Critical Habitat Designation: Carolina heelsplitter (Lasmigona decorata) - The main
stem of Goose Creek (Pee Dee River system), from the N.C. Highway 218 Bridge,
downstream to its confluence with the Rocky River, and the main stem of Duck Creek,
from the Mecklenburg/Union County line, downstream to its confluence with Goose
Creek; the main stem of Waxhaw Creek (Catawba River system), from the N.C. Highway
200 Bridge, downstream to the North Carolina/South Carolina State line; and the main
stem of Flat Creek (Pee Dee River system), Lancaster County, South Carolina, from the
S.C. Route 204 Bridge, downstream to its confluence with the Lynches River, and the
main stem of the Lynches River, Lancaster and Chesterfield Counties, South Carolina,
from the confluence of Belk Branch, Lancaster County, northeast (upstream) of the
U.S. Highway 601 Bridge, downstream to the S.C. Highway 903 Bridge in Kershaw
County, South Carolina.
Within these areas, the primary constituent elements include: (i) Permanent, flowing,
cool, clean water; (ii) Geomorphically stable stream and river channels and banks;
(iii) Pool, riffle, and run sequences within the channel; (iv) Stable substrates with no
more than low amounts of fine sediment; (v) Moderate stream gradient; (vi) Periodic
natural flooding; and (vii) Fish hosts, with adequate living, foraging, and spawning areas
for them.
Vertebrates
Carolina darter Etheostoma Collis Collis FSC
Invertebrates .
Atlantic pigtoe Fusconaia masoni FSC
Carolina heelsplitter Lasmigona decorata Endangered
November 12, 2003 Page 1 of 2
COMMON NAME SCIENTIFIC NAME STATUS
Savanna lilliput Toxolasina pullus FSC
Carolina creekshell Villosa vaughaniana FSC
Yellow lampmussel Lampsillis cariosa FSC
Vascular Plants
Georgia aster Aster georgianus C l
Michaux's sumac Rhus michauxii Endangered
Prairie birds foot-trefoil Lotus unifoliolatus var. helleri FSC
Schweinitz's sunfl ower Helianthus schtiveinitzii Endangered
Virginia quillwort Isoetes virginica FSC
Heller's trefoil Lotus helleri FSC
KEY:
Status Definition
Endangered A taxon "in danger of extinction throughout all or a significant portion of its range."
Threatened A taxon "likely to become endangered within the foreseeable future thro ughout all or a
significant portion of its range."
Cl A taxon under consideration for official listing for which there is suffici ent information to
support listing.
FSC A Federal species of concern--a species that may or may not be listed in the future (formerly
C2 candidate species or species under consideration for listing for which there is insufficient
information to support listing).
November 12, 2003 Page 2 of 2
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9 North Carolina Wildlife Resources Commission 0
Richard B. Hamilton, Executive Director
17 March 2005
• Mr. Todd St. John
• Kimley-Horn and Associates, Inc.
- P.O. Box 33068
Raleigh, NC 27636-3068
•
- Subject: Information Request for Jackson Station II, NC Highway 16 S. (Providence
Road), Waxhaw, Union County, North Carolina. NCWRC Project No.
• P.05.03.04.01
Dear Mr. St John:
•
Biologists with the North Carolina Wildlife Resources Commission (NCWRC) have
• reviewed the subject document. A. Perin Development Company, LLC is proposing to seek
permitting to fill a stream and wetlands for mixed use development of an approximately 30-acre
• site. The site is surrounded by commercial and residential development and woodlands.
•
- The site drains to Blythe Creek, a tributary to East Fork Twelvemile Creek, in the
Catawba River basin. There are records for the federal species of concern and state endangered
• Carolina creekshell (Villosa vaughaniana) in Blythe Creek. Additionally, there are records for
the federal species of concern and state special concern Carolina darter (Etheostoma collis) and
• the state special concern notched rainbow (Villosa constricta) in East Fork Twelvemile Creek.
• The project site is not located within NCWRC game lands. While it does not appear that
• the proposed project will impact federal listed threatened or endangered species, we recommend
- that you consult with the U.S. Fish and Wildlife Service (USFWS) at [phone] to ensure
that any issues related to federally listed species are addressed. We are concerned that the
• project has the potential to impact the Carolina creekshell. Information on measures to minimize
• impacts from development can be found in NCWRC's Guidance Memorandum to Address and
• Mitigate Secondary and Cumulative Impacts to Aquatic and Terrestrial Wildlife Resources and
r.
LJ
r
• Mailing Address: Division of Inland Fisheries - 1721 Mail Service Center - Raleigh, NC 27699-1721
Telephone: [phone] - Fax: [phone]
•
•
0 z'd TTst-silt-9EE 4uerJg '1's eTE:80 s0 LI Jew
Page 2
17 'March 2005
Jackson Station II
NCWRC Project No. P.05.03.04.01
Water Quality. This document can be found at
http://www.ncwildlife.orv-/pp
07 WildlifeSpeciesCon/Vg7c3 impacts.pdf.
Thank you for the opportunity to provide input on this project. If you need additional
information, please contact our office at [phone]_
Sincerely,
Shari L. Bryant
Eastern Piedmont Region Coordinator
Habitat Conservation Program
cc (e-mail): John Fridell, USFWS
Ryan Heise, WRC
Sarah McRae, NFIP
E ' d I I Sb-6tbty-9EE queRJH ' 1 ' S eaE : 80 SO L l Jew
C? S - 0(9 45
US Army Corps PUBLIC NOTICE
Of Engineers
Wilmington District
Issue Date: 08 June 2005
Comment Deadline: 07 July 2005
Corps Action ID #: 200531913
All interested parties are herby advised that the Wilmington District, Corps of Engineers (Corps)
has received an application for work within jurisdictional waters of the United States. Specific
plans and location information are described below and shown on the attached plans. This
Public Notice and all attached plans are also available on the Wilmington District Web Site at
www.saw.usace.amiy.mil/wetlands
Applicant: A. Perin Development Company, LLC
12 Valley Place
Chester, NJ 07930
AGENT (if applicable):
Kimley-Horn & Associates, Inc.
Attn: Todd St. John
P.O. Box 33068
Raleigh, NC 27636-3068
Q[9 rr.-, r9 0 d19 ?
JUN 1 0 2005
DENR - WATER QUALITY
ViEETLANDS AND STOR)AVATER BRANCH
Authority
The Corps will evaluate this application and a decide whether to issue, conditionally issue, or
deny the proposed work pursuant to Section 404 of the Clean Water Act.
Location
The existing commercial development known as Jackson Station II is located on the east side of
NC Hwy 16, in Waxhaw, Union County, North Carolina (34.9326848°N -80.7462858°W) and is
approximately 60 acres in size. The proposed impacts are located immediately adjacent to an
existing retaining wall at the CVS Pharmacy retail store. The site is immediately adjacent to NC
Hwy 16 and is the western most building pad in the mixed-use development known as Jackson
Station II. The site contains wetlands and unnamed tributaries to Blythe Creek. Blythe Creek
flows into the Catawba River, which ultimately flows into the Atlantic Ocean through the
Santee-Cooper River in South Carolina.
Existing Site Conditions
Jackson Station II is located in the Carolina Slate Belt Ecoregion. The site is located at the top of
a watershed that flows into unnamed tributaries to Blythe Creek. The area consists of gently
rolling hills. A majority of the property has already been graded and contains roads, stormwater
detention facilities, and building pads. Figure 3 depicts a site plan showing the entire property
with existing infrastructure. The NRCS Soil Survey of Union County, North Carolina maps the
following soils as existing at the site before grading had taken place: Udorthents (Ud), Tatum
gravelly, silty, clay, loam (TbB2, TbC2), and Badin Channery silty, clay, loam (BdC2). None of
the soils mapped by the NRCS Soil Survey are considered hydric in North Carolina by the
NRCS.
The entire property contains unnamed tributaries to Blythe Creek in the Catawba River Basin
(HUC 03050103). The proposed impact site has approximately 188 feet of unnamed tributary to
Blythe Creek and approximately 0.10 acres of associated wetlands. The stream was most likely a
Rosgen classification Bc type channel with a bankfull width of 2 to 3 feet. However, these areas
have been heavily impacted by urbanization and are cut off from the downstream riparian areas
due to existing downstream road crossings. The wetlands on the site consist of the following
species: yellow poplar (Liriodenderon tulipifera), red maple (Ater rubrum), tag alder (Alnus
serrulata), microstegium (Microstegium vimineum), knotweed (Polygonum spp.), cattail (Typha
latifolia), and soft rush (Juncus effuses). Typically this plant community would be a Mesic
Hardwood community, however due to the disturbed, fragmented nature of the Jackson Station II
site, it no longer can be classified as such. The wetlands and stream channels at the impact site
are considered poor to fair quality.
Previous impacts to jurisdictional areas have occurred on the site under Nationwide Permit #39
authorization dated November 1, 2002. Impacts to stream channels associated with this
authorization were 250 feet of important stream channel and 700 feet of unimportant stream
channel. These impacts were associated with the construction of a road crossing and stormwater
detention facility. Nationwide Permit 912 dated June 20, 2004 authorized temporary impacts to
approximately 80 linear feet of stream channel associated with the construction of a sewer line.
Applicant's Stated Purpose
As stated by the applicant, the purpose and need for the project is to remove the safety and
liability issues created by the existing retaining wall. Since its construction, the wall has been a
source of concern for Town of Waxhaw officials including the Town Manager and Chief of
Police. The applicant proposes to remove a portion of the retaining wall by constructing a safer,
earthen slope.
2
Project Description
The applicant is proposing to impact approximately L&S-linear- feet- of_streaiu_channrJ and 0.10
acre of wetlands by placing fill material adjacent to the retaining wall. The original purpose for
constructing the retaining wall was an attempt to remain below notification thresholds for a 401
Water Quality Certification and the subsequent requirement for stormwater BMPs. However,
impacts associated with the development of the site eventually necessitated a written 401 Water
Quality Certification from NCDWQ.
The retaining wall is constructed of gabion baskets and is approximately 34 feet tall. The
applicant will backfill a majority of this wall with earthen fill. The applicant has secured a slope
easement from Henn Automotive, Inc. to construct 2:1 side slopes sufficient to bury the wall so
that only a small section of wall would remain. The applicant proposes compensatory mitigation
through the purchase of 188 feet of stream mitigation credits and 0.1 acres of wetland mitigation
credits from the North Carolina Ecosystem Enhancement Program. See attached Figures 4 and 5
for a detailed site plan.
Other Required Authorizations
This notice and all applicable application materials are being forwarded to the appropriate State
agencies for review. The Corps will generally not make a final permit decision until the North
Carolina Division of Water Quality (NCDWQ) issues, denies, or waives State certification
required by Section 401 of the Clean Water Act (PL 92-500). The receipt of the application and
this public notice in the NCDWQ Central Office in Raleigh serves as application to the NCDWQ
for certification. A waiver will be deemed to occur if the NCDWQ fails to act on this request for
certification within sixty days of the date of the receipt of this notice in the NCDWQ Central
Office. Additional information regarding the Clean Water Act certification may be reviewed at
the NCDWQ Central Office, 401 Oversight and Express Permits Unit, 2321 Crabtree Boulevard,
Raleigh, North Carolina 27604-2260. All persons desiring to make comments regarding the
application for certification under Section 401 of the Clean Water Act should do so in writing
delivered to the North Carolina Division of Water Quality (NCDWQ), 1650 Mail Service Center,
Raleigh, North Carolina 27699-1650 Attention: Ms. Cyndi Karoly by 07 July 2005
Cultural Resources
The Corps has consulted the latest published version of the National Register of Historic Places
and is not aware that any registered properties, or properties listed as being eligible for inclusion
therein are located within the project area or will be affected by the proposed work. Presently,
unknown archeological, scientific, prehistoric, or historical data may be located within the
project area and/or could be affected by the proposed work.
3
Endangered Species
The Corps has reviewed the project area, examined all information provided by the applicant and
consulted the latest North Carolina Natural Heritage Database. Based on available information,
the Corps has determined pursuant to the Endangered Species Act of 1973, that the proposed
project will have no effect on federally listed endangered or threatened species or their formally
designated critical habitat.
Evaluation
The decision whether to issue a permit will be based on an evaluation of the probable impacts,
including cumulative impacts, of the proposed activity on the public interest. That decision will
reflect the national concern for both protection and utilization of important resources. The
benefit which reasonably may be expected to accrue from the proposal must be balanced against
its reasonably foreseeable detriments. All factors which may be relevant to the proposal will be
considered including the cumulative effects thereof; among those are conservation, economics,
aesthetics, general environmental concerns, wetlands, historic properties, fish and wildlife
values, flood hazards, flood plain values (in accordance with Executive Order 11988), land use,
navigation, shoreline erosion and accretion, recreation, water supply and conservation, water
quality, energy needs, safety, food and fiber production, mineral needs, considerations of
property ownership, and, in general, the needs and welfare of the people. For activities involving
the discharge of dredged or fill materials in waters of the United States, the evaluation of the
impact of the activity on the public interest will include application of the Environmental
Protection Agency's 404(b)(1) guidelines.
Commenting Information
The Corps is soliciting comments from the public; Federal, State and local agencies and officials;
Indian Tribes and other interested parties in order to consider and evaluate the impacts of this
proposed activity. Any comments received will be considered by the Corps to determine
whether to issue, modify, condition or deny a permit for this proposal. To make this decision,
comments are used to assess impacts on endangered species, historic properties, water quality,
general environmental effects and the other public interest factors listed above. Comments are
used in the preparation of an Environmental Assessment (EA) and/or an Environmental Impact
Statement (EIS) pursuant to the National Environmental Policy Act (NEPA). Comments are also
used to determine the need for a public hearing and to determine the overall public interest of the
proposed activity.
Any person may request, in writing, within the comment period specified in this notice, that a
public hearing be held to consider the application. Requests for public hearings shall state, with
particularity, the reasons for holding a public hearing. Requests for a public hearing shall be
granted, unless the District Engineer determines that the issues raised are insubstantial or there is
otherwise no valid interest to be served by a hearing.
4
Written comments pertinent to the proposed work, as outlined above, will be received by the
Corps of Engineers, Wilmington District, until 5pm, 07 July 2005. Comments should be
submitted to Ms. Amanda Jones, 151 Patton Avenue, Room 208, Asheville, NC 28801.
5
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TAX PARCEL # 06141018A Wall
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PATMAR DEVELOPMENT, LLC
12 VALLEY PLACE
CHESTER, NJ 07930
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401 approval
Subject: 401 approval
From: Alan Johnson <[e-mail]>
Date: Tue, 05 Jul 2005 09:40:29 -0400
To: Ian McMillan <[e-mail]>, Cyndi Karoly <Cyndi.Karol [e-mail]>
05-0945, Jackson Station II, Union County, Individual Permit.
No problem from this end. Approve. They built a retaining wall initially, when
they should have just piped the stream. Now the wall is a problem (safety
concern). Headwater of stream. Will put on BIMS when I find out how. Just
wanted to let you know.
Alan Johnson - Alan.Johnson@ncmai1 net
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
610 E. Center Ave., Suite 301
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
1 of 1 7/5/2005 9:41 AM
Triage Check Dist
Date:
6/9/05
Project Name: Jackson Station II
To:
Alan Johnson, Mooresville Regional Office
DWQ#: 05-0945
County: Union
60-day Processing Time: 5/31/05 to 7/29/05
From: Cyndi Karoly Telephone : [phone]
The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.
? Stream length impacted
? Stream determination
Wetland determination and distance to blue-line surface waters on USFW topo maps
? Minimization/avoidance issues
? Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings?
? Cumulative impact concern
Comments: As per our discussion regarding revision of the triage and delegation processes,
please review the attached file. Note that you are the first reviewer, so this file will need to be
reviewed for administrative as well as technical details. If you elect to place this project on hold,
please ask the applicant to provide your requested information to both the Central Office in
Raleigh as well as the Asheville Regional Office. As we discussed, this is an experimental, interim
procedure as we slowly transition to electronic applications. Please apprise me of any
complications you encounter, whether related to workload, processing times, or lack of a "second
reviewer" as the triage process in Central had previously provided. Also, if you think of ways to
improve this process, especially so that we can plan for the electronic applications, let me know.
Thanks!
®?? Kimley-Horn
and Associates, Inc,
P.O. Box 33068
Raleigh, North Carolina
27636-3068
TEL [phone]
FAX [phone]
Transmittal
Date: May 27, 2005 Job Number:
Project Name: Jackson Station II Individual Permit/Certification Applicatior
To: Cyndi Karoly
North Carolina Division of Water Quality
401 Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
We are sending these by
? U.S. Mail
? Other
® FedEx
? Hand Delivery
We are sending you
? Attached
? Shop drawings
? Other
? Under separate cover via the following items:
? Prints/Plans ? Samples ? Specifications ? Change Orders
Copies Date No. Description
2 each 5/27/05 Individual WQC Application
1 5/27/05 Check for $475.00 from Applicant
These are transmitted as checked below:
? For your use ? Approved as submitted ? Resubmit ? Copies for approval
? As requested ? Approved as noted ? Submit ? Copies for distribution
? For review and comment ? Returned for corrcctions ? Return ? Corrected prints
Remarks:
012538002
Copy to: Signed: Todd St. John, P.E.
KimleyHorn
and Associates, Inc.
May 23, 2005
Amanda Jones
ASHEVILLE REGULATORY FIELD OFFICE
US Army Corps of Engineers
151 Patton Avenue, Room 208
Asheville, North Carolina 28801-5006
Cyndi Karoly
North Carolina Division of Water Quality
401 Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Re: Individual Permit Application for Jackson Station to Remove Retaining Wall
Dear Ms. Jones and Ms. Karoly:
Please find the attached application for an Individual 404 Permit and 401
Certification to backfill a retaining wall at the Jackson Station 11 mixed use
development project. This application has been prepared based on the onsite pre-
application with Ms. Jones and Alan Johnson of the Division of Water Quality's
Mooresville Regional Office that occurred on December 6, 2004.
If you have any questions or need any additional documentation please contact
me at [phone]. `
Very truly yours,
KIMLEY-HORN AND ASSOCIATES, INC.
Todd St. John
Project Manager
?o
o?
r?
R.O. Box 33068
Ra!eigh, North Carolina
27636-3068
TEL [phone]CO
FAX [phone]
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• Kimley-Horn
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•
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A_T?_ G 5-09q 's

North Carolina Wildlife Resources Commission D
Richard B. Hamilton, Executive Director
MEMORANDUM
TO: Ms. Amanda Jones, Asheville Regulatory Field Office U?
U.S. Army Corps of Engineers
FROM: Shari L. Bryant, Pont Region Coordinator
JUN 2 q
Habitat Conservation Program 20G5
DATE: 27 June 2005 ?t£;LC f`- ?
?hc G?t?;Cy
SUBJECT: Public Notice for A. Perin Development Company, LLC for Jackson Station Il, Union
County, North Carolina. Action ID No. 200531913
Biologists with the North Carolina Wildlife Resources Commission (NC WRC) have reviewed the
subject document and we are familiar with the habitat values of the area. Our comments are provided in
accordance with provisions of the Clean Water Act of 1977 (as amended), Fish and Wildlife Coordination
Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d), and North Carolina General Statutes (G.S. 113-131
et seq.).
The applicant proposes to place fill material in approximately 188 linear feet of stream channel
and 0.10 acre of wetlands to construct 2:1 side slopes sufficient to bury a 34-foot retaining wall. The
purpose of the project is to remove safety and liability issues crated by the retaining wall which is
associated with a commercial development. Unnamed tributaries to Blythe Creek flow through the site.
Impacts from previous construction total 250 feet of important stream channel and 700 feet of
unimportant stream channel. The mitigation plan includes payment into the North Carolina Ecosystem
Enhancement Program (NCEEP) for 188 linear feet of stream mitigation credits and 0.1 acres of wetland
mitigation credits.
Blythe Creek is a tributary to West Fork Twelvemile Creek in the Catawba River basin. There
are records for the federal species of concern and state endangered Carolina creckshell (villosa
vaughanlana) in Blythe Creek. In West Fork Twelvcmile Creek, there are records for the state special
concern notched rainbow (Villosa constricta).
Stream piping and placing fill in aquatic resources can result in significant negative impacts to
downstream areas and eliminate fish and wildlife habitat. Stream piping reduces the infiltration of
stormwater and associated pollutants, as well as the dissipation of stream energy. Piping a stream and
placing it underground removes both aquatic and terrestrial habitat. Likewise we hesitate to concur with
the filling of wetlands due to their wildlife habitat value and the well-known beneficial functions that they
provide for flood control and water quality protection.
Mailing; Address: Division of Inland Fisheries - 1721 Mail Service Center - Raleigh, NC 27699-1721
Telephone: [phone] - Fax: [phone]
Page 2
27 June 2005
Jackson Station Il
Action ID No. 200531913
We feel that compensatory mitigation should include payment into NCEEP for 2:1 wetland
restoration unless other mitigation measures (e.g., preservation of remaining wetlands within the
development) are proposed to be equivalent to 2:1. Additionally, mitigation for stream impacts should be
consistent with the compensatory mitigation ratios outlined in The Stream Mitigation Guidelines (April
2003). It is unclear whether mitigation has been proposed or performed for previous stream and wetland
impacts. We feel that mitigation for previous impacts should be included if mitigation for previous
impacts has not been performed.
We will not object to the project provided the following conditions are incorporated into the
permit to reduce impacts to fish and wildlife resources.
1. To minimize additional stream impacts, while retaining some measure of wildlife habitat, we
recommend that a 100-foot undisturbed, native, forested buffer along perennial streams, and a 50-
foot buffer along intermittent streams and wetlands. Maintaining undisturbed, forested buffers
along these areas will minimize impacts to fish and wildlife resources, water quality, and aquatic
habitat both within and downstream of the project area. In addition, wide riparian buffers are
helpful in maintaining stability of stream banks and for treatment of pollutants associated with
stormwater runoff. Whereas, a grassed buffer, particularly fescue, is a vegetated buffer but will
not provide the necessary and highly valuable functions as discussed for forested buffers.
2. We recommend that all remaining wetlands and streams on the site should be protected from
additional impacts by placing them in a permanent conservation easement to prohibit filling,
draining, flooding, and excavation.
3. Specialized efforts and techniques are implemented to reduce sediment runoff from construction
activities. Excessive silt and sediment loads can have numerous detrimental effects on aquatic
resources including destruction of spawning habitat, suffocation of eggs, and clogging of gills of
aquatic species.
4. A mitigation plan should be submitted and approved before impacts occur.
Thank you for the opportunity to comment on this project. If we can provide further assistance,
please contact our office at [phone].
cc: Cyndi Karoly, DWQ
cc (e-mail): Sarah McRae, NHP
Ryan Heise, WRC
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10' VAR1E VARIES 12' VARIES VARIES VARIES 4' VARIES
RICH MARSH MID MARSH LOW MARSH CONCRETE SLAB rov 18" - 36" 9" - 18" 0" - 9"
W/MANHOLE ACCESS COVER
TOP OF EMBANKMENT "A" PERMANENT WA R LOW MARSH
EMERGENCY SPILLWAY "B" QUALITY POOL PLANTINGS
' .5" I EACH SIDE -"C" MyypTER
R1P-RAP APRON Q ' ~ C~ 2x X81 ) S10R Er z INL O
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DISHCARGE PIPE 1 PROVIDE RIP-RAP
P T A!N APRON FROM DISCHARGE PIPE TO FOREBAY BOTTOM
(10'WIDf, 18'DEPTH) ' AQUATIC VEGETATION TO BE PLANTED IN ALL MARSH ZONES
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~ ~ ~ Iyf 622.00' 618.00' 612.70' 1-6" 608.00' 3" 607.00' 3' ~ S
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NOTES U • ~ v NOTES• ~
~A ~ ~
1, AOUAT 1, AOUATiC VEGETATION LIST FOR NORMAL POOL DEPTHS (REFER ALSO TO TABLES 4.1, 4,2 h 4.3 OF THE STORMWATER BEST MANAGEMENT PRACTICES DESIGN MANUAL): V~ ~ ~
UP TO UP TO 3": MARSH HIBISCUS UP TO 6".• COMMON THREE SQUARE UP TO 12N• ARROW ARUM 12° & MORE. COONTAIL ~ U ~ vi
RICE CUTGRASS ARROWHEAD/DUCK POTATO DUCKWEED cd SEDGES BUSHY BEARDGRASS POND WEED a
SPATTERDOCK wit- WATERWEED ~ ~
SWITCH GRASS LIZARDS TAIL WILD CELERY •.-r • SWEET FLAG PICKERELWEED ~ d
SOFT-STEM BULRUSH ~ ~
SMARTWEED SOFT RUSH ~
~ $ • WILD R1Cf y
Q~ ~
2, A VAR TO PLA 2 A VARIETY OF PLANTS SHALL Bf USED IN EACH OF THE MARSH PLANTING ZONES TO PROVIDE A DENSE COVERAGE FOR MORE INfORMATTON RELAANG Q TO PLANTING OF THE SPECIFIED SPECIES, CONSULT WITH AN ENVlRONOMENTAL ENGINEER OR WETLANDS CONSULTANT M"7 a
' w a
3, EMBAh 3, EMBANKMENT BETWEEN FOREBAY AND POND SHALL HAVE AQUATC VEGETATION FROM ABOVE AQUATIC VEGETATION LIST ~
4, 1NSPEC 4, INSPECTION SCHEDULE. AS SPECIFIED BELOW AND AS STATED IN THE WET (WETLANDS) BASIN OPERATION AND MAINTENANCE AGREEMENT,
OPERA OPERATTON AND MAINTENANCE AGREEMENT SHALL BE INCORPORATED AS A CONDITION OF THIS WRITTEN STORMWATER MANAGEMENT PLAN, ~
1NSPECnOP 1NSPfCITON ACITTVITIES;
: ~
A) TESl!!v A) TESTING OF THE EMERGENCY DRAIN PIPE VALVES (IF APPLICABLE). ~
B) V1SUA1 C) V1SUA1 B) VISUAL INSPECTION OF ORAWDOWN ORIFICE, VA V1SUA INSPECTION OF THE EMERGENCY SPILLWAY, \ - - . C) L
D) V1SUA1 D) VISUAL INSPECTION OF THE POND RIM AND SLOPES. ~
E) MEASIr ORIFIC! E) MEASUREMENT OF THE WET POND DEPTH AT 7HE DAM END OF THE DETENTION POND (DISTANCE FROM PERMANENT POND DRAWDOWN ORIFICE INVERT TO BOTTOM OF THE POND).
F) VlSUA! F VISUAL INSPECTION OF ALL STORMWATER STRUCTURES ON THE SERVED SITE FEEDING THE DETENTION POND. ~;A~ )
G) V1SUA1 H) V1SUA1 G) VISUAL INSPECTION OF THE TOTAL SITE DRAINAGE BASIN FOR ADEOUA IE GROUND COVER LEADING TO THE STABILIZED SI TE ~ H) VISUAL INSPECTION OF UPSTREAM (OFF-S117=) AREAS FEEDING INTO TN£ SITE DRAINAGE BASIN FOR POTENITAL OFF-SITE SEDIMENTA]TON
SOUR( SOURCES. '
MAINTENAR MAINTENANCE ACITVII7ES'
A) IF THE A) IF THE PERMANENT POND DEPTH IS MEASURED TO BE LESS THAN 3/4 OF THE DESIGNED PERMANENT POOL DEPTH, THE PONp SHALL BE
DRAIN! IF THE DRAINED AND CLEARED OF SEDIMENT TO THE DESIGNED FULL DEPTH AND DISPOSED OF OFf-SITE & RESEEDED AS REQUIRED TO PREVENT EROSION, IF THE FOREBAY IS MEASURED TO BE LESS THAN 3/4 THE DESIGNED DEPTH, THE SEDIMENT SHALL BE CLEANED OUT TO THE REQUIRED
HEIGHT HEIGHT AND DISPOSED OF OFF-SITE. RIP-RAP IN FOREBAY FROM DISCCARGE PIPE MAY NEED TO BE REMOVED AND REPLACED DURING
CLEAN FOREB CLEANOUI; WHICH WILL REMOVE SEDIMENT FROM RIP-RAP APRON. SEDIMENT REMOVAL MUST BE PERFORMED AFTER EACH STORM EVENT FOREBAY N1LL REQUIRE SEDIMENT REMOVAL MORE FREQUENT THAN POND,
B) RISER B) RISER MECHANISM SHALL BE REPAIRED AND CLEANED AS NECESSARY TO BRING THE MECHANISM UP TO FULLY FUNCTIONAL CONDITION
AS OR AS ORIGINALLY DESIGNED AND SPECIFIED,
C) UN1FOf D) UNIFOF T 1 1 E ANY IS R DAR AS OMPR MlSING THE Dfi'ENiT N P ND RIM. C) UNIFORMLY GRADE AND S AB L Z D ]U BE E C O O 0 z D) UNIFORMLY GRADE AND STABILIZE ANY DISTURBED AREAS ON THE REMAINDER OF THE SITE.
E) CLEAN E) CLEANOUT STAKES SHALL 8E PROVIDE IN THE POND AND FOREBAY INDICATING ONE-QUARTER AND FULL DEPTH. _,J U / n J t/ 1
F) PONO C) IN THE F) POND SHALL BE INSPECTED AFTER EACH SIGNIFICANT STORM EVENT AND AT LEAST MONTHLY I J G) IN THE EVENT POND MUST BE DRAINED FOR MAINTENANCE, A MUD PUMP SHALL BE USED TO DRAIN THE PERMANENT POOL AND SEDIMENT } _
FOREB FOREBAYS. DRAW DOWN SHALL BE CONTROLLED IN SUCH MANNER THAT FLUSHING OF SEDIMENT 1S LIMITED AS ML,,H AS PRACTICAL AND ~ Z
DISCH~ Q DISCHARGE FROM PUMP SHALL 8E FILTERED WITH THE USE OF A GRAVEL & RIP-RAP CHECK DAM OR OTHER APPROVED F1L17=RING DEVICE, a a I-
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A ~ lA t A Al ~ A ~V (.,a ~ I ~ l l 'f~ r ( i i ~ ' ~ / , / ~ I 1 ~ 1 1 ~ f ~ I j / / t ! / , ~ r / , LOYVER ORIFICE 607, ~ I I r i 1 / r i~ l i I I ! I i / r / .607.00 ~ 11 ~ r r l 1~.~ r l / I~ 1 i t I I I I ' I~ r
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HICK MARSH MID MARSH LOW MARSH CONCRETE SLAB TOP 18" - 36" 9" - 18" 0" - 9"
W/A/ANHOLE ACCESS
COVER
70P OF EMBANKMENT "A" PERMANENT WA ER LOW MARSH
EMERGENCY SPILLWAY "BN QUALITY POOL PLANTINGS
N " WE! EACH Wq'(ER
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COLLARS COLLARS ~ ~ ~ ~ .
~ ':7~
DlSHCARGf P1PE 1~ PROVIDE RIP-RAP
Al ~t APRON FROM DISCHARGE PIPE TO fOREBAY BOTTOM
(10'W/DE, 18'DEPTH)
" AQUATIC VEGETATION TO 8E PLANTED IN ALL MARSH ZONES a
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POND ELE~ ELfK ELE~ SIZE INV. SIZE INV, DEPTH ~ "C3
ryf 622.00' 618.00' 612.70' 1-6" 608.00' 3" 607.00' 3' ~ ~ ~
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NOTES; U NOTES; p
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t. AWArIC v! ~ a~ ~ 1. AQUATIC VEGETATION LIST FOR NORMAL POOL DEPTHS (REFER ALSO TO TABLES 4.1, 4.2 & 4.3 OF THE STORMWATER BEST MANAGEMENT PRACTICES DESIGN MANUAL): V~ ~
UP TO 3".~ UP TO 3".' MARSH HIBISCUS UP TO 6':• COMMON THREE SQUARE UP TO 12".~ ARROW ARUM 12" & MORE.• CODNTAlL ~ ~ ~
RICE CUTGRASS ARROWHEAD DUCK POTATO D KW ~ ~ ~ / UC EED ~ SEDGES BUSHY BEARDGRASS POND WEED ~ ~
a ~ SPATTERDOCK ~fi4l~ WATERWEED ~ ~
SWITCH GRASS LIZARDS TAIL N?LD CELERY ~ ~
SWEET FLAG PICKERELWEEO ~ o SOFT-STEM BULRUSH ~ ~
SMARTWEED ~ r
SOFT RUSH ~ ' WILD RICE ~
~ ~ ~ Q
2 A VARIETY 2, A VARIETY OF PLANTS SHALL BE USED !N EACH OF THE MARSH PLANTWG ZONES TO PROVIDE A DENSE COVERAGE. fOR MORE INFORMA170N RELAI)NC ~
TO PLANAN TO PLANANG OF THE SPECIFIED SPECIES, CONSULT WITH AN ENVIRONOMENlAL ENGINEER OR WETLANDS CONSULTANT H"~ ~ a
3. EMBANKME! ' w a 3. EMBANKMENT BETWEEN FOREBAY AND POND SHALL HAVE AQUATIC VEGETATION FROM ABOVE AQUATIC VEGETATION LIST o
4. INSPECTION 4. INSPECTION SCHEDULE; AS SPECIFIED BELOW AND AS STATED IN THE WET (WERANOS) BASIN OPERATION AND MAINTENANCE AGREEMENT;
OPERA IJON OPERATION AND MAINTENANCE AGREEMENT SHALL 8E INCORPORATED AS A CONDITION OF THIS WRITTEN STORMWATER MANAGEMENT PLAN.
INSPECTION AC+ INSPECTION ACIITVI flES;
A) TESTING 01 A) TESTING OF THE EMERGENCY GRAIN PIPE VALVES (1F APPLICABLE),
B) VISUAL INS C) VISUAL INS T WN RFl ; B) VISUAL INSPEC ION OF ORAWDO 0 I CE. C) VISUAL INSPECTION OF THE EMERGENCY SPILLWAY, V~, '
D) VISUAL !NS D) VISUAL INSPECTION Of THE POND RIM AND SLOPES.
E) MEASUREM+ E MEASUREMENT OF THE WET POND DEPTH AT )HE DAM END OF THE DETENTION POND (DISTANCE FROM PERMANENT POND DRAWDOWN ~ )
ORIFICE IN6 F) VISUAL INS ORIFICE INVERT TO BOTTOM OF THE POND), ~ 'a: F VISUAL INSPECTION OF ALL STORMWATER STRUCTURES ON THE SERVED SITE FEEDING THE DETENTION POND. )
G) VISUAL INS G) VISUAL INSPECTION OF THE TOTAL SITE DRAINAGE BASIN FOR ADEQUATE GROUND COVER LEADING TO THE STABILIZED SITE,
H) VISUAL INS SOURCES. H) VISUAL INSPECTION OF UPSTREAM (OFF-SIZE) AREAS FEEDING INTO THE SITE DRAINAGE BASIN FOR POTENTIAL OFF-SITE SEDIMENTATION SOURCES.
i .
MAINTENANCE ~ MAINTENANCE ACTIVITIES;
A) IF THE PEh A) IF THE PERMANENT POND DEPGN 1S MEASURED TO 8E LESS THAN 3/4 OF THE DESIGNED PERMANENT POOL DEPTH, THE PONp SHALL BE
DRAINED A DRAINED AND CLEARED OF SEDIMENT TO THE DESIGNED FULL DEPTH AND DISPOSED OF OfF-SITE & RESEEDED AS REQUIRED TO PREVENT EROSION,
1F THE FOh HEIGHT Al 1F THE FOREBAY IS MEASURED TO BE LESS THAN 3/4 THE DESIGNED DEPTH, THE SEDIMENT SHALL Bf CLEANED OUT TO THE REQUIRED HEIGHT AND DISPOSED OF OFF-SITE RIP-RAP IN FOREBAY FROM OISHCARGE PIPE MAY NEED TO BE REMOVED AND REPLACED DURING
CLEANOUT CLEANOUl; WHICH WILL REMOVE SEDIMENT FROM RIP-RAP APRON. SEDIMENT REMOVAL MUST 8E PERFORMED AFTER EACH STORM EVENT
FOREBAY V 8) RISER MECi FOREBAY WILL REQUIRE SEDIMENT REMOVAL MORE FREQUENT THAN POND. 8) RISER MECHANISM SHALL BE REPAIRED AND CLEANED AS NECESSARY TO BRING THE MECHANISM UP TO FULLY FUNCTIONAL CONDITION
AS OR1G1N~ AS ORIGINALLY DESIGNED AND SPECIFIED,
C) UNIFORMLY D) UNIFORML Y C UNIFORMLY GRADE AND STABILIZE ANY DISTURBED AREAS COMPROMISING THE DETENTION POND RIM. ) z D) UNIFORMLY GRADE AND STABILIZE ANY DISTURBED AREAS ON THE REMAINDER OF 1HE SITE.
E) CLEANOUT E) CLEANOUT STAKES SHALL BE PROVIDE IN 1HE POND AND FOREBAY INDlCATINC ONE-QUARTER AND FULL DEPTH. _J U
F) POND SHAT F A !N P T AFT R EACH SIGNIFICANT STORM VENT AND AT LEAST MONTHLY, POND SH LL BE SEC ED E E F ~
G) 1N THE EVE FOREBAYS. G) IN THE EVENT PONp MUST BE DRAINED OR MAINTENANCE, A MUD PUMP SHALL BE USED TO DRAIN THE PERMANENT POOL AND SEDIMENT _ FOREBAYS. DRAW DOWN SHALL BE CONTROLLED IN SUCH MANNER THAT FLUSHING OF SEDIMENT 1S LIMITED AS MUCH AS PRACTICAL AND n
DISCHARGE l..L_ Z 1 TERE WITH T F A RAV & RIP-R P H K ~ Q DISCHARGE FROM PUMP SHALL BE FL D HE USE 0 G EL A C EC DAM OR OTHER APPROVED FILTERING DEVICE, a
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t1~1 l1A~, lA VA i ~1 / l 1 / i ~--~i r / ~ ~ i~ ~ ~ I 1 ~ I I I ~ ( i I / l t , PRINCIP.AC WEIR = 6tgT0 I i 1 r~ 1'~•r r r 1 1 I r II i 1 ,r 1 I ; / ! , UP ER ORIFICE ~ 608.00 ` 1 ~ r r ~ r / I 1 I ' ~ . ' , ~ ~~;va . , •
1 ~1~ \ I~ / / / ~ I I ~ ( l ! l Ill . V11 ~ ~ 1 ~ 1 ~ t I I ( ~ I / / r~ / / ~ / ~ ~ ~ 11 I I I I l I ( r / / f c / ! P / ? ? I I I 1 '.1 r 7 1 1 r ,i I i I 1 / r I ~ r 41-1~' - J l r %LOWER ORIFICE 607,00 I + 1 1 x 1 r•• l~ 1 1 t a i l I I ~ - I / ! - , I I I i ; t 1 r l ~.1 1 / i I I i ! i 1 j I /
. ~ A ~ ~ I f / 1 l ! / ~ / / / ~ l ` \ 1 I/ 1 ~ I ~ A ! ~ J I / / PERMANENT POFSL - 607.00 ~ \ \ I I I 1 f , ; 1 I , I ~ I ( ; , / ! J / ! / BOTTOM P001.'a 604.00 I I I I; r l , 1.,• I/ J r I I I i i i
111 1'1`I Il It II ! l ( / l / I / ~ i/ /~i~i ~i _ ~ 1 1 !r7 1 I ~ ~ i 1 ( 1 / / I ~ , I I ~ ( 1 ~ ! / r i / / ~i ~ ~ ` I ~ I I I / ! / , l'l ~ ~ I I I i ~ I I I! r I ~ ~ ! ! / / / / / / ~ ~ ~ _ ~ ~ ? 1~ A ' I I 1 I 1 ~ ( ! I / / ( I r / JJ FA EA 0"- " LOW M SH ~ 46.60 ' I i ' 1 r r ~ 1 1 l~' i ~ I i I ~ ~ ~v i I 1 e / ~ J J / SUR CE .AR 9 ~ xi v t~ I ~ I r 1 1 1 I I v v I l '
11 t l I i I. I ~ I I I I I II 1 I 1 / '7~ / 1 rr / / , ~ - \ ,,f 1 I I .,.1 I 1 ( x,11 ( / I ' ~ A V 1 I ~ f r l ~ 1 I r''~'` .i' ~ I I ~ I I r SURFACE AREA 9 18 M1D~'iNARSH ~ 90A~ ~ v v~ I i I I I I I I I I r/ 11,~ ~ ~ ---'t / M \ 1 \ I / \ ~ ~ } I r 1
1 III 1 I I I I 1 !1 ~ I ~ i t ,rr / ! ~ ~ l~ Y. v ti ~ ! ( fr 1 I V ~ I 1 I l l III i! 1 v f/ I I ~ i ! i ~ r - A \ V I ~ 1( 1 ~ I 1 ( r J SU FACE AREA 18 - HIGH MARSH ~ j5,50C~X' ~ I i I ~ I ( ; , - r ~ I ; I r ~ l 1 ~ V A ~j I 1~ I I I I r I I I j i I l' t~ , I r r~SED1MENT FOREBA AREAS NOT INCLUDED ~ ~ \ l l l I I l i r I ,
11 1 I l I i I I I l I I 'I I f 1 ~ l~ I I V I :-a ~ t~ v I I I ! I ! 1 _ 1 1 - I l , I i l ~ ~ I I ! I t I f / -,4; ~ 1 v 11 I I I I f I , ~ l ~ / IN SURFACE AREA CALCULATIONS~__? ~ , 1 I I , I ~ I ! , / - t '
jl I~II111'I~I ~ ~ /f f! I ~ I ~/i I( / ~ ( , ! ~ v l~ 1 y l I v ~ ~ ~ ~ ~ I I , i 1 I I ' I ! ( 1 f~l I1~I1 I I / / I ! 1 ,(l ~ 1 1 '\l ~ - ~ i I I i ( I ( I I I I l i l I I I I ~r ! / / l l ` I r ~ - ~ ~ t.. I 1 ~ I 1 ~ ~ ~ i ~ 1 i I I ~ t i ( i lr r !1 rrl R\ ` ~ II I I j I I L Ij I 7 ~ r/ r' i" J l I 'i I i ~ / J ~
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i/~~ ~ I I-1 ~ ~ i f I~ F ( - _ _ 1 ~ ~ 1 rj 1 t r. ,-N3P.fOREBAY+~60700 \ \ \ ' \ 1 ~ 1 / r/ ! / t / - I i ! - r t ~ r p 1 ! / / SPILLWAY ~ 60780 , Q \ \ \ \ ? \ 1 / , t ! ~ ~ r""~ _ - ' ! t r ` r / ! / t I ~ r
~ ; i . . l ~ _ - I I / r' , ~ STORAGE = 6,710 ~LGfT, A ? ' ~ , A\ \V A ~ ` AV A 4 / ! / / ~ i~' ~ r' ~ ~ - - . r i ~ r /r ~ r (n
~ i 1 w F. l ~w._: i' (SlORACE`@ 607,00) \ 's 1 \ \ 1 \ ti` \ 1 J I i' ! J I / r _ ~ % ! ~ I ~ t• S r _ _ ~ ~ ! r ? 'I I 1 ~ ~ 1 I ~ 1 1I~ I II I 1 lI - r / 1~? ! i J
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\ ~ t 1 1. i ~ ~ \ \ l • . ~ . . • , v: ` ~ ' s TO PERMANENT POOL \ 1'1\\ ~i - ~ ~ ~ ~ I ~ sir / EIEVATION'vQPRON VNDIH ~ \ \ ` . -tl'2`.•:; ' , I I f / / TIJRE W~IXHAW PARKWAY ~ . y; ,!~I - ~ ? l ~ r / r P OPO ED 12D 'PUBLIC ~f2 W ~ ,
~ ~ 11 A i ~I I I ` `1•„ - ~ MIN. SHAl1 BE~'Zp fT ~ AVi . ~ \i~~j~AVA~: 1 •-fiQ64`~' - .;-a0~~'- f1..4''0fP1R,;~ll 1 1t r / r (rR ~ - ~ _ ,
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~ I APPROX. O,~J1 A~ i ~ l ~ ! ! ~.I ~ \ ~~~~s i -L M1 .t.~.. - ~ TO PERMANENT P,RQL _.-.a--` _ . _ _ _ - - v ~ _ x• _ C _ ~ y..._
1 - d I h ~ / S ~ % ` 1 v'` v 1A ~ ~ ' . ` ~ ~ / ~ ` / lI~'"lI ! 1 ~ ` ~ ,i' SE'DIMENf /FOREBAY 1 ~io v ~ws:~ ~ . ,1l 11 1 ` ' f !,k l l r, l ! l i ; 5'IiB-E1_~..I:ti >.1 1' 1 . ._.T' ~C~GI('RQ~'aAP.BLiAI-Wil~7H"'~' ~ _ _ _ _ _ . _ r` ~ -L..... _ r^ ~ --r-
~ ~ 1v v v' 1vv " I • r I I / , l ! ' ' I~7C TOP fOREBAY = BOZ00 _ x . ~ ~ ` ,v1vl.i 1 //,///!lrr,/i 1~REr1=3.U~1 9C)i~',~.t SP/LEWAY=608,50 ~ _ I I „mot s+--- _ vJ `I - ...1.... ~ I _ . _ - - - I
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10' VARh ' VARIES 12' VARIES VARIES VARIES 4' VARIES
H1CN MARSH MID MARSH LOW MARSH CONCRETE sLAe roP 1$" - 36" 9" - 18" 0" - 9"
W/MANHDLE ACCESS
COVER
TOP OF EMBANKMENT 'A" PERMANENT WA ER LOW MARSH
EMERGENCY SPILLWAY "B° QUALITY POOL PLANTINGS
2x,5" WFIR,(~CN SlDf)-"C" RMWATER
RIP-RAP APRON pQ (ExisrlNC) S1 INLEt z
EX 5x5 O,D r,,./' ~ OUTLET ~
STRUCTURE Riac _ " " 5 W
_ _ - . {{IFS-' _.~.~,:,r.,._~.__.-~._-.~_„ ~
~-INVERTED SIPHG4V -UA ~N eELOw PERA<. J VARIES
^ rte',. ~ POOL ELEY O ~ ~y
~f 1~ Y__ ~ ~ EX, ANTI-; ~ N 0_,r EX. ANTI-SEEP ~ , ~ ~ FOREBAY w'
C0ILARS C0ILARS ~ ` W ~
~
DISHCARGE PIPE 1~' PROVIDE R!P-RAP I _ f- APRON FROM DISCHARGE
PIPE TO fOREBAY BOTTOM
(10'WlDE, 18'DEP1H)
" AQUATIC VEGETATION TO BE PLANTED IN ALL MARSH ZONES
Q O
U
~o WET DETENTION BASIN ~ D•E•N•R• .
. ~
~ ~
A. yAy ropy y~y •yDy yi.y yF,y [ l , U G 11p~1 ~
POND ELEK ELEV. fLEK SIZE INV, SIZE ENV, DEPTH ^ V.1
U~ 'd ~ ~1 622.00' 618.00' 612.70' 1-6" 608.00' 3" 607.00' 3' d) ~ ~
cCi ~
~ M . ,.y ~ ~
NOTES NOTES U • Q~ v
0 ~ ~
1. AQUAT 1. AQUATIC VEGETATION LIST FOR NORMAL POOL DEPTHS (REFER ALSO TO TABLES 4.1, 4.2 & 4.3 OF THE STORMWAT~;R BEST MANAGEMENT PRACTICES DESIGN MANUAL): ~
UP TO ~ ~ UP TO 3", MARSH H181SCUS UP TO 6".~ COMMON THREE SQUARE UP TO 12°.• ARROW ARUM 12" & MORE. COONTAIL ~ ~ ~
RICE CUTGRASS ARROWHEAD/DUCK POTATO DUCKWEED c~ ~ y cd SEDGES BUSHY BEARDCRASS POND WFED a
SPATTERDOCK rr r~
SWITCH GRASS WATERWEED LIZARDS TAIL WILD CELERY • ~ SWEET FLAG PICKERELWEfO
SOFT-STEM BULRUSH ~-d ~ ~
SMARIINEEO CCU , ~
SOFT RUSH s., WILD RICE ~
~ ~ ~ ~
2. A VAR. TO PLA 2. A VARIETY OF PLANTS SHALL BE USED 1N EACH OF THE MARSH PLANANC ZONES TO PROVIDE A DENSE COVERAGE', FOR MORE 1NFORMA]ION RELATING ~ TO PLANTING OF THE SPEC1fIE0 SPECIES, CONSULT WITH AN £NVIRONOMENTAL ENGINEER OR WETLANDS CONSULTANL ~.~j ~r
a
3, EMBAN 3, EMBANKMENT BETWEEN FOREBAY AND POND SHALL NAVE A UAIIC VEGETATION FR M A OVE A ATI ~ w a 4 0 B QU C VEGETATION LIST
4, INSPEG 4, INSPECTION SCHEDULE, AS SPECIFIED BELOW AND AS STATED 1N THE WET (WETLANDS) BASIN OPERATION AND MA+'NTENANCE AGREEMENT
OPERA OPERA )ION AND MAINTENANCE AGREEMENT SHALL BE 1NCORPORATEO AS A CONDITION OF THIS WRITTEN STORMWATER MANAGEMENT PLAN. ~ ,
INSPECTION INSPECTION ACITIVITIESr
~
A) TESTIN A) TESTING OF THE EMERGENCY DRAIN PIPE VALVES (1F APPLICABLE). \
B) VISUAL C) V1SUA1 B VISUAL INSPECTION OF ORAWDOWN ORIFICE. ) C) VISUAL INSPECTION OF THE EMERGENCY SPILLWAY,
D) VISUAL D) VISUAL INSPECTION OF THE POND RIM AND SLOPES
E) MEASU ORIFIC! E) MEASUREMENT OF THE WET POND DEP1H AT THE DAM END OF THE DETENTION POND (DISTANCE FROM PERMANENT POND ORAWDOWN ~ ~ ORIFICE INVERT TO BOTTOM OF THE POND ,
F) VISUAL F) VISUAL INSPECTION OF ALL STDRMWATER STRUCTURES ON THE SERVED SITE FEEDING THE DETENTION POND. ~ ~V~
G) VISUAL H) VISUAL G) VISUAL INSPECTION OF THE TOTAL SlIF DRAINAGE BASIN FOR ADEQUATE GROUND COVER LEADING TO THE STABILIZED SITE, ~ ~ H) VISUAL INSPECTION Of UPSTREAM (OFF-S11E) AREAS FEEDING INTO TN£ SIlE DRAINAGE BASIN FOR POTENTIAL OFF-SITE SEDIMENTAIJON
SOURG SOURCES ~
~
MAlNTENAN MAINTENANCE ACTIVITIES'
A) IF THE A) If THE PERMANENT POND DEPTH IS MEASURED TO BE LESS THAN 3/4 OF ME DESIGNED PERMANENT POOL DEPTH, THE POND SHALL 8E
ORAlNE IF THE DRAINED AND CLEARED OF SEDIMENT TO THE DESIGNED FULL DEPTH AND DISPOSED OF OFF-S17E & RESEEDED AS REQUIRED TO PREVENT EROSION !f THE fOREBAY 1S MEASURED TO BE LESS THAN 3/4 THE DESIGNED DEPTH, THE SEDIMENT SHALL BE CLEANED OJT TO THE REQUIRED
HE1GN 1 HEIGHT AND DISPOSED OF OFF-SITE RIP-RAP IN FOREBAY FROM DISCCARGE PIPE MAY NEED TO BE REMOVED Ah'D REPLACED DURING
CLEANi FOREB~ CLEANOU7; WHICH W1Ll REMOVE SEDIMENT FROM RIP-RAP APRON. SEDIMENT REMOVAL MUST BE PERFORMED AFTER EACH STORM EVENT FOREBAY WILL REQUIRE SEDIMENT REMOVAL MORE FREQUENT THAN POND,
B) RISER B) RISER MECHANISM SHALL BE REPAIRED AND CLEANED AS NECESSARY TO BRING THE MECHANISM UP TO FULLY FUNCTIONAL CONDITION
AS OR AS ORIGINALLY DESIGNED AND SPECIFIED,
C) UNIfOh D) UNIFOh C) UNIFORMLY GRADE AND STABILIZE ANY DISTURBED AREAS COMPROMISING THE DETENTION POND RIM. z D) UNIFORMLY GRADE AND STABILIZE ANY DISTURBED AREAS ON THE REMAINDER OF THE SITE.
E) CLEANi E) CLEANOUT STAKES SHALL 8E PROVIDE IN THE POND AND FOREBAY INDICATING ONE-QUARTER AND FULL DEPTH. I U J
F) POND C) IN THE F) POND SHALL BE INSPECTED AFTER EACH SIGNIFICANT STORM EVENT AND AT LEAST MONTHLY C) IN 1HE EVENT POND MUST BE DRAINED FOR MAINTENANCE, A MUD PUMP SHALL BE USED TO DRAIN lHE PERMANENT POOL AND SEDIMENT ~ J
FOREB~ FOREBAYS. DRAW DOWN SHALL BE CONTROLLED 1N SUCH MANNER THAT FLUSHING OF SEDIMENT 1S LIMITED AS MUCH AS PRACTICAL AND
DISCHA l.L Z DISCHARGE FROM PUMP SHALL BE FILTERED WITH THE USE OF A GRAVEL & RIP-RAP CHECK DAM OR OTHER APPROVED F111ER1NG DEVICE ~ Q
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