SW5100601_HISTORICAL FILE_20120302

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
a
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
py HISTORICAL FILE
DOC DATE
YYYYMMDD

Co1e.Jenest
& Stone
Shaping the Environment
Realizing the Possibilities
Land Planning
Landscape Architecture
Civil Engineering
Urban Design
A uth Tryon Street, Suite 1400 Charlotte, NC 2820
p+6 1555 f, 704 376 7851 w4www.colejeneststo0
February 22, 2012
Mr. Mike Randall
North Carolina Department of Environment and Natu
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Charlotte
Raleigh
Wilmington
L C," �,, Y E,
MAR -- 2 2012
I ResourcesilRic DEAR
r rl Rc,.lnf!i � �if�10E i
Re: 50236 — Chatham County Northeast District Park
Dear Mike:
Construction of the storm water management devices for the referenced project, as
permitted under the North Carolina Department of Environment and Natural Resources
Division of Water Quality (Storm Water Permit Number SW5100601), has been
completed. A copy of the Designer's Certification covering Dry Detention Basin 1 and
Bioretention Area 1 is enclosed.
Please let us know if you require anything further.
Best regards,
COLEJENEST & STONE, P.A.
R. Todd Fisher, PE
Senior Project Manager
smm
Enclosure
cc: Mr. Brian Stevens — CCPW
ii4r. Michael S. Coie, Sr., rnLr';, LEE.D r,r= BDTC- CJS
Mr. Daniel J, McGlamery, PE, LEER A? Bl — CJS
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FEB 2 7 2012 U
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P:156SKPROJ%50236�_ Correspondences520121MiscT2221 Randall, M-. Stormwater Certiricalion_doc

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2*uth Tryon Street, Suite 1400 Charlotte, NC 282Charlotte
p,70. ,76 1555 F+704 376 7851 ur1.www.Colcieneststo10, Raleigh
Wilmington
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ColeJenest
& Stone
Shaping the Environment
Realizing the Possibilities
Land Planning
Landscape Architecture
Civil Engineering
Urban Design
Chatham County Northeast District Park
Storm Water Permit No. SW5100601
Chatham County
Designer's Certification
I, R. Todd Fisher , as a duly registered Professional Engineer in the State of
North Carolina, having been,authorized to observe periodically the construction of the
project,
Northeast District Park, Chatham County, North Carolina
(Project)
for Chatham County (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist on Page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification;
1. Outlet Control Structure at Dry Detention Basin 1 installed slightly lower than
plan elevations (±2.5"); however, required flow attenuation has been attained.
2. Design storage volumes not achieved at Bioretention Area 1; however,
minimum required surface areas and volumes have been attained:
Surface Area at Lowest
Storage Volume (ft3)
_-.........,Plantin..9.Elevation ....(n2)......_.............
............. --
Bioretention
3 Min.
Min.
Area
Design i Re 'd. As -Built
Desi n Re 'd. As -Built
1
2014 1704 I 1842
2014
I 1704
i 1842
SEAL
Signature: 1Cll
Registration Number:1� 5
Date: 2- 22-, Z
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SEAL
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P.1SnSKPROA502364_CorrespondenceM20124MiscY0222 Engineer CertiTicalion (Slarmwater).docx

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ColeJenest
& Stone
Shaping the Environment
Realizing the Possibilities
Land Planning
Landscape Architecture
+
Civil Engineering
Urban Design
21outh Tryon Street, Suite 1400 Charlotte, NC 2820
p+704 16 1555 f+704 376 7851 ar1+www.colejenestston0,
Chatham County Northeast District Park
Storm Water Permit No. SW5100601
Chatham County
Certification Requirements:
Charlotte
Raleigh
Wilmington
1. The drainage area to the system contains approximately the permitted
acreag
e.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is raded such that the
runoff drains to the system. (?K �('M'�• � �
IIIA_ 4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan. I — Mje�j,
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
At8. All slopes are grassed with permanent vegetation, per the vegetation plan.
9. Vegetated slopes are no steeper than 11.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been provided.(gy Fs7�o1
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided. (N.,
14. All required parts of the system are provided.
15. The required system dimensions are provided per the approved plans. (A,,
+ P:SSOSKPROJ1502361_Correspandences520121Misc10222 Engineer Certification (Starmwater).docx

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