SW6200301_Add Info Request_20200708

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRIAN WRENN
Acting Director
Jason Miles
Lose Design
2809 Foster Avenue
Nashville, TN 37210
NORTH CAROLINA
Environmental Quality
July 8, 2020
Subject: Request for Additional Information
Stormwater Permit No. SW6200301
Willow Lakes Sports Complex Phase II (PN 86271)
Cumberland County
Dear Mr. Miles:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on March 16, 2020. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
1. The Supplement EZ form shows the design storm as 6". However, the water quality
design storm is 1" in non -coastal regions and the design storm used for the 10-year peak
flow event was 7.91 ". Why was 6" listed as the design storm?
2. The grass swale detail on Sheet C4.01 shows the side slopes as 2: 1. The maximum
allowable side slope for vegetated conveyances on low density projects is 3:1 [15A
NCAC 02H .1003(2)(c)(i)].
3. Please provide calculations that show that the specified rip rap aprons will be sufficient to
prevent erosion during the 10-year storm.
4. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other
documents. Please only submit those plan sheets which have been revised as a result
of these comments. Pdfs must be uploaded using the form at:
https:Hedocs.deq.nc.gov/Forms/SW_Project Submittal
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received by this Office prior to August 7, 2020, or the
application will be returned as incomplete. The return of a project will necessitate resubmittal
of all required items, including the application fee. Please reference the State assigned project
number SW6200301 on all correspondence.
D E Qbi�� North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
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If you need additional time to submit the information, please submit your request for a time
extension to the Division at the contact below. The request must indicate the date by which you
expect to submit the required information. The Division is allowed 90 days from the receipt of
a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
If you have any questions concerning this matter please feel free to contact me at
Corey.Anen(ibncdenr.gov or [phone]. Please note that due to the ongoing Covid-19
pandemic, I will be teleworking and will be most easily reached by email.
Sincerely,
Steven C. Anen, PE
Environmental Engineer
Stormwater Program
cc: Fayetteville Regional Office