20150615 Ver 1_More Info Letter_20160513

Water Resources
ENVIRONMENTAL QUALITY
May 13, 2016
CERTIFIED MAIL: 7012 3050 00019399 0508
RETURN RECEIPT REQUESTED
MGP Retail Consulting, LLC
Attn: Ryan Berger, Construction Manager
1500 Sunday Drive, Ste. 101
Raleigh, NC 27607
Subject: REQUEST FOR ADDITIONAL INFORMATION
MGP Rockingham Retail Development
Dear Mr. Berger:
PAT MCCRORY
6ove; mut
DONALD R. VAN DER VAART
,Seri elan
S. JAY ZIMMERMAN
DIA CIO/
DWR # 15-0615
Richmond County
Rowe
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1 g 2o1s
On June 22, 2015 the Division of Water Resources (Division) received your application dated June 15,
2015, requesting a 401 Water Quality Certification from the Division for the subject project. A Request
for Additional Information was sent on July 15, 2015. Partial additional information regarding the
stormwater management plan has been received by the DWR Central Office from Bohler Engineering,
but there has not been enough information provided to complete the review of the stormwater
management plan for this project. The Division has determined that your application is incomplete and
cannot be processed. The application is on -hold until all of the following information is received:
1. Per GC 3890, this project is required to provide a stormwater management plan to protect
water quality. Please see Appendix A of the General Certification, available at:
http://Portal.ncdenr.org/web/wq/swp/ws/401/certsandpermits/gcs, and submit the
following items:
Please provided a completed copy of the Wet Detention Basin Supplement Form
including the Required Items Checklist with initials and indication of Plan Sheet
for each item.
Revise plans as necessary to include all items on the Required Items Checklist on
the Supplement Form (e.g. grading and drainage plan with delineated drainage
basins with Rational C coefficient per basin, vegetated shelf planting plan, etc).
The proposed roof drains do not appear to convey flow into the stormwater
collection system but rather to a depression that drains to a roadside ditch.
Please ensure that runoff from all impervious areas is conveyed to the proposed
wet detention basin.
State of North Carolina I Environmental Quality I Water Resources
225 Green Street -Suite 7141 Fayetteville, North Carolina 28301-5043
910-433-3300

4. Revise the wet detention basin cross section to specify side slopes of 3:1 or less.
5. Revise the orifice diameter shown on both the riser structure detail and water
quality orifice detail to be consistent with design calculations (1" instead of 4"
and 1.25", respectively).
6. Please provide calculations on the outlet velocity from the wet detention basin
outfall prior to discharge to adjacent wetlands. Note that a non-erosive velocity
of two feet per second or less must be achieved for the peak flow from the 10 -
year storm.
Pursuant to Title 15A NCAC 02H .0502(e), the applicant shall furnish all of the above requested
information for the proper consideration of the application. If all of the requested information is not
received in writing within 30 calendar days of receipt of this letter, the Division will be unable to
approve the application and it will be returned. The return of this project will necessitate reapplication
to the Division for approval, including a complete application package and the appropriate fee. Please
respond in writing within 30 calendar days of receipt of this letter by sending two copies of all required
items at the specified scales for each BMP that is proposed to the 401 & Buffer Permitting Unit, 1617
Mail Service Center, Raleigh, NC 27699-1617.
Please be aware that you have no authorization under the Section 401 of the Clean Water Act for this
activity and any work done within waters of the state may be a violation of North Carolina General
Statutes and Administrative Code.
Please contact Cory Larsen in the DWR Central Office at (91) 807-6379 or [e-mail] for
questions related to the stormwater plan review or Chad Turlington at [phone] or
[e-mail] at the Fayetteville Regional Office for general questions related to the 401
Certification review.
Sincerely,
Belinda S. Henson
Regional Supervisor
Division of Water Resources
Water Quality Regional Operations Section
cc: Darrin Peine — S&ME, Inc. (via email)
Andrew Allison, E.I. — Bohler Engineering NC, PLLC
Brian O'Kane — Bohler Engineering NC, PLLC
Brennan Dooley - USACE Wilmington Regulatory Field Office (via email)
DWR FRO 401 files
DWR 401 & Buffer Permitting Unit