20050732 Ver 30_Stormwater Approval_20150227

Dr;
North Carolina Department of Environment and Natural Resources
Pat McCrory Donald I. van der Vert
Governor Secretary
February 27, 2015
DWQ Project # 05 -0732 V30
Chatham County
Mr. Bill Mumford, Assistant Vice President
NNP — Briar Chapel LLC
16 Windy Knoll Circle
Chapel Hill, NC 27516
Subject Property: APPROVAL OF STORMWATER PLAN
Briar Chapel - SD Commercial
Dear Mr. Mumford:
On January 11, 2008, the Division of Water Resources (DWR) issued a revised 401 Water Quality
Certification to temporarily impact 339 linear feet of stream and 0.157 acre of 404 wetlands and to
permanently impact 1,666 linear feet of stream and 0.159 acre of 404 wetland in order to
construct the Briar Chapel Subdivision in Chatham County.
In order to meet Condition 10 of the 401 Certification for this project, a stormwater management
plan (SMP) for the Briar Chapel - SD North Commercial dated January 20, 2015 was received on
January 23, 2015. This approval is for the purpose and design that you described in your
application. If you change your project, you must notify us and you may be required to send us a
new SMP. This approval requires you to follow the conditions listed in the Water Quality
Certification for the project and the additional conditions listed below:
1. The SMP approved by the DWR consists of a wet detention basin and a bioretention cell
and includes all associated stormwater conveyances, inlet and outlet structures, and the
grading and drainage patterns depicted on plan sheets dated January 20, 2015. The plans
and specifications for the SD North Commercial project are incorporated by reference into
this approval and are enforceable by DWR provided however that any modification of the
design for the stormwater management system that is accepted by DWR shall take
precedence over the original plans and specifications.
The maximum allowable drainage and the maximum impervious areas for the wet
detention pond and the bioretention cell shall be those provided in the "401 Narrative &
Supporting Calculations — Briar Chapel Development —SD North Commercial" dated
Division of Water Resources — 401 & Buffer Permitting Unit
1617 Mail Service Center, Raleigh, North Carolina 27699 -1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: 919 - 807 -63001 FAX: [phone]
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer — Made in part by recycled paper

NNP— Briar Chapel LLC
DVVR Project #05-U7]2V3O
Sturmwater Plan Approval
Page 2 of 2
January 20, 2015. Any changes to these maximum areas shall require the applicant to
submit and receive approval for a revised stormwater management plan by the DWR.
The footprint of all stormwater management devices as well as an additional 10-foot wide
area on all sides of the devices shall be located in public rights-of-way, dedicated common
areas or recorded easement areas. The final plats for the project shoxvingaUsuchrights-
of-vvay,connrnonareasandeasennentareassheUbeinaccordancgvviththeapproved
plans.
4. Maintenance activities for the wet detention pond and the bioretention cell and related
stormwater devices shall be performed in accordance with the notarized O&M agreements
signed byLaurie Ford (Vice President, Operations) on January 3O\2O15. The O&M
agreements must transfer with the sale ofthe land or transfer ofownership/responsibility
for the BIVIP facility. DWR must be notified promptly of every transfer.
The applicant and/or authorized agent shall provide a completed Certificate of Completion form to
the DWR within thirty (30) days of project completion (available at
Thank you for your attention to this matter. If you have any questions or wish to discuss these
matters further, please contact Boyd DeVane at [phone].
Sincerely,
Karen Higgins, Supervisor
4O1[& Buffer Permitting Unit
[c: USACERa|eid) Regulatory Field Office
DVVNRR]file
Chatham County Public Works Dept,P.O. Box 155[1Pittsboro,NC 27312
401 Qi Buffer Permitting Unit file
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