20050732 Ver 26_Stormwater Approval_20130308

Pat McCrory
Governor
FWA
'„'`►i®
�" ®ENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Charles Wakild, P. E.
Director
March 8, 2013
Mr. Bill Mumford, Assistant Vice President
NNP — Briar Chapel LLC
16 Windy Knoll Circle
Chapel Hill, NC 27516
Subject Property: Briar Chapel, Phase 7
APPROVAL OF MODHUD STORMWATER PLAN
Dear Mr. Mumford:
John E. Skvarla, III
Secretary
DWQ Project # 05- 0732v26
Chatham County
On January 11, 2008, the Division of Water Quality (DWQ) 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 temporary stormwater
management plan (SMP) for roadway portion of Briar Chapel — Phase 7, dated January 23, 2013, was
received on January 29, 2013.
The DWQ approves the temporary §W-- as satisfying Condition 10 of the General Water Quality _
Certification until the remainder of Phase 7 is developed. The final SMP for Phase 7 must be received
6d approved by the DWQ before construction of the lots is commenced. The approved final SMP foe
Phase 7 must be constructed and operational before any permanent building or other structure associates
ith that phase is occu ied
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 to
you follow the conditions listed in the General Water Quality Certification for the project and the
following additional conditions listed below:
1. The temporary SMP approved by the DWQ consists of three (3) level spreaders and all associated
stormwater conveyances, inlet and outlet strictures, and the grading and drainage patterns
depicted on plan sheets dated January 23, 2013. The plans and specifications for Phase 7
approved by DWQ are incorporated by reference into this approval and are enforceable by DWQ
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Mr. Bill Mumford
March 8, 2013
Page 2 of 2
provided however that any modification of the design for the stormwater management system that
is accepted by DWQ shall take precedence over the original plans and specifications.
The maximum allowable drainage area for the approved level spreaders shall be in accordance
with the table below. Built -upon area includes, but is not limited to, roofed structures, asphalt,
concrete, gravel, brick, slate, coquina and parking areas, but does not include raised, uncovered
open slat decking or the water surface of swimming pools. Any changes to these maximum areas
shall require the applicant to submit and receive approval for a revised stormwater management
plan by the DWQ.
Levels reader #
Max. drainage areas
Max built upon area s
2
163,077
47,505
3
243,922
62,469
4
151,391
87,075
2. 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 either public rights -of -way, dedicated common areas or
recorded easement areas. The final plats for the project showing all such rights -of -way, common
areas and easement areas shall be in accordance with the approved plans.
3. Maintenance activities for the level spreaders shall be performed in accordance with the notarized
O &M agreements signed by Kevin Graham (Vice President, Operations) on January 16, 2013.
The O &M agreement must transfer with the sale of the land or transfer of
ownership /responsibility for the BMP facility. DWQ must be notified promptly of every transfer.
4. The applicant and/or authorized agent shall provide a completed Certificate of Completion form
to the DWQ within thirty (30) days of project completion (available at
http:H portal .ncdenr.org /web /wq /swp /ws/401 /certsandpennits/apply /forms).
Thank you for your attention to this matter. If you have any questions or wish to discuss these matters
further, please do not hesitate to contact me at (919) 807 -6381.
Sincerely,
Annette Lucas, P.E.
Wetlands, Buffers and Stormwater Compliance and
Permitting (Webscape) Unit
AML /aml
Cc: Becky Fox, EPA
USACE, Raleigh
Cherri Smith, DWQ Raleigh Regional Office
Chatham County Public Works Dept., P.O. Box 1550, Pittsboro, NC 27312
File Copy
Filename: 050732v26BriarChapelPhase6North (Chatham)_SW_Mo4 Approve.docx