20050732 Ver 23_Stormwater Approval_20120730

i
FKWA
MCD� R
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Charles Waklld P E
Director
July 30 2012
Mr Bill Mumford Assistant Vice President
NNP —Briar Chapel LLC
16 Windy Knoll Circle
Chapel Hill NC 27516
Subject Property Briar Chapel, Phase 6 North
Dee Freeman
Secretary
DWQ Project # 05 0732v23
Chatham County
APPROVAL OF MODIFIED STORMWATER MANAGEMENT PLAN
Dear Mr Mumford
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 0157 acre of 404 wetlands and to
permanently impact 1 666 linear feet of stream and 0 1590 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 for
Briar Chapel — Phase 6 North dated June 18 2012 was received on June 19 2012
The DWQ approves the SMP as satisfying Condition 10 of the General Water Quality Certification This
approval is for the purpose and design that you described in your application If you change your protect
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 General Water Quality Certification for the protect and the
following additional conditions listed below
1 The SMP approved by the DWQ consists of one (1) wet detention pond and all associated
stormwater conveyances inlet and outlet structures and the grading and drainage patterns
depicted on plan sheets dated June 8, 2012 The plans and specifications for Phase 6 North
approved by DWQ are incorporated by reference into this approval and are enforceable by DWQ
provided howc�er that any modification to the design of the stormwater managemcn Oyaterr
that is accepted by DWQ shall take precedence over the original plans and specifications
1617 Mad Service Center Raleigh North Carolina 27699 1617
Location 512 N Salisbury St Raleigh North Carolina 27604
Phone [phone] FAX [phone] Custom r Service 1 871 62 6748
Internet wwa ncwaterou lity oro
P r I Op ) u t Air m e 4 o mp
NorthCarohna
Natmrall.ff

Mr Bill Mumford
J41} 30 2012
Page 2 of 2
2 The maximum allowable drainage area for the approved wet detention pond shall be 901 260
square feet and the maximum aiiowame built upon area within that arainage area snall be
446 930 square feet 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 received approval for a revised stormwater management
plan by the DWQ
3 The footprint of all Qtorm -ater management devices as well as stn additional 10 font 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
4 Maintenance activities for the wet detention pond shall be performed in accordance with the
notarized O &M agreements signed by you on June 14 2012 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
5 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 Hportal ncdenr org/web/wq/swp/ws/40 I /certsandperm its/appl /fy orms)
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
CmQ
Annette Lucas PE
Wetlands Buffers and Stormwater Compliance and
Permitting (Webscape) Unit
AML /aml
cc Becky Fox EPA
USACE Raleigh
Lame- Witherspoon DWQ Raleigh Regional Office
Chatham County Public Works Dept P O Box 1550 Pittsboro NC 27312
File Copy
Filename 050732v23BnarChapelPhase6North (Chatham)_SW_Mod_Approve docx