20061804 Ver 5_Stormwater Approval_20130318

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North Carolina Depaitment of Enivironment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P E. John E. Skvarla, III
Governor Director Secretary
March 18, 2013
DWQ Project # 06 -1804 v3
Johnston County
Riverdell Company
Attn: Ms. Rebecca Flowers
4880 NC Highway 42 East
Clayton, NC 27527
Subject Property: The Village at Flowers Plantation — POD NW8
UT to Mill Creek [030402, 27 -39, WS -IV, NSW]
APPROVAL OF STORMWATER MANAGEMENT PLAN
Dear Ms. Ms Flowers:
On March 5, 2007, the Division of Water Quality (DWQ) issued a 401 Water Quality Certification and
Authorization Certificate per the Neuse River Buffer Protection Rules (15A NCAC 2B.0233) to place fill
within or otherwise impact the following:
Type of Impact
Amount Approved (units)
404 /Wetlands
0.122 (acre) — permanent
404/Wetlands
.0005 (acre) —temporary
Stream — perennial
868 (If) — permanent
Stream — perennial
160 (If) — temporary
Stream — intermittent
416 (If) — permanent
Buffer —Zone 1
79,584 (so
Buffer — Zone 2
39,603 (sf)
In order to meet Condition 9 (stormwater management) of the Water Quality Certification and Buffer
Authorization for this project, a stormwater management plan (SMP) for Pod NW8, dated February 1,
2013, was received on February 8, 2013.
The DWQ approves the SMP for Pod NW8 as meeting Condition 9 of the Water Quality Certification and
Buffer Authorization. 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 diffuse flow
plan. This approval requires to you follow the conditions listed in the Water Quality Certification and
Buffer Authorization for the project and the following additional conditions listed below:
1 _Prior to construction of roje
the pct, you shall provide DWQ with an updated plan sheet C-4 that
provides a specification for the sod that will be planted on the surface of the bioretention cell
(including the requirement that the sod be grown in a non - clayey medium or washed prior to
installation) and for watering instructions to establish the sod. -In addition, please specify either',
a filter fabric or choking stone between the washed sand and stone layer at the invert of the
ioretention cell on your revised plan sheet C -4
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fhe Village at Flowers Plantation — POD W/8
Page 2 of
March 18, 2013
2. The SMP approved by the DWQ consists of one (1) grassed bioretention cell and all associated
stormwater conveyances, inlet and outlet strictures, and the grading and drainage patterns
depicted on plan sheets dated December 21, 2012. The plans and specifications for Pod NW8
approved by DWQ are incorporated by reference into this approval and are enforceable by
DWQ, provided however that any modification of the design for the bioretention cell that is
accepted by DWQ shall take precedence over the original plans and specifications.
3. The maximum allowable drainage area for the approved bioretention cell shall be 330,620
square feet and the maximum allowable built -upon area within that drainage area shall be
115,717 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 receive approval for a revised stormwater
management plan by the DWQ.
4. The footprint of the bioretention cell 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 showing all such rights -of -way, common areas
and easement areas shall be in accordance with the approved plans.
5. Maintenance activities for the bioretention cell shall be performed in accordance with the
notarized 0 &M agreements signed by you on January 10, 2013. The 0 &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.
6. 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: / /porta I. ncde nr.ore/ web /wq /swo /ws /401 /certsandpermits /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,
(3,
Annette Lucas, P.E.
Wetlands, Buffers and Stormwater Compliance and
Permitting (Webscape) Unit
cc: Cherri Smith, DWQ Raleigh Regional Office
Becky Fox, EPA
USACE Raleigh Regulatory Field Office
DLR Raleigh Regional Office
Bob Zarzecki, S &EC, P.A., 11010 Raven Ridge Road, Raleigh, NC 27614
File Copy
Filename: 06: 804Ver4TheVi llageAtFlo %l,ersPlantationPeachtree • hase2 (Johnston)_NBR_.,pprove.doa