20061214 Ver 2_More Info Letter_20071105

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
November 5, 2007
DWQ Project # 06-1214, Ver. 2
Wake County
Mr. Tim Smith
100 Weston Estates Way
Cary, North Carolina 27513
Subject Property: Tract F of Woodcreek (formerly Wild Acres)
UT to Middle Creek [030403, 27-43-15-(1), C, NSW]
REQUEST FOR MORE INFORMATION: STORMWATER MANAGEMENT PLAN
Dear Mr. Smith:
On January 31, 2007, the Division of Water Quality (DWQ) issued a 401 Water Quality Certification and
Neuse River Basin Buffer Authorization to impact the following as described in your modified
application dated January 11, 2007 for the purpose of constructing the Woodcreek Residential
Subdivision:
• 0.49 acres of wetland (0.37 acres permanent impact, 0.12 acres temporary impact),
• 345 linear feet of perennial stream (255 linear feet permanent impact, 90 linear feet temporary
impact),
• 231 linear feet of intermittent stream (2091inear feet permanent impacts, 221inear feet temporary
impact),
• 43,348 square feet (ftz) of protected Zone 1 Neuse River basin riparian buffer, and
• 27,817 square feet (ft2) of protected Zone 2 Neuse River basin riparian buffer
In order to meet Condition 7 of the 401 Certification for this project, a stormwater management plan
pertinent to Tract F of Woodcreek Subdivision was received by the DWQ on November 1, 2007. The
DWQ has determined that your stormwater management plan was incomplete as discussed below. Please
provide the following additional items so that the DWQ may continue to review the stormwater
management plan associated with this project.
Additional Information Requested:
1. The drawdown rates for all three of the proposed BMPs appear to be faster than two days. Please
reevaluate the orifice sizes of these structures and provide orifice sizes that will draw down the
water quality volume in two to five days.
2. Please explain how maintenance access will be provided for BMP 3.
3. Please provide details for the Swale that drains BMP 3.
4. Please adjust the grading for BMP 3 so that side slopes do not exceed 3:1.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Internet: htty:~,h2o.enr.state.nc.us/ncwetlands.
No°e Carolina
~turally
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Tim Smith
Page 2 of 2
November 5, 2007
The DWQ will require the above additional information to finalize review of the stormwater management
plan for Tract F of Woodcreek Residential Subdivision. Please provide the following information so that
we may continue to review the stormwater management plan associate with this phase of your project.
You are welcome to contact me at 919-715-3425 if you have questions or would like to set up a meeting.
Sincerely,
~~~
Annette Lucas, Environmental Engineer III
AML/aml
cc: Nicole Thomson, S & EC, P.A., 11010 Raven Ridge Road, Raleigh, NC 29614
USACE Raleigh Regulatory Field Office
Mike Horan, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Filename: 061214v2 WoodcreekTractF(Wake)_Hold_S W