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HomeMy WebLinkAbout20061214 Ver 2_More Info Letter_20071105Michael 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: 919-733-1786 /FAX 919-733-6893 / Internet: htty:~,h2o.enr.state.nc.us/ncwetlands. No°e Carolina ~turally An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper 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