Loading...
HomeMy WebLinkAbout20050732 Ver 07_More Info Letter_20071031~_ WATF9 P ~'~ r ~~ - `C 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 October3l, 2007 NNP-Briar Chapel, LLC Attn: Mr. Mitch Barron, Vice President Newland Communities 5850 Fayetteville Road, Suite 201 Durham, NC 27713 Subject Property: Briar Chapel Community, Phase 1 DWQ Project #EXP OS-0732v7 Chatham County APPROVAL OF MODIFICATION OF STORM WATER MANAGEMENT PLAN Dear Mr. Barron: The Division of Water Quality (DWQ) has reviewed the October 29, 2007 Modification Request to the Storm Water Management Plans approved by DWQ on August 7, 2006 (EXP OS-0732v2), August 21, 2006 (EXP OS- 0732v3), August 29, 2006 (EXP OS-0732v4), and December 8, 2006 (EXP OS-0732v5). The proposed modifications to the six (6) Wet Ponds became necessary due to site layout changes and subsequent revisions to the total impervious area to each wet pond as stipulated in the application documents submitted by your engineer, Mr. Jeremy Finch, P.E. of John McAdams Company, Inc. Having submitted all requested items and supporting information including one original and two copies of revised site layout and construction plans, revised impervious area calculations, revised BMP supplements and corresponding operation and maintenance agreements for all BMPs, the DWQ understands that the requested modifications will not result in the compromise of stormwater treatment requirements associated with this project. Therefore, DWQ will approve of these modifications to the six wet ponds in Phase 1. This Modified Stormwater Management Plan will satisfy phase 1 stormwater conditions required by the Individual Water Quality Certification issued on May 9, 2006. This approval is subject to the following conditions and provisions: The stormwater treatment system, which includes six wet detention ponds, preformed scour holes, and forested filter strips, as approved by this Office, and the drainage patterns depicted on the plan sheets, must be maintained in perpetuity. No changes to the structural stormwater practices shall be made without written authorization from the Division of Water Quality. The stormwater easements shall allow for the ability to maintain the structures, perform corrective actions, and shall provide protection of the structures from potential alternations by future property owners. 2. The approval of the proposed stormwater management plan for the low density area (i.e. less than 30% impervious area) is hereby incorporated. The storm drainage system for this area shall consist of curb/gutter-grassed ditches-preformed scour hole/level spreader system to provide diffuse flow prior to entering stream buffers as proposed. Any struptur~/facility/amenity that will increase the percent impervious of this area shall not be constructed without prior approval of the stormwater treatment system from DWQ. 3. Stormwater treatment systems for future phase development shall be in accordance with the most current version of the NCDENR Stormwater Best Management Practices Manual at the time of the development. 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: httn~//h2o enr state nc us/ncwetlands Nose hCarolina ~atura!!r~ n., n,.....i n ............:«..~nrc....,,,.«:..,, n,,.:,.., o..,..i,....,_ cnoi n...,..,.~,.aiinoi n,.... r...,.,........_n....,._ Briar Chapel Phase 1 Stormwater Modification Page 2 of 2 October 31, 2007 4. You must submit three (3) copies of an executed Declaration of Covenants and Restrictions-Riparian Areas document within thirty (30) days of recording with the Register of Deeds, Chatham County, North Carolina. 5. The applicant and/or authorized agent shall contact the DWQ Express Review Program in writing at the letterhead address within ten (10) days of the commencement of construction. ,; , This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please contact Joseph Gyamfi at 919-715-3473 or Lia Myott at 919-733-9502. c CBK/jg ~yndi Karoly, Supervisor 401 Oversight/Express Review Program cc: USACE Raleigh Regulatory Field Office DWQ Raleigh Regional Office File Copy Central Files Kevin Yates, John R. McAdams Co., Inc.; 2905 Meridian Pkwy., Durham, NC 27713