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Home My WebLink About20060659 Ver 3_More Info Received_20120307WIT F. R 6 & RAVE: 1Z L TRANSMITTAL 100 MacKenan Drive Cary NC 27511 Phone (919) 469 3340 Fax (919) 467 6008 To Karen Higgins Date Company DWQ Central Office Proms Address 1650 Mad Service Center W &R# Raleigh NC 27699 1650 Re 03/06/12 Woods at Umstead 050018 Additional Information DWQ Project #06 -0659 v 3 FOR YOUR ❑ Approval ❑ Use ❑ Information 0 Review & Comment ❑ Record ❑ Distnbution WE TRANSMIT THE FOLLOWING COPIES DATE I DESCRIPTION 3 01/12/12 1 Level Spreader — Vegetated Filter Strip Supplemental Form REMARKS Enclosed please find the additional information requested 2 IR 0W[2 p MAR 7 2012 DENR WATER QUALITY VM7 ANDS AND STORMWATER BRANCH Should you have any questions on the addressing please contact me at Tel #919 535 5142 or via cduerr(aD-withersravenel com Thanks) Craig SIGNED Craig M Duerr, PE C®ER North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdu- Charles Waklld PE Dee Freeman Governor Director Secretary March 5 2012 DWQ Project # 06 0659 v 3 Wake County CERTIFIED MAIL 7010 1370 0001 3307 2596 RETURN RECEIPT REQUESTED Trenton Ro id LLC Attn Ju'ian Rawls 100 Weston Estates Wav Cary INC 27) 13 Subject Property Woods at,Gmstead Richlands Creek [030402 27 33 11 C NSW] REQUEST FOR MORE INFORMATION Dear Mi Rawls On Febrtiary 2 2012 the Division of Water Quality (DWQ) ieceived your application dated January 31 2012 to fill or otherA ise impact 30 linear feet of perennial stream channel (permanent impacts) 60 linear feet of perennial stream channel (temporary impacts) 10 411 square feet of Zone I Neuse River basin protected riparian buffer and 6 611 square feet of Zone 2 Neuse River basin protected riparian buffer (permanent impacts) for a residential subdivision The DWQ has determined that your application was incomplete and /or provided inaccurate information as discussed below The DWQ will require additional information in order to process your application to impact protected streams and buffers on the subject property This project is on hold and incomplete until we receive the additional information requested below If we do not receive the requested information your project will be formally returned as incomplete Please prop ide the following information so that we may continue to review )our ptolLCt Additional Information Requested 1 Ple-ise provide a I t,vel Spreader VC,,Ltated Filter Strip (LS VFS) Supplement Form for the proposed LS VFS as %v( 11 is all of the tequn -d items Fhe LS VFS Supplement Fotm is available on the DWQ WLb site it http floortal IlLdenr orf-/wcb,vvq/WS /SU /bmp manual Please submit thice copies of this information vvithm )0 calendar days of the date of this letter Please send additional information to DWQ Central Office Attn Karen Higgins, 1650 Mail Service Center, Raleigh, NC 27699 16,-)0 It we do not ieceive this tequi -sted information within j0 calendar days of the date of this lett(,r kow project will be withdrawn Ind )ou will need to reapply with a new application and a new fee If you North Carol a D Sion of Water Qi a 'y Ra a gh R g onai Ofrce 1 t rn t nvw c 4a a qual ty org 628 bra I Service Center NorthCarolina ,/v1014alll/ Surface Wa r Protection Phone (919) 791 4200 Cus omer Sery ce Raleigh NC 27699 1628 FAX (919) 788 7159 877 6236748 An Equa Oppo tun ty /Arf mahve Action Employer — 50 / Recycled /10 / Post Consumer Paper Pa,e 2 need additional time to compile the inform ition requested above please email Lauren Witherspoon (lauren witherspoongncdent gov) iequesting an extension and indicate a new date for submittal This lettet only iddiesses the -ipplication review Ind does not authorize any impacts to wetlands wlters or protected buffers Please be aware that any impacts requested within your application are not authorized (It this time) by the DWQ Please call Annette Lucas 'it 919 807 6381 if you have any questions tegarding this letter or would I ke to set up a meeting to discuss this matter t incei ly a /;,, �, d Danny Smit Raleigh Regional Office Supervisor Surface Water Protection Section cc D%VQ Raleigh Re ,,tonal Office File Copy WeBSCaPe — 1650 Mail Service Center f'ioy Beaslev — Withers and Ravenel 1410 Commonwealth Drive Suite 101 Wilmington NC 28403 Filename 06 0659 v 3—Woods at Umstead 401 NBR On Hold �TA of w�rFA y NCDENR Y STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER VEGETATED FILTER STRIP (LS VFS) SUPPLEMENT This form must be completely filled ou4 printed Initialed and submitted I PROJECT INFORMATION Protect name The Woods at Umstead Contact name Hunter Freeman Phone number 919469.3340 Date January 12 2012 Drainage area number 1 II DESIONdNFORMATION 02 CIS The purpose of the LS-VFS Buffer Rule Diffuse Flow Stormwater enters LS-VFS from A BMP Type of VFS Engineered filter strip (graded & sodded slope < 8%) Explanation of any Other' responses above It Stormwater Enters the LS-VFS from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Time of concentration Ramfall intensity 10•yr storm Peak flow from the 10•yr storm Design storm Maximum amount of flow directed to the LS VFS Is a flow bypass system going to be used? f? I? q cis nun m/hr cis Do not complete this section of the form Do not complete this section of the forth Do not complete this section of the forth Do not complete this section of the form Do not complete this section of the form Do not complete this section of the forth Do not complete this section of the form Do not complete this section of the form cis Do not complete this section of the form (Y or N) Do not complete this section of the form lit 1111, 4 ES /0�9'L,9i� ti 028942 NFL' � I 1 RFC`` ,fit �Z Explanation of any Other responses above If Stormwater Enters the LS VFS from a BMP Type of BMP Other Explained below Peak discharge from the BMP during the design storm 02 cis Peak discharge from the BMP during the 10-year storm 02 cis Maiumum capacity of a 100 -foot long LS VFS 10 cis Peak flow directed to the LS-VFS 02 CIS Is a flow bypass system going to be used? Y (Y or N) Explanation of any 'Other" responses above Dry Detention & Splilter Box LS-VFS Design Forebay surface area 0 sq It No for G ebay is required Depth of forebay at stormwater entry point 0 in N Pq Depth of frebay at stormurater ewI point 0 m Too shallow cp 9 Feet of level hp needed per cis 10 WCfs Computed minimum length of the level lip needed 2 it Ten feet Is the minimum level spreader length Length of level hp provided 10 ft ►- N A � O Form SW401 LS-VFS 27Ju12011 Revs raeklkof 3 i s 3 1 1 I i t i I r Width of VFS Elevation at downslope base of level 6p Elevation at the end of the VFS that is farthest from the LS Slope (from level Up to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the and of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below) M W y (flow depth for 10 -year storm) freeboard (during the layear storm) Peak velocity In the channel during the 10-yr storm Channel Uning material Does the bypass discharge through a wafland? Does the channel enter the stream At an angle? Explanation of any 'Other' responses above 30 34100 tmsl 34000 fmsl 333 °Y N (Y or N) OK N (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow sphtter & supporting caics. 300 it 000 it 1200 it 065 it 1.35 it 469 fVsec Pick one e_t_ l N (Y or N) Y (Y or N) ll III REQUIRED ITEMS CHECKLIST I EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found An incomplete submittal package will result In a request for additional Information This will delay final review and approval of the pro)ecL Initial In the space provided to indicate the following design requirements have been met If the applicant has designated an agent the agent may initial below M a requirement has not been met attach justification Requried item 1 Plans (1 50 or larger) of the entire site showing Design at ultimate budd -out. Off-sb drainage (t applicable) Delineated drainage basins (include Rational C coefficient per basin) Fombay (if applicable) fth flow bypass system Maintenance access, Proposed drainage easement and public right of way (ROW) and Boundaries of drainage easement. InId gage or plan sheet number and any notes Form SW401 LS-VFS 27JU12011 Rev 9 page 2 of 3 Plan details (1 = MY or larger) for the level spreader showing Foamy (i applicable) High flow bypass system One foot topo Ines between the Frei rip and top of stream bank, Proposed drainage easement, and Design at ultimate bui"t. Section view of the level spreader (1 = 2(r or larger) showing Underdrain system Of applicable) Level rip Upslope channel and Downslope filter fabric. 4 Plan details of the flow splitting device and supporbng calculations (d applicable) 5 A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized 6 If a non- englneered VFS is bemg used then prawde a photograph of the VFS showmg that no draws are present 7 The supporting calculations 8 A copy of the signed and notarized operation and maintenance (O&M agreement Form SW401 LS-VFS MuM I Rev 9 pop 3 of 3