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Home My WebLink About20110661 Ver 1_More Info Letter_20120301 �� HWENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Charles Wakild P E Dee Freeman Governor Director Secretary March 1, 2012 DWQ Project#2011 0661 Wake County CERTIFIED MAIL RETURN RECEIPT REQUESTED Omega Association Management Attn Mr George Sewell 1010 Buck Jones Road Raleigh NC 27606 Subject Property Chastain II,Raleigh,NC UT to Crabtree Creek [030402 27 33 (10) C NSW] REQUEST FOR MORE INFORMATION Dear Mr Sewell On July 14 2011 the Division of Water Quality(DWQ)received your application dated June 30 2011 with additional information received by DWQ on September 30 2011 and February 2 2012 to impact 600 square feet(ft)of Zone 1 protected riparian buffers and 1 000 square feet(ft)of Zone 2 protected riparian buffers to construct the proposed plunge pool and stabilization measures at the subject property 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 wetlands and/or streams on the subject property Therefore unless we receive five copies of the additional information requested below we will place this project on hold as incomplete until we receive this additional information If we do not receive the requested information your project will be formally returned as incomplete Please provide the following information so that we may continue to review your project Additional Information Requested 1 The scour hole appears to be significantly undersized for the peak flows that will be directed to it The length of level spreader needed to handle the estimated 10 year peak flow that you have estimated is over 1200 feet This capacity is not likely to be replaced by a grassed scour hole equipped with a rock dam that is only 10 feet in length The DWQ strongly recommends providing a bypass system for larger storms and designing a scour hole that is appropriately sized and tined for the one inch/hour storm Please re design and provide calculations for the maximum velocity that will be discharged from the scour hole 2 It appears that your calculations have underestimated both the percentage of impervious surface in the drainage area and the C value Please re visit these numbers before you address item (1) above 3 One(1)data CD of frill 'We olanc in TIFF Group 4 format(black and white not grayscale or color) If the plans are too large to store in TIFF format they can be stored in PDF format tVetlands Buffers otormwater Compliance and Permitting Una(WeBSCaPe) One t000 t lad Service Center Raleigh North Carolina 27699 1650 NorthCarohna i none U1Q 807 o30n FAX 019 807 NI ��'/��nternet http iportal ncdenr orglweb wq'ws�ws K An Equal noporlunity i Affirmative Action Employer Sewell Page 2 of 2 March 1 2012 Please respond in writing within 30 calendar days of the date of this letter by sending a copy of this information to me If you will not be able to provide the requested information within that timeframe please provide written confirmation that you intend to provide the requested information and include a specific timetable delineating when the requested materials will be provided If we do not hear from you in 30 calendar days we will assume that you no longer want to pursue this project and we will consider the project as returned This letter only addresses the application review and does not authorize any impacts to wetlands waters or protected buffers Please be aware that any impacts requested within your application are not authorized (at this time)by the DWQ Please call Ms Annette Lucas at(919) 807 6381 Ms Amy Chapman at(919) 807 6400 or Ms Karen Higgins at 919 807 6360 if you have any questions regarding or would like to set up a meeting to discuss this matter Sincerely Karen Higgins Supervisor Wetlands Buffers Stormwater Compliance and Permitting Unit KAH/asc cc Lauren Witherspoon DWQ Raleigh Regional Office Jones&Cnossen Engineering PLLC Attn Mr Peter Cnossen PO Box 1062 Apex NC 27502 File Copy Filename 110661Chastamll(Wake)NBR_On_Hold3 f } COMPLETE •N COMPLETE THIS SECTION ■ Complete Items 1 2 and 3 Also complete A SiqpftPre Item 4 if Restricted Delivery is desired ❑Agent ■ Print your name and address on the reverse X ❑Addresse( so that we can return the card to you B �ted N e) C to of Dellve■ Attach this card to the back of the mallplece �_i—��or on the front If space permits 1 Article Addressed to D Is delivery addresd different from Item 17 ❑Yes If YES enter delivery address below ❑No OMEGA ASSOC MANAGEMENT GEORGE SEWELL 3/2/12 1 1010 BUCK JONES RD RALEIGH NC 27606 3 ServlceType DWQ 11 0661 WAKE COUNTY )SICertifiedMail ❑Express Mail ❑Registered )S Retum Receipt for Merchandise ❑Insured Mail ❑C O D 4 Restricted Delivery?(Extra Fee) ❑Yes 2 Article Number, „ o ,fit^ 7009 2250 0000 8087 2945 { (Transfer from service labeq PS Form 3811 February 2004 Domestic Return Receipt 102595-02 M 154 UNITED STATES POSTAUSMMM I Pb( ss M II j4ppqA� , aid w it t7, =ti} o G 0'0 • Sender Please print your name address and ZIP+4 in this box • DENR DWQ WeBSCaPe UNIT WETLANDS STORMWATER BRANCH 1650 MAIL SERVICE CENTER FL 9 RALEIGH NC 27699 1650