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Home My WebLink About20071665 Ver 1_More Info Received_20080114O~C ~~'~ ~FR Michael F. Easley, Governor ~ Q ~ G ~ ~ William G. Ross Jr., Secretary ~ 1 -- North Carolina Department of Environment and Natural Resources ~ ~ p ~ Coleen H. Sullins, Director Division of Water Quality December 19, 2007 DWQ Project # 07-1665 Johnston County CERTIFIED MAIL: RETURN RECEIPT REQUESTED Mr. James Lipscomb Carriage Creek LLC P.O. Box ]33 ~ 0 ~ ~~~J Clayton, NC 27528 Subject Properly: Carriage Creek Subdivision .IAN 1 ~ 2008 Steep Hill Branch [030403, 27-43-15-16, C, NSW] olnrak. +warF.k n~:AU>~r l~~lE?tAid95 qNZ ~;Tt}RMVlt4?Ek i3^.1f~riv REQUEST FOR MORE INFORMATION Dear Mr. Lipscomb: On October 1, 2007, the Division of Water Quality (DWQ) received your application dated September 27, 2007, to fill or otherwise impact 0.16 acres of 404/wetland, 1201inear feet of perennial stream, and 3,744 square feet of Zone 1 Neuse River basin protected riparian buffers and 3,266 square feet of Zone 2 Neuse River basin protected riparian buffers to construct a residential subdivision. On November 14, 2007, the DWQ received additional information from you, however, the DWQ has determined that your application remains 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 properly. Therefore, unless we receive five copies of the additional information requested below, we will have to move toward denial of your application as required by 15A NCAC 2H .0506 and will place this project on hold as incomplete until we receive this additional information. Please provide the following information so that we may continue to review your project. Additional Information Requested: Please provide appropriate diffuse flow measures for the Neuse Buffer crossing per Chapter 8 of the NC Division of Water Quality Stormwater Best Management Practices Manual. If level spreaders are proposed to meet the diffuse flow requirement, then please provide one completed Level Spreader Supplement Form for each proposed level spreader (make sure to include the Required Items Checklist with all required items attached.) The BMP Manual and Level Spreader Supplement Form are available at: http://h2o.enr.state.nc.us/su/bmQ forms.htm. 2. If the site is not appropriate for level spreaders, please provide an alternative BMP that removes a minimum of 30 percent of total nitrogen. Please design the BMP per the requirements of the BMP Manual and provide a BMP Supplement Form for each proposed BMP. See the web site above for the BMP Manual and the BMP Supplement Forms. 3. Please show how Stormwater in from the road will be conveyed to the wetlands conservation area on the south side of the project at the site of the crossing. Please show that flows entering the wetlands will be nonerosive (less than 2 feet per second) during the 10-year storm. 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 naus/ncwetlands Nose Carolina ~tura!!y An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper Carriage Creek, LLC Page 2 of 2 December 19, 2007 Please submit this information within 30 calendar days of the date of this letter. If we do not receive this requested information within 30 calendar days of the date of this letter, your project will be withdrawn and you will need to reapply with a new application and a new fee. 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. Cyndi Karoly or Mr. Ian McMillan at 919-733- 1786 if you have any questions regarding or would like to set up a meeting to disquss this matter. Cyndi Karoly, Supervisor 401 Oversight/Express Review Permitting Unit CBKlijm cc: Lauren Witherspoon, DWQ Raleigh Regional Office USACE Raleigh Regulatory Field Office File Copy Central Files Neal Floyd, True Line Soils, 205 W. Main Street, Clayton, NC 27520 Filename: 0'71665 CarriageCree kSD(Jo hnston)On_Hold2 OF W/+TF9 ~~~ > ~ ~O~ y NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part ll!) must be printed, filled out and submitted along with all of the required information. .. For Level Spreaders Receiving Flow From a BMP Type of BMP ~@ Ptt'l~yT ~itl pct ~ -5`ib~7~ 1tlett' Drawdown flow from the BMP ~ , r,!/ cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area *Cp ~G Impervious surface area {~ Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm cfs Time of concentration min Rainfall intensity, 10-yr storm in/hr Peak flow from the 10-yr storm cfs Where Does the Level Spreader Discharge? To a bioretention cell? (Y or N) To a wetland? ~ (Y or N) To a filter strip or riparian buffer? (Y or N) Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass ff Width of dense ground cover g Width of wooded vegetation g Total width ff Slope (from level lip to to top of bank) Are any draws present? (Y or N) Level Spreader Design Forebay surface area N/~ sq ff Feet of level lip needed per cfs /~ fUcfs Answer °Y° to one of the fallowing: Length based on the 1 in/hr storm? ~ (Y or N) Length based on the 10-yr, 24-hr storm? _ (Y or N) Length based on the BMP discharge rate? (Y or N) Design flow Vie, c,~/ cfs Is a bypass device provided? ~~,/ (Y or N) Length of the level lip ~ff Are level spreaders in series? ~_ (Y or N) if Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2 ware ~ Jb(~8 Drainage area number `-' r o~o~ W AT e9Qy ~~~ ~ ~ NCDENR p STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part lll) must be printed, filled out and submitted along with all of the required information. Project name Contact name Phone number Date Drainage area number ~_ ~, _ e ll~.~=DESf ~ ~ ~ - _- -_ ~.. _--. .._ . . ~. .~. .r .. ,. .a . ~.., ... a ti- .. - _ - - - _ _ ' ins ~i^ ~`„L, For Level Spreaders Receiving Flow From a BMP Type of BMP Vtt"t~t~tT ttl Est 13~TOr.1 ~ 1[1Ctf Drawdown flow from the BMP ~' RcL cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area /• Impervious surface area ftz Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm cfs Time of concentration min Rainfall intensity, l0-yr storm in/hr Peak flow from the 10-yr storm cfs Where Does the Level Spreader Discharge? To a bioretention cell? (Y or N) To a wetland? (Y or N) To a filter strip or riparian buffer? ~( (Y or N) Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass ft Width of dense ground cover ft Width of wooded vegetation ~~ ft Total width ft Slope (from level lip to to top of bank) Are any draws present? (Y or N) Level Spreader Design Forebay surface area ,~ ~i'F sq ft Feet of level lip needed per cfs / ~ fticfs Answer "Y' to one of the following: Length based on the 1 inihr storm? (Y or N) Length based on the 10-yr, 24-hr storm? Y (Y or N) Length based on the BMP discharge rate? ~ (Y or N) Design flow cfs Is a bypass device provided? __ /(/ (Y or N) Length of the level lip ~~j ft Are level spreaders in series? ~~~ (Y or N) Form SW401-level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2 ~~ NCDEWR Ct~[((QF W A 7F9QG ~ I I_JWLJI r P ~ STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with ail of the required information. C P60JECTICJF.OR Project name Contact name Phone number Date Drainage area number ._rt`rc.riw^^:~. `.[cclc. iJ1.tPLrVI~LON"' TY~`~G 1 St 4 'ice - oZZ ~8Z ~ For Level Spreaders Receiving Flow From a BMP Type of BMP "` ~ ptf l~LT ~t!Li. pct- ~'~-io~etf Drawdown flow from the BMP Q~-cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area ~. $b .f~G. Impervious surface area ~ Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm cfs Time of concentration min Rainfall intensity, l0-yr storm in/hr Peah flow from the 10-yr storm cfs Where Does the Level Spreader Discharge? To a bioretention cell? (Y or N) To a wetland? _~ (Y or N) To a filter strip or riparian buffer? (Y or N) Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass ff Width of dense ground cover ft Width of wooded vegetation ft Total width ft Slope (from level lip to to top of bank) ~ % Are any draws present? (Y or N) Level Spreader Design Forebay surface area ,(/~q sq ft Feet of level lip needed per cfs ~,+f ft/cfs Answer "Y" to one of the following: Length based on the 1 in/hr storm? (Y or N) Length based on fhe 10-yr, 24-hr storm? ~-(Y or N) Length based on the BMP discharge rate? (Y or N) Design flow B. 9 cfs Is a bypass device provided? _~_ (Y or N) Length of the level lip ~ y ft (/~ ZD Are level spreaders in series? V _ _~ (Y or N) ~% Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2 of wArF9 ~~~ 02 OG ~ ~ ..r.. > y NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111J must be printed, filled out and submitted along with all of the required information. Project name Contact name Phone number Date Drainage area number oZL - .;~; ~ .. s_ -{~ ._` For Level Spreaders Receiving Flow From a BMP Type of BMP ~ pu"l~l'f ~tti- w 1.53aatt` ticlerf Drawdown flow from the BMP /,G G cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area 6. 88 ~Y~lG Impervious surface area ~ Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm cfs Time of concentration min Rainfall intensity, 10-yr storm inlhr Peak flow from the 10-yr storm cfs Where Does the Level Spreader Discharge? To a bioretention cell? (Y or N) To a wetland? (Y or N) To a filter strip or riparian buffer? ~ (Y or N) Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass ff Width of dense ground cover ft Width of wooded vegetation ~~ft Total width ff Slope (from level lip to to top of bank) ~% Are any draws present? (Y or N) Level Spreader Design Forebay surface area ~ sq ft Feet of level lip needed per cfs /~_ft/cfs Answer °Y° to one of the following: Length based on the 1 in/hr storm? (Y or N) Length based on the 10-yr, 24-hr storm? _~_ (Y or N) Length based on the BMP discharge rate? (Y or N) Design flow ~GGG cfs 1 Is a bypass device provided? _ ~_(Y or N) Length of the level lip ~~ (~ ft u3C 2L Are level spreaders in series? /I,J (Y or N) Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2 Added Designs ~I~u -:,-,,. ~:~. n BMP Manual Figure S-Z adapted from Hathaway 2006