20171164 Ver 1_SW Plan_20170911

(Version 2.07; Released October 2016)33803.1.2TIP No.:B-4628County(ies):Rowan Page 1 of 2TIP Number:Date:Phone:Phone:Email:Email:County(ies):CAMA County?NoDesign/Future:Year:2014Existing:Year:Aquatic T&E Species?NoComments:YesNoNoWetlands within Project Limits?High Quality Waters (HQW)NoneSupplemental Classification: Forest, agriculture and light residential developmentBack Creek12-108-21-1-(0.5)0.30.1 miProject DescriptionProposed ProjectYadkin-Pee DeeRiver Basin(s): City/Town:0.5Typical Cross Section Description: Surrounding Land Use: General Project Narrative:(Description of Minimization of Water Quality Impacts)[e-mail]:8/31/2017RowanMount UllaMatthew Jones, PEWinston Salem, NC 27127WBS Element:Bridge ReplacementWBS Element:Charles Heafner, PE, CFMNCDOT Contact:336-747-78001001 Morehead Square Drive, Suite 610Charlotte, NC 28203Contractor / Designer:704-342-5409WSPNorth Carolina Department of TransportationHighway Stormwater Program STORMWATER MANAGEMENT PLAN FOR NCDOT PROJECTSProject Type:375 Silas Creek ParkwayAddress:General Project InformationB-462833803.1.2Impairments:Other Stream Classification: Primary Classification: Project Built-Upon Area (ac.)The project B-4628 consists of constructing a new bridge, 100' long, to replace the existing bridge #006 in Rowan County, on SR 1759 over Back Creek. Runoff from the bridge deck drains to the north approach where it is captured inlets and discharged to a rip rap pad.This project creates surface water impacts by adding bank stabilization to Back Creek. Impacts have been minimized by avoiding the use of deck drains, promoting sheet flow and inflitration with grassed shoulders, and providing rip rap bank stabilization where ditches tie into the stream. The removal of existing road fill under the bridge will improve conveyance and reduce velocities in the bridge opening. N/ABuffer Rules in Effect:N/ANone1402-10' lanes w/ 3' grass shouldersWaterbody Information2014NCDWR Stream Index No.:NRTR Stream ID:Annual Avg Daily Traffic (veh/hr/day):Existing SiteProject Length (lin. miles or feet): ac.Surface Water Body (1): Water Supply II (WS-II)NCDWR Surface Water Classification for Water Bodyac.2-9' lanes w/ 8' grass [e-mail] Includes Bridge Spanning Water Body? Deck Drains Discharge Over Buffer? Dissipator Pads Provided in Buffer?N/ADeck Drains Discharge Over Water Body?(If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the General Project Narrative)(If yes, provide justification in the General Project Narrative)
(Version 2.07; Released October 2016)TIP No.:B-4628County(ies):Rowan Page 2of2Sheet No.Station & Coordinates (Road and Non Road Projects)Surface Water BodyRiprap TypeDrainage Area(ac)Conveyance Structure-L- 16+32 Rt.-L- 14+95 Lt* Refer to the NCDOT Best Management Practices Toolbox (2014), NCDOT Standards, the Federal Highway Administration (FHWA) Hydraulic Engineering Circular No. 14 (HEC-14), Third Edition, Hydraulic Design of Energy Dissipators for Culverts and Channels (July 2006), as applicable, for design guidance and criteria.STORMWATER MANAGEMENT PLANFOR NCDOT PROJECTSBMP Associated w/ Buffer Rules?Pipe0.1Class 'B'Q10(cfs)Pipe/Structure Dimensions(in)0.5 N/A15V10(fps)Energy Dissipator TypeRiprap Apron/PadRiprap Apron/Pad 0.6North Carolina Department of TransportationAdditional CommentsHighway Stormwater ProgramWBS Element:Class II4(1)Back Creek(1)Back Creek44.02.7 N/A1.6Ditch V DitchPreformed Scour Holes and Energy Dissipators