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Home My WebLink About20171047 Ver 1_SW Plan_20170818Hi�hWay North Carolina Department of Transportation /�N�— � Stormw�ater �" e ,,,,,�„�,,, Highway Stormwater Program \�� STORMWATER MANAGEMENT PLAN �`"�� (Version 2.07; Released October 2016) FOR NCDOT PROJECTS WBS Element: 45573.1.1 TIP No.: B-5618 County(ies): Beaufort Page 1 of 3 General Project Information WBS Element: 45573.1.1 TIP Number: B-5618 Project Type: Brid e Replacement Date: 7/7/2017 NCDOT Contact: Robert T. Turnbull, Environmental Services, Inc. Contractor / Designer: HNTB North Carolina, P.C. / James A. Byrd, PE Address: 4901 Trademark Dr. Address: 343 E. Six Forks Road Raleigh, NC 27610 Suite 200 Ralei h, NC 27609 Phone: 919 212-1760 Phone: 919 424-0437 Email: rturnbullCa�esinc.cc Email: 'ab rd@hntb.com Cit /Town: Aurora Count (ies : Beaufort River Basin(s): Tar-Pamlico CAMA Count ? Yes Wetlands within Project Limits? Yes Pro'ect Descri tion Pro'ect Len th lin. miles or feet : 0.10 Surroundin Land Use: Rural Residential and Agriculture Pro osed Pro'ect Existin Site Pro'ect Built-U on Area ac. 0.4 ac. 0.3 ac. Typical Cross Section Description: 2- 11' asphalt paved lanes with 2' paved shoulders, 4' grass shoulders. Impacted ditch in 2- 10' asphalt paved lanes with grass shoulders, 1:1 of flater grass lined ditches in northwest, southwest, and southeast quadrants are replaced with 3:1 front and back northwest, southwest and southeast quadrants. Wetlands are present in southeast slopes and tie to existing ditch prior to Durham Creek. Impacted ditch in southwest and northeast quadrants. quadrant is replaced with typical ditch with 4:1 front slope and 3:1 back slope. Annual Avg Daily Traffic (veh/hr/day): Desi n/Future: 480 Year: 2032 Existin : 240 Year: 2012 General Project Narrative: State project B-5618 involves the replacement of Beaufort County Bridge #060315 on SR 1973 (Main Street) over Durham Creek. The existing bridge consists of 1@ 19' - 0", 1 (Description of Minimization of Water @ 16' - 3", 1@ 18' - 8", 1@ 16'- 1", 1@ 17' - 0", 1@ 17'- 7", 1@ 17' - 5" and 1@ 18' - 7" timber floor on continuous I-beams. It is to be replaced with a 1@ 45' - 0", 1@ 50' - Quality Impacts) 0" and 1@ 45' - 0", 21" cored slab (140' total length, 33' totoal width) at the same location. In accorance with Tar-Pamlico River Buffer Regulations, the propsoed bridge does not contain deck drains. All stormwater from the bridge and approches will be collected by a storm drainage system and discharged into the wetlands. The drainage system will outlet outside of the buffer limits in the northeast quadrant at -L- station 15+84 LT with the outlet pipe set at 0.3 % to reduce velocity into the wetlands. Waterbod Information Surface Water Body (1): Durham Creek NCDWR Stream Index No.: 29-21-(1) NCDWR Surface Water Classification for Water Body Primary Classification: Class C Su iemental Classification: Nutrient Sensitive Waters (NSW) Other Stream Ciassification: Impairments: A uatic T&E S ecies? Comments: NRTR Stream ID: Buffer Rules in Effect: Tar-Pamlico Project Includes Brid e S anning Water Bod ? Yes Deck Drains Dischar e Over Buffer? No Dissi ator Pads Provided in Buffer? N/A Deck Drains Discharge Over Water Body? No (If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the (If yes, provide justification in the General Project Narrative) General Project Narrative) Hl hW� North Carolina Department of Transportation rs"� �Stormwater ' "�,=1 ,,,,,.,�.,, Highway Stormwater Program - STORMWATER MANAGEMENT PLAN — (Version 2.07; Released October 2016) FOR NCDOT PROJECTS WBS Element: 45573.1.1 TIP No.: B-5618 Count (ies): Beaufort Pa e 2 of 3 Swales Station & Coordinates Surface Base Front Back Drainage Recommended Actual Longitudinal Rock BMP Sheet (Road and Non Road Water Width Slope Slope Area Treatm't Length Length Slope Q2 V2 Q10 V10 Checks Associated w/ No. Pro'ects Bod it H:1 H:1 ac ft ft %) cfs (fps) (cfs f s Used Buffer Rules? 4 13+50 LT (1)Durham 0.0 3.0 3.0 1.1 110 800 10.78% 2.0 2.6 2.7 2.8 No No 35.323850/-76.874062 Creek 4 13+50 RT (1)Durham 0.0 4.0 3.0 0.3 30 320 2.12% 0.6 1.5 0.8 1.6 No No 35.323778/-76.874113 Creek 4 16+07RT (1)Durham 0.0 3.0 3.0 0.1 12 220 2.80% 0.2 1.2 0.2 1.3 No No 35.323546/-76.873611 Creek Additional Comments /�°-\ Hi�ilwdy North Carolina Department of Transportation \ StOYmwater Highway Stormwater Program ��j �: STORMWATER MANAGEMENT P�AN — V� (Version 2.07; Released October 2016) FOR NCDOT PROJECTS WBS Element: TIP No.: B-5618 County ies): Beaufort Pa e 3 of 3 Preformed Scour Holes and Energy Dissipators Station & Coordinates Drainage Pipe/Structure BMP Sheet (Road and Non Road Surface Energy Dissipator Area Conveyance Dimensions Q10 V10 Associated w/ No. Pro'ects) Water Bod Type Ri ra T e (ac) Structure (in) (cfs) (f s) Buffer Rules? 4 -L- Sta. 15+82 LT (1)Durham Riprap Energy Class'B' 0.2 Pipe 15 0.5 1.3 N/A 35.323630 / -76.873570 Creek Dissipator Basin Additional Comments ' 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.