20171170 Ver 1_SW Plan_20171025

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STORMWATER MANAGEMENT PLAN --
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 45575.1.1 TIP No.: B-5620 County(ies): Beaufort Page 1 of 2
General Project Information
WBS Element: 45575.1.1 TIP Number: B-5620 Project T pe: Brid e Replacement Date: 10/25/2017
NCDOT Contact: Robert T. Turnbull, Environmental Services, Inc. Contractor / Desi ner: HNTB North Carolina, P.C. / James A. B rd, PE
Address: 4901 Trademark Dr. Address: 343 E. Six Forks Road
Raleigh, NC 27610 Suite 200
Ralei h, NC 27609
Phone: [phone] Phone: [phone]
Email: rturnbull esinc.cc Email: 'ab rd hntb.com
Cit ITown: Aurora Count ies : Beaufort
River Basin s: Tar-Pamlico CAMA Count ? Yes
Wetlands within Project Limits? Yes
Pro'ect Description
Pro'ect Len th lin. miles or feet : 0.18 Surroundin Land Use: Rural Residential and Agriculture
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.6 ac. 0.5 ac.
Typical Cross Section Description: 2- 11' asphalt paved lanes with 2' paved shoulders, 3' grass shoulders. 2- 9' asphalt paved lanes with grass shoulders. Wetlands and tributaries to Campbell
Creek are present in all four quadrants. CAMA wetlands are distinguished from 404
wetlands.
Annual Avg Daily Traffic (veh/hr/day): Desi n/Future: 480 Year: 2033 Existin : 240 Year: 2013
General Project Narrative: State project B-5620 involves the replacement of Beaufort County Bridge #060030 on NC 33 over Campbell Creek. The existing bridge consists of 1@ 25' - 6", 1@ 24' - 11", 1
(Description of Minimization of Water @ 25' - 1", and 1@ 25'- 5" reinforced concrete floor and continuous I-beams on reinforced concrete caps and timber piles. It is to be replaced with a 1@ 45' - 0", 1@ 50' - 0"
Quality Impacts) and 1@ 45' - 0", 21" cored slab (140' total length, 33' total width) 13' downstream of the existing crossing.
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 west quadrant at -L- station 16+75 RT with the outlet
pipe set at 0.3% to reduce velocity into the wetlands. No rip rap pad was specified at the outlet due to low velocity and agency's desire to minimize impacts.
Waterbody Information
Surface Water Body (1): Campbell Creek NCDWR Stream Index No.: 29-33-2-(2)
NCDWR Surface Water Classification for Water Body Primary Classification: Class SA
Supplemental Classification: High Quality Waters (HQW (NSW)
Other Stream Classification:
Impairments:
Aquatic T&E Species? Comments:
NRTR Stream ID: Buffer Rules in Effect: Tar-Pamlico
Project Includes Bridge Spanning Water Body? Yes Deck Drains Discharge Over Buffer? No Dissipator 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)

1-li�ll�vdy North Carolina Department of Transportation /
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STORMWATER MANAGEMENT PLAN —
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: TIP No.: 6-5620 Count ies : Beaufort Pa e 2 of 2
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 Riprap T pe ac Structure (in) (cfs) (fps) Buffer Rules?
4 -L- 16+44.78 RT (1)Campbell Riprap Energy Class'B' 0.1 Pipe 18 0.8 0.5 N/A
35.287275,-76.686840 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.