20180401 Ver 1_950015_HYD_SMPv2 07_(Oct 2016)_20180321

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STORMWATER MANAGEMENT PLAN �`" �^—=��
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.4.R.87 TIP No.: SF-950015 County(ies): Wayne Page 1 of 2
General Project Information
WBS Element: 17BP.4.R.87 TIP Number: SF-950015 Project Type: Bridge Replacement Date: 12/8/2017
NCDOT Contact: Chad Co ins Contractor / Designer: RK&K - Jonathan Whittington, PE
Address: 509 Ward Blvd. Address: g00 Ridgefield Drive
PO Box 3165 Suite 350
Wilson, 27895 Raleigh, NC 27609
Phone: [phone] Phone: [phone]
Email: tcco [e-mail] Email: [e-mail]
Cit ITown: La Gran e Count ies : Wa ne
River Basin(s): Neuse CAMA County? No
Wetlands within Project Limits? No
Pro'ect Description
Project Length (lin. miles or feet): 0.11 mi. Surrounding Land Use: Rural
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.3 ac. 0.3 ac.
Typical Cross Section Description: 2-lanes at 10' each with 5'-5' paved shoulders 2-lanes at 10' each with 3' unpaved shoulders
Annual Avg Daily Traffic (veh/hr/day): Design/Future: 200 Year: 2016 Existing: 200 Year: 2016
General Project Narrative: This project replaces existing bridge #950015: 1@17.2', 1@17.1', 1@17.0', 1@17.5' for an overall length of 68.8'. The existing bridge consists of a reinforced concrete floor on
(Description of Minimization of Water timberjoists, is 25.3' wide out-to-out. The proposed bridge will be a a 85' long bridge with a span arrangement of 1@30', 1@55' utilizing 21" cored slabs. The proposed bridge
Quality Impacts) will incorporate sloped abutments with 4' caps. No deck drains will be required. Runoff from the bridge will be captured and discharged into a rip rap pad at the toe of fill to
diffuse the flow outside Buffer Zone 2. There is a slight increase in the impervious area of the project, however, there is no significant increase in the discharge from the
roadway runoff. Per the field scoping meeting, bank stablilzation has been added on each side of the stream within the ROW limits.
Waterbody Information
Surface Water Body (1): West Bear Creek NCDWR Stream Index No.: 27-72-2
NCDWR Surface Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: Swamp Waters (Sw) (NSW)
Other Stream Classification: None
Impairments: None
Aquatic T&E Species? No Comments:
NRTR Stream ID: Buffer Rules in Effect: Neuse
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)

HighWcly North Carolina Department of Transportation / G
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STORMWATER MANAGEMENT PLAN ���"�"��
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.4.R.87 TIP No.: SF-950015 Count ies : Wayne Page 2 of 2
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 °/a cfs f s cfs f s Used Buffer Rules?
4 -L- 14+00 to 15+25 RT (1)West Bear 0.0 3.0 3.0 0.2 15 125 0.32°/ 0.5 0.9 0.7 0.9 No Yes
Creek
4 -L- 14+73 to 15+38 LT (1)West Bear 0.0 3.0 3.0 0.2 18 65 3.08°/ 0.4 1.9 0.6 2.0 No Yes
Creek
4 -L- 15+65 to 16+25 LT (1)West Bear 0.0 3.0 3.0 0.2 16 60 1.33°/ 0.6 1.5 0.7 1.6 No Yes
Creek
4 -L- 15+75 to 17+25 RT (1)West Bear 0.0 3.0 3.0 2.0 204 150 0.67°/ 5.1 2.0 6.5 2.1 No Yes
Creek
Additional Comments