20190093 Ver 1_B-5654_HYD_SMPv2.07_28_20190122

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Stormwater
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STORMWATER MANAGEMENT PLAN
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 38410.3.1 TIP No.: B-5654 Count ies : Johnston Pa e 1 of 2
General Project Information
WBS Element: 38410.3.1 TIP Number: B-5654 Project Type: Brid e Re lacement Date:
NCDOT Contact: Paul And Jordan, P.E. Contractor / Designer: Vau hn & Melton Consultin En ineers
Address: 1590 Mail Service Center Address: 1318-F Patton Avenue
Raleigh, NC 27699-1590 Asheville, NC 28806
Phone: [phone] Phone: [phone]
Email: a�ordan ncdot. ov Email: bsridnour vau hnmelton.com
City/Town: Cla on, SC Count ies : Johnston
River Basin(s): Neuse CAMA Count ? No
Wetlands within Project Limits? Yes
Project Description
Project Length (lin. miles or feet): 0.09 mi Surrounding Land Use: Forested Rural Residential, NCDOT wetlands mitigation site
Proposed Project Existing Site
Project Built-Upon Area (ac.) 0.4 ac. 0.3 ac.
Typical Cross Section Description: 2@ 10' Travel Lanes with Minimal Existing Grass Shoulders 2@ 12' Travel Lanes with 4' Paved and 2' Grassed Shoulders (6' Total)
Annual Avg Daily Traffic (veh/hr/day): Desi n/Future: n/a Year: n/a Existin : 10600 Year: 2016
General Project Narrative: Bridge to be replaced on existing alignment. Minimum bridge length used to comply with all FEMA regulations and maintain acceptable setbacks from existing jurisdictional
(Description of Minimization of Water lines. No deck drains required on bridge. Stormwater will be discharged outsie of buffer to a point sufficient to provide treatment of bridge impervious area. No ditches
Quality Impacts) proposed through wetlands.
Waterbody Information
Surface Water Body (1): White Oak Creek NCDWR Stream Index No.: 27-43-11
NCDWR Surface Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: Nutrient Sensitive Waters NSW
Other Stream Classification: None
Impairments: None
A uatic T&E S ecies? No Comments: None Noted.
NRTR Stream ID: N/A 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)

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STORMWATER MANAGEMENT PLAN �";'"'°""�`����
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 38410.3.1 TIP No.: B-5654 County(ies): Johnston Page 2 of 2
Swales
Station & Coordinates Base Front Back Drainage Recommended Actual Longitudinal Rock BMP
Sheet (Road and Non Road SurFace Width Slope Slope Area Treatm't Length Length Slope Q2 V2 Q10 V10 Checks Associated w/
No. Projects) Water Body (ft) (H:1) (H:1) (ac) (ft) (ft) (%) (cfs) (fps) (cfs) (fps) Used Buffer Rules?
4 13+50 -L- (1)White Oak 0.0 3.0 3.0 2.0 200 200 1.25%
15+50 -L- Creek 5.0 1.0 7.4 1.3 No Yes
4 16+25 -R- (1)White Oak 0.0 3.0 3.0 1.0 100 100 0.50% 1.7 0.4 2.2 0.4 No Yes
17+25 -R- Creek
Additional Comments