20171541 Ver 1_SW Plan_20171130

I Ii�;Il���dV North Carolina Department of Transportation /i�`
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STORMWATER MANAGEMENT PLAN --
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.2.R.79 TIP No.: SF-730124 County(ies): Pitt Page 1 of 2
General Project Information
WBS Element: 17BP2.R.79 TIP Number: SF-730124 Project T pe: Brid e Replacement Date: 6/27/2017
NCDOT Contact: Ja B. Johnson - Division Environmental Officer Contractor / Desi ner: RK&K - Jonathan Whittin ton, PE
Address: 105 Pactolus Highway (NC 33) Address: g00 Ridgefield Drive
P. O. Box 1587 Suite 350
Greenville, NC 27835 Ralei h, NC 27609
Phone: [phone] Phone:[phone]
Email: 'b'ohnson ncdot. ov Email: 'whittin ton rkk.com
Cit ITown: Stokes Count ies : Pitt
River Basin s: Tar-Pamlico CAMA Count ? No
Wetlands within Project Limits? No
Pro'ect Description
Pro'ect Len th lin. miles or feet : 550 ft. 0.104 mi. Surroundin Land Use: Rural
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.4 ac. 0.3 ac.
Typical Cross Section Description: 2-lanes at 11' each with 2' to 4' paved shoulders 2-lanes at 10' each with 2' unpaved shoulders
Annual Avg Daily Traffic (vehlhr/day): Desi n/Future: 505 Year: 2038 Existin : 390 Year: 2012
General Project Narrative: This project replaces existing bridge #730124: 1@16', 1@14'-10", 1@15', 1@14'-10", 1@15', 1@15'-9", for an overall length of 91'-5". The bridge consists of a reinforced
(Description of Minimization of Water concrete floor on timberjoists. The bridge is 29'-9" wide out-to-out, and is skewed 90 degrees to the road. 100' long bridge with a span arrangement of 1@40', 1@60' utilizing
Quality Impacts) 21" cored slabs. The proposed bridge will incorporate sloped abutments with 2.5' caps skewed at 90 degrees to the roadway.
In accordance with Tar-Pamlico River Buffer regulations, the proposed bridge does not contain deck drains. Runoff from the bridge will be captured by a grate inlet and
discharged onto a Class B rip rap outlet pad at -L- 15+g3 (LT) outside the buffer. 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.
The proposed project utilizes 2' base and 'V' ditches to replace existing ditches that are impacted by the project. The northwest and northeast quadrants are dispersed by these
ditches at a slight grade to reduce velocities prior to outleting into the wetlands.
Waterbody Information
Surface Water Body (1): Briery Swamp NCDWR Stream Index No.: 28-103-8
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: Tar-Pamlico
Project Includes Bridge Spanning Water Body? Yes Deck Drains Discharge Over Buffer? No Dissipator Pads Provided in Buffer? No
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)

I-Ilgh��cly North Carolina Department of Transportation �
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,.,.,,.,, Highway Stormwater Program � ! �
STORMWATER MANAGEMENT PLAN —
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP2.R.79 TIP No.: SF-730124 County ies): Pitt 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 ft H:1 H:1 ac ft ft % cfs f s cfs f s Used Buffer Rules?
4 -L- 18+70 LT (1)Briery 2.0 3.0 3.0 4.1 412 80 0.30°/ 11.4 1.8 14.8 1.9 No No
35.69253 / -77.20633 Swamp
4 -L- 18+50 RT (1)Briery 0.0 3.0 3.0 0.6 58 25 0.80°/ 1.7 1.6 2.2 1.7 No No
35.69255 / -77.20633 Swamp
Additional Comments