20171540 Ver 1_SW Plan_20171130

I Ii�Il���dV 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: 17BP.2.R.81 TIP No.: SF-730113 County(ies): Pitt Page 1 of 2
General Project Information
WBS Element: 17BP2.R.81 TIP Number: SF-730113 Project T pe: Brid e Replacement Date: 10/2/2017
NCDOT Contact: Ja B. Johnson - Division Environmental Officer Contractor / Desi ner: RK&K - Eleni Ri s, 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: eri s rkk.com
Cit ITown: Bethel 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 : 300 ft. 0.057 mi. Surroundin Land Use: Rural
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.2 ac. 0.2 ac.
Typical Cross Section Description: 2-lanes at 11' each with 2' to 4' paved shoulders 2-lanes at 9' each with 7' unpaved shoulders
Annual Avg Daily Traffic (vehlhr/day): Desi n/Future: 415 Year: 2038 Existin : 320 Year: 2012
General Project Narrative: This project replaces existing bridge #730113: 1@ 31'-2". The bridge consists of prestressed precast concrete channels. The bridge is 23'-10" wide out-to-out, and is skewed
(Description of Minimization of Water 90 degrees to the road. The proposed bridge is a 45' long single span bridge, 33'-0" wide out-to-out, and utilizes 21" cored slab units. The proposed bridge will incorporate
Quality Impacts) sloped abutments with 4.0' caps skewed at 90 degrees to the roadway.
In accordance with Tar-Pamlico River Buffer regulations, the proposed bridge does not contain deck drains. There is a high point on the bridge so runoff from the bridge will be
split and captured at both ends of the bridge. Runoff from the high point back to the begin bridge end will be captured in a storm drainage system and carried through the buffer
and then discharged onto the Class II rip rap from the Rip Rap at Embankment. Runoff from the high point to the end of the bridge will be captured by grated inlets and
discharged onto a Class B rip rap outlet pad at -L- 13+04 (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 a 2' base ditch to replace an existing ditch through the buffer in the northeast quadrant. The grade on the proposed 2' base ditch was set to reduce
the velocity of the water to less than 2 ft/sec as it travels through the buffer.
Waterbody Information
Surface Water Body (1): Suggs Branch NCDWR Stream Index No.: 28-100-1
NCDWR Surface Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: Nutrient Sensitive Waters (NSW)
Other Stream Classification: None
Impairments: None
Aquatic T&E Species? No Comments:
NRTR Stream ID: N/A 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)

I-Ilgh��cly North Carolina Department of Transportation �
STOYlIlWatel" �I� 1�
,.,.,,.,, Highway Stormwater Program � ! �
STORMWATER MANAGEMENT PLAN —
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP2.R.81 TIP No.: SF-730113 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- 12+60 LT (1)Suggs 2.0 3.0 3.0 1.5 153 115 0.59°/ 4.4 1.8 5.7 1.9 No No
35.800475 / -77.368469 Branch
Additional Comments