20171363 Ver 1_SW Plan_20171026

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STORMWATER MANAGEMENT PLAN —
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 17BP.4.R.77 TIP No.: SF-320086 County(ies): Edgecombe Page 1 of 1
General Project Information
WBS Element: 176P.4.R.77 TIP Number: SF-320086 Project Type: Bridge Replacement Date: 7/24/2017
NCDOT Contact: Chad Coggins Contractor / Designer: Kevin Alford, PE (Wetherill Engineering, Inc.)
Address: P.O. Box 3165 Address: 1223 Jones Franklin Road
Wilson, NC 27895 Raleigh, NC 27606
Phone: [phone] Phone: [phone]
Email: [e-mail] Email: [e-mail]
City/Town: Tarboro County(ies): Edgecombe
River Basin(s): Tar-Pamlico CAMA County? No
Wetlands within Project Limits? No
Project Description
Project Length (lin. miles or feet): 0.140 miles Surrounding Land Use: Rural Residential
Proposed Pro'ect Existing Site
Project Built-Upon Area ac. 0.6 ac. 0.5 ac.
Typical Cross Section Description: Two 12 foot Travel Lanes with 2 foot paved shoulders and 6 foot grassed shoulders on Two 12 foot Travel Lanes with 2 foot paved shoulders and 6 foot grassed shoulders on
each side each side
Annual Avg Daily Traffic (veh/hr/day): Design/Future: N/A Year: N/A Existing: 4600 Year: 2017
General Project Narrative: The purpose of the project is to replace Bridge No. 86 on US 64 Alt over Penders Mill Run in Edgecombe County. The existing bridge is 54.0 feet long. The replacement
(Description of Minimization of Water structure will be a single span 90' long bridge, providing a 33.83' clear deck width. The roadway grade of the new structure will be approximately the same as the existing
Quality Impacts) structure. There will be no direct discharge into the stream (no deck drains on the bridge). The existing bridge had one bent in the stream, while the proposed bridge will have
none. All existing stormwater drainage patterns were maintained on the project to the fullest extent. The storm drainage system picking up the bridge deck drainage will
discharge outside of Neuse buffer zone 2 onto a dissipator pad. The velocity at the outfall from the deck drainage is non-erosive. All the existing ditches on the project outlet off
the right of way outside of Neuse Buffer Zone 2 expect for the ditch in the Southwest quadrant. This ditch matched the existing flow patterns and was ditched to the stream,
where it was outleted onto rip rap on the embankment of the stream. The existing ditch in this location was filled over. The stream banks on the east side of the bridge will be
lined with Class II rip rap due to existing scour on the banks. The existing concrete bridge abutments will retained.
Waterbod Information
Surface Water Body (1): Penders Mill Run NCDWR Stream Index No.: 28-77
NCDWR Surface Water Classification for Water Body Primary Classification: Water Supply IV (WS-IV)
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)