20180265 Ver 1_C5600B_HYD_SMP_20180212_20180223

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,,.,.,,,.,, Highway Stormwater Program '�
STORMWATER MANAGEMENT PLAN - --
(Version 2.07; Released October 2016) FOR NCDOT PROJECTS
WBS Element: 50061.1.3 TIP No.: C-5600B County(ies): Scotland Page 1 of 1
General Project Information
WBS Element: 50061.1.3 TIP Number: C-5600B Project Type: Other Date: 2/12/2018
NCDOT Contact: Brad Smythe, PE Contractor / Designer: AECOM
Address: Design & Construction Branch Address: 701 Corporate Center Drive
1556 Mail Service Center Suite 475
Raleigh, NC 27699-1556 Raleigh, NC 27607
Phone: [phone] Phone: [phone]
Email: [e-mail] Email: william.steqhens(a�aecom.com
City/Town: Laurinburg County(ies): Scotland
River Basin(s): Lumber CAMA County? No
Wetlands within Project Limits? Yes
Project Description
Project Length (lin. miles or feet): 1.4 lin. miles Surrounding Land Use: Woods, Industrial
Proposed Project Existing Site
Project Built-Upon Area (ac.) 7.6 ac. 4.4 ac.
Typical Cross Section Description: Single main track with single and dual siding tracks on a portion of the proposed project Single main track with single and dual siding tracks.
length. Variable width between tracks. Side slopes primarily 2:1.
Annual Avg Daily Traffic (veh/hr/day): Design/Future: NA Year: NA Existing: NA Year: NA
General Project Narrative: The CSX proposed Dixie Siding Extension along the CSX SE Line in Scotland County between MP 270.52 and MP 271.92 from Kiser road to I-74 will rehab existing southern
(Description of Minimization of Water siding track in portions of the project as well as extending the adjacent siding track.
Quality Impacts) There is one jurisdictional stream crossing the middle of the project at 955+00 which is not impacted by the design. The proposed design calls to replace the existing 4-span
bridge with a 63.67' continuous span bridge over Little Creek. The proposed design also calls for a special lateral base ditch at Sta. 944+00 channeling into riprap toe protection
along the fill slope of the proposed siding track. Flow velocity entering the immediate existing wetland is limited to no greater than 2 ft/sec.
Other measures to minimize environmental impacts include making the fill slopes 2:1 to lessen the construction footprint of the project. Deck drainage for the proposed bridge
over Little Creek will be designed so that no storm water discharges directly into the stream surface. The existing bridge bents to be removed in the stream will be called to be
cut at the mudline to eliminate impacts.
Waterbody Information
Surface Water Body (1): Little Creek (Leith Creek - Johns Pond) NCDWR Stream Index No.: 14-33a
NCDWR Surface Water Classification for Water Body Primary Classification: Class C
Supplemental Classification: Swamp Waters (Sw)
Other Stream Classification:
Impairments: None
Aquatic T8�E Species? No Comments: Little Creek crosses the project as a tributary from Leith Creek
NRTR Stream ID: Buffer Rules in Effect: N/A
Project Includes Bridge Spanning Water Body? Yes Deck Drains Discharge Over Buffer? N/A 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)