20190339 Ver 1_(SF-890097)_HYD_SMPv2.08_(20180806) (Apr 2018)_20190315

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STORMWATER MANAGEMENT PLAN �=^%'
(Version 2.08; Released April 2018) FOR NCDOT PROJECTS
WBS Element: 17BP.10.R.134 TIP No.: SF-890097 County(ies): Union Page 1 of 1
General Project Information
WBS Element: 17BP.10.R.134 TIP Number: SF-890097 Project Type: Bridge Replacement Date: 8/6/2018
NCDOT Contact: Marc Shown Contractor / Designer: STV Engineers Inc. / Shirshant Sharma
Address: 1020 Birch Ridge Drive Address: g00 West Trade Street, Ste. 715
Raleigh, NC 27610 Charlotte, NC 28202
Phone: [phone] Phone: [phone]
Email: mshown ncdot. ov Email: Shirshant.Sharma stvinc.com
Cit ITown: Marshville Count ies : Union
River Basin(s): Yadkin-Pee Dee CAMA County? No
Wetlands within Project Limits? Yes
Pro'ect Description
Project Length (lin. miles or feet): 0.138 miles Surrounding Land Use: wooded
Proposed Pro'ect Existin Site
Pro'ect Built-Upon Area ac. 0.4 ac. 0.3 ac.
Typical Cross Section Description: Bridge : Two 10' lanes, 3'-11" paved shoulders Bridge: Two 9' lanes, 3' shoulders
Approach: Two 10' lanes, variable paved shoulders Approach: Two 9' lanes, 6' grassed shoulders
Annual Avg Daily Traffic (veh/hr/day): Design/Future: 340 Year: 2025 Existin : 170 Year: 2013
General Project Narrative: The existing 146' triple-span bridge over Lanes Creek on SR 1929 (Philadelphia Church Rd) is being replaced with a 155' double-span bridge with a span arrangement of 1@55'
(Description of Minimization of Water (21" cored slab), 1@100' (39" box beam). The bridge will have 1.5:1 sloping abutments. The bridge will be superelevated at 2% with 10' travel lanes and 3'-11" shoulders, 27"-
Quality Impacts) 10" clear width and 30'-0" OTO width. The existing bridge structure will be removed. Overall drainage patterns will be maintained. There are roadside ditches that flow towards
the bridge on both sides of the structure. The proposed design will interfere with one of the existing ditches flow patterns. A proposed ditch will be used to maintain flow to the
bridge. On the begin side of the bridge, a traffic bearing grated drop inlet with double frame and grates (2GI) was placed on the right side of the roadway in the shoulder berm
gutter to pick up runoff from the bridge. Class-II rip rap abutment protection on both bridge abutments is also proposed to prevent future erosion and stream migration. Deck
drains are needed, so 5"x4" slots on 10' centers will be used for the 21" cored slab span and 8"x4" slots on 3' centers will be used for the 39" box beam span. Deck drains do not
discharge directly into creek. No dissipator pads were used because the Class-II rip rap will prevent erosion and dissipate flow.
Waterbody Information
Surface Water Body (1): Lanes Creek NCDWR Stream Index No.: 13-17-40-(1)
NCDWR Surface Water Classification for Water Body Primary Classification: Water Supply V(WS-V)
Supplemental Classification: None
Other Stream Classification: None
Impairments: None
Aquatic T&E Species? No Comments:
NRTR Stream ID: Buffer Rules in Effect: N/A
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)