20210145 Ver 1_(SF-890329)_HYD_SMPv2.08_(20180814) (Aug 2018)_20210503

(Version 2.08; Released April 2018)17BP.10.R.141TIP No.:SF-890329County(ies):Union Page 1 of 1TIP Number:Date:Phone:Phone:Email:Email:County(ies):CAMA County?YesDesign/Future:Year:2025Existing:Year:Aquatic T&E Species?NoComments:NoNoNoWetlands within Project Limits?NoneNoneSupplemental Classification: WoodedE. Fork Twelve Mile Creek11-138-20.330.12Project DescriptionProposed ProjectCatawbaRiver Basin(s): City/Town:0.48Typical Cross Section Description: Surrounding Land Use: General Project Narrative:(Description of Minimization of Water Quality Impacts)[e-mail]:2/1/2019UnionMonroeLuther G. HaywoodAlbemarle, 28001WBS Element:Bridge ReplacementWBS Element:STV Engineers, Inc. / Shirshant SharmaNCDOT Contact:(704) 983 - 4400Charlotte, NC 28202Contractor / Designer:(704) 816-2556900 West Trade Street, Ste. 715North Carolina Department of TransportationHighway Stormwater Program STORMWATER MANAGEMENT PLAN FOR NCDOT PROJECTSProject Type:716 W Main St.Address:General Project InformationSF-89032917BP.10.R.141Impairments:Other Stream Classification: Primary Classification: Project Built-Upon Area (ac.)The existing 25' 6" single span bridge over East Fork Twelve Mile Creek on SR 1315 (New Town Rd) is being replaced with 25' 5" X 10' 2" aluminum box culvert buried to a depth of one foot. The road will be normal crown at 2% with 11' travel lanes and 3' shoulders. The existing bridge structure will be removed. Overall drainage patterns will be maintained. There are roadside ditches that flow towards the culvert on both sides of the structure. The proposed design will interfere with existing ditches flow patterns. Proposed revisions to the existing ditches will be performed to maintain flows. Class-I rip rap abutment protection on both banks of the stream is also proposed to prevent future erosion and stream migration. Deck drains are not required for this culvert. Impervious dikes will be used around the culvert and open cut water line to prevent the sediment from entering the stream and will be dewatered as needed.N/ABuffer Rules in Effect:None6500Culvert : Two 11' lanes, 3' shouldersApproach: Two 11' lanes, variable shoulders Waterbody Information2013NCDWR Stream Index No.:NRTR Stream ID:Annual Avg Daily Traffic (veh/hr/day):Existing SiteProject Length (lin. miles or feet): ac.Surface Water Body (1): Class CNCDWR Surface Water Classification for Water Bodyac.Bridge: Two 9' lanes, 6' shouldersApproach: Two 9' lanes, 2' unpaved [e-mail] Includes Bridge Spanning Water Body? Deck Drains Discharge Over Buffer? Dissipator Pads Provided in Buffer?NoDeck Drains Discharge Over Water Body?(If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the General Project Narrative)(If yes, provide justification in the General Project Narrative)