20191245 Ver 1_U-4714AB_HYD_SMP_20190917

(Version 2.08; Released April 2018)TIP No.:U-4714ABCounty(ies):Mecklenburg Page 1 of 2TIP Number:Date:Phone:Phone:Email:Email:County(ies):CAMA County?NoDesign/Future: Year:2040Existing: Year:Aquatic T&E Species?Comments:No NoNoWetlands within Project Limits?NoneSupplemental Classification: Urban (residential and commercial)Fourmile Creek (SBB,SBC, SSG, SAG)11-137-9-44.50.5 milesProject DescriptionProposed ProjectYadkin-Pee DeeRiver Basin(s): City/Town:4.6Typical Cross Section Description: Surrounding Land Use: General Project Narrative:(Description of Minimization of Water Quality Impacts)[e-mail]:6/7/2019MecklenburgCharlotte Malcolm WatsonRaleigh, NC 27610 WBS Element:Roadway WideningWBS Element:Blythe Construction/WSP (Karl Dauber)NCDOT Contact:[phone]Suite 610Charlotte, NC 28203Contractor / Designer:(704) 342-54031001 Morehead Square DriveNorth Carolina Department of TransportationHighway Stormwater Program STORMWATER MANAGEMENT PLAN FOR NCDOT PROJECTSProject Type:1020 Birch Ridge DriveAddress:General Project InformationU-4714ABImpairments:Other Stream Classification: Primary Classification: Project Built-Upon Area (ac.)The NCDOT is widening a section of I-485 that lies within the municipal boundaries of the Cities of Charlotte and Matthews. The Design-Build Project I-5507 / R-0211EC / U-4714AB will provide an eastbound and westbound Express Lane within the I-485 median from I-77 to US 74 (Independence Boulevard), a distance of approximately 16.6 miles. The project will also provide an I-485 / Weddington Road interchange, and modify the I-485 / East John Street - Old Monroe Road interchange.The Impacts for U-4714AB are located on Sheets 64, 65 and 77 of the plan set and are in relation to the widening of 485 and John Street that is needed to accomodate an upgraded interchange at John Street.Construction will unavoidably impact several streams and wetlands. Where practicable, 2:1 slopes will be used to minimize impacts. Where culverts are being extended in jurisdictional streams rip rap for stabilization is being installed on banks only. Best Management Practices:*Detention Basin*Promotion of sheet flow and infiltration with grassed shoulders except were shoulder berm gutter was required.*Drainage systems outlet to rip rap pads or riprap lined ditches.*Riprap on embankments was used to prevent erosion where ditches enter streams.N/ABuffer Rules in Effect:N/ANone1186There are several cross sections for this project in the typicals provided with the Redline Drainage Plans. Essentially, the project adds toll lanes in the median. In some cases a ditch section is revised to provide pavement. In other cases a large paved median is reduced to account for this new traffic pattern. John street will be expanded to 2 lanes either direction.Waterbody Information2015NCDWR 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.There are 2 existing cross section on 485.- Then as you travel on I 485 there are 2 lanes either direction with a variable width grassed median.-John Street is a typically one lane either direction and a middle turn [e-mail] Includes Bridge Spanning Water Body? Deck Drains Discharge Over Buffer? Dissipator Pads Provided in Buffer?N/ADeck 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)
(Version 2.08; Released April 2018)TIP No.:U-4714ABCounty(ies):Mecklenburg Page 2 of 2Sheet No.Surface Water BodyDrainage Area(ac)New Built-Upon Area(ac)Volume Treated(ac-ft)(1)Fourmile Creek WBS Element:Precipitation Depth Treated over NBUA(in)BMP Associated w/ Buffer Rules?NoBMP TypeStation & Coordinates (Road and Non Road Projects)-Y6LPC- 15+00 LTJohn St6516.0 4.7Dry Detention Basin1.490.55North Carolina Department of TransportationHighway Stormwater ProgramSTORMWATER MANAGEMENT PLANFOR NCDOT PROJECTSOther Best Management PracticesAdditional Comments