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HomeMy WebLinkAbout20150598 Ver 1_Plans_20150616 North Carolina Department of Transportation Highway Stormwater Program STORMWATER MANAGEMENT PLAN (Version 1.2; Released July 2012)FOR LINEAR ROADWAY PROJECTS Project/TIP No.:17BP.4.R.56County(ies):Wayne Page 1of 1 General Project Information Project No.:17BP.4.R.56Project Type:Date: Bridge Replacement5/21/2015 NCDOT Contact:Contractor / Designer: Chad CogginsWetherill Engineering, INC Address:Address: Highway Division 4Wetherill Engineering, INC 509 Ward Blvd., P0 BOX 3165559 Jones Franklin Road, Suite 164 Wilson, NC 27895Raleigh, NC 27606 Phone:(252) 237-6164Phone:(919) 851-8077 Email:Email:HSingh@wetherilleng.com ccoggins@ncdot.gov City/Town:N/ACounty(ies):Wayne River Basin(s): NeuseCAMA County? No NCDWQ Stream Index No.: Primary Receiving Water: Bear Creek27-72-(0.1) Primary: Class C NCDWQ Surface Water Classification for Primary Receiving Water Supplemental: Nutrient Sensitive Waters (NSW)Swamp Waters (Sw) Other Stream Classification: 303(d) Impairments:biological impairment Buffer Rules in EffectNeuse Project Description Rural (Residential) Project Length (lin. Miles or feet): Surrounding Land Use: 0.07 Proposed ProjectExisting Site Project Built-Upon Area (ac.) 0.60ac.0.52ac. (2) 11' lanes with grassed shoulders and up to 4.25' shoulders with guardrail. 4.25' (2) 10' lanes with grassed shoulders Typical Cross Section Description: shoulders are variable width paved. Average Daily Traffic (veh/hr/day): Design/Future:1550 (2013)Existing:1100 (2012) Replace bridge no. 14 over Bear Creek on SR 1714 (Parkstown Rd.). Use 1 @70 24" Cored Slab Bridge. Two TB 2GI will outlet outside the buffer zone with 15" CSP with General Project Narrative: Class B rip rap is used to stabilize the outlet. The proposed grassed swale special lateral 'V' ditch begins at Sta -L-11+50 (RT) to Sta -L- 13+00 (RT) and from Sta -L-13+50 (LT) to Sta -L- 14+25 (LT). The proposed grassed swale special lateral 'Base' ditch begins at Sta -L-11+50 (LT) to Sta -L- 13+00 (LT) and from Sta -L-13+50 (RT) to Sta -L- 14+00 (RT). The proposed grassed swale tie into the existing ditches at Sta -L-11+50 (LT,RT) and Sta -L-14+50 (LT,RT). Rip rap at embankment will be used at the outlet of all the ditches at Sta -L-13+00 (LT,RT) to Sta -L- 13+20 (LT,RT) and at Sta -L-13+30 (LT,RT) to Sta -L- 13+50 (LT,RT) . All proposed grassed swales meet the design criteria for a grassed swale. No deck drains required. References North Carolina Department of Transportation Highway Stormwater Program STORMWATER MANAGEMENT PLAN (Version 1.2; Released July 2012) FOR LINEAR ROADWAY PROJECTS Project/TIP No.: 17BP.4.R.56County(ies):Wayne Page of 1 Swales Stream Drainage Recommended Actual Longitudinal Rock Sheet StationCrossing Base WidthFront SlopeBack SlopeAreaTreatment LengthLengthSlopeQ2V2Q10V10Checks No.(From / To)Station(ft)(H:V)(H:V)(ac)(ft)(ft)(%)(cfs)(fps)(cfs)(fps)Used -L- 11+50 LT 4.03:13:110.881088150 *7.92.010.22.2 2.09% -L- 13+00 LT -L- 11+50 RT 0.03:11.251501.19%2.51.6 3:11253.21.7 -L- 13+00 RT -L- 13+50 LT 0.03:13:10.78781.48%1.61.5 1002.01.6 -L- 14+50 LT -L- 13+50 RT 3.03:16.00600100 *7.02.04%2.0 3:19.02.1 -L- 14+50 RT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Have minimum design criteria, as presented in the NCDOT Best Management Practices Toolbox, Version 1 (March 2008), been met and verified? If No, YESNO provide further explanantion of why design criteria was not met. Additional Comments * Per Chad Coggins, swale recommended treatment length is based on the increase in impervious area in the vicinity of the project. Hence, the swale length of 150' and 100' satisfies design criteria for a grassed swale. WETLAND PERMIT IMPACT SUMMARY WETLAND IMPACTSSURFACE WATER IMPACTS Hand Existing Existing PermanentTemp. ExcavationMechanized ClearingPermanent Temp. ChannelChannelNatural SiteStationStructureFill InFill Inin Clearingin SW SWImpactsImpactsStream No.(From/To)Size / TypeWetlandsWetlands Wetlandsin Wetlands WetlandsimpactsimpactsPermanentTemp.Design (ac)(ac)(ac)(ac)(ac)(ac)(ac)(ft)(ft)(ft) 112+90 TO 13+60 -L-BRIDGE 140.0165 TOTALS:0.0165 NC DEPARTMENT OF TRANSPORTATION DIVISION OF HIGHWAYS Wayne / Greene County WBS -17BP.4.R.56 (DB4B-950014) Brg. #14 over Bear Creek on SR 1714 (Parkstown Rd.) SHEET 5 of 55/21/2015 ATN Revised 3/31/05 BUFFER IMPACTS SUMMARY IMPACT BUFFER REPLACEMENT TYPEALLOWABLEMITIGABLE ZONE 1ZONE 2TOTALZONE 1ZONE 2TOTALZONE 1ZONE 2 ROADPARALLEL STRUCTURE SIZE / STATION 22222222 CROSSINGBRIDGEIMPACT(ft)(ft)(ft)(ft)(ft)(ft)(ft)(ft) SITE NO.TYPE(FROM/TO) Sheet 4A70' BRIDGE (14)12+90 TO 13+60 LT.X29863823368 Sheet 4A70' BRIDGE (14)12+90 TO 13+60 RT.X194701947 1ROAD12+62 TO 12+90 LT.X153609762 1ROAD13+60 TO 13+88 LT.X7813801458 1ROAD12+68 TO 12+90 RT.X51681732 1ROAD13+60 TO 13+89 RT.X214645859 TOTAL: 542936979126 N.C. DEPT. OF TRANSPORTATION DIVISION OF HIGHWAYS Wayne / Greene COUNTY WBS-17BP.4.R.56 (DB4B-950014) Brg. #14 over Bear Creek on SR 1714 (Parkstown Rd) SHEET 5 OF 55/21/2015 Rev. May 2006