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HomeMy WebLinkAbout3101 E. Brundage Lane Drainage Study Phase 1Site Location: Bakersfield Coordinates: Lat: 35.3538, Long: -118.9695 SF Acres BHT #:21103 Total Surface Area = 82764 1.90 Date:2/22/22 Phase 1 Surface Area = 5100 0.12 Commercial By:JMP Year Storm 1-hr Rainfall Rainfall (in) (in) 10yr 4day 2.220 Values from -- NOAA Atlas 14, Vol. 6, Ver. 2 10yr 5day 2.320 <== Calculated from Figure D-3 10yr 7day 2.510 http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=pa Land Use = Commercial Impervious Cover = 100% Commercial Fig. C-3 KCHM Runoff Volume =[(D10yr-5day)/12] (ai) (Area)<== Engineering Bulletin 11-02, dated 12-21-11 D10yr-5day =10 yr 5 day depth of rainfall (in.) obtained from NOAA Atlas 14, Vol 6, Ver. 2.0 ai =Average percent of impervious area (sq.ft.) Area = Drainage area of total development (sq.ft) Total Runoff Volume = 0.370 acre-ft = 16001 ft3 Phase 1 Runoff Volume = 0.020 acre-ft = 986 ft3 Bottom Dimensions 2500 ft2 <== Bottom Surface Area Length (ft) = 50 <== From Plans Width (ft) = 50 <== From Plans Height (ft) = 0.5 <== From Plans Side Slope = 4 <== From Plans Freeboard (ft)= 0 Actual H (ft)= 0.5 <== From Plans Top Dimensions Top Slope Water Level <== Top Surface Area at Top of Slope Length (ft) = 54.00 54.00 2916.00 ft2 <== Top Surface Area w/ Freeboard Width (ft) = 54.00 54.00 A1/2ws 2704.00 ft2 <== Area Length (ft) = 52.00 Width (ft) = 52.00 Volume Provided= 0.03 acre-ft 1,353 ft3 RETENTION BASIN - VOLUME PROVIDED Prismoidal Formula: V= 1/6 (Abtm + 4*Amid + Atop) * D Abtm= 2500 ft2 Amid= 2704 ft2 Atop= 2916 ft2 D= 0.5 ft Volume Provided= 1353 ft3 Volume Provided= 0.03 ac-ft Retention Basin Design - PHASE 1 DIESEL FACILITY @ 3101 E. BRUNDAGE LN Drainage Calculations Page 1 of 1 2/22/22 y = 0.0967x + 1.8333 R² = 1 1.00 10.00 1 10PRECIPITATION (inches)DURATION (Days) KCHM - FIGURE D-3 DIESEL FACILITY @ 3101 E. BRUNDAGE LN Linear (DIESEL FACILITY @ 3101 E. BRUNDAGE LN)