2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 123 Summary for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Runoff == 5.01 cfs @ 12.17 hrs, Volume= 0.426 af, Depth= 5.52" Time Precip. Excess Routed to Link 3L : Mt, Pleasant Ave - Undetained (hours) (inches) (inches) 0.00 0.00 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 100 0.10 0.00 NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) __CN__Deseription. $00 088 (0.00 38,200 74 575% Grass cover, Good, HSG C 600 074 0.00 2.419 80 _>75% Grass cover, Good, HSG D 700 0.91 0.01 ‘40,319 74 Weighted Average 8.00 1.12 0.05 40,319 100.00% Pervious Area on) tae ga Tc Length Slope Vel Capacity Description 415 71 (rin) (feet) (W)_ (fuses) (cts) too at 38 10.0 Direct Entry, Direct 14.00 6.94 3,99 15.00 7.29 4.29 a i - 16.00 7.54 451 Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. ee Hydrograph 18.00 792 485 19.00 8.07 4.99 (Eka 20.00 821 5.11 21.00 8.33 5.23 5 NOAA 24-hr D 22.00 845 5.33 ” 2300 856 5.43 100-Year Rainfall=8.66' 24.00 8.66 5.52 al = 25.00 866 5.52 Runoff Area=40,319 sf 28.00 «8685.52 Runoff Volume=0.426 af 27.00 868 8.82 z= = 28.00 8.66 5.52 came Runoff Depth=5.52' 29.00 8.66 5.52 z . 30.00 8.66 5.52 2 Te=10.0 min 3100 8.66 5.52 =" 32,00 8.66 5.52 CN=74 33.00 8.66 5.52 34.00 8.66 5.52 35,00 8.66 5.52 36.00 8.66 5.52 37.00 8.66 5.52 38.00 8.66 5.52 39.00 8.66 §.52 O12 46 Sw in Wo Whad ta 28 2090 0294 38 2840 424 40480 S24 80 BBO 62 6608 087072 hain Maes 50!