2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hrD 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" 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 P 1 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 62 Summary for Subcatchment 3S: Basin A - Perv. Hydrograph for Subcatchment 3S: Basin A - Perv. Runoff == 1.41 cfs @ 12.18 hrs, Volume= 0.119 af, Depth= 2.54" Time Precip. Excess Runoff Runoff Routed to Pond 3P : Basin A (hours) (inches) (inches) (cfs) (cts) 0.00 0.00 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 ane tay aa ng NOAA 24-hrD 10-Year Rainfall=5.22" 500 oo clon 00 a 4.00 0.00 0.00 0.00 Area (sf) CN __Desoription 5.00 0.00 0.00 0.00 24,500 74 __>75% Grass cover, Good, HSG C 6.00 0.00 0.00 0.00 24,500 100.00% Pervious Area 7.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 Te Length Slope Velocity Capacity Description ad wed joo oa oy “st “eel ae ig te ig 3 10.0 Direct Entry, Direct 12.00 061 0.58 0.00 13.00 1.50 0.22 0.00 Subcatchment 3S: Basin A - Perv. 14.00 1.73 0.14 0.00 15.00 1.89 0.08 0.00 icrogreh. 16.00 2.01 0.06 0,00 17.00 2.40 0.05 0.00 = 18.00 219 0.04 0.00 19.00 2.26 0.04 0,00 NOAA 24-hr D 20.00 232 0.04 0.00 infall=5.22" 21.00 2.38 0.03 10-Year Rainfall=5.22 2200 244 0.03 =; 23.00 2.49 0.03 Runoff Area=24,500 sf ae or na * 25.00 254 0.00 g 26.00 2.54 0.00 g 27.00 254 0.00 3 28.00 2.54 0.00 * 29,00 254 0.00 30.00 254 0.00 31.00 254 0.00 32,00 2.54 0.00 33.00 2.54 0.00 34.00 254 0.00 35.00 2.54 0.00 36.00 2.54 0.00 os 37.00 2.54 0,00 0 "J6 18 20 22 24 26 28 30 32 34 36 38 40 42 44 45 48 50 52 54 56 $8 60 G2 G4 65 68 70 72 38.00 2.54 0.00 ‘Time (hours) 39,00 254 0.00 40,00 2.54 0.00 41,00 2.54 0.00 42.00 2.54 0.00 43.00 2.54 0,00 44.00 2.54 0.00 45.00 254 0.00 46.00 2.54 0.00 47.00 254 0.09 48.00 254 0.00 49.00 254 0.09 50.00 2.54 0.00 51.00 2.54 0.00