2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 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 11 40.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC P 4 Summary for Subcatchment 3S: Basin A - Perv. Hydrograph for Subcatchment 3S: Basin A - Perv. Runoff = 0.65¢fs@ 12.18hrs, Volume= 0.056 af, Depth= 1.20" Time Precip. Excess Runoff | Time Precip. Excess Runoff Routed to Pond 3P : Basin A cfs Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs ee ines oo ta Be NOAA 24-hr D 2-Year Rainfali=3.44" ze] iors foo so CS 0.00 .¢ . 5.00 3.44 1.20 0.00 a 4.00 0.18 0.00 56.00 344 1.20 0.00 Area (sf) CN Description. 5.00 0.24 0.00 87.00 344 1.20 0.00 24,500 74 >75% Grass cover, Good, HSG C 6.00 0.29 0.00 58.00 344 1:20 0.00 24,500 7100.00% Pervious Area 700 0.36 0.00 59.00 344 1.20 0.00 8.00 0.45 0.00 60.00 344 1.20 0.00 : i 9.00 0.55 0.00, 6100-344 1.20 0.00 eet a aba 1000 068 0.00 6200 344 120 0.00 = 11.00 0.89 0.01 63.00 3.44 1.20 0,00 10.9 Direct Entry, Direct 12.00 1.65 0.20 64.00 3.44 1.20 0.00 13.00 2.55 0.63 65.00 3.44 1.20 0.00 Subcatchment 3S: Basin A - Perv. 1400 2.78 076 66.00 344 1.20 0.00 15.00 2.89 0.84 67.00 3.44 1.20 0.00 Hydrograph 16.00 2.99 0.90 68.00 3.44 1.20 0.00 17,00 3.08 0.96 69,00 3.44 1.20 0.00 or: Gea} 1800 3.15 1.00 70.00 344 1.20 0.00 4900 320 1.04 71.00 344 1.20 0,00 pe NOAA .24-hr D 20.00 326 1.08 72.00 344 © 1.20 0.00 . 1 21.00 3.31 4.44 085 2-Year Rainfall=3.44' 2200 3361.14 . Runoff Area=24,500 sf eo bea tiae oat Runoff Volume=0.056 af 25.00 344 1.20 F oa " A 3.44 1.20 7 oS Runoff Depth=1.20' 2700 344 1.20 ” — i (28,00 3.44 1,20 © os Te=10:0-min 29.00 344 1.20 usd - CN=74 | 30.00 3.44 = 1.20 31.00 3.44 1.20 32.00 3.44 1.20 33.00 3.44 1.20 34.00 3.44 1.20 35.00 3.44 1.20 3600 3.44 4.20 37.00 344 1.20 38.00 344 1.20 39.00 3.44 1.20 40.00 3.44 1.20 41.00 3.44, 1,20 42.00 3.44 41,20 43,00 3.44 1.20 44.00 3.44 1.20 45.00 344 1.20 46.00 3.44 1,20 47.00 3.44, 1.20 48.00 3.44 1,20 49.00 3.44 1.20 50.00 344 1.20 51.00 3.44 1.20