2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3,44" Prepared by Dynamic Engineering Printed 8/5/2022 roCAD® 10.20-2d s/n 08640 © 2021 Hj 4 Summary for Subcatchment 4S: Basin B - Imp. Runoff == 0.30 cfs @ 12.17 hrs, Volume= 0.029 af, Depth= 3.21" Routed to Pond 4P : Basin B Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area(sf)_CN__Description 4,648 98 __Unconnected pavement, HSG C 4,648 100.00% Impervious Area 4,648 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet) _(ftft)__(ftisec) (cfs) 10.0 Direct Entry, Direct Subcatchment 4S: Basin B - Imp. Hydrograph NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=4,648 sf Runoff Volume=0.029 af Runoff Depth=3.21" Te=10.0 min CN=98 28 6B WO 12 14 15 1820 22 24 28 2B 30°32 34 36 98 4042 48 46 48 90 52 54 98 £6.60 62 Gs 65.68 7072 “Time (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Raintall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 roCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment 4S: Basin B - Imp. Time Precip. Excess Runoff