2022 08 Drainage Report

2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 Summary for Subcatchment 1S: Basin A - Imp. Runoff = 0.76 cfs @ 12.17 hrs, Volume= Routed to Pond 3P : Basin A 0.075 af, Depth= 8.42" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, df= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf)_ CN Description 4,655___ 98 Unconnected pavement, HSG C 4,655 100.00% Impervious Area 4,655, 100,00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) _(fv/t)_(fiisec)__(cfs) 10.0 Direct Entry, Direct Subcatchment 1S: Basin A - Imp. Hydrograph on bee NOAA 24-hr D 654 100-Year Rainfall=8.66" 064 Runoff Area=4,655 sf me. Runoff Volume=0.075 af $ oss] Runoff Depth=8.42" Ee ~ Te=10.0 min 03: CN=98 FUT ETO Ta wave toa ae a 8 2032 9 0 98 4042 448 48802 So S860 G2 OK GHG 7072 “Tina (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC. Page 110 Time Precip. Excess (hours) (inches) (inches) Hydrograph for Subcatchment 1S: Basin A - Imp. Runoff | Time Precip. Excess Runoff (hours) (inches) (inches) 0.00 0.00 0.00 0.00 0.00 0.00 0.00