2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 1 Summary for Subcatchment 4S: Ba: B-Imp. Runoff = 0.76 cfs @_ 12.17 hrs, Volume= 0.075 af, Dept 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 100-Year Rainfall=8.66" Area (sf)__CN__ Description 4,648 98 Unconnected pavement, HSG C. 4,648 10.00% Impervious Area 4,648 100.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) _(ft/ft) _(ftisec)_(cfs) 10.0 Direct Entry, Direct Subcatchment 4S: Basin B - Imp. Hydrograph NOAA 24-hr D ina 100-Year Rainfall=8.66" Runoff Area=4,648 sf__ Runoff Volume=0.075 af- Runoff Depth=8.42"_ Tc=10.0 min “CN=98 OR A GB WO TE 1 TO 1820 22 24 26 28 80-32 24 96 38 40.42 44 46 48 50 $2 54 $6 58 60 G2 64 68.68 7072 Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 _© 2021 HydroCAD Software Solutions LLC Time Precip. Excess hours) (inches) (inches) ) 0.00 NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 Hydrograph for Subcatchment 4S: Basin B - Imp. Runoff (cfs) 0.00 0.00 0.01 Time Precip. Excess Runoff