2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-24_ sin 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 5S: Basin B - Perv. Runoff = 4,82 cfs @ 12.18 hrs, Volume= 0.153 af, Depth= 2.54" 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 10-Year Rainfall=5.22" Area (sf) 31,571 74 _>75% Grass cover, Good, HSG C 31,571 10.00% Pervious Area Te Length Slope Velocity Capacity Descri (min) (feet) __(ft/ft)__ (ft/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 5S: Basin B - Perv. Hydrograph NOAA 24-hr D 10-Year Rainfall=5.22” Runoff Area=31,571 sf Runoff Volume=0.153 af Runoff Depth=2.54" Tc=10.0 min CN=74 Flow (cfs) ID V2 14 TO 1020 22 24 26 28 30 32 34 36 38 40 42.44 46 48.50 52 64 6 98 GO 62 C4 66 68.70 72 ‘Time (hours) 2022-07-28 Proposed Hyd! gy NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d_s/n 08640 _© 2021 HydroCAD Software Solutions LLC Page 66 Time Precip. Excess hours) (inches) (inches) Hydrograph for Subcatchment 5S: Basin B - Perv. Time Precip. Excess Runoff