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 HydroCy 410.20-2d sin 08640 © 2021 Summary for Subcatchment 11S: Basin D - Imp. Runoff = 0.39 cfs @_ 12.17 hrs, Volume= 0.039 af, Depth= 8.42" Routed to Pond 6P : Basin D 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 2,400 98 _Unconnected pavement, HSG C_ 2,400 10.00% Impervious Area 2,400 10.00% Unconnected Te Length Slope Velocity Capacity Description (min) _(feet)__(ft)_(f/sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 11S: Basin D - Imp. Hydrograph NOAA 24-hr D-. 100-Year Rainfall=8.66" _Runoff Area=2,400 sf Runoff Volume=0.039 af Runoff Depth=8.42"— Tc=10.0 min 010] CN=98 O26 OB TO 1 14 TO IOI 22 WN 26 28 20-32 34 38 3B A042 44 46 48 50 52 54 96 58 60 G2 66 66.68 70 72 Time (hours) 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 sin 08640 © 2021 HydroCAD Software Solutions LLC Page 126 inches) Hydrograph for Subcatchment 11S: Basin D - Imp. Runoff