2022 08 Drainage Report

NOAA 24-hr D 100-Year Rainfall=8.66" Printed 9/5/2022 Page 119 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Basin C - Perv. Runoff = 3.87 cfs @_12.17 hrs, Volume= Routed to Pond 5P : Basin C 0.329 af, Depih= 5.52" 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 Rainfali=8. Area (sf)__CN Description 31,149 74__>75% Grass cover, Good, HSG C 31,149 400.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(fvft)_(fusec)__(ofs) 10.0 Direct Entry, Direct Subcatchment 8S: Basin C - Perv. Hydrograph NOAA 24-hr D 100-Year Rainfall=8.66" af Runoff Area=31,149 sf Runoff Volume=0.329 af Runoff Depth=5.52" . Tc=10.0 min Flow (cs) CN=74 246 8 Wiz 14 V6 1020 22 24 26 28 30 32 34 36 38 40 42 44 46 48 60 52 54 56 56 60 62 G4 60 68 70 72 “Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC Time Precip. Excess NOAA 24-hr D 100-Year Rainfall=8.66" Printed 8/5/2022 Hydrograph for Subcatchment 8S: Basin C - Perv. Runoff | Time Precip. Excess Runoff