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® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: Basin C - Perv. Runoff = 1.79 cis @ 12.18 hrs, Volume= 0.151 af, Depth= 2.54" Routed to Pond 5P : Basin G 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)__CN__Description 31,149 _74_>75% Grass cover, Good, HSG C 31,149 7100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(fv/t)_(flsec)___(ofs) 10.0 Direct Entry, Direct Subcatchment 8S: Basin C - Perv. Hydrograph * =) NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=31,149 sf Runoff Volume=0.151 af Runoff Depth=2.54" Tc=10.0 min CN=74 Flow (cfs) o O°2 AG 8 NOTE Te We TORO a2 BO 203032 34D 8.40 ato 4 80 2 F098 0 020465 687072 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=6.22" Prepared by Dynamic Engineering HydroCAD® 10.20-2d s/n 08640_© 2021 HydroCAD Software Solutions LLC Printed 8/5/2022 Page 70 Hydrograph for Subcatchment 8S: Basin C - Perv. Runoff (cfs)