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 P: Summary for Subcatchment 4S: Basin B - Imp. Runoff = 0.45 cfs @_ 12.17 hrs, Volume= 0.044 af, Depth= 4.98" 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 Rainfail=5.22” 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) _(fuft)_(f/sec) (cls) 10.0 Direct Entry, Direct Subcatchment 4S: Basin B - imp. Hydrograph - NOAA 24-hr'D 10-Year Rainfall=5.22" Runoff Area=4,648 sf Runoff Volume=0.044 af Runoff Depth=4.98"_ Tc=10.0 uy CN=98 “Time (hours) 2022-07-28 Proposed Hydrology Prepared by Dynamic Engineering HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC (hours) (inches} 0.00 0.00 1,00 0.06 2.00 0.13 3.00 0.20 4.00 0.27 5.00 0.36 6.00 0.45 7.00 0.55 8.00 0.68 9.00 0.83 10,00 1.03, 11.00 1.36 12.00 2.50 13.00 3.86 14.00 4.19 1500 4,39 16.00 4.54 17.00 4.67 1800 4.7 19.00 4.86 20.00 4.95 21.00 5.02 22.00 5.09 23.00 5.16 24.00 5.22 25.00 §.22 26.00 5.22 27.00 5.22 28.00 5.22 29.00 5.22 30.00 5.22 31.00 5.22 32,00 5.22 33.00 5.22 34.00 5.22 35.00 5.22 36.00 5.22 37.00 5.22 38,00 5.22 39.00 5.22 40.00 5.22 41.00 5,22 4200 5.22 43.00 5.22 44.00 5.22 45.00 5.22 46.00 5,22 47.00 5.22 48.00 5.22 49.00 5.22 50.00 5.22 51.00 5.22 NOAA 24-hr D 10-Year Rainfall=5.22" Printed 8/5/2022 Page 64 inches) Hydrograph for Subcatchment 4S: Basin B - imp.