2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=6.22" Prepared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC 7 HydroCAD® 10.20-2d_ s/n 10_© 2021 HydroCAD Software Solutions LLC Pe Summary for Subcatchment 7S: Basin C - Imp. Hydrograph for Subcatchment 7S: Basin C - Imp. Runoff = — 0.45¢fs@_ 12.17 hrs, Volume= 0.044 af, Depth= 4.98" Time Precip, Excess Runoff Routed to Pond §P : Basin C urs) (inches) (inches 52.00 5.22 4.98 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0,00-72.00 hrs, dt= 0.05 hrs Sig eae! ae ea NOAA 24-hrD 10-Year Rainfall=5.22' outa aoe 488 _ Hi 56.00 5.22 4.98 0.00 Area (sf)__CN Description 87.00 5.22 4.98 0.00 4,635 98 Unconnected pavement, HSG C. 5800 5.22 4.98 0.00 4,635 100.00% Impervious Area 7 7 oa "i ea 3 oe 4,635 100.00% Unconnected oe 82 ie ace o a 22 4.98 0.00 Te Length Slope Velocity Capacity Description on 2 (min) (feet)__(fift)_(fsec)__ (cfs) eon 822488 000 10.0 Direct Entry, Direct 65.00 622 4.98 0.00 66,00 5.22 4.98 0.00 Subcatchment 7S: Basin C - Imp. 67.00 5.22 4.98 0.00 68.00 5.22 4.98 0.00 Hydrograph 69.00 522 4.98 0.00 70.00 522 4.98 0,00 Gea 71.00 5.22 4. 7 0.00 72.00 5.22 4 0.00 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=4,635 sf Runoff Volume=0.044 af Runoff Depth=4.98" Tc=10.0 min CN=98