2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 roCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC 4 HydroCAD® 10.20-2d sin 08640_© 2021 HydroCAD Software Solutions LLC P: Summary for Subcatchment 9S; Mt. Pleasant Ave Undetained - Imp. Hydrograph for Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Runoff = 0.11 cfs @ 12.17 hrs, Volume= 0.010 af, Depth= 3.21" Time Precip. Excess Runoff | Time Precip. Excess Runoff Routed to Link 3L : Mt. Pleasant Ave - Undetained Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= NOAA 24-hr D 2-Year Rainfall=3. .05 hrs, Area (sf)_CN__Description 7,085 98 —Unconnected pavement, HSG C 621__98_Unconnected pavement, HSG D 1,706 98 Weighted Average 4,706 100.00% Impervious Area 1,706 100.00% Unconnected Te Length Slope Velocity Capacity Description (min) (feet) __(ft/ft)_(f'sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 9S: Mt. Pleasant Ave Undetained - Imp. Hydrograph_ one pa) ag _ NOAA 24-hr_D 0008] 2-Year Rainfall=3.44" oes} Runoff Area=1,706 sf aors| Runoff Volume=0.010 af Toneed Runoff Depth=3.21" tee Tc=10.0 min 0,085. CN=98 of 02 4 OO TO TE 10 W180 22 24 20 28 30 32 24 96 38 40-42 44 46 48 50 £2 54 58 $3 60 G2 GA 68.68 7072 ‘Time (hours)