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 8/5/2022 Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC HydroCAD@ 10.20-24_ s/n. 08640 © 2021 HydroCAD Software Solutions LLC. Summary for Subcatchment 11S: Basin D - Imp. Hydrograph for Subcatchment 11S: Basin D - imp. Runoff = 0.15 cfs @ 12.17 hrs, Volume= 0.015 af, Depth= 3.21" Time Precip. Excess Runoff Time Precip. Excess Runoff. Routed to Pond 6P : Basin D we inches) ores) {ot hours) inches) inches) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs aaa oat 000 | S200 Sas NOAA 24-hr D 2-Year Rainfall=3.44" a Gos oee ll shoo Sa — 4.00 0.06 0.00 56.00 3.44 Area (sf)__CN Description 5.00 0.03 00 | 57.00 3.44 2,400 98 Unconnected pavement, HSG C 6.00 0.14 0.00 | 58.00 3.44 2,400 100.00% Impervious Area a 20 ey Pang 3a 2,400 10.00% Unconnected aa _ ooo }f) guso 344 Te Length Slope Velocity Capacity Des Hy nae corti] garg Sat {min)__(feet) _{fth) _(ftisec)_(cfs) 12:00 1.43 007 | 64.00 3.44 10.0 Direct Entry, Direct 13.00 2.32 0.02 65.00 3.44 14,00 2.53 0.01 66.00 3.44 catch : Basil . 15,00 2.66 0.01 67.00 3.44 oe seid nD -Imp. 16,00 276 0.01 68.00 3.44 Hydrograph 17.00 2.85 0.00 | 69.00 3.44 18.00 291 0.00 70.00 3.44 a (c=) 19.00 297 0.00 | 71.00 3.44 16 20.00 3.03 o.oo | 7200 3.44 01s NOAA 24-hr D 21.00 3.08 0.00 u " 22.00 3.42 0.00 oe 2-Year Rainfall=3.44' 33.00 347 0.00 =! 24,00 3.21 0.00 ow Runoff Area=2,400 sf eso el ‘aloo £23) Runoff Volume=0.015-af By _ one £ vod Runoff Depth=3.21" 28.00 321 0.00 | — 29.00 3.24 0.00 i ser Te=10.0 min 30.00 324 0.00 = 31.00 321 0,00 4 CN=98 32.00 3.21 0.00 33.00 3.21 0.00 34.00 3.21 0.00 35.00 3.21 0.00 36.00 324 0.00 37.00 3.21 0.00 38.00 3.21 0.00 39.00 3.21 0.00 BUR U 2 28902 9. Hoar ede 2k de Shed ex eT T2 bay Aa 00) 41.00 321 0.00 42.00 321 0.00 43,00 3.21 0,00 44,00 3.21 0.00 45.00 3.21 0.00 46.00 3.21 0.00 47.00 3.21 0.00 48.00 3.24 0.00 49,00 3.24 0.00 50.00 3.21 0.00 51.00 3.21 0.00