2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hrD 10-Year Rainfall=5.22" 2022-07-28 Proposed Hydrology NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 8/5/2022 Prepared by Dynamic Engineering Printed 8/6/2022 HydroCAD@ 10.20-2d_ s/n 08640_© 2021 HydroCAD Software Solutions LLC. P: wa HydroCAD® 10.20-2d_s/n 08640_© 2021 HydroCAD Software Solutions LLC Summary for Subcatchment 12S: Basin D - Perv. Hydrograph for Subcatchment 12S: Basin D - Perv. Runoff = = 0.92 cis @ 12.18 hrs, Volume= 0.078 af, Depth= 2.54" Time Precip. Excess Runoff Time Precip, Excess Runoff Routed to Pond 6P : Basin D hours) (inches) (inches) (cfs) | (hours) (inches) (inches) 0.00 0.00 0.00 52.00 5.22 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs mee 0.00 0.00 |) 5300 5.22 ed NOAA 24-hr D 10-Year Rainfall=5.22" 2.00 0.00 G00) || S400 5.22 one 3.00 0.00 0.00 55.00 5.22 0.00 voli 4.00 0.00 0.00 | 56.00 5.22 0.00 Area (sf)__CN Description 5.00 0.00 00 | 57.00 5.22 0.00 15,983 74 _>75% Grass cover, Good, HSG C 6.00 0.00 0.00 | 5800 5.22 0.00 15,983 7100.00% Pervious Area 7.00 0.00 000 | sa00 5.22 0,00 8.00 0,00 0.00 60.00 5,22 0.00 Te Length Slope Velocity Capacity Description 9.00 0.00 G00 | 81.00 5.22 9.00 {rin)__(feet) _(t)_{fusee)_ (ef too ora dor | 6300 Sa8 o.99 10.0 Direct Entry, Direct 12.00 061 038 | 64.00 5.22 0.00 13,00 1.50 0.146 65.00 5.22 0,00 Subcatchment 12S: Basin D - Perv. 14.00 1.73 0,07 66.00 5.22 0.00 15.00 1.89 0.05 67.00 5.22 0.00 Hydrograph 16.00 2.01 0.04 | 68.00 5.22 0.00 17.00 2.10 0.03 | 69.00 5.22 0.00 * 18.00 2.19 0.03 | 70.00 5.22 0.00 19.00 2.26 0.03 | 74.00 5.22 0.00 NOAA 24-hr D 20.00 2332 002 | 7200 5.22 0.00 infall=5.22" 21.00 2:38 0.02 10-Year Rainfall=5.22 22.00 344 0.02 =" 23,00 249 0.02 Runoff Area=15,983 sf oon 2a oe Runoff Volume=0.078 af 25.00 254 0.00 z 26.00 0.00 g Runoff Depth=2.54' 27.00 284 0.00 2 7 28.00 2.54 0.09 Ed Tc=10.0 min Erg ou 0.00 CN=74 30,00 2.54 0.00 31.00 2.54 0.00 32,00 2.54 0.00 33.00 2.54 0.00 34.00 2.54 0.00 35.00 2.54 0.00 36.00 254 0.00 of 37.00 2.54 0.00 O24 6 8 WIT 10 1820 22 24 20 28 30 32 34 36 38 40 42 44 46 48 20 52 54 50 8.60 62 64 65 08 70 72 38.00 2.54 0.00 ‘Tine (hours) 39.00 2.54 0.00 40.00 2.54 0.00 41.00 2.54 0.00 42.00 2.54 0.00 43.00 2.54 0.09 44.00 2.54 0.00 45.00 2.54 0.00 46,00 2.54 0.00 47.00 2.54 0.00 48.00 2.54 0.00 49.00 2.54 0.00 50.00

0.00 ‘Tine (hours) 39.00 2.54 0.00 40.00 2.54 0.00 41.00 2.54 0.00 42.00 2.54 0.00 43.00 2.54 0.09 44.00 2.54 0.00 45.00 2.54 0.00 46,00 2.54 0.00 47.00 2.54 0.00 48.00 2.54 0.00 49.00 2.54 0.00 50.00 2.54 0.00 51.00 2.54 0.00