2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD@ 10.20-24 sin 08640 © 2021 HytiroCAD Software Solutions LLC Page 127 Summary for Subcatchment 12S: Basin D - Perv. Runoff = 1.98 cfs @_ 12.17 hrs, Volume= 0.169 af, Depth= 5.52” Routed to Pond 6P : Basin D Runoff by SCS TR-20 method, UI NOAA 24-hr D 100-Year Rainfall: 'S, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs 3.66" Area (sf)__CN__Description 15,983 74 __>75% Grass cover, Good, HSG C 15,983 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) __(feet)__(f/ft)_(f’sec) (cfs) 10.0 Direct Entry, Direct Subcatchment 12S: Basin D - Perv. Hydrograph 4 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=15,983 sf Runoff Volume=0.169 af Runoff Depth=5.52" Tc=10.0 min CN=74 Flow (ets) DAE STO IE IA TO TOH0 22 282080 BEM BP 940 24k 6 8 80 2 80 9 0 62 O46 087 72 2022-07-28 Proposed Hydrology NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Dynamic Engineering Printed 8/5/2022 HydroCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC. Page 128 Hydrograph for Subcatchment 12S: Basin D - Perv. Time Precip. Excess Runoff | Time Precip. Excess Runoff (hours) (inches) (inches) (hours) (inches) (inches) (fs) 0.00 0.00 0.00 0.00 | 52.00 866 5.52 0.00 4.00 0.10 0.00 0.00 | 5300 866 5.52 0,00 200 0.21 0.00 0.00 | 5400 866 5.52 0.00 3.00 0.33 0.00 0.00 | 55.00 866 5.52 0.00 4.00 045 0.00 0.00 | 56.00 866 5.52 0.00 5.00 0.59 (0.00 0.00 | 57.00 866 5.52 0.00 6.00 0.74 0,00 0.00 | 5800 865 5.52 0.00 700 0.91 = 0.01 0.01 | 5900 866 552 0.00 800 1.12 0.05 0.02 | 60.00 866 5.52 0.00 900 1.37) 0.11 0.03 | 61.00 866 552 0.00 40.00 1.72 0.23 0.08 | 6200 866 5.52 0.00 11.00 225 0.47 0.12 | 63.00 866 5.52 0.00 1200 415 1.71 oss | 6400 866 5.52 0.00 1300 641 353 028 | 65.00 866 5.52 0.00 14.00 694 3.99 0.14 | 66.00 866 5.52 0.00 15.00 7.29 4.29 0.10 | 67.00 866 5.52 0.00 1600 7.54 4.51 0.08 | 6800 866 5.52 0.00 17.00 775 4.70 ao7 | 6900 866 5.52 0.00 1800 7.92 4.85 0.05 | 70.00 866 5.52 0.00 19.00 8.07 4.99 0.05 | 74.00 866 5.52 0.00 20.00 821 5.11 0.04 | 7200 866 5.52 0.00 21.00 8.33 5.23 0.04 2200 845 5.33 0.04 23.00 856 5.43 0.04 24.00 866 5.52 0.03 25.00 866 5.52 0.00 26.00 866 © 5.52 0.00 27.00 8.66 5.52 0.00 28.00 866 5.52 0.00 29.00 866 5.52 0.00 30.00 866 5.52 0.00 31.00 865 5.52 0.00 3200 865 5.52

.04 23.00 856 5.43 0.04 24.00 866 5.52 0.03 25.00 866 5.52 0.00 26.00 866 © 5.52 0.00 27.00 8.66 5.52 0.00 28.00 866 5.52 0.00 29.00 866 5.52 0.00 30.00 866 5.52 0.00 31.00 865 5.52 0.00 3200 865 5.52 0.00 33.00 866 5.52 0.00 34.00 8.66 5.52 0.00 35.00 8.66 5.52 0.00 36.00 8.66 5.52 0.00 37.00 8.66 5.52 0.00 38.00 866 5.52 0.00 39.00 8.66 5.52 0.00 40.00 866 5.52 0.00 41.00 866 5.52 0.00 4200 866 5.52 0.00 43.00 866 5.52 0,00 44.00 866 5.52 0.00 45.00 866 5.52 0.00 46.00 866 5.52 0.00 47.00 866 5.52 0.00 48,00 866 5.52 0.00 49.00 866 5.62 0.00 50.00 8.66 5.52 0.00 51.00 868 5.52 0.00