2022 08 Drainage Report

2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 9/5/2022 HydroCAD® 10.20-2d_s/n 08640 © 2021 HydroCAD Software Solutions LLC ‘Summary for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Runoff = 1.07 cfs @ 12.18 hrs, Volume= 0.092 af, Depth= 1.20" Routed to Link 3L : Mt. Pieasant Ave - Undetained Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) CN Description 38,200 74 ©>75% Grass cover, Good, HSG C 2.119 80 __>75% Grass cover, Good, HSG D 40,319 74 Weighted Average 40,319 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) _(fvft)_(f/sec) (cs) 10.0 Direct Entry, Direct Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Hydrograph NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=40,319 sf Runoff Volume=0.092 af Runoff Depth=1.20" Tc=10.0 min CN=74 Flow (cfs) of (0-2 4 6 B 101214 10 1820 22 24 26 28 90 32.34 35 28.40 42 44 45 48 SO 52.5% 90 $5.60 O2 64 65 08 70 72 “Time (hours) 2022-07-28 Proposed Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Dynamic Engineering Printed 8/5/2022 10.20-2d_sin 08640 © 2021 HydroCAD Software Solutions LLC Pi Hydrograph for Subcatchment 10S: Mt. Pleasant Ave Undetained - Perv. Time Precip. Excess Runoff | Time Precip. Excess Runoff hours) (inches) (inches) (cfs) | (hours) (inches) (inches) (fs) 0.00 0.00 0.00 | 5200 344 1.20 0.00 1.00 0.00 0.00 | 53.00 344 1.20 0.00 2.00 0.00 0.00 | 54.00 344 1.20 0.00 3.00 0.00 0.00 | 55.00 344 1.20 0.00 4.00 0.00 0.00 | 56.00 344 1.20 0.00 5.00 0.00 0,00 | 57.00 344 1.20 0.00 6.00 0.00 0.00 | 5800 344 1.20 0.00 7.00 0.00 0.00 | 5900 344 1.20 0.00 8.00 0.00 0.00 | 60.00 344 1.20 0,00 9.00 0.00 0.00 | 6100 344 1.20 0.00 10.00 0.00 o.oo | 6200 344 1.20 0.00 11.00 0.01 a.02 | 6300 344 1.20 0.00 12.00 0.20 o39 | 64.00 344 1.20 0.00 13.00 0.63, 019 | 65.00 344 1.20 0.00 14,00 0.76 0.10 | 66.00 344 1.20 0.00 15.00 0.84 0.07 | 67.00 344 1.20 0.00 16.00 0.90 0.06 | 68.00 344 1.20 0.00 17.00 0.96 0.05 | 69.00 344 1.20 0.00 18.00 1.00 0.04 | 70.00 3.44 © 1.20 0.00 49.00 1,04 0.04 | 71.00 344 © 1.20 0.00 20.00 1.08 0.03 | 7200 344 1.20 0.00 21.00 411 0.03 22.00 114 0.03 23,00 17 0.03 24,00 1.20 0.02, 25.00 1.20 0.00 26.00 4.20 0.00 27.00 1.20 0.00 28.00 4.20 9.00 29.00 1.20 0.00 30.00 1.20 0.00 31.00 1.20

0 1.08 0.03 | 7200 344 1.20 0.00 21.00 411 0.03 22.00 114 0.03 23,00 17 0.03 24,00 1.20 0.02, 25.00 1.20 0.00 26.00 4.20 0.00 27.00 1.20 0.00 28.00 4.20 9.00 29.00 1.20 0.00 30.00 1.20 0.00 31.00 1.20 0.00 32.00 4.20 0.00 33.00 1.20 0.00 34,00 1.20 0.00 35.00 1.20 0.00 36.00 4.20 0.00 37.00 4.20 0,00 38.00 1.20 0.00 39.00 1.20 0.00 40.00 1.20 0.00 41.00 4.20 0.00 42.00 1.20 0.00 43.00 1.20 0.00 44.00 1.20 0.00 45.00 4.20 0.00 46.00 1.20 0.00 47.00 1.20 0.00 48.00 1.20 0.00 49,00 1.20 0.00 50.00 4.20 0.00 51.00 41.20 0.00