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 4 HydroCAD® 10.20-2d_ s/n 08640 © 2021 iroCAD Software Solutions LLC Hy "AD® 10.20-2d_s/n 08640 © 2021 H) Summary for Subcatchment 5S: Basin B - Perv. Hydrograph for Subcatchment 5S: Basin B - Perv. Runoff == 0.84 cfs @ 12.18 hrs, Volume= 0,072 af, Depth= 1.20" Time Precip. Excess Runoff Time Precip. Excess Runoff Routed to Pond 4P : Basin B hours) (inches) (inches) (cfs) | (hours) (inches) (inches) (cfs) 00 0.00. 0.00 0.00 1.20 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs aay ol oo Hea ey NOAA 24-hr D 2-Year Rainfall=3.44" pat) ao Aa Han Wan .00 0.00 1.20 0.00 _ 0.18 0.00 00 1.20 0.00 Area (sf) __CN__Description Cae aon ia aa 31,571 74 _>75% Grass cover, Good, HSG C 023 0.00 0.00 120 0.09 31,571 7100.00% Pervious Area 0.36 0.00 0.00 1.20 0.00 0.45 0.00 0.00 1.20 0.00 Te Length Slope Velocity Capacity Description ozs] 0.00, 0.00 1.20 0.00 (min) (feet) __(ftft)_(fusec) __(cfs) ny b02 120 00 10.0 Direct Entry, Direct 1.65 0.20 0.30 1.20 0.00 2.55 0.63 0.15 1.20 0.00 Subcatchment 5S: Basin B - Perv. 276 0.76 0,08 1.20 0.00 2.89 0.84 0.05 1.20 0.00 hydroarent 299 0.90 0.04 1.20 0.00 3.08 0.96 0.04 1.20 0,00 oof t=) 315 1.00 0.03 1.20 0.00 085 3200 1 0.03 420 0.00 ‘ta NOAA 24-hrD 326 1.08 0.03 4.20 0.00 7 i" i" 3.31 4.11 0.02 vi -2-Year Rainfall=3.44' 336144 002 oss Runoff Area=31,571 sf ee na a Runoff Volume=0.072 af 344 1.20 0.00 Fa 2 - 344 1.20 0.00 3 on Runoff Depth=1.20 3441.20 0.00 r 7 3.44 1.20 0.00 Eon] . Tc=10.0 min, gual L120 0.00 038: CN=74 344 1.20 0.00 03: 3.44 4.20 0.00 02s 344 120 0.09 02: 3.44 1.20 0.00 6: 3.44 1.20 0.00 at 344 1.20 0.00 oos4 3.44 4.20 0.00 Ft 344 1.20 0.00 0-2-4 8 8 1021 8 1820 22 24 26 2B 30 32 34 35 38 40 42 44 46 48 50 52 54 96 58 60 62 6 65 68 7072 344 1.20 0.00 “ime (hous) 344 1.20 0.00 344 1.20 0.00 3441.20 0.00 344 1,20 0.00 3.44 4,20 0.00 3.44 1.20 0.00 3.44 1.20 0.00 3.44 1.20 0.00 3.44 1.20 0.00 3.44 1.20 0.00 3.44 1.20 0,00 344 1.20 0.00 3.44 1.20 0.00