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 8/5/2022 HydroCAD® 10.20-2d s/n 08640 © 2021 HydroCAD Software Solutions LLC P: HydroCAD® 10.20-24 s/n 08640 © 2021 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment 1S: Basin A - Imp. Hydrograph for Subcatchment 1S: Basin A - Imp. Runoff = 0.30 cfs @ 12.17 hrs, Volume= 0.029 af, Depth= 3.21" Time Precip. Excess Runoff Time Precip. Excess Runoff Routed to Pond 3P : Basin A hours) (inches) (inches) _(cfs) 0.00 . 0.00 0.00 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0,00-72.00 hrs, dt= 0.05 hrs nod aul 0.00 NOAA 24-hr D 2-Year Rainfall=3.44" : i be 3.00 0.03 0.00 as 4.00 .( 0.00 Area(sf)__CN Description ao oe (wo 4,655 98 _Unconnected pavement, HSG C. 6.00 014 0.01 4,655 100.00% Impervious Area 7.00 0.20 0.01 4,655 4100.00% Unconnected 8.00 027 0.01 9.00 036 0.01 Tc Length Slope Velocity Capacity Description 10,00 . 4.02 (min) (feet) _(ftt)_(fusec)_" (cfs) HS Waa aae 10.0 Direct Entry, Direct 43.00 232 0.04 14,00 2.53 0.02 Subcatchment 1S: Basin A - Imp. 15.00 2.66 0.01 7 P. 16,00 2.76 0.01 Hydrograph 17.00 2.85 0.01 18,00 291 0.01 032: (Ci | 49.00 297 0.01 20.00 3.03 0.01 cm NOAA 24-hr D 21.00 3.08 0.0% A = i" (22.00 . 1.00 oa 2-Year Rainfall=3.44' 200 317 eo 026 = 24.00 3.24 0.00 be Runoff Area=4,655 sf 35.00 a1 6.00 oa: Runoff Volume=0.029 af 26.00 3.24 0.00 7 7 27.00 321 0.00 Boe Runoff Depth=3.21 28.00 3.21 0,00 010] 3 - 29.00 321 0.00 Ee Te=10.0 min 30.00 324 0.00 =! 31.00 3.21 0.00 sa CN=98 32.00 3.21 0.00 33.00 321 0.00 0 34.00 321 0.00 a 35.00 3.21 0.00 0.04: 36.00 3.21 0.00 002 37.00 3.21 0.00 38.00 3.21 0.00 39.00 3.21 0.00 OT CIO OH Ha 2283032 80 so aE Had 1050 S21 8802S OBS 7072 39.00 7 aed 41.00 3.21 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 3.21 0.00 49.00 3.21 0.00 50.00 3.21 0.00 51.00 321 0.00