2022 08 Drainage Report

2022-07-21 Existing Hydrology NOAA 24-hr D 2-Year Rainfall=3.44" 2022-07-21 Existing Hydrology NOAA 24-hr D10-Year Rainfall=5.22" Pronared by Dynamic Engineering Printed 9/5/2022 Prepared by Dynamic Engineering Printed 8/5/2022 roCAD® 10.20-2d sin 08640 © 2021 HydroCAD Software Solutions LLC 4 HydroCAD® 10.20-2d_ s/n 08640 © 2021 HydroCAD Software Solutions LLC 44 Hydrograph for Link 2L: Mt. Pleasant Ave. Time span=0,00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Time Inflow Elevation Primary | Time Inflow Elevation Primary Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method (hours) ___(efs)__(feet)_(efs) | (hours (ofs)__ (feet 0.00 x r 0.00 | 52.00 0.00 0.00 ‘Subcatchment 1S: Mt. Pleasant Ave. - Imp. Runoff Area=2,696 sf 10.00% Impervious Runoff Depth=4.98" 4.00 0.00 | 53.00 0.00 0.00 Flow Length=330' Tc=23.5 min CN=98 Runoff=0.19 cfs 0.026 af 2.00 0.00 | 54.00 0.00 0.00 au 5 “4 Pad 7 7 $ oy Subcatchment 3S: Mt. Pleasant Ave. - Perv. Runoff Area=158,870 sf 0.00% Impervious Runoff Depth=2.20" 5.00 0.00 57.00 0.00 0.00 Flow Length=245' Tc=24.8 min CN=70 Runoff=5.39 cfs 0.669 af ea oe ee ry Link 2L: Mt. Pleasant Ave. Inflow=5.58 cfs 0.695 af 8.00 0.00 60.00 0.00 0.00 Primary=5.58 cfs 0.695 af 3.00 o.01 | 61.00 0.00 0.00 10.00 01 | 6200 0.00 0.00 Total Runoff Area = 3.709 ac_ Runoff Volume = 0.695 af Average Runoff Depth = 2.25" 11.00 0.01 | 63.00 0.00 0.00 98.33% Pervious = 3.647 ac 1.67% Impervious = 0.062 ac 12.00 0.46 64.00 0.00 0.00 13,00 026 | 65.00 0.00 0.00 14.00 0.37 66.00 0.00 0.00 15.00 0.26 67.00 0.00 0.00 16.00 0.20 | 68,00 000 0.00 47,00 0.18 69.00 0.00 0.00 18.00 0.14 70.00 0.00 0.00 19.00 0.13 71.00 0.00 0.00 20.00 0.12 72,00 0.00 0.00 21.00 ont 22.00 0.11 23,00 0.10 24.00 0.09 25.00 0,00 26.00 0.00 27.00 0.00 28.00 0.00 29,00 0.00 30.00 0.00 31.00 0.00 32.00 0.00 33.00 0.00 34.00 0.00 35.00 0.00 36.00 0.00 37.00 0,00 38.00 0.00 39,00 0.00 40.00 0.00 41.00 0.00 42.00 0.00 43.00 0.00 44.00 0.00 45.00 0.00 46.00 0.00 47.00 0.00 48.00 0.00 49.00 0.00 50.00 0.00 51,00 0.00