J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-AquaShield) West Orange HydroCAD_Pre NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" Prepared by Burns & McDonnell Printed 5/13/2024 Page 6 HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Time span=0.00-24.00 hrs, dt=0.0100 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-Q Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment 22S: PO-DA 6 Runoff Area=96,853 sf 19.09% Impervious Runoff Depth>2.04" Flow Length=491' Tc=18.1 min CN=WQ Runoff=3.47 cfs 0.377 af Subcatchment 23S: PO-DA 8 Runoff Area=16,786 sf 69.53% Impervious Runoff Depth>2.83" Flow Length=178' Tc=8.1 min CN=WQ Runoff=1.07 cfs 0.091 af Pond 20P: O-AquaShield Inflow=4.09 cfs 0.468 af Primary=4.09 cfs 0.468 af Total Runoff Area = 2.609 ac Runoff Volume = 0.468 af Average Runoff Depth = 2.15" 73.46% Pervious = 1.917 ac 26.54% Impervious = 0.692 ac