J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-AquaShield) West Orange HydroCAD_Post NJ DEP 2-hr WQ Rainfall=1.25", P2=3.42" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 6 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 3S: PO-DA A Runoff Area=78,287 sf 12.62% Impervious Runoff Depth=0.33" Flow Length=491' Tc=18.2 min CN=WQ Runoff=1.06 cfs 0.049 af Runoff Area=18,459 sf 73.95% Impervious Runoff Depth=0.84" Flow Length=180' Slope=0.0160 '/' Tc=8.0 min CN=WQ Runoff=0.96 cfs 0.030 af Subcatchment 15S: PO-DA M Pond 4P: AquaShield Inflow=1.58 cfs 0.079 af Primary=1.58 cfs 0.079 af Total Runoff Area = 2.221 ac Runoff Volume = 0.079 af Average Runoff Depth = 0.42" 75.68% Pervious = 1.681 ac 24.32% Impervious = 0.540 ac