J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-2) 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 16S: PO-DA N Pond 25P: O-2 Runoff Area=57,457 sf 15.92% Impervious Runoff Depth=0.28" Flow Length=452' Tc=11.6 min CN=WQ Runoff=0.79 cfs 0.031 af Inflow=0.79 cfs 0.031 af Primary=0.79 cfs 0.031 af Total Runoff Area = 1.319 ac Runoff Volume = 0.031 af Average Runoff Depth = 0.28" 84.08% Pervious = 1.109 ac 15.92% Impervious = 0.210 ac