J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-2) West Orange HydroCAD_Post NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 12 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>1.71" Flow Length=452' Tc=11.6 min CN=WQ Runoff=2.06 cfs 0.188 af Inflow=2.06 cfs 0.188 af Primary=2.06 cfs 0.188 af Total Runoff Area = 1.319 ac Runoff Volume = 0.188 af Average Runoff Depth = 1.71" 84.08% Pervious = 1.109 ac 15.92% Impervious = 0.210 ac