J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-2) West Orange HydroCAD_Pre NOAA 24-hr D 10-Year_Current Rainfall=5.37", P2=3.45" Prepared by Burns & McDonnell Printed 5/13/2024 Page 18 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 21S: PO-DA 1 Pond 21P: O-2 Runoff Area=52,807 sf 14.94% Impervious Runoff Depth>3.24" Flow Length=341' Tc=3.7 min CN=WQ Runoff=4.81 cfs 0.327 af Inflow=4.81 cfs 0.327 af Primary=4.81 cfs 0.327 af Total Runoff Area = 1.212 ac Runoff Volume = 0.327 af Average Runoff Depth = 3.24" 85.06% Pervious = 1.031 ac 14.94% Impervious = 0.181 ac