J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1) 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 24S: PO-DA 7 Pond 22P: O-1 Runoff Area=73,407 sf 5.92% Impervious Runoff Depth>1.70" Flow Length=439' Tc=12.1 min CN=WQ Runoff=2.66 cfs 0.239 af Inflow=2.66 cfs 0.239 af Primary=2.66 cfs 0.239 af Total Runoff Area = 1.685 ac Runoff Volume = 0.239 af Average Runoff Depth = 1.70" 94.08% Pervious = 1.585 ac 5.92% Impervious = 0.100 ac