J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) 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 7 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 5S: PO-DA C Runoff Area=24,698 sf 17.46% Impervious Runoff Depth=0.42" Flow Length=164' Tc=18.6 min CN=WQ Runoff=0.44 cfs 0.020 af Subcatchment 7S: PO-DA E Runoff Area=15,246 sf 31.71% Impervious Runoff Depth=0.52" Flow Length=175' Tc=15.6 min CN=WQ Runoff=0.37 cfs 0.015 af Subcatchment 9S: PO-DA G Runoff Area=16,902 sf 28.87% Impervious Runoff Depth=0.49" Flow Length=175' Tc=23.4 min CN=WQ Runoff=0.31 cfs 0.016 af Subcatchment 11S: PO-DA I Runoff Area=10,507 sf 27.64% Impervious Runoff Depth=0.48" Flow Length=120' Tc=6.5 min CN=WQ Runoff=0.33 cfs 0.010 af Runoff Area=13,809 sf 38.48% Impervious Runoff Depth=0.55" Flow Length=96' Slope=0.0336 '/' Tc=5.4 min CN=WQ Runoff=0.50 cfs 0.015 af Subcatchment 12S: PO-DA J Pond 1P: BR-01 Peak Elev=596.68' Storage=487 cf Inflow=0.44 cfs 0.020 af Outflow=0.12 cfs 0.020 af Pond 2P: BR-02 Peak Elev=598.55' Storage=357 cf Inflow=0.37 cfs 0.015 af Outflow=0.11 cfs 0.015 af Pond 3P: BR-03 Peak Elev=594.44' Storage=405 cf Inflow=0.31 cfs 0.016 af Outflow=0.10 cfs 0.016 af Pond 5P: BR-05 Peak Elev=594.16' Storage=233 cf Inflow=0.33 cfs 0.010 af Outflow=0.08 cfs 0.010 af Pond 6P: BR-04 Peak Elev=595.04' Storage=410 cf Inflow=0.50 cfs 0.015 af Outflow=0.08 cfs 0.014 af Pond 8P: O-1B Inflow=0.48 cfs 0.074 af Primary=0.48 cfs 0.074 af Pond 13P: SD-25, SD-26 Peak Elev=580.74' Storage=0.000 af Inflow=0.48 cfs 0.074 af 18.0" Round Culvert n=0.011 L=29.4' S=0.0099 '/' Outflow=0.48 cfs 0.074 af Pond 14P: SD-24 Peak Elev=585.17' Storage=0.000 af Inflow=0.41 cfs 0.065 af Outflow=0.41 cfs 0.065 af Pond 17P: SD-23 Peak Elev=587.06' Storage=0.000 af Inflow=0.33 cfs 0.050 af Outflow=0.33 cfs 0.050 af Pond 18P: SD-22 Peak Elev=588.69' Storage=0.000 af Inflow=0.23 cfs 0.035 af Outflow=0.23 cfs 0.035 af Pond 19P: SD-21 Peak Elev=590.78' Storage=0.000 af Inflow=0.12 cfs 0.020 af Outflow=0.12 cfs 0.020 af