J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) 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 Runoff Area=28,575 sf 0.00% Impervious Runoff Depth=0.07" Flow Length=298' Tc=13.4 min CN=WQ Runoff=0.08 cfs 0.004 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth=0.13" Flow Length=85' Slope=0.1773 '/' Tc=7.6 min CN=WQ Runoff=0.04 cfs 0.002 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth=0.10" Flow Length=66' Slope=0.2264 '/' Tc=5.6 min CN=WQ Runoff=0.02 cfs 0.001 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth=0.07" Flow Length=82' Slope=0.1736 '/' Tc=7.5 min CN=WQ Runoff=0.03 cfs 0.001 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth=0.39" Flow Length=239' Tc=14.4 min CN=WQ Runoff=0.08 cfs 0.003 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth=0.08" Flow Length=116' Tc=11.1 min CN=WQ Runoff=0.03 cfs 0.001 af Reach 3R: TD-01 Avg. Flow Depth=0.02' Max Vel=1.55 fps Inflow=0.04 cfs 0.002 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=0.04 cfs 0.002 af Reach 4R: TD-02 Avg. Flow Depth=0.01' Max Vel=1.24 fps Inflow=0.02 cfs 0.001 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.02 cfs 0.001 af Reach 5R: TD-03 Avg. Flow Depth=0.03' Max Vel=0.72 fps Inflow=0.03 cfs 0.001 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=0.03 cfs 0.001 af Reach 6R: TD-04 Avg. Flow Depth=0.02' Max Vel=1.04 fps Inflow=0.03 cfs 0.001 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=0.03 cfs 0.001 af Pond 7P: O-1A Inflow=0.18 cfs 0.010 af Primary=0.18 cfs 0.010 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.07' Storage=5 cf Inflow=0.07 cfs 0.004 af Outflow=0.07 cfs 0.004 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.05' Storage=2 cf Inflow=0.08 cfs 0.004 af Outflow=0.08 cfs 0.004 af Pond 16P: SD-09, SD-10 Peak Elev=592.96' Storage=7 cf Inflow=0.10 cfs 0.006 af Outflow=0.10 cfs 0.006 af Pond 20P: SD-11, SD-12 Peak Elev=591.14' Storage=12 cf Inflow=0.11

utflow=0.08 cfs 0.004 af Pond 16P: SD-09, SD-10 Peak Elev=592.96' Storage=7 cf Inflow=0.10 cfs 0.006 af Outflow=0.10 cfs 0.006 af Pond 20P: SD-11, SD-12 Peak Elev=591.14' Storage=12 cf Inflow=0.11 cfs 0.007 af Outflow=0.11 cfs 0.007 af Pond 23P: SD-01, SD-02 Peak Elev=597.15' Storage=85 cf Inflow=0.08 cfs 0.004 af Outflow=0.05 cfs 0.002 af