J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 2-Year_Future Rainfall=4.07", P2=4.07" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 84 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>1.63" Flow Length=298' Tc=12.4 min CN=WQ Runoff=0.98 cfs 0.089 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>1.87" Flow Length=85' Slope=0.1773 '/' Tc=7.0 min CN=WQ Runoff=0.31 cfs 0.023 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>1.75" Flow Length=66' Slope=0.2264 '/' Tc=5.2 min CN=WQ Runoff=0.18 cfs 0.013 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>1.60" Flow Length=82' Slope=0.1736 '/' Tc=6.8 min CN=WQ Runoff=0.43 cfs 0.031 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>2.40" Flow Length=239' Tc=13.4 min CN=WQ Runoff=0.20 cfs 0.020 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>1.66" Flow Length=116' Tc=10.2 min CN=WQ Runoff=0.30 cfs 0.025 af Reach 3R: TD-01 Avg. Flow Depth=0.06' Max Vel=3.25 fps Inflow=0.31 cfs 0.023 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=0.31 cfs 0.023 af Reach 4R: TD-02 Avg. Flow Depth=0.05' Max Vel=2.60 fps Inflow=0.18 cfs 0.013 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.18 cfs 0.013 af Reach 5R: TD-03 Avg. Flow Depth=0.14' Max Vel=1.99 fps Inflow=0.43 cfs 0.031 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=0.42 cfs 0.031 af Reach 6R: TD-04 Avg. Flow Depth=0.08' Max Vel=2.66 fps Inflow=0.30 cfs 0.025 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=0.30 cfs 0.025 af Pond 7P: O-1A Inflow=2.25 cfs 0.199 af Primary=2.25 cfs 0.199 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.46' Storage=22 cf Inflow=1.23 cfs 0.110 af Outflow=1.23 cfs 0.110 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.45' Storage=19 cf Inflow=1.36 cfs 0.122 af Outflow=1.36 cfs 0.122 af Pond 16P: SD-09, SD-10 Peak Elev=593.43' Storage=36 cf Inflow=1.76 cfs 0.154 af Outflow=1.76 cfs 0.153 af Pond 20P: SD-11, SD-12 Peak Elev=591.66' Storage=39

cfs 0.122 af Outflow=1.36 cfs 0.122 af Pond 16P: SD-09, SD-10 Peak Elev=593.43' Storage=36 cf Inflow=1.76 cfs 0.154 af Outflow=1.76 cfs 0.153 af Pond 20P: SD-11, SD-12 Peak Elev=591.66' Storage=39 cf Inflow=2.06 cfs 0.179 af Outflow=2.06 cfs 0.179 af Pond 23P: SD-01, SD-02 Peak Elev=597.55' Storage=92 cf Inflow=0.98 cfs 0.089 af Outflow=0.98 cfs 0.087 af