J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 240 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>8.16" Flow Length=298' Tc=12.4 min CN=WQ Runoff=4.89 cfs 0.446 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>8.62" Flow Length=85' Slope=0.1773 '/' Tc=7.0 min CN=WQ Runoff=1.38 cfs 0.106 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>8.39" Flow Length=66' Slope=0.2264 '/' Tc=5.2 min CN=WQ Runoff=0.84 cfs 0.060 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>8.11" Flow Length=82' Slope=0.1736 '/' Tc=6.8 min CN=WQ Runoff=2.13 cfs 0.160 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>9.30" Flow Length=239' Tc=13.4 min CN=WQ Runoff=0.79 cfs 0.078 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>8.22" Flow Length=116' Tc=10.2 min CN=WQ Runoff=1.47 cfs 0.125 af Reach 3R: TD-01 Avg. Flow Depth=0.16' Max Vel=5.60 fps Inflow=1.38 cfs 0.106 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=1.37 cfs 0.106 af Reach 4R: TD-02 Avg. Flow Depth=0.12' Max Vel=4.60 fps Inflow=0.84 cfs 0.060 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.84 cfs 0.060 af Reach 5R: TD-03 Avg. Flow Depth=0.41' Max Vel=3.41 fps Inflow=2.13 cfs 0.160 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=2.11 cfs 0.159 af Reach 6R: TD-04 Avg. Flow Depth=0.21' Max Vel=4.72 fps Inflow=1.47 cfs 0.125 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=1.47 cfs 0.125 af Pond 7P: O-1A Inflow=10.46 cfs 0.972 af Primary=10.46 cfs 0.972 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=597.18' Storage=91 cf Inflow=5.81 cfs 0.550 af Outflow=5.81 cfs 0.549 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=595.23' Storage=115 cf Inflow=6.31 cfs 0.609 af Outflow=6.31 cfs 0.609 af Pond 16P: SD-09, SD-10 Peak Elev=594.53' Storage=176 cf Inflow=8.29 cfs 0.769 af Outflow=8.28 cfs 0.769 af Pond 20P: SD-11, SD-12 Peak Elev=593.05'

flow=6.31 cfs 0.609 af Outflow=6.31 cfs 0.609 af Pond 16P: SD-09, SD-10 Peak Elev=594.53' Storage=176 cf Inflow=8.29 cfs 0.769 af Outflow=8.28 cfs 0.769 af Pond 20P: SD-11, SD-12 Peak Elev=593.05' Storage=256 cf Inflow=9.74 cfs 0.894 af Outflow=9.69 cfs 0.894 af Pond 23P: SD-01, SD-02 Peak Elev=599.17' Storage=204 cf Inflow=4.89 cfs 0.446 af Outflow=4.82 cfs 0.444 af