J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 45 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>1.19" Flow Length=298' Tc=13.3 min CN=WQ Runoff=0.68 cfs 0.065 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>1.40" Flow Length=85' Slope=0.1773 '/' Tc=7.6 min CN=WQ Runoff=0.23 cfs 0.017 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>1.29" Flow Length=66' Slope=0.2264 '/' Tc=5.6 min CN=WQ Runoff=0.13 cfs 0.009 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>1.16" Flow Length=82' Slope=0.1736 '/' Tc=7.4 min CN=WQ Runoff=0.30 cfs 0.023 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>1.89" Flow Length=239' Tc=14.3 min CN=WQ Runoff=0.16 cfs 0.016 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>1.22" Flow Length=116' Tc=11.1 min CN=WQ Runoff=0.21 cfs 0.019 af Reach 3R: TD-01 Avg. Flow Depth=0.05' Max Vel=2.88 fps Inflow=0.23 cfs 0.017 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=0.23 cfs 0.017 af Reach 4R: TD-02 Avg. Flow Depth=0.04' Max Vel=2.31 fps Inflow=0.13 cfs 0.009 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.13 cfs 0.009 af Reach 5R: TD-03 Avg. Flow Depth=0.11' Max Vel=1.75 fps Inflow=0.30 cfs 0.023 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=0.29 cfs 0.023 af Reach 6R: TD-04 Avg. Flow Depth=0.06' Max Vel=2.32 fps Inflow=0.21 cfs 0.019 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=0.21 cfs 0.019 af Pond 7P: O-1A Inflow=1.59 cfs 0.146 af Primary=1.59 cfs 0.146 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.37' Storage=16 cf Inflow=0.86 cfs 0.080 af Outflow=0.86 cfs 0.080 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.36' Storage=13 cf Inflow=0.95 cfs 0.089 af Outflow=0.95 cfs 0.089 af Pond 16P: SD-09, SD-10 Peak Elev=593.33' Storage=27 cf Inflow=1.23 cfs 0.112 af Outflow=1.23 cfs 0.112 af Pond 20P: SD-11, SD-12 Peak Elev=591.54'

nflow=0.95 cfs 0.089 af Outflow=0.95 cfs 0.089 af Pond 16P: SD-09, SD-10 Peak Elev=593.33' Storage=27 cf Inflow=1.23 cfs 0.112 af Outflow=1.23 cfs 0.112 af Pond 20P: SD-11, SD-12 Peak Elev=591.54' Storage=30 cf Inflow=1.44 cfs 0.131 af Outflow=1.44 cfs 0.130 af Pond 23P: SD-01, SD-02 Peak Elev=597.46' Storage=90 cf Inflow=0.68 cfs 0.065 af Outflow=0.68 cfs 0.063 af