J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 10-Year_Future Rainfall=6.36", P2=4.07" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 162 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>3.45" Flow Length=298' Tc=12.4 min CN=WQ Runoff=2.11 cfs 0.189 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>3.79" Flow Length=85' Slope=0.1773 '/' Tc=7.0 min CN=WQ Runoff=0.63 cfs 0.046 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>3.62" Flow Length=66' Slope=0.2264 '/' Tc=5.2 min CN=WQ Runoff=0.38 cfs 0.026 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>3.41" Flow Length=82' Slope=0.1736 '/' Tc=6.8 min CN=WQ Runoff=0.92 cfs 0.067 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>4.40" Flow Length=239' Tc=13.4 min CN=WQ Runoff=0.38 cfs 0.037 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>3.50" Flow Length=116' Tc=10.2 min CN=WQ Runoff=0.64 cfs 0.053 af Reach 3R: TD-01 Avg. Flow Depth=0.10' Max Vel=4.22 fps Inflow=0.63 cfs 0.046 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=0.63 cfs 0.046 af Reach 4R: TD-02 Avg. Flow Depth=0.07' Max Vel=3.41 fps Inflow=0.38 cfs 0.026 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.38 cfs 0.026 af Reach 5R: TD-03 Avg. Flow Depth=0.23' Max Vel=2.61 fps Inflow=0.92 cfs 0.067 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=0.91 cfs 0.067 af Reach 6R: TD-04 Avg. Flow Depth=0.12' Max Vel=3.52 fps Inflow=0.64 cfs 0.053 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=0.64 cfs 0.053 af Pond 7P: O-1A Inflow=4.74 cfs 0.416 af Primary=4.74 cfs 0.416 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.71' Storage=42 cf Inflow=2.62 cfs 0.233 af Outflow=2.62 cfs 0.233 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.72' Storage=43 cf Inflow=2.88 cfs 0.259 af Outflow=2.88 cfs 0.259 af Pond 16P: SD-09, SD-10 Peak Elev=593.76' Storage=73 cf Inflow=3.75 cfs 0.326 af Outflow=3.75 cfs 0.326 af Pond 20P: SD-11, SD-12 Peak Elev=592.02'

nflow=2.88 cfs 0.259 af Outflow=2.88 cfs 0.259 af Pond 16P: SD-09, SD-10 Peak Elev=593.76' Storage=73 cf Inflow=3.75 cfs 0.326 af Outflow=3.75 cfs 0.326 af Pond 20P: SD-11, SD-12 Peak Elev=592.02' Storage=80 cf Inflow=4.39 cfs 0.379 af Outflow=4.38 cfs 0.379 af Pond 23P: SD-01, SD-02 Peak Elev=597.86' Storage=97 cf Inflow=2.11 cfs 0.189 af Outflow=2.11 cfs 0.187 af