J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 100-Year_Current Rainfall=9.23", P2=3.45" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 201 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>5.98" Flow Length=298' Tc=13.3 min CN=WQ Runoff=3.52 cfs 0.327 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>6.40" Flow Length=85' Slope=0.1773 '/' Tc=7.6 min CN=WQ Runoff=1.01 cfs 0.078 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>6.19" Flow Length=66' Slope=0.2264 '/' Tc=5.6 min CN=WQ Runoff=0.62 cfs 0.044 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>5.94" Flow Length=82' Slope=0.1736 '/' Tc=7.4 min CN=WQ Runoff=1.54 cfs 0.117 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>7.06" Flow Length=239' Tc=14.3 min CN=WQ Runoff=0.59 cfs 0.059 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>6.04" Flow Length=116' Tc=11.1 min CN=WQ Runoff=1.06 cfs 0.092 af Reach 3R: TD-01 Avg. Flow Depth=0.13' Max Vel=5.02 fps Inflow=1.01 cfs 0.078 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=1.01 cfs 0.078 af Reach 4R: TD-02 Avg. Flow Depth=0.10' Max Vel=4.12 fps Inflow=0.62 cfs 0.044 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.62 cfs 0.044 af Reach 5R: TD-03 Avg. Flow Depth=0.33' Max Vel=3.09 fps Inflow=1.54 cfs 0.117 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=1.53 cfs 0.117 af Reach 6R: TD-04 Avg. Flow Depth=0.17' Max Vel=4.21 fps Inflow=1.06 cfs 0.092 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=1.06 cfs 0.092 af Pond 7P: O-1A Inflow=7.72 cfs 0.716 af Primary=7.72 cfs 0.716 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.96' Storage=67 cf Inflow=4.29 cfs 0.404 af Outflow=4.29 cfs 0.403 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.99' Storage=77 cf Inflow=4.69 cfs 0.448 af Outflow=4.69 cfs 0.448 af Pond 16P: SD-09, SD-10 Peak Elev=594.10' Storage=123 cf Inflow=6.14 cfs 0.565 af Outflow=6.13 cfs 0.564 af Pond 20P: SD-11, SD-12 Peak Elev=592.45'

flow=4.69 cfs 0.448 af Outflow=4.69 cfs 0.448 af Pond 16P: SD-09, SD-10 Peak Elev=594.10' Storage=123 cf Inflow=6.14 cfs 0.565 af Outflow=6.13 cfs 0.564 af Pond 20P: SD-11, SD-12 Peak Elev=592.45' Storage=151 cf Inflow=7.18 cfs 0.656 af Outflow=7.15 cfs 0.656 af Pond 23P: SD-01, SD-02 Peak Elev=598.40' Storage=122 cf Inflow=3.52 cfs 0.327 af Outflow=3.51 cfs 0.325 af