J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 10-Year_Current Rainfall=5.37", P2=3.45" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 123 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>2.63" Flow Length=298' Tc=13.3 min CN=WQ Runoff=1.56 cfs 0.144 af Subcatchment 4S: PO-DA B Runoff Area=6,403 sf 0.00% Impervious Runoff Depth>2.94" Flow Length=85' Slope=0.1773 '/' Tc=7.6 min CN=WQ Runoff=0.48 cfs 0.036 af Subcatchment 6S: PO-DA D Runoff Area=3,746 sf 0.00% Impervious Runoff Depth>2.78" Flow Length=66' Slope=0.2264 '/' Tc=5.6 min CN=WQ Runoff=0.29 cfs 0.020 af Subcatchment 8S: PO-DA F Runoff Area=10,281 sf 0.00% Impervious Runoff Depth>2.60" Flow Length=82' Slope=0.1736 '/' Tc=7.4 min CN=WQ Runoff=0.69 cfs 0.051 af Subcatchment 10S: PO-DA H Subcatchment 13S: PO-DA K Runoff Area=4,400 sf 30.68% Impervious Runoff Depth>3.51" Flow Length=239' Tc=14.3 min CN=WQ Runoff=0.29 cfs 0.030 af Subcatchment 14S: PO-DA L Runoff Area=7,972 sf 0.00% Impervious Runoff Depth>2.67" Flow Length=116' Tc=11.1 min CN=WQ Runoff=0.47 cfs 0.041 af Reach 3R: TD-01 Avg. Flow Depth=0.08' Max Vel=3.81 fps Inflow=0.48 cfs 0.036 af n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs Outflow=0.48 cfs 0.036 af Reach 4R: TD-02 Avg. Flow Depth=0.06' Max Vel=3.08 fps Inflow=0.29 cfs 0.020 af n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs Outflow=0.29 cfs 0.020 af Reach 5R: TD-03 Avg. Flow Depth=0.19' Max Vel=2.35 fps Inflow=0.69 cfs 0.051 af n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs Outflow=0.68 cfs 0.051 af Reach 6R: TD-04 Avg. Flow Depth=0.10' Max Vel=3.15 fps Inflow=0.47 cfs 0.041 af n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs Outflow=0.47 cfs 0.041 af Pond 7P: O-1A Inflow=3.53 cfs 0.319 af Primary=3.53 cfs 0.319 af Pond 12P: SD-03, SD-04, SD-05 Peak Elev=596.60' Storage=32 cf Inflow=1.95 cfs 0.178 af Outflow=1.95 cfs 0.178 af Pond 15P: SD-06, SD-07, SD-08 Peak Elev=594.60' Storage=30 cf Inflow=2.14 cfs 0.198 af Outflow=2.14 cfs 0.198 af Pond 16P: SD-09, SD-10 Peak Elev=593.61' Storage=54 cf Inflow=2.78 cfs 0.249 af Outflow=2.78 cfs 0.248 af Pond 20P: SD-11, SD-12 Peak Elev=591.85'

nflow=2.14 cfs 0.198 af Outflow=2.14 cfs 0.198 af Pond 16P: SD-09, SD-10 Peak Elev=593.61' Storage=54 cf Inflow=2.78 cfs 0.249 af Outflow=2.78 cfs 0.248 af Pond 20P: SD-11, SD-12 Peak Elev=591.85' Storage=58 cf Inflow=3.25 cfs 0.289 af Outflow=3.25 cfs 0.289 af Pond 23P: SD-01, SD-02 Peak Elev=597.71' Storage=94 cf Inflow=1.56 cfs 0.144 af Outflow=1.56 cfs 0.142 af