J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 254 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Reach 3R: TD-01 Inflow Area = 0.147 ac, 0.00% Impervious, Inflow Depth > 8.62" for 100-Year_Future event Inflow = 1.38 cfs @ 12.14 hrs, Volume= 0.106 af Outflow = 1.37 cfs @ 12.14 hrs, Volume= 0.106 af, Atten= 0%, Lag= 0.1 min Routed to Pond 12P : SD-03, SD-04, SD-05 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Max. Velocity= 5.60 fps, Min. Travel Time= 0.2 min Avg. Velocity = 1.60 fps, Avg. Travel Time= 0.7 min Peak Storage= 16 cf @ 12.14 hrs Average Depth at Peak Storage= 0.16' , Surface Width= 1.50' Bank-Full Depth= 1.50' Flow Area= 2.3 sf, Capacity= 30.28 cfs 1.50' x 1.50' deep channel, n= 0.012 Concrete pipe, finished Length= 67.2' Slope= 0.0298 '/' Inlet Invert= 606.00', Outlet Invert= 604.00' Reach 3R: TD-01 Hydrograph Inflow Outflow 1.38 cfs Inflow Area=0.147 ac Avg. Flow Depth=0.16' Max Vel=5.60 fps n=0.012 L=67.2' S=0.0298 '/' Capacity=30.28 cfs 1.37 cfs Flow (cfs) 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24

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 Hydrograph for Reach 3R: TD-01 Time (hours) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.50 17.00 17.50 18.00 18.50 19.00 19.50 20.00 20.50 21.00 21.50 22.00 22.50 23.00 23.50 24.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.05 0.06 0.09 0.16 0.70 0.30 0.16 0.10 0.08 0.07 0.05 0.05 0.04 0.04 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 Storage Elevation (cubic-feet) (feet) 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 0 606.00 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 2 606.02 2 606.02 2 606.02 3 606.03 4 606.04 11 606.11 6 606.06 4 606.04 3 606.03 3 606.03 2 606.02 2 606.02 2 606.02 2 606.02 2 606.02 2 606.02 2 606.02 2 606.02 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 1 606.01 Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.05 0.06 0.09 0.16 0.69 0.30 0.16 0.10 0.08 0.07 0.05 0.05 0.04 0.04 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 Printed 5/13/2024 Page 255

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 256 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Reach 4R: TD-02 Inflow Area = 0.086 ac, 0.00% Impervious, Inflow Depth > 8.39" for 100-Year_Future event Inflow = 0.84 cfs @ 12.12 hrs, Volume= 0.060 af Outflow = 0.84 cfs @ 12.12 hrs, Volume= 0.060 af, Atten= 0%, Lag= 0.1 min Routed to Pond 15P : SD-06, SD-07, SD-08 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Max. Velocity= 4.60 fps, Min. Travel Time= 0.1 min Avg. Velocity = 1.41 fps, Avg. Travel Time= 0.4 min Peak Storage= 6 cf @ 12.12 hrs Average Depth at Peak Storage= 0.12' , Surface Width= 1.50' Bank-Full Depth= 1.50' Flow Area= 2.3 sf, Capacity= 29.34 cfs 1.50' x 1.50' deep channel, n= 0.012 Concrete pipe, finished Length= 34.0' Slope= 0.0279 '/' Inlet Invert= 604.25', Outlet Invert= 603.30' Reach 4R: TD-02 Hydrograph 0.9 Inflow Area=0.086 ac Avg. Flow Depth=0.12' Max Vel=4.60 fps n=0.012 L=34.0' S=0.0279 '/' Capacity=29.34 cfs 0.84 cfs 0.85 0.8 0.75 0.7 0.65 0.6 Flow (cfs) Inflow Outflow 0.84 cfs 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24

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 Hydrograph for Reach 4R: TD-02 Time (hours) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.50 17.00 17.50 18.00 18.50 19.00 19.50 20.00 20.50 21.00 21.50 22.00 22.50 23.00 23.50 24.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.01 0.02 0.03 0.03 0.05 0.09 0.46 0.17 0.09 0.06 0.05 0.04 0.03 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 Storage (cubic-feet) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 2 4 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 Elevation (feet) 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.25 604.26 604.26 604.26 604.26 604.26 604.27 604.27 604.28 604.33 604.29 604.28 604.27 604.27 604.27 604.27 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 604.26 Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.01 0.02 0.03 0.03 0.05 0.09 0.46 0.17 0.09 0.06 0.05 0.04 0.03 0.03 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 Printed 5/13/2024 Page 257

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 258 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Reach 5R: TD-03 Inflow Area = 0.236 ac, 0.00% Impervious, Inflow Depth > 8.11" for 100-Year_Future event Inflow = 2.13 cfs @ 12.14 hrs, Volume= 0.160 af Outflow = 2.11 cfs @ 12.15 hrs, Volume= 0.159 af, Atten= 1%, Lag= 0.4 min Routed to Pond 16P : SD-09, SD-10 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Max. Velocity= 3.41 fps, Min. Travel Time= 0.7 min Avg. Velocity = 0.95 fps, Avg. Travel Time= 2.3 min Peak Storage= 83 cf @ 12.15 hrs Average Depth at Peak Storage= 0.41' , Surface Width= 1.50' Bank-Full Depth= 1.50' Flow Area= 2.3 sf, Capacity= 11.66 cfs 1.50' x 1.50' deep channel, n= 0.012 Concrete pipe, finished Length= 133.7' Slope= 0.0044 '/' Inlet Invert= 601.81', Outlet Invert= 601.22' Reach 5R: TD-03 Hydrograph Inflow Outflow 2.13 cfs Inflow Area=0.236 ac Avg. Flow Depth=0.41' Max Vel=3.41 fps n=0.012 L=133.7' S=0.0044 '/' Capacity=11.66 cfs 2.11 cfs Flow (cfs) 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24

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 Hydrograph for Reach 5R: TD-03 Time (hours) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.50 17.00 17.50 18.00 18.50 19.00 19.50 20.00 20.50 21.00 21.50 22.00 22.50 23.00 23.50 24.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.05 0.06 0.08 0.14 0.24 1.07 0.46 0.24 0.16 0.12 0.10 0.08 0.07 0.07 0.06 0.06 0.05 0.05 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.03 0.03 0.03 0.03 0.03 Storage Elevation (cubic-feet) (feet) 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 0 601.81 1 601.81 1 601.82 2 601.82 3 601.83 4 601.83 4 601.83 5 601.84 6 601.84 7 601.85 9 601.85 10 601.86 14 601.88 20 601.91 50 602.06 30 601.96 20 601.91 15 601.89 13 601.88 12 601.87 10 601.86 10 601.86 9 601.86 9 601.85 8 601.85 8 601.85 7 601.85 7 601.84 7 601.84 7 601.84 6 601.84 6 601.84 6 601.84 6 601.84 6 601.84 6 601.84 6 601.84 5 601.84 5 601.84 Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.05 0.06 0.08 0.13 0.24 1.02 0.47 0.25 0.16 0.12 0.10 0.08 0.07 0.07 0.06 0.06 0.05 0.05 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.03 0.03 0.03 0.03 0.03 Printed 5/13/2024 Page 259

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 260 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Reach 6R: TD-04 Inflow Area = 0.183 ac, 0.00% Impervious, Inflow Depth > 8.22" for 100-Year_Future event Inflow = 1.47 cfs @ 12.18 hrs, Volume= 0.125 af Outflow = 1.47 cfs @ 12.18 hrs, Volume= 0.125 af, Atten= 0%, Lag= 0.1 min Routed to Pond 20P : SD-11, SD-12 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Max. Velocity= 4.72 fps, Min. Travel Time= 0.2 min Avg. Velocity = 1.35 fps, Avg. Travel Time= 0.7 min Peak Storage= 17 cf @ 12.18 hrs Average Depth at Peak Storage= 0.21' , Surface Width= 1.50' Bank-Full Depth= 1.50' Flow Area= 2.3 sf, Capacity= 22.41 cfs 1.50' x 1.50' deep channel, n= 0.012 Concrete pipe, finished Length= 54.6' Slope= 0.0163 '/' Inlet Invert= 600.77', Outlet Invert= 599.88' Reach 6R: TD-04 Hydrograph Inflow Outflow 1.47 cfs Inflow Area=0.183 ac Avg. Flow Depth=0.21' Max Vel=4.72 fps n=0.012 L=54.6' S=0.0163 '/' Capacity=22.41 cfs 1.47 cfs Flow (cfs) 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24

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 Hydrograph for Reach 6R: TD-04 Time (hours) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.50 17.00 17.50 18.00 18.50 19.00 19.50 20.00 20.50 21.00 21.50 22.00 22.50 23.00 23.50 24.00 Inflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.04 0.05 0.06 0.10 0.18 0.65 0.41 0.20 0.13 0.10 0.08 0.07 0.06 0.05 0.05 0.05 0.04 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.02 Storage Elevation (cubic-feet) (feet) 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.77 0 600.78 1 600.78 1 600.78 1 600.78 1 600.79 1 600.79 2 600.79 2 600.79 2 600.80 3 600.81 4 600.82 10 600.89 8 600.86 5 600.83 4 600.82 3 600.81 3 600.80 2 600.80 2 600.80 2 600.80 2 600.79 2 600.79 2 600.79 2 600.79 2 600.79 2 600.79 2 600.79 1 600.79 1 600.79 1 600.79 1 600.79 1 600.79 1 600.79 1 600.79 1 600.79 1 600.79 Outflow (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.03 0.04 0.05 0.06 0.10 0.18 0.65 0.41 0.20 0.13 0.10 0.08 0.07 0.06 0.05 0.05 0.05 0.04 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.02 Printed 5/13/2024 Page 261

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 262 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 7P: O-1A Inflow Area = Inflow = Primary = 1.409 ac, 2.20% Impervious, Inflow Depth > 8.28" for 100-Year_Future event 10.46 cfs @ 12.18 hrs, Volume= 0.972 af 10.46 cfs @ 12.18 hrs, Volume= 0.972 af, Atten= 0%, Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Pond 7P: O-1A Hydrograph Inflow Primary 10.46 cfs 11 Inflow Area=1.409 ac 10.46 cfs 10 9 Flow (cfs) 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24

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 Hydrograph for Pond 7P: O-1A Time (hours) 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.50 17.00 17.50 18.00 18.50 19.00 19.50 20.00 20.50 21.00 21.50 22.00 22.50 23.00 23.50 24.00 Inflow Elevation (cfs) (feet) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.03 0.04 0.09 0.11 0.15 0.18 0.22 0.29 0.39 0.50 0.79 1.39 4.80 3.40 1.59 1.01 0.76 0.64 0.52 0.45 0.42 0.39 0.35 0.32 0.28 0.26 0.26 0.25 0.24 0.23 0.22 0.21 0.21 0.20 0.19 0.18 0.17 Primary (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.03 0.04 0.09 0.11 0.15 0.18 0.22 0.29 0.39 0.50 0.79 1.39 4.80 3.40 1.59 1.01 0.76 0.64 0.52 0.45 0.42 0.39 0.35 0.32 0.28 0.26 0.26 0.25 0.24 0.23 0.22 0.21 0.21 0.20 0.19 0.18 0.17 Printed 5/13/2024 Page 263