J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" West Orange HydroCAD_Post Printed 5/13/2024 Page 281 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 17P: SD-23 Inflow Area = 1.305 ac, 24.67% Impervious, Inflow Depth > 9.83" for 100-Year_Future event Inflow = 4.27 cfs @ 12.27 hrs, Volume= 1.069 af Outflow = 4.26 cfs @ 12.28 hrs, Volume= 1.069 af, Atten= 0%, Lag= 0.3 min Primary = 4.26 cfs @ 12.28 hrs, Volume= 1.069 af Routed to Pond 14P : SD-24 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 587.94' @ 12.28 hrs Surf.Area= 0.002 ac Storage= 0.001 af Plug-Flow detention time= 0.1 min calculated for 1.069 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 869.9 - 869.8 ) Volume #1 Device #1 Invert 586.80' Avail.Storage 0.003 af Routing Primary Invert 586.80' Storage Description 15.0" Round SD-23 L= 93.7' S= 0.0150 '/' Outlet Devices 15.0" Vert. SD-23 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=4.26 cfs @ 12.28 hrs HW=587.94' TW=586.13' (Dynamic Tailwater) 1=SD-23 (Orifice Controls 4.26 cfs @ 3.63 fps) Pond 17P: SD-23 Hydrograph Inflow Primary 4.27 cfs Inflow Area=1.305 ac Peak Elev=587.94' Storage=0.001 af 4.26 cfs 4 Flow (cfs) 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