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 285 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 19P: SD-21 Inflow Area = 0.567 ac, 17.46% Impervious, Inflow Depth > 9.74" for 100-Year_Future event Inflow = 1.65 cfs @ 12.58 hrs, Volume= 0.460 af Outflow = 1.65 cfs @ 12.58 hrs, Volume= 0.460 af, Atten= 0%, Lag= 0.2 min Primary = 1.65 cfs @ 12.58 hrs, Volume= 0.460 af Routed to Pond 18P : SD-22 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 591.31' @ 12.58 hrs Surf.Area= 0.001 ac Storage= 0.000 af Plug-Flow detention time= 0.1 min calculated for 0.460 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 868.3 - 868.2 ) Volume #1 Device #1 Invert 590.61' Avail.Storage 0.001 af Routing Primary Invert 590.61' Storage Description 12.0" Round SD-21 L= 64.5' S= 0.0150 '/' Outlet Devices 12.0" Vert. SD-21 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.65 cfs @ 12.58 hrs HW=591.31' TW=589.51' (Dynamic Tailwater) 1=SD-21 (Orifice Controls 1.65 cfs @ 2.84 fps) Pond 19P: SD-21 Hydrograph Inflow Primary 1.65 cfs Inflow Area=0.567 ac Peak Elev=591.31' Storage=0.000 af Flow (cfs) 1.65 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