J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (25-Year) NOAA 24-hr D 25-Year Rainfall=6.44", P2=3.42" West Orange HydroCAD_Post Printed 5/13/2024 Page 64 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 14P: SD-24 Inflow Area = 1.622 ac, 27.37% Impervious, Inflow Depth > 4.94" for 25-Year event Inflow = 1.58 cfs @ 12.46 hrs, Volume= 0.668 af Outflow = 1.58 cfs @ 12.46 hrs, Volume= 0.668 af, Atten= 0%, Lag= 0.1 min Primary = 1.58 cfs @ 12.46 hrs, Volume= 0.668 af Routed to Pond 13P : SD-25, SD-26 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 585.49' @ 12.46 hrs Surf.Area= 0.001 ac Storage= 0.000 af Plug-Flow detention time= 0.1 min calculated for 0.668 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 886.9 - 886.8 ) Volume #1 Device #1 Invert 584.88' Avail.Storage 0.003 af Routing Primary Invert 584.88' Storage Description 15.0" Round SD-24 L= 111.3' S= 0.0150 '/' Outlet Devices 15.0" Vert. SD-24 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.58 cfs @ 12.46 hrs HW=585.49' TW=581.08' (Dynamic Tailwater) 1=SD-24 (Orifice Controls 1.58 cfs @ 2.66 fps) Pond 14P: SD-24 Hydrograph Inflow Primary 1.58 cfs Inflow Area=1.622 ac Peak Elev=585.49' Storage=0.000 af Flow (cfs) 1.58 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