J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) NOAA 24-hr D 100-Year_Current Rainfall=9.23", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 243 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 18P: SD-22 Inflow Area = 0.917 ac, 22.90% Impervious, Inflow Depth > 7.58" for 100-Year_Current event Inflow = 2.68 cfs @ 12.34 hrs, Volume= 0.579 af Outflow = 2.68 cfs @ 12.35 hrs, Volume= 0.579 af, Atten= 0%, Lag= 0.5 min Primary = 2.68 cfs @ 12.35 hrs, Volume= 0.579 af Routed to Pond 17P : SD-23 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 589.45' @ 12.35 hrs Surf.Area= 0.001 ac Storage= 0.001 af Plug-Flow detention time= 0.1 min calculated for 0.579 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 861.5 - 861.4 ) Volume #1 Device #1 Invert 588.45' Avail.Storage 0.002 af Routing Primary Invert 588.45' Storage Description 12.0" Round SD-22 L= 127.3' S= 0.0150 '/' Outlet Devices 12.0" Vert. SD-22 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.68 cfs @ 12.35 hrs HW=589.45' TW=587.69' (Dynamic Tailwater) 1=SD-22 (Orifice Controls 2.68 cfs @ 3.41 fps) Pond 18P: SD-22 Hydrograph 3 Inflow Primary 2.68 cfs Inflow Area=0.917 ac Peak Elev=589.45' Storage=0.001 af 2.68 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