J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" West Orange HydroCAD_Post Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 75 Summary for Pond 16P: SD-09, SD-10 Inflow Area = 1.125 ac, 0.00% Impervious, Inflow Depth > 1.20" for 2-Year_Current event Inflow = 1.23 cfs @ 12.18 hrs, Volume= 0.112 af Outflow = 1.23 cfs @ 12.18 hrs, Volume= 0.112 af, Atten= 0%, Lag= 0.3 min Primary = 1.23 cfs @ 12.18 hrs, Volume= 0.112 af 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 Peak Elev= 593.33' @ 12.18 hrs Surf.Area= 77 sf Storage= 27 cf Plug-Flow detention time= 1.1 min calculated for 0.112 af (100% of inflow) Center-of-Mass det. time= 0.6 min ( 875.6 - 875.1 ) Volume #1 Invert 600.62' Avail.Storage 8 cf #2 #3 592.83' 592.83' 123 cf 148 cf #4 592.58' 127 cf 407 cf Storage Description 12.0" Round SD-09 L= 10.0' S= 0.0100 '/' MH-06 (Prismatic) Listed below (Recalc) 18.0" Round SD-10 L= 84.0' S= 0.0100 '/' MH-07 (Prismatic) Listed below (Recalc) Total Available Storage Elevation (feet) 592.83 602.32 Surf.Area (sq-ft) 13 13 Inc.Store (cubic-feet) 0 123 Cum.Store (cubic-feet) 0 123 Elevation (feet) 592.58 602.35 Surf.Area (sq-ft) 13 13 Inc.Store (cubic-feet) 0 127 Cum.Store (cubic-feet) 0 127 Device #1 Routing Primary Invert 592.83' Outlet Devices 18.0" Vert. SD-10 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=1.23 cfs @ 12.18 hrs HW=593.33' TW=591.54' (Dynamic Tailwater) 1=SD-10 (Orifice Controls 1.23 cfs @ 2.40 fps)