J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NJ DEP 2-hr WQ Rainfall=1.25", P2=3.42" 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 36 Summary for Pond 16P: SD-09, SD-10 Inflow Area = 1.125 ac, 0.00% Impervious, Inflow Depth = 0.06" for WQ event Inflow = 0.10 cfs @ 1.54 hrs, Volume= 0.006 af Outflow = 0.10 cfs @ 1.56 hrs, Volume= 0.006 af, Atten= 1%, Lag= 1.3 min Primary = 0.10 cfs @ 1.56 hrs, Volume= 0.006 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= 592.96' @ 1.56 hrs Surf.Area= 34 sf Storage= 7 cf Plug-Flow detention time= 1.9 min calculated for 0.006 af (99% of inflow) Center-of-Mass det. time= 1.3 min ( 98.6 - 97.3 ) 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=0.10 cfs @ 1.56 hrs HW=592.96' TW=591.14' (Dynamic Tailwater) 1=SD-10 (Orifice Controls 0.10 cfs @ 1.24 fps)