J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange A_03 01 12 Prepared by TRC Engineers, Inc. NJ DEP 2-hrNJDEP Rainfall=1.25" Printed 3/14/2012 HydroCAD® 9.10 sIn 06401 © 2009 HydroCAD Software Solutions LLC Page 64 Summary for Pond Basin5: Basin 5 Inflow Area = Inflow = Outflow = Primary = Secondary = 1.432 ac, 40.59% Impervious, Inflow Depth = 0.06" for NJDEP event 0.22 cfs @ 1.13 hrs, Volume= 0.007 af 0.00 cfs@ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min 0.00 cfs @ 0.00 hrs, Volume3 0.000 af 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 582.45’ @ 2.34 hrs Surf.Area= 906 sf Storage3 298 cf Plug-Flow detention time3 (not calculated: initial storage excedes outflow) Center-of-Mass det. time3 (not calculated: no outflow) Volume Invert Avail-Storage Storage Description #1 582.00' 5,308 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation (feet) 582.00 583.00 584.00 585.00 Surf.Area (sq-ft) 431 1,497 2,068 3,055 Device #1 Routing Primary Invert 580.50’ #2 Device 1 584.50' #3 Secondary 585.00' Inc.Store (cubic-feet) 0 964 1,783 2,562 Cum.Store (cubic-feet) 0 964 2,747 5,308 Outlet Devices 15.0" Round Culvert L= 65.0’ Ke= 0.500 Inlet / Outlet Invert3 580.50' / 580.00' S= 0.0077 T Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior 24.0" x 24.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 10.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 12.0' Crest Height Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW3582.00' TW30.00’ (Dynamic Tailwater) 1=Culvert (Passes 0.00 cfs of 4.19 cfs potential flow) 2=Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=582.00' TW=0.00’ 3=Sharp-Crested Rectangular Weir( Controls 0.00 cfs) (Dynamic Tailwater)