J_2024 05 09_West Orange Stormwater Management Plan

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange A_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 16 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond Basin5: Basin 5 Inflow Area 3 Inflow = Outflow = Primary = Secondary 3 1.432 ac, 40.59% Impervious, Inflow Depth = 0.35" for 2 yr event 0.56 cfs@ 12.09 hrs, Volume= 0.041 af 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min 0.00 cfs @ 0.00 hrs, Volume= 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= 583.51' @ 24.34 hrs Surf.Area= 1,788 sf Storage3 1,800 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 5,308 cf Custom Stage Data (Prismatic)Listed below (Recalc) 582.00' Elevation (feet) Surf.Area (sq-ft) Inc.Store (cubic-feet) 582.00 583.00 584.00 585.00 431 1,497 2,068 3,055 0 964 1,783 2,562 Cum.Store (cubic-feet) 0 964 2,747 5,308 Device Routing Invert Outlet Devices #1 Primary #2 Device 1 #3 Secondary 580.50' 15.0" Round Culvert L= 65.0' Ke= 0.500 Inlet / Outlet Invert3 580.50' / 580.00' S= 0.0077 7 Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior 584.50' 24.0" x 24.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 585.00' 10.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 12.0' Crest Height Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=582.00’ TW=0.00' (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' (Dynamic Tailwater) 3=Sharp-Crested Rectangular Weir( Controls 0.00 cfs)