J_2024 05 09_West Orange Stormwater Management Plan

Type III 24-hr 2 yr Rainfall=3.42" Pre-Development West Orange with ponds 2 Prepared by TRC Engineers, Inc. Printed 3/4/2012 Page 19 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond 12P: (new Pond) [57] Hint: Peaked at 579.29' (Flood elevation advised) [62] Hint: Exceeded Reach 10R OUTLET depth by 0.51' @ 12.15 hrs Inflow Area = Inflow = Outflow = Primary = Secondary = 15.341 ac, 24.96% Impervious, Inflow Depth = 2.05" for 2 yr event 22.88 cfs@ 12.15 hrs, Volume= 2.621 af 22.88 cfs @ 12.15 hrs, Volume= 2.621 af, Atten= 0%, Lag= 0.0 min 22.88 cfs@ 12.15 hrs, Volume= 2.621 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= 579.29' @ 12.15 hrs Device Routing Invert Outlet Devices #1 Primary 576.00’ 24.0" Round Culvert L= 90.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet lnvert= 576.00' / 574.00' S= 0.0222 V Cc= 0.900 n= 0.011 Concrete pipe, straight & clean #2 Secondary 580.00' 100.0’ long x 20.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=22.87 cfs @ 12.15 hrs HW=579.29' TW=0.00' (Dynamic Tailwater) 1=Culvert (Inlet Controls 22.87 cfs @ 7.28 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=576.00' "^-2=Broad-Crested Rectangular Weir( Controls 0.00 cfs) TW=0.00' (Dynamic Tailwater)