J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Type III 24-hr 10 yr Rainfall=5.2r' Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/4/2012 Page 40 Summary for Pond 12P: (new Pond) [57] Hint: Peaked at580.14' (Flood elevation advised) [62] Hint: Exceeded Reach 10R OUTLET depth by 1.30’ @ 12.10 hrs [61] Hint: Exceeded Reach 11R outlet invert by 0.14' @ 12.15 hrs [61] Hint: Exceeded Reach 13R outlet invert by 0.14' @ 12.15 hrs Inflow Area = Inflow = Outflow = Primary = Secondary = 15.341 ac, 41.26 cfs@ 41.26 cfs @ 26.82 cfs@ 14.44 cfs @ 24.96% Impervious, Inflow 12.15 hrs, Volume= 12.15 hrs, Volume= 12.15 hrs, Volume= 12.15 hrs, Volume= Depth = 3.65" for 10 yr event 4.661 af 4.661 af, Atten= 0%, Lag= 0.0 min 4.366 af 0.295 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 580.14’ @ 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 n= 0.011 Concrete pipe, straight & clean #2 Secondary 580.00' 7 Cc= 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=26.82 cfs @ 12.15 hrs HW=580.14' TW=0.00' (Dynamic Tailwater) ■t-1=Culvert (Inlet Controls 26.82 cfs @ 8.54 fps) Secondary OutFlow Max=14.42 cfs @ 12.15 hrs HW=580.14' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir (Weir Controls 14.42 cfs @ 1.01 fps) 0.900