J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Type III 24-hr 100 yr Rainfall=8.72" Prepared byTRC Engineers, Inc. Printed 3/4/2012 HydroCAD® 9,10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 62 Summary for Pond 12P: (new Pond) [57] Hint: Peaked at [62] Hint: Exceeded [61] Hint: Exceeded [61] Hint: Exceeded Inflow Area = Inflow = Outflow = Primary = Secondary = 580.33' (Flood elevation advised) Reach 10R OUTLET depth by 1.35' Reach 11R outlet invert by 0.33' @ Reach 13R outlet invert by 0.33' @ @ 12.09 hrs 12.14 hrs 12.14 hrs 15.341 ac, 24.96% Impervious, Inflow Depth = 6.97" for 100 78.45 cfs@ 12.14 hrs, Volume= 8.905 af 78.45 cfs @ 12.14 hrs, Volume= 8.905 af, Atten= 0%, 27.60 cfs@ 12.14 hrs, Volume= 7.240 af 50.85 cfs @ 12.14 hrs, Volume= 1.665 af yr event Lag= 0.0 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 580.33' @12.14 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 '/' 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=27.60 cfs @ 12.14 hrs HW=580.33’ TW=0.00' (Dynamic Tailwater) 1=Culvert (Inlet Controls 27.60 cfs @ 8.79 fps) Secondary OutFlow Max=50.81 cfs @ 12.14 hrs HW=580.33' TW=0.00' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir (Weir Controls 50.81 cfs @ 1.54 fps)