J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Type III 24-hr 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/4/2012 Page 42 Summary for Pond 15P: Yard Area Ponding [57] Hint: Peaked at 599.15' (Flood elevation advised) [62] Hint: Exceeded Reach 15R OUTLET depth by 2.64' @ 12.62 hrs Inflow Area = Inflow = Outflow = Primary = Secondary = 6.124 ac, 27.47% Impervious, Inflow Depth = 3.70" for 10 yr event 17.49 cfs @ 12.20 hrs, Volume= 1.887 af 17.49 cfs @ 12.20 hrs, Volume= 1.887 af, Atten= 0%, Lag= 0.0 min 2.76 cfs @ 12.59 hrs, Volume= 1.266 af 14.74 cfs @ 12.20 hrs, Volume= 0.621 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 599.15' @ 12.20 hrs Device Routing Invert Outlet Devices #1 Primary 594.92' 12.0" Round Culvert L= 220.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet lnvert= 594.92'/ 590.25' S= 0.0212'/’ Cc= 0.900 n= 0.025 Corrugated metal #2 Secondary 599.00' 100.0'long x 10.0'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) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=2.76 cfs @ 12.59 hrs HW=599.07' TW=593.80' (Dynamic Tailwater) 1=Culvert (Outlet Controls 2.76 cfs @ 3.52 fps) Secondary OutFlow Max=14.73 cfs @ 12.20 hrs HW=599.15' TW=590.49' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir (Weir Controls 14.73 cfs @ 0.97 fps)