J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange A_03 01 12 Type III 24-hr 10 yr Rainfall=5.21" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 32 Summary for Pond Basin5: Basin 5 Inflow Area = Inflow Outflow = Primary = Secondary = 1.432 ac, 40.59% Impervious, 1.05 cfs @ 12.09 hrs, Volume= 0.28 cfs @ 15.95 hrs, Volume= 0.28 cfs @ 15.95 hrs, Volume= 0.00 cfs @ 0.00 hrs, Volume= Inflow Depth = 1.68" for 10 yr event 0.200 af 0.110 af, Atten=74%, Lag= 231.5 min 0.110 af 0.000 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 584.55' @ 15.95 hrs Surf.Area= 2,609 sf Storage^ 4,028 cf Plug-Flow detention time= 324.6 min calculated for 0.110 af (55% of inflow) Center-of-Mass det. time= 165.4 min ( 1,134.1 - 968.7) Volume Invert #1 Avail.Storage Storage Description 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 Device Routing Cum.Store (cubic-feet) 0 964 2,747 5,308 Invert Outlet Devices #1 Primary 580.50' #2 Device 1 584.50' #3 Secondary 585.00' 15.0" Round Culvert L= 65.0' Ke= 0.500 Inlet/Outlet lnvert= 580.50'/580.00' S= 0.0077 7’ Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior 24.0" x 24.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 10.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 12.0' Crest Height Primary OutFlow Max=0.28 cfs @ 15.95 hrs HW=584.55' TW=0.00' (Dynamic Tailwater) 1=Culvert (Passes 0.28 cfs of 7.93 cfs potential flow) 2=Grate (Weir Controls 0.28 cfs @ 0.72 fps) 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)