J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange A_03 01 12 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 48 Summary for Pond Basin5: Basin 5 Inflow Area = Inflow = Outflow = Primary = Secondary = 1.432 ac, 40.59% Impervious, Inflow Depth 3 4.98" for 100 yr event 6.17 cfs@ 12.27 hrs, Volume= 0.595 af 5.34 cfs @ 12.35 hrs, Volume= 0.505 af, Atten= 13%, Lag= 5.0 min 5.34 cfs @ 12.35 hrs, Volume= 0.505 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= 584.85' @ 12.35 hrs Surf. Area3 2,904 sf Storage3 4,851 cf Plug-Flow detention time= 113.7 min calculated for 0.505 af (85% of inflow) Center-of-Mass det. time3 41.7 min ( 925.7 - 884.0 ) 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 Cum.Store (cubic-feet) 0 964 2,747 5,308 Device Routing 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 Invert3 580.50' / 580.00' S3 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=5.34 cfs @ 12.35 hrs HW=584.85' TW=0.00' 1=Culvert (Passes 5.34 cfs of 8.28 cfs potential flow) 2=Grate (Weir Controls 5.34 cfs @ 1.92 fps) (Dynamic Tailwater) 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)