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 byTRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/14/2012 Page 30 Summary for Pond Basin4: Basin 4 Inflow Area = Inflow = 3 Outflow Primary = Secondary = 1.146 ac, 46.51% Impervious, Inflow Depth = 2.27" for 10 yr event 0.98 cfs@ 12.62 hrs, Volume= 0.217 af 0.24 cfs @ 15.83 hrs, Volume3 0.123 af, Atten= 76%, Lag= 192.9 min 0.24 cfs @ 15.83 hrs, Volume= 0.123 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= 589.65'@ 15.83 hrs Surf.Area= 2,385 sf Storage3 4,442 cf Plug-Flow detention time= 290.0 min calculated for 0.123 af (57% of inflow) Center-of-Mass det. time= 146.5 min ( 1,071.8 - 925.3 ) Volume Invert #1 Avail.Storage Storage Description 5,305 cf Custom Stage Data (Prismatic)Listed below (Recalc) 587.00' Elevation (feet) Surf.Area (sq-ft) Inc.Store (cubic-feet) Cum.Store (cubic-feet) 587.00 588.00 589.00 590.00 1,002 1,498 2,015 2,582 0 1,250 1,757 2,299 0 1,250 3,007 5,305 Device Routing #1 Primary Invert Outlet Devices 585.00' #2 #3 Device 1 Device 2 588.50' 589.50' #4 Secondary 589.75* 15.0” Round Culvert L= 37.0' Ke= 0.500 Inlet / Outlet Invert3 585.00' / 584.00' S= 0.0270 V Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior 3.0" Vert. Orifice C= 0.600 24.0" x 24.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 12.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 10.0' Crest Height Primary OutFlow Max=0.24 cfs @ 15.83 hrs HW=589.65* TW=584.55' 1=Culvert (Passes 0.24 cfs of 10.98 cfs potential flow) 2=Orifice (Orifice Controls 0.24 cfs @ 4.88 fps) 3=Grate (Passes 0.24 cfs of 1.56 cfs potential flow) (Dynamic Tailwater) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=587.00' TW=582.00' (Dynamic Tailwater) 4=Sharp-Crested Rectangular Weir( Controls 0.00 cfs)