J_2024 05 09_West Orange Stormwater Management Plan

Post Development West Orange A_03 01 12 Prepared by TRC Engineers, Inc. NJ DEP 2-hrNJDEP Rainfall=1.25" Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond Basin3: Basin 3 Inflow Area = Inflow = Outflow = Primary = Secondary = 0.949 ac, 51.87% Impervious, Inflow Depth = 0.13" for NJDEP event 0.33 cfs @ 1.12 hrs, Volume= 0.010 af 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten=100%, Lag3 0.0 min 3 0.00 cfs @ 0.00 hrs, Volume 0.000 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= 592.40' @ 2.34 hrs Surf.Area3 1,173 sf Storage3 441 cf Plug-Flow detention time3 (not calculated: initial storage excedes outflow) Center-of-Mass det. time3 (not calculated: no outflow) Volume Invert Avail-Storage Storage Description #1 592.00' 5,523 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation (feet) 592.00 593.00 594.00 595.00 Device #1 Routing Primary Surf.Area (sg-ft) 1,026 1,392 2,181 2,873 Invert 590.50' #2 #3 Device 1 Device 2 593.50' 594.50' #4 Secondary 594.75' Inc.Store (cubic-feet) 0 1,209 1,787 2,527 Cum.Store (cubic-feet) 0 1,209 2,996 5,523 Outlet Devices 15.0" Round Culvert L= 47.0* Ke= 0.500 Inlet / Outlet Invert3 590.50' / 589.50' S= 0.0213 7 Cc= 0.900 n= 0.020 Corrugated PE, corrugated interior 2.0" Vert. Orifice C= 0.600 24.0" x 24.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 14.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 10.0' Crest Height Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=592.00' TW=587.00' (Dynamic Tailwater) 1=Culvert (Passes 0.00 cfs of 5.53 cfs potential flow) 2=Orifice ( Controls 0.00 cfs) 3=Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=592.00' TW=587.00' (Dynamic Tailwater) 4=Sharp-Crested Rectangular Weir( Controls 0.00 cfs) Page 60