J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Prepared by TRC Engineers, Inc. NJ DEP 2-hr NJDEP Rainfall=1.25" Printed 3/4/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 83 Summary for Pond 12P: (new Pond) [57] Hint: Peaked at 577.45’ (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = Secondary = 15.341 ac, 24.96% Impervious, Inflow Depth = 0.41" for NJDEP event 10.02 cfs @ 1.18 hrs, Volume= 0.530 af 10.02 cfs @ 1.18 hrs, Volume= 0.530 af, Atten= 0%, Lag= 0.0 min 10.02 cfs @ 1.18 hrs, Volume= 0.530 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= 577.45’ @ 1.18 hrs Device Routinq Invert Outlet Devices #1 Primary 576.00' 24.0" Round Culvert L= 90.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet / Outlet lnvert= 576.00' / 574.00' S= 0.0222 n= 0.011 Concrete pipe, straight & clean #2 Secondary '/' Cc= 0.900 100.0' long x 20.0' breadth Broad-Crested Rectangular Weir 580.00' Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=10.02 cfs @ 1.18 hrs HW=577.45' TW=0.00' (Dynamic Tailwater) 1=Culvert (Inlet Controls 10.02 cfs @ 4.10 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=576.00’ TW=0.00’ 2=Broad-Crested Rectangular Weir( Controls 0.00 cfs) cfs) (Dynamic Tailwater) Pond 12P: (new Pond) Hydrograph .1. 10 09 rfs I no 1CLQ2 —1 f—1—I—1—i • i i 1 l 1 i i i i ~i i~ ”*l** ”t" ~i 1 i i i i~ l 10.02 cfs l l i 1 1 1 < i” ~l" 1 1 i i i 1 i 1 1 i ”l t 1 i i ii i i i i 1 O 6- ; t 1 i 1 i 1 l 1 i 1 1 1 • 1 1 1 r i i i l i 1 1 1 i i i 1 1 1 1 1 1 i i i i t “ ~ i 1 1 1 1 1 • 1 1 I 1 I 1 1 1 1 1 ■ 1 ■ 7 7 7 ' : T r 777 : 1 • > > 1 1 1 S 1 1 1 1 1 ( 1 1 1 1 1 1 - i i • “ i i i i i — r • — < i — i i 1 1 1 1 1 :1 i i r r i » r « _ i 1 i i l t i i _ i i ■ Inflow □ Outflow SI Primary M Secondary 1 _ " I 1 1 _ 1 i I 1 1 1 1 t i ~ i • 1 • 1 1 t i i 1 i 1 1 i ii 1 l 1 1 i 1 1 l 1 l 1 1 i 1 1 1 1 _ ~ 1 1 • i l 1 I 1 i i * "T r l 1 1 1 ac 1 nflc>w Are a-15.341 Peak E :lev=577.45’ 1 1 i 1 l 1 i 1 • 1 1 ; ; I ___ l _ 1 ______ 1 i i 1 1 1 1 1 _ 1. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

1 1 1 ac 1 nflc>w Are a-15.341 Peak E :lev=577.45’ 1 1 i 1 l 1 i 1 • 1 1 ; ; I ___ l _ 1 ______ 1 i i 1 1 1 1 1 _ 1. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) _ m 0.00 cfs ]