J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Type III 24-hr 2 yr Rainfall=3.42" Printed 3/4/2012 Page 18 Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Pond 10P: CB-2 to CB-1 [57] Hint: Peaked at 593.94' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = Secondary = 8.995 ac, 28.42% Impervious, Inflow Depth = 1.81" for 2 yr event 9.82 cfs@ 12.09 hrs, Volume= 1.357 af 9.82 cfs@ 12.09 hrs, Volumes 1.357 af, Atten= 0%, Lag= 0.0 min 3.84 cfs@ 12.09 hrs, Volumes 1.210 af 5.98 cfs@ 12.09 hrs, Volumes 0.146 af Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 593.94' @ 12.09 hrs Device Routing Invert Outlet Devices #1 Primary 590.00' 12.0" Round Culvert L= 330.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Inverts 590.00' / 578.00' S= 0.0364 T Cn= 0.900 n= 0.025 Corrugated metal #2 Secondary 593.75' 30.0’ long x 10.0’ breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.49 2.56 2.70 2.69 2.68 2.69 2.67 2.64 Primary OutFlow Max=3.84 cfs @ 12.09 hrs HW=593.94' TW=578.83' (Dynamic Tailwater) 1=Culvert (Barrel Controls 3.84 cfs @ 4.89 fps) Secondary OutFlow Max=5.97 cfs @ 12.09 hrs HW=593.94' TW=590.34' (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir (Weir Controls 5.97 cfs @ 1.07 fps) Pond 10P: CB-2 to CB-1 Hydrograph ■ Inflow □ Outflow B Primary B Secondary --,l 0 R? rfs ; 9.82 cfs - Inf low Arrea-8.995 ac Peak Eleiv=593i94< % !i _ i_ _ i_ 5.98 c s2 .L _ _ l__ I__ L 3 _ cfs vrv. 0- m 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 27 28 29 30 Time (hours) —i I ___L _ L