J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Type III 24-hr 100 yr Rainfall=8.72" Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/4/2012 Page 61 Summary for Pond 10P: CB-2 to CB-1 [57] Hint: Peaked at 594.18' (Flood elevation advised) Inflow Area = Inflow = Outflow = Primary = Secondary = 8.995 ac, 28.42% Impervious, Inflow Depth = 5.02" for 100 yr event 3.764 af 25.29 cfs@ 12.08 hrs, Volume= 3.764 af, Atten= 0%, Lag= 0.0 min 25.29 cfs @ 12.08 hrs, Volume= 2.950 af 3.84 cfs @ 11.78 hrs, Volume= 0.814 af 21.58 cfs @ 12.08 hrs, Volume= Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 594.18' @ 12.08 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 lnvert= 590.00' / 578.00' S= 0.0364 '/’ Cc= 0.900 n= 0.025 Corrugated metal #2 Secondary 30.0'long x 10.0'breadth 593.75' 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 @ 11.78 hrs HW=593.91' TW=578.85' (Dynamic Tailwater) 1=Culvert (Barrel Controls 3.84 cfs @ 4.89 fps) Secondary OutFlow Max=21.54 cfs @ 12.08 hrs HW=594.18' TW=590.71’ (Dynamic Tailwater) 2=Broad-Crested Rectangular Weir (Weir Controls 21.54 cfs @ 1.68 fps) Pond 10P: CB-2 to CB-1 Hydrograph -i— i r^r 93 r.fS : 25.29 cfs 23 26 24- 22 21.58 cfs LA nf ow Area=8.995 ac Peak Elev=594 .18* A 18- _ L. _ i2 16 14- u. 12- 1 2 34 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) ■ Inflow □ Outflow ■ Primary M Secondary