J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) West Orange HydroCAD_Post NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 276 Summary for Pond 23P: SD-01, SD-02 Inflow Area = 0.656 ac, 0.00% Impervious, Inflow Depth > 8.16" for 100-Year_Future event Inflow = 4.89 cfs @ 12.20 hrs, Volume= 0.446 af Outflow = 4.82 cfs @ 12.22 hrs, Volume= 0.444 af, Atten= 1%, Lag= 1.1 min Primary = 4.82 cfs @ 12.22 hrs, Volume= 0.444 af Routed to Pond 12P : SD-03, SD-04, SD-05 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 599.17' @ 12.22 hrs Surf.Area= 91 sf Storage= 204 cf Plug-Flow detention time= 4.9 min calculated for 0.444 af (100% of inflow) Center-of-Mass det. time= 2.2 min ( 815.3 - 813.1 ) Volume #1 #2 #3 Invert 602.00' 591.82' 598.38' Avail.Storage 5,354,109 cf 163 cf 25 cf #4 #5 598.06' 597.81' 118 cf 61 cf 5,354,476 cf Elevation (feet) 602.00 603.00 Surf.Area (sq-ft) 696,960 12,422,876 Elevation (feet) 591.82 602.00 Surf.Area (sq-ft) 16 16 Inc.Store (cubic-feet) 0 163 Cum.Store (cubic-feet) 0 163 Elevation (feet) 598.06 607.15 Surf.Area (sq-ft) 13 13 Inc.Store (cubic-feet) 0 118 Cum.Store (cubic-feet) 0 118 Device #1 Routing Primary Perim. (feet) 16.0 130.1 Storage Description Drainage Ditch Storage (Irregular)Listed below (Recalc) CB-1 (Prismatic) Listed below (Recalc) 12.0" Round SD-01 L= 31.6' S= 0.0100 '/' MH-01 (Prismatic) Listed below (Recalc) 12.0" Round SD-02 L= 78.0' S= 0.0100 '/' Total Available Storage Invert 597.04' Inc.Store (cubic-feet) 0 5,354,109 Cum.Store (cubic-feet) 0 5,354,109 Wet.Area (sq-ft) 696,960 698,289 Outlet Devices 12.0" Vert. SD-02 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=4.82 cfs @ 12.22 hrs HW=599.16' TW=597.17' (Dynamic Tailwater) 1=SD-02 (Orifice Controls 4.82 cfs @ 6.13 fps)