J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) West Orange HydroCAD_Post NOAA 24-hr D 100-Year_Current Rainfall=9.23", P2=3.45" Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Printed 5/13/2024 Page 236 Summary for Pond 13P: SD-25, SD-26 Inflow Area = 1.863 ac, 27.41% Impervious, Inflow Depth > 7.61" for 100-Year_Current event Inflow = 3.61 cfs @ 12.36 hrs, Volume= 1.181 af Outflow = 3.61 cfs @ 12.36 hrs, Volume= 1.181 af, Atten= 0%, Lag= 0.1 min Primary = 3.61 cfs @ 12.36 hrs, Volume= 1.181 af Routed to Pond 8P : O-1B Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 581.41' @ 12.36 hrs Surf.Area= 0.001 ac Storage= 0.000 af Plug-Flow detention time= 0.0 min calculated for 1.181 af (100% of inflow) Center-of-Mass det. time= 0.0 min ( 877.9 - 877.9 ) Volume #1 Device #1 Invert 580.69' Routing Primary Avail.Storage 0.007 af Invert 580.44' Storage Description 15.0" Round SD-25 L= 262.4' S= 0.0150 '/' Outlet Devices 18.0" Round SD-26 L= 29.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 580.44' / 580.15' S= 0.0099 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight & clean, Flow Area= 1.77 sf Primary OutFlow Max=3.61 cfs @ 12.36 hrs HW=581.41' TW=0.00' (Dynamic Tailwater) 1=SD-26 (Barrel Controls 3.61 cfs @ 4.25 fps)