29906 15 Ridgeway West Orange 5 26 26 HydroCAD Report

29906 15 Ridgeway West Orange Se NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Prepared by Ensurplan Inc Printed 5/26/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 55 Summary for Pond 15P: Rear Yard Basin Inflow Area = 0.636 ac, 34.80% Impervious, Inflow Depth = 7.06" for 100-Year-2020 event Inflow = 2.79 cfs @ 12.09 hrs, Volume= 0.374 af Outflow = 2.12 cfs @ 12.39 hrs, Volume= 0.374 af, Atten= 24%, Lag= 17.8 min Primary = 2.12 cfs @ 12.39 hrs, Volume= 0.374 af Routed to Reach 12R : Study Point At Inlet Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Peak Elev= 564.80' @ 12.39 hrs Surf.Area= 1,526 sf Storage= 2,826 cf Plug-Flow detention time= 68.3 min calculated for 0.374 af (100% of inflow) Center-of-Mass det. time= 68.3 min ( 858.6 - 790.3 ) Volume Invert Avail.Storage Storage Description #1A 562.00' 1,388 cf 20.50'W x 74.43'L x 3.50'H Field A 5,341 cf Overall - 1,871 cf Embedded = 3,470 cf x 40.0% Voids #2A 562.50' 1,871 cf Cultec R-300HD x 40 Inside #1 Effective Size= 45.6"W x 30.0"H => 6.53 sf x 7.08'L = 46.2 cf Overall Size= 51.0"W x 30.0"H x 7.54'L with 0.46' Overlap 40 Chambers in 4 Rows Cap Storage= 2.7 cf x 2 x 4 rows = 21.2 cf 3,259 cf Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 562.00' 2.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 563.80' 8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Primary 564.40' 8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.12 cfs @ 12.39 hrs HW=564.80' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.27 cfs @ 7.91 fps) 2=Orifice/Grate (Orifice Controls 1.38 cfs @ 3.94 fps) 3=Orifice/Grate (Orifice Controls 0.48 cfs @ 2.16 fps)