29906 15 Ridgeway West Orange 5 26 26 HydroCAD Report

29906 15 Ridgeway West Orange Seco NOAA 24-hr D 2-Year-2050 Rainfall=4.09", P2=4.09" Prepared by Ensurplan Inc Printed 5/26/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 57 Summary for Pond 15P: Rear Yard Basin Inflow Area = 0.636 ac, 34.80% Impervious, Inflow Depth = 2.45" for 2-Year-2050 event Inflow = 1.09 cfs @ 12.09 hrs, Volume= 0.130 af Outflow = 0.22 cfs @ 13.03 hrs, Volume= 0.130 af, Atten= 80%, Lag= 56.5 min Primary = 0.22 cfs @ 13.03 hrs, Volume= 0.130 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= 563.83' @ 13.03 hrs Surf.Area= 1,526 sf Storage= 1,901 cf Plug-Flow detention time= 94.1 min calculated for 0.130 af (100% of inflow) Center-of-Mass det. time= 94.0 min ( 895.6 - 801.5 ) 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=0.22 cfs @ 13.03 hrs HW=563.83' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.22 cfs @ 6.33 fps) 2=Orifice/Grate (Orifice Controls 0.00 cfs @ 0.62 fps) 3=Orifice/Grate ( Controls 0.00 cfs)