Report 4 13 2026

29906 15 Ridgeway West Orange Final NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 29 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.05 cfs @ 12.13 hrs, Volume= 0.005 af, Depth= 6.13" Routed to Reach 12R : Study Point At Inlet Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" Area (sf) CN Description * 384 98 Misc Impervious To Rear Property 384 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.8 65 0.0600 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 4.09" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.06 0.05 cfs Runoff 0.055 0.05 NOAA 24-hr D 0.045 10-Year-2050 Rainfall=6.37" P2=4.09" 0.04 Runoff Area=384 sf 0.035 Runoff Volume=0.005 af Flow (cfs) 0.03

Runoff Volume=0.005 af Flow (cfs) 0.03 Runoff Depth=6.13" 0.025 Flow Length=65' 0.02 Slope=0.0600 '/' 0.015 Tc=5.8 min 0.01 CN=98 0.005 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours)