Report 4 13 2026

29906 15 Ridgeway West Orange Final NOAA 24-hr D 2-Year-2020 Rainfall=3.47", P2=3.47" Prepared by Ensurplan Inc Printed 4/20/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Runoff = 0.03 cfs @ 12.13 hrs, Volume= 0.002 af, Depth= 3.24" 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 2-Year-2020 Rainfall=3.47", P2=3.47" 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) 6.3 65 0.0600 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" Subcatchment 13S: Bypass Infiltration, Overland to Study Point at Inlet Hydrograph 0.032 0.03 0.03 cfs Runoff 0.028 0.026 NOAA 24-hr D 0.024 2-Year-2020 Rainfall=3.47" 0.022 P2=3.47" 0.02 Runoff Area=384 sf Flow (cfs) 0.018 Runoff Volume=0.002 af 0.016

a=384 sf Flow (cfs) 0.018 Runoff Volume=0.002 af 0.016 0.014 Runoff Depth=3.24" 0.012 Flow Length=65' 0.01 Slope=0.0600 '/' 0.008 Tc=6.3 min 0.006 0.004 CN=98 0.002 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)