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 13 Summary for Subcatchment 1S: Existing Conditions Study Area Runoff = 5.34 cfs @ 12.22 hrs, Volume= 0.507 af, Depth= 5.49" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Area (sf) CN Description 48,267 70 Woods, Good, HSG C 48,267 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.5 170 0.0320 1.92 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 10.3 130 0.0270 0.21 Sheet Flow, Grass: Short n= 0.150 P2= 3.47" 2.4 167 0.0270 1.15 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 14.2 467 Total Subcatchment 1S: Existing Conditions Study Area Hydrograph Runoff 5.34 cfs NOAA 24-hr D 5 100-Year-2020 Rainfall=9.18" P2=3.47" 4

=9.18" P2=3.47" 4 Runoff Area=48,267 sf Runoff Volume=0.507 af Flow (cfs) 3 Runoff Depth=5.49" Flow Length=467' Tc=14.2 min 2 CN=70 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Time (hours)