29906 15 Ridgeway West Orange 5 26 26 HydroCAD Report

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13S 14S 16S ROOF WEST ROOF EAST Yard Areas to Rear Basin 1S 12R 15P Existing Conditions Study Point At Inlet Study Area Rear Yard Basin 17S 12S 12P Bypass Area Direct To PERMEABLE Front Yard Basin Inlet PAVEMENT TO THE INFILTRATION Subcat Reach Pond Link Routing Diagram for 29906 15 Ridgeway West Orange Second Submital 5-26-26 Prepared by Ensurplan Inc, Printed 5/26/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC

29906 15 Ridgeway West Orange Seco NOAA 24-hr D 2-Year-2020 Rainfall=3.47", P2=3.47" Prepared by Ensurplan Inc Printed 5/26/2026 HydroCAD® 10.20-8a s/n 11646 © 2025 HydroCAD Software Solutions LLC Page 1 Summary for Subcatchment 1S: Existing Conditions Study Area Runoff = 0.90 cfs @ 12.23 hrs, Volume= 0.091 af, Depth= 0.99" 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 2-Year-2020 Rainfall=3.47", 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 1 Runoff 0.90 cfs NOAA 24-hr D 2-Year-2020 Rainfall=3.47" P2=3.47" Runoff Area=48,267