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24-4113 WEST SENECA EXCAHNGE NY-WestSeneca_NOAA14 24-hr S1 1-yr Rainfall=1.87" Prepared by Carmina Wood Design Printed 7/13/2026 HydroCAD® 10.20-7a s/n 05019 © 2025 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 14S: Proposed - East [47] Hint: Peak is 114% of capacity of segment #3 Runoff = 18.18 cfs @ 12.02 hrs, Volume= 0.927 af, Depth= 1.65" Routed to Pond 18P : POND Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-150.00 hrs, dt= 0.01 hrs NY-WestSeneca_NOAA14 24-hr S1 1-yr Rainfall=1.87" Area (ac) CN Description 4.420 98 Paved parking, HSG D 2.190 98 Roofs, HSG D 0.150 80 >75% Grass cover, Good, HSG D 6.760 98 Weighted Average 0.150 2.22% Pervious Area 6.610 97.78% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.8 100 0.0100 0.92 Sheet Flow, PVMT Smooth surfaces n= 0.011 P2= 2.50" 0.7 90 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.3 700 0.0050 5.09 16.00 Pipe Channel, PIPE 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.013 Concrete pipe, bends & connections 4.8 890 Total Page 749 of 1174