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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 12 Summary for Subcatchment 12S: Slade Ave [49] Hint: Tc<2dt may require smaller dt Runoff = 1.33 cfs @ 11.99 hrs, Volume= 0.062 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 0.450 98 Paved parking, HSG D 0.450 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 30 0.0200 0.96 Sheet Flow, pavement Smooth surfaces n= 0.011 P2= 2.50" 0.4 60 0.0025 2.27 1.78 Pipe Channel, 12" pipe 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.013 Corrugated PE, smooth interior 0.9 90 Total Subcatchment 12S: Slade Ave Hydrograph Runoff 1.33 cfs NY-WestSeneca_NOAA14 24-hr S1 1-yr Rainfall=1.87" Runoff Area=0.450 ac Runoff Volume=0.062 af 1 Runoff Depth=1.65" Flow Length=90' Tc=0.9 min Flow (cfs) CN=98 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Time (hours) Page 747 of 1174