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24-4113 WEST SENECA EXCAHNG NY-WestSeneca_NOAA14 24-hr S1 100-yr Rainfall=5.20" Prepared by Carmina Wood Design Printed 7/13/2026 HydroCAD® 10.20-7a s/n 05019 © 2025 HydroCAD Software Solutions LLC Page 59 Summary for Pond 16P: OUTLET PIPE Inflow Area = 59.695 ac, 80.80% Impervious, Inflow Depth = 4.57" for 100-yr event Inflow = 141.36 cfs @ 12.05 hrs, Volume= 22.734 af Outflow = 141.36 cfs @ 12.05 hrs, Volume= 22.734 af, Atten= 0%, Lag= 0.0 min Primary = 141.36 cfs @ 12.05 hrs, Volume= 22.734 af Routed to Link 13L : TOTAL Routing by Dyn-Stor-Ind method, Time Span= 0.00-150.00 hrs, dt= 0.01 hrs Peak Elev= 608.42' @ 12.05 hrs Flood Elev= 612.00' Device Routing Invert Outlet Devices #1 Primary 603.56' 58.0" W x 94.0" H Box Culvert L= 641.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 603.56' / 601.35' S= 0.0034 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 37.86 sf Primary OutFlow Max=141.28 cfs @ 12.05 hrs HW=608.42' TW=0.00' (Dynamic Tailwater) 1=Culvert (Barrel Controls 141.28 cfs @ 8.02 fps) Pond 16P: OUTLET PIPE Hydrograph Inflow 141.36 cfs Primary 150 141.36 cfs 140 Inflow Area=59.695 ac 130 Peak Elev=608.42' 120 110 58.0" x 94.0" 100 Box Culvert Flow (cfs) 90 80 n=0.013 70 L=641.0' 60 50 S=0.0034 '/' 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Time (hours) Page 794 of 1174