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24-4113 WEST SENECA EXCAHNGENY-WestSeneca_NOAA14 24-hr S1 25-yr Rainfall=4.10" Prepared by Carmina Wood Design Printed 7/13/2026 HydroCAD® 10.20-7a s/n 05019 © 2025 HydroCAD Software Solutions LLC Page 45 Summary for Pond 16P: OUTLET PIPE Inflow Area = 59.695 ac, 80.80% Impervious, Inflow Depth = 3.49" for 25-yr event Inflow = 109.83 cfs @ 12.05 hrs, Volume= 17.346 af Outflow = 109.83 cfs @ 12.05 hrs, Volume= 17.346 af, Atten= 0%, Lag= 0.0 min Primary = 109.83 cfs @ 12.05 hrs, Volume= 17.346 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= 607.58' @ 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=109.70 cfs @ 12.05 hrs HW=607.58' TW=0.00' (Dynamic Tailwater) 1=Culvert (Barrel Controls 109.70 cfs @ 7.54 fps) Pond 16P: OUTLET PIPE Hydrograph Inflow 109.83 cfs Primary 120 109.83 cfs 115 110 Inflow Area=59.695 ac 105 100 Peak Elev=607.58' 95 90 85 58.0" x 94.0" 80 75 Box Culvert Flow (cfs) 70 65 n=0.013 60 55 50 L=641.0' 45 40 S=0.0034 '/' 35 30 25 20 15 10 5 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Time (hours) Page 780 of 1174