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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 48 Summary for Link 12L: COSTCO Inflow Area = 21.223 ac, 78.41% Impervious, Inflow Depth = 3.43" for 25-yr event Inflow = 119.16 cfs @ 12.03 hrs, Volume= 6.071 af Primary = 119.16 cfs @ 12.03 hrs, Volume= 6.071 af, Atten= 0%, Lag= 0.0 min Routed to Pond 18P : POND Primary outflow = Inflow, Time Span= 0.00-150.00 hrs, dt= 0.01 hrs 25-yr Primary Outflow Imported from COSTCO HYDROCAD 2026-04-13~Link 16L.hce Link 12L: COSTCO Hydrograph Inflow 119.16 cfs Primary 130 119.16 cfs Inflow Area=21.223 ac 120 25-yr Primary Outflow Imported from 110 COSTCO HYDROCAD 2026-04-13~Link 16L.hce Area= 924,495 sf 100 78.41% Imperv. 90 80 Flow (cfs) 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Time (hours) Page 783 of 1174