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WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 40 Summary for Pond RCVR 2: RCVR 2 Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 1.08" for 1-yr event Inflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Outflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af, Atten= 0%, Lag= 0.0 min Primary = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Routed to Pond EX RCVR : EX RCVR Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.73' @ 12.02 hrs Device Routing Invert Outlet Devices #1 Primary 900.32' 8.0" Round RCVR 2 to EX RCVR L= 72.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.32' / 899.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.42 cfs @ 12.02 hrs HW=900.72' TW=900.02' (Dynamic Tailwater) 1=RCVR 2 to EX RCVR (Outlet Controls 0.42 cfs @ 2.78 fps) Pond RCVR 2: RCVR 2 RCVR 2 to EX RCVR