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WEST SENECA - POST DEVELOPMENT E_App E_Post-Development Model_REV 2 NY-West Seneca 24-hr S1 1-yr Rainfall=1.82" Prepared by Labella Associates Printed 7/26/2026 HydroCAD® 10.20-6a s/n 09581 © 2024 HydroCAD Software Solutions LLC Page 9 Pond BIO-3: Filtration Bioretention Peak Elev=595.48' Storage=1,854 cf Inflow=1.32 cfs 0.067 af Primary=0.03 cfs 0.067 af Secondary=0.00 cfs 0.000 af Tertiary=0.00 cfs 0.000 af Outflow=0.03 cfs 0.067 af Pond CH-1: Chambers Peak Elev=592.21' Storage=7,377 cf Inflow=5.27 cfs 0.276 af Outflow=0.38 cfs 0.229 af Total Runoff Area = 16.122 ac Runoff Volume = 0.857 af Average Runoff Depth = 0.64" 81.07% Pervious = 13.071 ac 18.93% Impervious = 3.052 ac Page 476 of 1174