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WEST SENECA - POST DEVELOPMENT E_App E_Post-Development Model_REV 2 NY-West Seneca 24-hr S1 25-yr Rainfall=3.84" Prepared by Labella Associates Printed 7/26/2026 HydroCAD® 10.20-6a s/n 09581 © 2024 HydroCAD Software Solutions LLC Page 36 Pond BIO-3: Filtration Bioretention Peak Elev=596.11' Storage=3,881 cf Inflow=3.24 cfs 0.184 af Primary=0.04 cfs 0.116 af Secondary=0.99 cfs 0.061 af Tertiary=0.00 cfs 0.000 af Outflow=1.03 cfs 0.177 af Pond CH-1: Chambers Peak Elev=594.31' Storage=17,647 cf Inflow=10.97 cfs 0.655 af Outflow=0.71 cfs 0.608 af Total Runoff Area = 16.122 ac Runoff Volume = 2.949 af Average Runoff Depth = 2.20" 81.07% Pervious = 13.071 ac 18.93% Impervious = 3.052 ac Page 503 of 1174