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WEST SENECA - POST DEVELOPMENT E_App E_Post-Development Model_REV 2 NY-West Seneca 24-hr S1 100-yr Rainfall=5.22" Prepared by Labella Associates Printed 7/26/2026 HydroCAD® 10.20-6a s/n 09581 © 2024 HydroCAD Software Solutions LLC Page 63 Pond BIO-3: Filtration Bioretention Peak Elev=596.25' Storage=4,357 cf Inflow=4.57 cfs 0.267 af Primary=0.04 cfs 0.120 af Secondary=3.20 cfs 0.140 af Tertiary=0.00 cfs 0.000 af Outflow=3.24 cfs 0.260 af Pond CH-1: Chambers Peak Elev=595.88' Storage=22,228 cf Inflow=14.93 cfs 0.916 af Outflow=2.37 cfs 0.869 af Total Runoff Area = 16.122 ac Runoff Volume = 4.580 af Average Runoff Depth = 3.41" 81.07% Pervious = 13.071 ac 18.93% Impervious = 3.052 ac Page 530 of 1174