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WEST SENECA - PRE DEVELOPMENT D_App D_Pre-Development Model_REV 1 Prepared by Labella Associates Printed 7/26/2026 HydroCAD® 10.20-6a s/n 09581 © 2024 HydroCAD Software Solutions LLC Page 3 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1-yr NY-West Seneca 24-hr S1 1-yr Default 24.00 1 1.82 2 2 10-yr NY-West Seneca 24-hr S1 10-yr Default 24.00 1 3.14 2 3 100-yr NY-West Seneca 24-hr S1 100-yr Default 24.00 1 5.22 2 Page 446 of 1174