The land just south of Lake Ontario in Western New York is relatively flat, with dirt and clay glacial drumlins creating most of the relief. Waterfalls in this basin, that traverse large rock escarpments, such as Holley, Waterport and Wolcott Falls, are rarities. The glen that contains Holley Falls, was actually carved out long ago by Sandy Creek as it cut along a north-south ridge east of present-day Holley. The natural waterfall that most-likely led the excavation of the glen has since receded over a mile south to the crossing at S Holley Road, where a dam taps it for power-generation. Although the glen’s origins predate history, Holley Canal Falls’ beginnings can be traced back to about 1918, with the construction of the Barge Canal.