| Deruyter Lake is 2 miles long with an average width of 1/2 mile. It has an area of 626 acres, and when full contains 504,468,000 cubic feet of water.
Also call Tioughnioga Lake, it is 1,286 feet above the sea, higher than Lake George and nearly as high as Saranac. Since Deruyter lake is filled with the waters of the Tioughnioga river it is also known as Tioughnioga Lake.
The dam lies almost entirely in the Town of Cazenovia, Madison County, except the West end which is in the town of Fabius, Onondaga County. The dam at the North end is about one-fourth mile in length and is seventy-five feet deep at its lowest point. Its inclination is two to one on its face side and three to one on its back side. Its extreme width at its base is about 375 feet.
Water Level Committee. This committee works year-round with the Thruway Authority to control the water level of the lake, as directed by the membership. In the fall, the lake is lowered to minimize ice damage and to allow owners to perform shoreline maintenance. In the spring, the lake level is brought back to its crest elevation. As if dealing with agencies were not difficult enough, having to deal with nature makes maintaining the water level even more challenging.