History

The first settler arrived around 1788.

Perspective map of Luzerne (now Lake Luzerne, New York) and Hadley from 1888 with list of landmarks by L.R. Burleigh

The town was formed from parts of the Towns of Greenfield and Northumberland in 1801. The Town of Corinth was taken from Hadley in 1818, and the Town of Day was removed in 1819, bringing the Town of Hadley to its current dimensions.

In 1930, the Conklingville Dam by the west town line helped create the Sacandaga Reservoir and controlled flooding.

The Hadley Mountain Fire Observation Station and Hadley Parabolic Bridge are listed on the National Register of Historic Places.[5]

Geography

According to the United States Census Bureau, the town has a total area of 41.1 square miles (106 km2), of which 39.8 square miles (103 km2) is land and 1.3 square miles (3.4 km2) (3.26%) is water.

The town is located within the Adirondack Park. The northern and eastern town lines are the border of Warren County.

A small part of the eastern end of the Great Sacandaga Lake (formerly the "Sacandaga Reservoir") is by the western town line and the Sacandaga River divides the town laterally and enters the Hudson River by the eastern town boundary.

New York State Route 9N passes through the southeastern part of Hadley.