Double-Span Metal Pratt Truss Bridge is a historic Pratt truss bridge

Truss bridge

A truss bridge is a bridge composed of connected elements which may be stressed from tension, compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges...

 over the Ausable River at Keeseville

Keeseville, New York

Keeseville is a village in both Clinton County, New York and in Essex County, New York in the United States. The population was 1,815 at the 2010 census. The village is named after the Keese family....

 in Clinton County

Clinton County, New York

Clinton County is a county located in the U.S. state of New York. As of the 2010 census, the population was 82,128. Its name is in honor of the first Governor of New York as a state, George Clinton. Its county seat is Plattsburgh.-History:...

 and Essex County, New York

Essex County, New York

Essex County is a county located in the U.S. state of New York. As of the 2010 census, the population was 39,370. Its name is from the English county of Essex. Its county seat is Elizabethtown...

. It was built in 1877 by the Murray Dougal & Company of Milton, Pennsylvania

Milton, Pennsylvania

Milton is a borough in Northumberland County, Pennsylvania, on the Susquehanna River, north of Harrisburg. Settled in 1770, it was incorporated in 1817, and is governed by a charter that was revised in 1890...

. It is 214 feet in length and 16 feet wide. It consists of two 107 foot spans supported by a pier at mid-stream. It is the oldest extant example of a metal Pratt truss bridge in New York State.

It was listed on the National Register of Historic Places

National Register of Historic Places

The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

in 1999.