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

Ausable River Au Sable or Ausable may refer to various places: Michigan *Au Sable Township, Iosco County, Michigan **Au Sable, Michigan, an unincorporated community in the above township *Au Sable Township, Roscommon County, Michigan New York *Au Sable, New Y ...

at Keeseville in

Clinton County Clinton County may refer to: *Counties named for George Clinton, first and third Governor of New York, and later the fourth Vice President of the United States: **Clinton County, New York **Clinton County, Ohio *Counties named for DeWitt Clinton, s ...

and

Essex County, New York Essex County is a county in the U.S. state of New York. As of the 2020 census, the population was 37,381. Its county seat is the hamlet of Elizabethtown. Its name is from the English county of Essex. Essex is one of only 2 counties that are ...

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

Milton, Pennsylvania Milton is a borough in Northumberland County, Pennsylvania, United States, on the West Branch Susquehanna River, north of Harrisburg, located in Central Pennsylvania's Susquehanna River Valley. It is approximately 10 miles upriver from the mouth ...

. 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 A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or ...

bridge in New York State. The bridge carries Liberty Street over the Ausable River between Ausable Street and River River. It was listed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

in 1999. In 2008 it was closed, and was in anticipation of repairs.River Street over Ausable River (UglyBridges.com)
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References

Bridges in Clinton County, New York Bridges in Essex County, New York Bridges completed in 1877 Road bridges on the National Register of Historic Places in New York (state) National Register of Historic Places in Clinton County, New York National Register of Historic Places in Essex County, New York Metal bridges in the United States Pratt truss bridges in the United States 1877 establishments in New York (state) {{NewYork-bridge-struct-stub