South Washington Street Parabolic Bridge
Encyclopedia
South Washington Street Parabolic Bridge is a historic Lenticular truss
Truss
In architecture and structural engineering, a truss is a structure comprising one or more triangular units constructed with straight members whose ends are connected at joints referred to as nodes. External forces and reactions to those forces are considered to act only at the nodes and result in...

 bridge located at Binghamton
Binghamton, New York
Binghamton is a city in the Southern Tier of New York in the United States. It is near the Pennsylvania border, in a bowl-shaped valley at the confluence of the Susquehanna and Chenango Rivers...

 in Broome County, New York
Broome County, New York
Broome County is a county located in the U.S. state of New York. As of the 2010 census, the population was 200,600. It was named in honor of John Broome, who was lieutenant governor in 1806 when Broome County was established. Its county seat is Binghamton, which is also its major city. The current...

. It was constructed in 1886 and spans the Susquehanna River
Susquehanna River
The Susquehanna River is a river located in the northeastern United States. At long, it is the longest river on the American east coast that drains into the Atlantic Ocean, and with its watershed it is the 16th largest river in the United States, and the longest river in the continental United...

. It is composed of three identical through trusses with an overall length of 484 feet. The bridge was closed to vehicular traffic in 1969. It is the longest multiple span, Lenticular truss bridge constructed in New York State during the 19th century. It was constructed by the Berlin Iron Bridge Company of East Berlin, Connecticut
East Berlin, Connecticut
East Berlin is a section of the town of Berlin in Hartford County, Connecticut, United States. It is the site of the Berlin Fair, an agricultural fair.-The Berlin Fair:...

.
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 1978.
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