Hadley Parabolic Bridge

Hadley Parabolic Bridge
Bridge from north, 2017
Coordinates	43°18′50″N 73°50′42″W / 43.31389°N 73.84500°W / 43.31389; -73.84500
Carries	CR 1 (Corinth Road)
Crosses	Sacandaga River
Locale	Hadley, NY, USA
Other name(s)	Hadley Bow Bridge
Maintained by	Saratoga County
Heritage status	U.S. NRHP# 77000981
ID number	000000002202740[1]
Characteristics
Material	Iron, timber
Total length	181 feet (55 m)[2]
Width	14 feet (4.3 m)[2]
Longest span	136 feet (41 m)[2]
No. of spans	2
Load limit	3 short tons (2.7 metric tons)
Clearance below	45 feet (14 m)[2]
History
Constructed by	Berlin Iron Bridge Company
Construction start	1885
Opened	1885
Statistics
Daily traffic	100
Location

The Hadley Parabolic Bridge, often referred to locally as the Hadley Bow Bridge, carries Corinth Road (Saratoga County Route 1) across the Sacandaga River in Hadley, New York, United States. It is an iron bridge dating from the late 19th century.

It is the only surviving iron semi-deck lenticular truss bridge in the state, and the only extant of three known to have been built.^{[citation needed]}} In 1977 it was listed on the National Register of Historic Places. Shortly afterwards it was closed to vehicular traffic, and at some time later to pedestrians as well.

The county had considered demolishing it, but held off after heavy lobbying from local preservation groups. In 2006 it was reconstructed and restored with federal and state grants, and reopened without any load restrictions.