Hadley Parabolic Bridge, Iron truss bridge in Hadley, United States
The Hadley Parabolic Bridge spans 181 feet across the Sacandaga River with a distinctive lenticular truss design made of wrought iron and pin connections.
Constructed in 1885 by the Berlin Iron Bridge Company for $6,000, this structure replaced an earlier bridge from 1813 at the same location.
The bridge represents a period of industrial innovation in American engineering, as demonstrated by William O. Douglas's patented lenticular truss design from 1878.
Following extensive restoration in 2006 funded by federal and state grants, the bridge now accommodates single-lane vehicular traffic without load restrictions.
Among the three iron semi-deck lenticular truss bridges ever built, the Hadley Parabolic Bridge stands as the only surviving example in New York State.
Location: Hadley
Official opening: 1885
GPS coordinates: 43.31390,-73.84470
Latest update: September 23, 2025 16:45
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