Lyme–East Thetford Bridge, Road bridge across Connecticut River between Lyme, New Hampshire and East Thetford, Vermont, United States.
The Lyme-East Thetford Bridge is a steel structure spanning the Connecticut River between New Hampshire and Vermont using a Parker truss design. Two main spans support the roadway with vertical bracing members anchored to substantial supports on each bank.
The current structure was built in 1937 using Works Progress Administration funding after its predecessor from the 1890s was destroyed by flooding in 1936. The new design incorporated advances in bridge engineering methods of that era.
The bridge serves as a physical connection point between New Hampshire and Vermont communities, facilitating regular interactions between residents of both states.
The structure is regularly inspected and maintained to meet current safety standards for ongoing vehicle traffic. Visitors should note this is an active road connection with normal traffic flow.
This bridge holds the distinction of being the longest two-span Parker truss structure in New Hampshire and is one of only five similar designs crossing the Connecticut River. The steel framework with its distinctive latticed pattern offers a direct look at early-20th-century bridge engineering techniques.
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