The West Swanzey Covered Bridge, also known as the Thompson Bridge, is a historic wooden covered bridge that carries Main Street over the Ashuelot River in West Swanzey, New Hampshire.

The two-span Town lattice truss bridge was built in 1832 by Zadoc Taft for the town for $523.27. It is 136 feet 10 inches long, with spans measuring 64 feet and 63 feet 6 inches, and rests on a stone central pier and abutments. It has an overall width of 25 feet 6 inches with a roadway width of 16 feet 7 inches and a maximum vertical clearance of 11 feet 11 inches. There is a sidewalk on the south side of the bridge.

Unusual for surviving covered bridges, the bridge occupies a central location in the village of West Swanzey, and was originally equipped with two sidewalks (it now has only one). In 1973, the bridge was posted with a six-ton limit, requiring school buses to empty before they could cross the bridge and then reboard on the other side. In 1976, a new concrete and steel bridge was built nearby to carry heavy vehicles. This new bridge cost $376,914.61. The bridge has been closed to vehicular traffic since the fall of 1990 after a report by state inspectors indicated the bridge was unsafe.

The Swanzey Historical Museum has a collection of historical material relating to all the covered bridges in town, including a scale model of the West Swanzey Bridge. A highway committee was formed in 1990 to develop proposals for the rehabilitation of the town's covered bridges.

Of the 400 covered bridges that once stood in the state of New Hampshire, as of 2019, only 54 remain.

The Thompson Bridge was listed on the National Register of Historic Places in 1980.

Located at:  N42 52.318   W72 19.682        -        WGCB #29-03-04

Photographed in July of 2019

Photos by Millard Farmer