Union Covered Bridge State Historic Site

The covered bridge is a Burr-arch truss structure built in 1871 over the Elk Fork of the Salt River.

It was almost lost to neglect in the 1960s, but was added to the state park system in 1967, the same year it was damaged by a flood.

Repairs were made the next year, using timbers salvaged from another covered bridge that had been destroyed by the same flood.

It was closed to vehicular traffic in 1970 after it was damaged, likely by a truck bearing a heavy load that had detoured away from a low-water crossing.

The state historic site covers 1.24 acres (0.50 ha) and contains 0.2 miles (0.32 km) of roadway.

The Burr design uses multiple king posts and an arch to support the bridge's truss.

[9] The bridge has been described as barn-like, and local legend claims that the appearance helped farm animals be more willing to cross it.