It has also been known as Old Bridge and was listed on the National Register of Historic Places in 1980.
The three center spans are Baltimore through trusses each 175 feet (53 m) long.
The longer span on the Fort Benton bank is a 225 feet (69 m)-long Camelback through truss bridge built after a 1908 flood destroyed a cantilevered swing span and its central pier.
The shortest span is a Pratt through truss which is 75 feet (23 m) long, on the far side from Fort Benton.
This article about a property in Montana on the National Register of Historic Places is a stub.