Hardy Bridge is a Warren through truss, three-span, two-lane bridge in the western United States. It crosses the Missouri River and is located at milepost 6 on Old U.S. Route 91, about fourteen miles southwest of Cascade, Montana, which is southwest of Great Falls.
Constructed 91 years ago in 1931, it was one of many similar bridges built during a great expansion of bridges and roadways in the state of Montana. It was added to the National Register of Historic Places on January 4, 2010.
Hardy Bridge is named for the unincorporated small community of Hardy, which is about two miles downstream from the bridge below the Pine Island Rapids.
Wikipedia https://en.wikipedia.org/wiki/Hardy_Bridge
Address 2573 Old US Highway 91, 59421, United States
Coordinates 47°10'1.251" N -111°50'3.937" E