Upper Twin Falls Bridge, Road bridge in Breitung Township, United States.
The Upper Twin Falls Bridge is a road bridge that crosses the Menominee River, connecting Breitung Township in Michigan with Florence County in Wisconsin through a single-span design. The structure features a camelback through-truss design with pin connections.
The bridge was built in 1910 to support the development of a downstream dam, with both counties sharing the cost. It remained open to vehicle traffic until September 1971, when authorities closed it and transferred ownership to the Dickinson County Road Commission.
The monument at the north end honors Gilbert Carpenter, who oversaw the construction and later died in World War I. This location reflects how two states worked together on shared infrastructure during the region's industrial development.
Since the bridge has been closed to vehicle traffic since 1971, visitors can only explore it on foot and view the structure from above. The best time to visit is outside winter months, when snow and ice do not interfere with access.
The bridge spans the river about 4 miles north of Iron Mountain and is one of the few remaining examples of camelback through-truss design with pin connections in the region. This specific connection system was an advanced construction method used on only a handful of bridges during the early 1900s.
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