The Economic Times

In 1887, Michigan began building a railway bridge that could open in different ways for passing ships; three bridge designs worked together in one crossing

The Sault Ste. Marie International Railroad Bridge, completed in 1887, features a combination of four bridge designs. This structure was upgraded multiple times to accommodate larger ships navigating the Soo Locks, which remain crucial for iron ore transport. It is noteworthy that the bridge has never been widely recognized despite its engineering significance. Engineers added a swing section in 1895 and a vertical lift section by 1959.