This is one of the places that I actually need to visit.
The William G. Mather was built by the Great Lakes Engineering Works in Ecorse, MI. She was launched in 1925. She was originally powered by a coal fired quadruple expansion engine but that was replaced with a steam turbine in 1954.
She served as the flagship of the Cleveland Cliffs Corporation and named for their president at the time. She was the first Great Lakes ship to be equipped with radar. She was called "The Ship that Cleveland Built" because she called on Cleveland so much with her ore deliveries.
She was retired by Cleveland Cliffs in 1980 and in 1987 she was donated to the Museum.