Owner | Manager | From | Until | Pittsburgh Steamship Company - Duluth, Minnesota, United States | | 1906/09 | 1953 |
United States Steel Corporation - USA | | 1953 | 1965/09 |
Kinsman Marine Transit Company - Cleveland, Ohio, USA | | 1965/09 | 1979 |
Seaway Terminal Company - Port Huron, Michigan, USA | | 1979 | 1989/10 |
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Fleet | From | Until | Pittsburgh Steamship Company - Duluth, Minnesota | 1948/08 | 1951/07 |
United States Steel Corporation | 1951/07 | 1967 |
Kinsman Marine Transit Company - Cleveland, Ohio | | 1979 |
Seaway Terminal Company - Port Huron, Michigan | | 1989 |
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