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| Fleet | From | Until | | Shenango Furnace Company - Pittsburgh, PA | | 1957 |
| American Steamship Company - Buffalo, New York | 1912/05 | 1963 |
| Wilson Transit Company - Cleveland, Ohio | | 1972 |
| Kinsman Marine Transit Company - Cleveland, Ohio | | 1975 |
| Soo River Company - Mississauga, Ontario | | 1982 |
| P&H Shipping Company - Mississauga, Ontario | | 1984 |
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