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| Fleet | From | Until | | United States Transportation Company - Oswego, New York | | 1911 |
| Great Lakes Steamship Company - Cleveland, Ohio | | 1928 |
| Great Lakes Dredge & Dock Co. - Oak Brook, Illinois | | 1955 |
| Presque Isle Transportation Company - Cleveland, Ohio | | 1969 |
| Erie Sand Steamship Company - Erie, Pennsylvania | | 1988 |
| Gaelic Tugboat Company - Detroit, Michigan | | 1995 |
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