| Owner | Manager | From | Until | | Abitibi Power & Paper Company - Iroquois Falls, Ontario, Canada | | 1938 | 1971 |
| S&J Tug Company - Sarnia, Ontario, Canada | | 1971 | 1972 |
| Stanley P. Goodfellow Construction Ltd. - Sarnia, Ontario, Canada | | 1972 | 1974 |
| NcNamara Construction Ltd. - Toronto, Ontario, Canada | | 1974 | 1988/12/31 |
| Balfour Beatty Ltd. - Cayman Islands | | 1988/12/31 | 1996 |
| A&J Towing - Lockport, Louisiana, USA | | 1996 | 1998/02 |
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