| 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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