| | Owner | Manager | From | Until |  | Port Weller Drydocks Ltd. | Upper Lakes & St. Lawrence Transportation Company | 1958/07 | 1972 |  | Upper Lakes Shipping Ltd. |  | 1972 | 1986 | 
 | | Fleet | From | Until |  | Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario | 1958/07 | 1981/12/10 | 
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