| Owner | Manager | From | Until |  | Mutual Steamship Company - Duluth, Minnesota | G.A. Tomlinson | 1908/06 | 1916/11/04 |  
| Headwater Steamship Company - Cleveland, Ohio | Harvey H. Brown & Company | 1916/11/04 | 1928 |  
| Stewart Furnace Company |  | 1928 | 1929 |  
| Youngstown Steamship Company - Cleveland Ohio | Pickands Mather & Company | 1929 | 1930 |  
| Interlake Steamship Company |  | 1930 | 1963 |  
| Marine Salvage, Ltd. - Port Colborne, Ontario |  | 1963 | 1964 |  
| Hindman Transportation Company - Owen Sound, Ontario |  | 1964 | 1978/12 |  
| Quebec & Ontario Transportation Company, Thorold, Ontario |  | 1978/12 | 1981 |  
 
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| Fleet | From | Until |  | Interlake Steamship Company - Cleveland, Ohio | 1930 | 1963 |  
| Hindman Transportation Company Ltd. - Owen Sound, Ontario | 1964 | 1978/12 |  
| Quebec & Ontario Transportation Company - Thorold, Ontario | 1978/12 | 1981 |  
 
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