| | Owner | Manager | From | Until |  | Commonwealth Steamship Company - Cleveland, Ohio | W.A. Hawgood | 1906/04/20 | 1914 |  | Scott Steamship Company - Cleveland, Ohio | M.A. Hanna & Company | 1914 | 1918/10/18 |  | Calumet Transportation Company - Cleveland, Ohio | M.A. Hanna & Company | 1918/10/18 | 1930 |  | Producers Steamship Company |  | 1930 | 1937 |  | National Steel Corporation |  | 1937 | 1946 |  | Midland Steamship Lines Inc. - Cleveland, Ohio |  | 1946 | 1962 |  | Comet Enterprises Ltd. - Thorold, Ontario |  | 1962 | 1973 |  | Marine Salvage Ltd. - Port Colborne, Ontario |  | 1973 | 1974 | 
 | | Fleet | From | Until |  | Calumet Transportation Company - Cleveland, Ohio |  | 1930 |  | Producers Steamship Company - Cleveland, Ohio |  | 1937 |  | National Steel Corporation - Cleveland, Ohio |  | 1946 |  | Commonwealth Steamship Company - Cleveland, Ohio |  | 1949/06 |  | Midland Steamship Lines, Inc. |  | 1962 |  | Comet Enterprises Ltd. - Montreal, Quebec |  | 1973 | 
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