| | Owner | Manager | From | Until |  | Pittsburgh Steamship Company - Duluth, Minnesota |  | 1942/06 | 1951/07 |  | United States Steel Corporation - USA |  | 1951/07 | 1967 |  | United States Steel Great Lakes Fleet - USA |  | 1967 | 1991 |  | New Management Enterprises Inc. - USA | Inland Lakes Management - Alpena, Michigan, USA | 1991 |  | 
 | | Fleet | From | Until |  | United States Steel - Great Lakes Fleet - Duluth, Minnesota | 1951/07 | 1991 |  | Inland Lakes Management Inc. - Alpena, Michigan | 1991 |  | 
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