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dc.contributor.authorPetersen, Max S.
dc.contributor.institutionArthur Lakes Library
dc.contributor.institutionRussell L. and Lyn Wood Mining History Archive
dc.contributor.institutionUnited States. Bureau of Mines
dc.date1945-04
dc.date.accessioned2007-01-03T06:00:50Z
dc.date.available2007-01-03T06:00:50Z
dc.descriptionDate scanned: 2002-5-22.
dc.descriptionUSBM #60042; Tilden open-cut before blast on April 11, 1945, Tilden (open-cut) Mine, Cleveland-Cliffs Iron Company, Ishpeming, Marquette County, Michigan. (April 1945 - M.S.P.).
dc.descriptionHeld in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.
dc.descriptionDonor: United States Bureau of Mines.
dc.description.abstractThe Tilden pit mine in Ishpeming was being worked by 1930. The Tilden open pit operations started by the Cleveland-Cliffs Iron Company in the early 1970s produced iron ore for pellets. Cleveland-Cliffs Iron Company was formed with the merger of two major iron mining companies on Michigan's Marquette Range in 1891. The Company had a number of mines operating in the Upper Peninsula by the outbreak of World War I. By the 1940s the high grade iron ores mined underground were becoming depleted. The Company developed a process to concentrate low grade ores into iron ore pellets in the 1950s, and C.C.I.C.'s last underground iron mine closed in 1979.
dc.identifierlibimagesU483a
dc.identifier.urihttp://hdl.handle.net/11124/5880
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.rightsRights management statement available at: http://library.mines.edu/digital/rights.html
dc.subjectCleveland-Cliffs Iron Company
dc.subjectBlasting
dc.subjectIron mines and mining
dc.subjectOpen pit mining
dc.titleTilden Mine before blast
dc.typeStillImage


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