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dc.date1944
dc.date.accessioned2007-01-03T06:00:12Z
dc.date.accessioned2022-02-03T09:23:00Z
dc.date.available2007-01-03T06:00:12Z
dc.date.available2022-02-03T09:23:00Z
dc.identifierlibimagesU254
dc.identifier.urihttp://hdl.handle.net/11124/6457
dc.descriptionDate scanned: 2002-05-16.
dc.descriptionUSBM #57731; "Manual Blasting Switch" used at the Mather Mine. The Cleveland-Cliffs Iron Company, Ishpeming, Marquette County, Michigan. See also U252.
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 Mather Mine near Ishpeming was operated by the Cleveland-Cliffs Iron Company. It was the last underground iron mine operating in Michigan and finally closed in 1979. 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.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.subjectIron mines and mining
dc.subjectBlasting
dc.subjectUnderground mining
dc.titleManual Blasting Switch used at the Mather Mine
dc.typeStillImage
dc.contributor.institutionArthur Lakes Library
dc.contributor.institutionRussell L. and Lyn Wood Mining History Archive
dc.contributor.institutionUnited States. Bureau of Mines


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