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dc.contributor.authorPetersen, Max S.
dc.date1945-09
dc.date.accessioned2007-01-03T06:01:17Z
dc.date.available2007-01-03T06:01:17Z
dc.identifierlibimagesU651
dc.identifier.urihttp://hdl.handle.net/11124/6189
dc.descriptionDate scanned: 2002-6-11.
dc.descriptionUSBM #61623; Dredge working on tailings pile. Tamarack Reclamation plant, Calumet & Hecla Consolidated Copper Company, Calumet, Michigan. - M. S. Petersen - September 1945.
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.abstractA dredge brings up submerged tailings from copper milling for reprocessing at Torch Lake, Michigan. A reclamation plant was associated with the Tamarack Mining Company Mill, one of three mills sharing a site in Tamarack City (Tamarack Mills) near Torch Lake in Houghton County, Michigan. It has been estimated that over half of the 5 million tons of copper ore produced in the Keweenaw Peninsula was processed in this area. Mill tailings from the area's stamp mills and smelters were disposed of by dumping them into Torch Lake, eventually amounting to some 200 million tons of tailings. Reclamation, or reprocessing of the tailings by chemical means, was practiced by the copper industry starting in the 1910s. Waste sands from the mills were dredged from the lake bed and the reclamation plant processed them to recover the copper missed in the initial stamping process. The chemically treated tailings were then dumped back in the lake area. The Tamarack mill was in operation until 1917, after which the Calumet & Hecla Consolidated Copper Company acquired the properties and dismantled the mill in 1920. Other mills in the Torch Lake area continued to operate into the 1960s. The Tamarack reclamation plant was still in operation during the 1940s. Torch Lake was designated an EPA Superfund site in 1986.
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.rightsRights management statement available at: http://library.mines.edu/digital/rights.html
dc.subjectCalumet and Hecla Consolidated Copper Company
dc.subjectCopper ore processing plants
dc.subjectDredges and dredging
dc.subjectScenes, lake
dc.titleTamarack Reclamation plant
dc.typePhotograph
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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