Apr 03 2019 he refers to the 1995 closing at the west end of the up of the white pine copper mine which employed 3000 workers at its peak in the 1970s ontonagon county site of the mine
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Apr 03 2019 he refers to the 1995 closing at the west end of the up of the white pine copper mine which employed 3000 workers at its peak in the 1970s ontonagon county site of the mine
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Read MoreOct 04 2017 the mining leases date back to 1966 before the federal government established safety and environmental review standards which now apply to mining lease locations twin metals applied for the lease renewal in 2012 a different mining company polymet mining applied for a new coppernickel sulfide mining permit near the wilderness area
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Read MoreApr 17 2020 these midsize base metal producers are beginning to look fragile with expanding copper mines but nearly 19 billion of total debt between them
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Read MoreThe united states buys copper from chiles escondido copper mine the copper is used to make wiring for the us telecommunications industry and for many other purposes for the us the copper is an example of an
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Read MoreThe united states buys copper from chiles escondido copper mine the copper is used to make wiring for the us telecommunications industry and for many other purposes for the us the copper
Read MoreNov 02 2011 revett is mining the troy silvercopper mine in northwestern montana in the third quarter of 2011 revett mined 1 moz silver net of copper production it also has the worldclass rock creek deposit a few miles to the south of troy rock creek is currently in the courts due to environmental opposition it contains 229 moz silver and 202 blb of
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