Tamarack mine
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Tamarack mine is a copper mine located in Osceola Township, Houghton County, north of Calumet, Michigan. The first shaft was started in 1882 and five shafts were eventually mined. In 1966 seven-year-old Ruth Ann Miller fell into shaft #4 and a rescue was impossible.
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47°15′36″N 88°27′32″W/47.260°N 88.459°W/ 47.260; -88.459