Tamarack mine
Michigan, United States
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.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).