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Five businessmen founded the Minnesota Mining and Manufacturing Company as a mining venture in Two Harbors, Minnesota, making their first sale on June 13, 1902. [1] The goal was to mine corundum, a crystalline form of aluminium oxide, which failed because the mine's mineral holdings were anorthosite, a feldspar which had no commercial value.
Twin Metals LLC is seeking approval to create and operate a copper sulfide mine near Ely, Minnesota, on Superior National Forest land. There has been significant opposition to the proposed mine, most notably because of its proximity to the Boundary Waters Canoe Area Wilderness, location within a watershed that drains into the BWCA, and the air, water, light and noise pollution and traffic ...
The building was the location where John Dwan, a Two Harbors attorney drew up the incorporation papers for the Minnesota Mining and Manufacturing Company (now 3M) in 1902. The new company's vision was to mine and process corundum that the founders believed was plentiful on Lake Superior's north shore. The company nearly went bankrupt, because ...
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This is a list of the largest mining companies in terms of revenue (in US billion dollars) as ranked by Investopedia in 2023. [1] ... Aluminum Corporation of China ...
The $1 billion open-pit mine near Babbitt and processing plant near Hoyt Lakes would be Minnesota's first copper-nickel mine. Long-delayed Minnesota copper-nickel mining project wins a round in ...
The Hull–Rust–Mahoning Open Pit Iron Mine in Hibbing, Minnesota, United States, is the largest operating open-pit iron mine in Minnesota. The pit stretches more than three miles (5 km) long, two miles (3 km) wide, and 535 feet (163 m) deep. [2]
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