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The underground sulfide deposit, discovered in 2001, may also produce smaller volumes of copper, silver and lead. [3] The five key permits needed for the project to begin are a mining permit, an air permit, a water discharge permit, a wetland permit and a dam safety permit. [4] The state of Michigan issued a draft mine permit in 2016.
Name County Years Material Coordinates Adventure mine: Ontonagon: 1850–1920: copper: Alabastine Mine: Kent: 1907– gypsum: Arcadian mine: Houghton: 1898–1908: copper
Despite being a sandstone aquifer, it has a low permeability [36] and water largely moves through cracks and fissures which extend to a depth of about 100 to 150 ft (30 to 46 m). In 1985, 6.5 million US gallons (25,000 m 3 ) of freshwater were withdrawn per day for human use. [ 17 ]
Nov. 30—Except for the oil and natural gas themselves, one of the oilfield's hottest commodities these days is the sand used to fracture or "frac" the bedrock formations and loosen them up for ...
It began as an open pit quarry in 1886 due in part to its proximity to a railroad. Underground room and pillar mining began in 1936. Leased storage began in 1986. Used by the U.S. Department of Defense for storage of 10,000,000 MRE meals, by Bridgestone for storage of 400,000 tires, and by Controlled Pharming Ventures for growing tomatoes and corn.
Sand mining is the extraction of sand, mainly through an open pit (or sand pit) [1] [failed verification] [2] but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. [3] Sand is often used in manufacturing, for example as an abrasive or in concrete.
Stamp sand, photographed near Houghton, MI. Stamp sand is a coarse sand left over from the processing of ore in a stamp mill. [1] In the United States, the most well-known deposits of stamp sand are in the Copper Country of the Upper Peninsula of Michigan, where it is black or dark gray, and may contain hazardous concentrations of trace metals.
The Michigan Limestone and Chemical Company operated the world's largest limestone quarry (Michigan Limestone; a/k/a the "Calcite Quarry"; "Calcite Plant and Mill"; and "Carmeuse Lime and Stone"), which is located near Rogers City in Presque Isle County, Michigan. It was formed and organized in 1910; however, production did not begin until 1912.