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Resolution Copper has proposed to give the federal government 5,376 acres (21.76 km 2) of environmentally sensitive land in Arizona in exchange for the 2,422-acre (9.80 km 2) oak flat federal parcel, [12] which includes the Oak Flat Campground (protected since 1955) and several outdoor climbing sites including the Mine, Atlantis and the Pond.
William Boyce Thompson bought the old Silver Queen Mine in 1910, and by 1912, the new Magma Copper Company was in production running the operations of the Silver Queen Mine. The Magma Copper Company became one Arizona's greatest copper producer after the silver vein of the Queen Silver Mine dried and ran out. [2] [3] [4] [5]
A 300-ton-per-day concentrator was built in 1914. In 1915, a narrow-gauge railway connected Superior with the Southern Pacific Railroad, which was converted to standard gauge in 1923. A smelter was built in 1924. [12] After 71 years of production, the Magma Mine closed in August 1982 due to high operating costs and declining copper prices.
Superior: The original Magma Hotel was built in 1912 and is located at 100 Main Street. An adobe addition was built in 1916. In 1923, a two story brick addition labelled "MacPherson's Hotel Magma" (pictured) was built at 130 Main Street. 69: Mandell and Meyer Building: Mandell and Meyer Building: November 20, 2002 : 211 N. Florence St.
Exploration in 2001-2003 resulted in the discovery of a large copper ore body some 7,000 feet (2,100 m) beneath the surface of lands just three miles (4.8 km) east of Superior. If the mine is eventually reopened, it is highly likely the Magma Arizona will be revived to transport the one billion short tons (910,000,000 t) of ore to off-site ...
Copper Basin#402 hauling tanks of sulfuric acid from the Winkelman smelter to the Ray mine, to use in their leach operation.. The Copper Basin Railway (reporting mark CBRY) is an Arizona short-line railroad that operates from a connection with the Union Pacific Railroad (UP) at Magma to Winkelman, in 54 miles (87 km) of length.
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Arizona is known as the Copper State because it produces two-thirds of US copper annually. Laramide copper porphyry deposits are common around Tucson and include the Twin Buttes, Sierrita-Esperanza, Rosemont, Silver Bell and Mission-Pima mines, as well as the historical Ajo mine to the west.