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The Berkeley Pit is a former open pit copper mine in the western United States, located in Butte, Montana. It is one mile (1.6 km) long by one-half mile (800 m) wide, with an approximate maximum depth of 1,780 feet (540 m).
Berkeley Pit: Butte, Silver Bow County, Montana: Anaconda Copper: Porphyry copper: Closed in 1982; now a superfund site and tourist attraction Troy Mine: Troy, Lincoln County, Montana: Revett Minerals, Hecla Mining: Closed 2015; active between 1981 and 1983, and 2005–2015 Yerington - Anaconda: Lyon County, Nevada: Anaconda Copper: Closed ...
The Big Hole – a former diamond mine in Kimberley, dug to 240 m (790 ft) between 1871 and 1914, making it the deepest hand-excavated pit in the world. Now a museum. The Jagersfontein Mine – operating between 1888 and 1971. This was hand-excavated to 201 m (660 ft) by 1911, and the hand-dug pit was sightly larger than the Big Hole.
Thousands of homes were destroyed in the Meaderville suburb and surrounding areas, McQueen and East Butte, to excavate the Berkeley Pit, which Anaconda Copper opened in 1954. [56] [48] When it opened, the Berkeley Pit was the largest truck-operated open pit copper mine in the nation. [60] It grew until it began encroaching on the Columbia ...
Thousands of homes were destroyed in the Meaderville suburb and surrounding areas, McQueen and East Butte, to excavate the Berkeley Pit, which opened in 1954 [41] by Anaconda Copper. At the time, it was the largest truck-operated open pit copper mine in the United States. The Berkeley Pit grew with time until it bordered the Columbia Gardens.
After firing up Google’s map software to plan a camping trip in Quebec’s Côte-Nord region, he told CBC, he found the curve of what turned out to be a roughly nine-mile-diameter pit near a ...
The Berkeley Pit, Butte, in May 1984. In 2006, Montana was the fourth-largest copper-producing state in the country. Butte, Montana was once the nation's most prolific copper-mining district. Miners first came to Butte in 1864 to mine placer gold. Hard rock silver mining began in 1874, then rich copper veins were discovered in 1882.
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