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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).
The Granite Mountain/Speculator Mine disaster of June 8, 1917, occurred as a result of a fire in a copper mine, and was the most deadly event in underground hard rock mining in United States history. Most men died of suffocation underground as the fire consumed their oxygen; a total of 168 miners were killed.
ARCO closed the Berkeley Pit and shut off the deep pumps in 1982, allowing the pit and mines to fill with water. The Continental Pit, the last active Anaconda mining property in Butte, was closed in 1982, but resumed mining in the early 2000's. Six years after ARCO acquired rights to the "Richest Hill on Earth", Butte's mines were completely idle.
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Montana Resources LLP is an American mining company with headquarters in Butte, Montana. The company is owned by businessman Dennis Washington as a unit of The Washington Companies . The company employs about 350 people, and operates the Continental mine, an open pit copper and molybdenum mine at Butte.
Anaconda headframes overlooking the city of Butte. HAER photo Chalcocite replacing covellite, said to be found in 1883, in the early days of mining at Butte. Size 8.0 x 6.3 x 3.6 cm. The Anaconda Copper Mine was a large copper mine in Butte, Montana that closed operations in 1947 and was eventually consumed by the Berkeley Pit, a vast open-pit ...
Authorities fear a woman in western Pennsylvania who disappeared while looking for her cat may have been swallowed by a sinkhole — a phenomenon likely caused by mine subsidence. Search and ...
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