Upstream is the poisonous Berkeley pit, an open-pit mine in Butte, which was once called the Richest Hill on Earth for the quantities of gold, silver and copper mined there.

上游是有毒的伯克利矿坑，一个比尤特的露天矿。它曾经被称为地球上最富有的矿山，因为这里的金、银和铜矿数量巨大。

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In this paper environment risk assessment of the mine tailings reservoir engineering making use of open pit abandoned at Paishanlou Gold mine was carried out.

研究了排山楼金矿利用废弃的露天采场作为尾矿库工程的环境风险评价问题。

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Based in Pheonix, Phelps Dodge has copper mining operations in the U.S., Chile, Peru and Congo, while New Orleans-based Freeport operates the vast open-pit Grasberg gold, copper, and silver mine in Indonesia, and has reserves of about 37 billion pounds of copper and 40 million ounces of gold.

FORBES: Freeport To Buy Phelps Dodge For $26B

Serra Pelada, at its peak in the 1980s, saw as many as 80, 000 artisanal miners (called garimpeiros) mine roughly 2 million ounces of gold as well as platinum and palladium from a hand-dug open pit.

FORBES: Serra Pelada Set To Resume Gold, Platinum, Palladium Production Again In 2013