Getting your Trinity Audio player ready... LEADVILLE — Millions of tons of waste from decades-old mining operations sit in the hills east of town. The brown and orange piles of abandoned ore rise 30 ...

BOISE, Idaho (AP) -- A company wants to use cyanide as part of gold mining in the Boise River watershed, the second application in 2004 for a mining permit to extract gold from land above the capital.

While cyanide in mining is nothing new, using heap leaching to process gold didn't come along until the 1970s, McCullough said, when the first such mine was opened in Nevada. The process opened up the ...

It said it had fielded "multiple inquiries" regarding whether cyanide in gold mining was banned within the European Union, which includes French Guiana. Montagne d'Or has a 2.75 million ounce gold ...

That same year Pegasus Gold filed for bankruptcy. On Monday, the Montana Department of Environmental Quality announced it has transferred an operating permit from Majesty Mining to Bear Claw Mining ...

The public has until Feb. 6 to comment on the proposed Grassy Mountain Gold and Silver Mine near Vale in Malheur County Oregonians have roughly two months to weigh in on a Nevada company’s plans to ...

Gold mining has long relied on a single, highly toxic molecule: cyanide. Today, tightening regulations, rising ESG scrutiny, and increasingly complex ore bodies are challenging this long-standing ...

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Do we really have to say this again? Voters have already said "no" clearly - and repeatedly - to new open-pit mining operations that use cyanide to process ore. Montanans don't like the environmental ...