Two Alberta environmental groups are praising Premier Danielle Smith’s comments on banning open-pit mining, just days after ...

We just need to do it a little faster." Rio Tinto’s Kennecott mine, just west of Salt Lake City, is the largest open-pit mine in the world, spanning 2.5 miles across and about 4,000 feet deep.

Ongoing extraction inside the Continental Pit operated by Montana Resources — an open pit mine in Butte, Mont. The company is working with researchers at the nearby closed Berkeley Pit ...

The Trump administration has selected a proposed open pit copper-nickel mine in northern Minnesota for a fast-tracked permitting process. On Friday, the Trump administration announced a list of ...

Ukrainian legislators have unanimously voted to ratify a minerals deal with the United States in the hope of securing military assistance to deter future Russian aggression. The country’s ...