PALM BEACH, Fla., Nov 13 (Reuters) - Rio Tinto's Kennecott copper smelter may toll third-party concentrate on a large scale for the first time next year, as the second-biggest U.S. copper producer ...

Months after picketers targeted Kennecott Copper's on-site coal power plant the company has made a proposal to convert partially to much-cleaner burning natural gas, a specific... Months after ...

U.S. President Donald Trump on Friday reversed a Biden-era air pollution rule that had imposed ​stricter limits on emissions ...

Rio Tinto said on Friday its Kennecott operation in Utah, U.S., has signed a 15-year virtual power purchase agreement with ...

SALT LAKE CITY (AP) — Nearly half of the 270 mine workers offered early retirement packages from Kennecott Utah Copper Corp. have accepted the deal. The company is looking to slash its ranks following ...

(AP) The landslide that washed over the terraced steps of a mining pit nearly a mile deep left only the tip of one giant electric-powered shovel poking out of the dirt. The rubble buried three of them ...