Two of the world's largest mining firms, Rio Tinto and BHP have been trying to develop Resolution Copper for roughly two ...

Arizona tribal leaders reacted angrily after President Donald Trump said their opposition to a copper mine was un-American.

The mining giant has taken its lobbying efforts to Washington DC after a US appeals court temporarily blocks the Trump administration from handing a sacred tribal site over to Resolution Copper.

A federal land swap will have to wait as another legal challenge to a controversial Arizona copper mine makes its way through ...

Hours before a disputed land swap was to take effect, an appeals court halted the process, giving copper mine opponents more ...

Based on current water prices, Arizona would be giving $404 million worth of groundwater to the two largest mining companies in the world, which plan to construct the Resolution Copper Mine 70 ...

A colossal copper mine that could pump billions into the Arizona economy is charging ahead, after nearly a decade of Washington roadblocks. In a rush of votes Friday, the Senate passed the measure ...

The Copper World mining project south of Tucson reaped a big financial boost Wednesday: Japan-based Mitsubishi Corp. will ...