Resolution Copper’s proposed mine would discharge copper and other pollutants into ... director of Sierra Club’s Grand Canyon Arizona Chapter. “We need EPA to act now to protect this important stream ...

If left unchecked, Resolution Copper’s proposed mine at Oak Flat will worsen the degradation of ... director Sierra Club’s Grand Canyon (Arizona) Chapter. “The Arizona Department of Environmental ...

Hudbay Minerals Inc. still needs to complete a final feasibility study and find a financial partner before work begins on the $1.3 billion project in the Santa Rita Mountains.

A uranium mine has dumped nine million gallons of toxic water out of the shaft near Arizona's Grand Canyon since opening last year, a new study has revealed. Pinyon Plain Mine, located 10 miles ...