Opponents are appealing an air quality permit for the Copper World open-pits mine project , arguing Arizona should have ...

Cleanup continues for Three Kids Mine area where 3,000 homes could be built. The manganese mine, operational from 1917 to 1961, left behind toxic metals and asbestos throughout the site. PREVIOUS: ...

Environmental and community groups have appealed the Arizona Department of Environmental Quality’s decision to grant an air ...

Water stewardship principles are integral to the mining sector's compliance with the Global Industry Standard on Tailings ...