Atlantic Richfield

A federal judge has ruled that a former owner of an aluminum smelter outside of Columbia Falls is partially responsible for the financial costs of cleaning up the hazardous waste at the site.

State and federal officials say a large mining clean-up project in Montana is nearly complete and open for recreation. At the Upper Blackfoot Mining...

A final deal signed by a federal judge this week outlining cleanup of century old mining waste in Butte means there’s going to be a flurry of work...

Butte’s $150 million cleanup deal is at last carved in legal stone after more than a decade of negotiations, and more than three decades on the...

Butte’s pending $150 million Superfund cleanup deal is now one step away from being legally set in stone. The U.S. Department of Justice on Thursday...

Butte’s local government approved an overarching $150 million Superfund cleanup deal on Wednesday. This marks a new chapter for the Mining City, which...

The Environmental Protection Agency last week announced a final Superfund deal for Butte, detailing a roadmap they say will permanently clean up one of...

The Environmental Protection Agency Thursday unveiled a final cleanup deal for Butte , marking a crucial turning point in the decades-long Superfund...

This week, the parties in charge of the Superfund cleanup of the Butte Hill and urban creek corridors agreed on a final cleanup deal, marking a turning...

This week, for the first time ever, once toxic water from the Berkeley Pit , the abandoned open pit copper mine in Butte, is being treated and released...