A once-powerful Montana mining town warily awaits final cleanup of its toxic past

A once-powerful Montana mining town warily awaits final cleanup of its toxic past

News Type: State Source: Washington Post
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High above this storied copper town, one of the tallest earth-filled dams in the country holds back more than 6.5 trillion gallons of toxic sludge from an open-pit mine.

The dam is set to grow even taller. Yet it is the least of Butte’s immediate concerns.