The Berkeley Pit has since become one of the largest Superfund sites.

Ultimately, about 1,000,000,000 tons of material was mined from the Berkeley Pit.

The Berkeley Pit is on the federal Superfund site list.

In 1982, all mining in the Berkeley Pit was suspended.

It was not until the 1990s that serious efforts to clean up the Berkeley Pit began.

Ironically, the Berkeley Pit is also one of the city's biggest tourist attractions.

Its location has been consumed by the Berkeley Pit, a vast open-pit mine.

The Berkeley Pit kept expanding and ate away at the older parts of Butte.

The short film ends with a discussion of Berkeley Pit.

The acidic water seeping into the Berkeley Pit will be pumped out and treated forever.