Helping You Understand The Berkeley Pit

Learn About the Berkeley Pit


The more we understand about the Berkeley Pit water, the better able we are to manage the Berkeley Pit.


The Berkeley Pit is the primary focus of the Butte Mine Flooding Operable Unit (BMFOU) within the Silver Bow Creek/Butte Area National Priority List Superfund site.


Understanding Butte’s natural geology helps explain why the Berkeley Pit was formed and why the water is contaminated.

 Waterfowl Protection

A rigorous waterfowl protection program is in place to deter birds from landing on the Berkeley Pit.

 Research & Science

The Berkeley Pit has been the subject of over 30 years of research and observation and continues today.


The Superfund process involves a lot of jargon. Our glossary breaks down terms that may be unfamiliar to you.

Educational Tours

Tours for school groups, government agencies, community organizations, and similar groups are available by appointment. Email info@pitwatch.org to arrange a tour.

Still Have Questions?

Contact Us Today

Catered steak dinner
Matt Vincent looks through one of several high powered scopes located within the Bird Mitigation Station at Montana Resources.
Cream topped bunt cake
Cast iron roasted chicken
Taming the Berkeley Pit

Taming the Berkeley Pit

 The Taming of the Berkeley Pit by Dick Maney documents the construction of the Polishing Plant that was designed to filter mine water to a point that it could be safely discharged into Silver Bow Creek. The process, the construction, and the reasons for the Polishing...

ABC FOX Montana – Berkeley Pit Waterfowl Protection Program

ABC FOX Montana – Berkeley Pit Waterfowl Protection Program

Every year thousands of birds fly over Butte on their migrations. Engineers work diligently as part of the Berkeley Pit Waterfowl Protection Program to ensure these birds don't come to rest on the Pit. ABC FOX Montana reported on how the program achieves a success...

Superfund during the COVID-19 pandemic

Superfund during the COVID-19 pandemic

By Matt Vincent Right now, everything is seemingly within the iron grip of the novel coronavirus/COVID-19 pandemic. Our daily lives have been redefined by the government’s response. As of Tuesday, April 15, Montana has 404 confirmed cases, 50 cumulative...