The Berkeley Pit looking west from Rampart Mountain near Butte, Montana. The Pit water and connected underground mines and wells are monitored monthly by the Montana Bureau of Mines & Geology. Photo by Matt Vincent.

The Berkeley Pit looking west from Rampart Mountain near Butte, Montana. The Pit water and connected underground mines and wells are monitored monthly by the Montana Bureau of Mines & Geology. Photo by Matt Vincent.

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