1955: The Open Pit Mine Era

The Berkeley Pit In 1955, mining in Butte saw the light, literally. Excavation on what would become the Berkeley Pit, named from one of several nearby historic underground mines that the Pit would later swallow, began that year in a transition from underground to open pit mining. The Pit would, in the next decade, swallow [...]


The Clark Fork River connects the largest complex of federal Superfund environmental clean-up sites in the U.S. The Basin is divided into sub-areas where various environmental reclamation and restoration projects are underway. Some of these sites are shown in the photos below. For answers to common Superfund questions, click here to download the CFWEP Superfund [...]

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