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Historic

Berkeley Pit 1978. Photo courtesy of Butte-Silver Bow Public Archives.
The Berkeley Pit in Butte, Montana in 1979-80, photo from the Library of Congress.
Berkeley Pit water quality has shown changes over time. It is regularly monitored by the Montana Bureau of Mines & Geology. The reddish color typically observed is due to high concentrations of iron solids. Photo by Justin Ringsak, 2009.
Berkeley Pit 1982. Photo courtesy MBMG.
Berkeley Pit 1960s. Photo courtesy of the Butte-Silver Bow Public Archives.
Berkeley Pit 1978. Photo courtesy of Butte-Silver Bow Public Archives.
Snow on the Benches of the Berkeley Pit. Photo courtesy of the Butte-Silver Bow Public Archives.
The Berkeley Pit in Butte, Montana in 1973. Photo from The Seattle Daily.