And announcing our winners for 2009 Since 1997, the Berkeley Pit Education Committee has given awards to area students competing in annual Montana Tech Science and Engineering Fairs who use their projects to explore important topics related to the Berkeley Pit and mine waste cleanup technologies. At the 2009 fair, three East Middle School students received awards for Pit-related projects: […]

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What is pH?

pH is a measure of the acidity or alkalinity of a solution. Pure or neutral water has a pH of 7.0. Acids are defined as those solutions that have a pH less than 7; while bases are defined as those solutions that have a pH greater than 7. The pH scale is logarithmic. Unlike linear scales, which have a constant […]

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Looking west from Rampart Mountain over the Yankee Doodle Tailings Pond, located north of the Berkeley Pit, in 2007. North of the Berkeley Pit stands one of the largest earthen dams in the United States. The dam, constructed from waste rock mined out of the Berkeley Pit and, in more recent years, the Continental Pit, stands over 650 feet (200 […]

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West Camp also part of mine flooding site

The anatomy of the thousands of miles of tunnels beneath the Butte Hill is daunting to consider and little understood by many. Important details, such as the distinction between the “West Camp” and “East Camp”, can cause consternation for many a curious observer. The Berkeley Pit and surrounding underground mine workings and bedrock wells are referred to as the “East […]

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The Berkeley Pit is literally world famous in the mine waste cleanup industry, and the final technology used in the Horseshoe Bend Water Treatment Plant, a High Density Solids (HDS) process, was selected after an assessment of tests and the demonstrated effectiveness of cleanup technologies from research groups around the world. The Horseshoe Bend facility currently treats water from Horseshoe […]

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