Homestake Mine (South Dakota)
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The Homestake Mine is a deep underground gold mine located near Lead, South Dakota. Until it closed in 2001 it was the largest, oldest, and deepest mine in the Western Hemisphere. The Homestake Mine was the site of the pioneering Davis Experiment, the first experiment to observe solar neutrinos.
It is one of two mines being considered by the United States as a location for the Deep Underground Science and Engineering Laboratory (DUSEL). The other mine is the Henderson Mine near Empire, Colorado. Although the Homestake Mine is about one hundred years old and has structural and water problems, it remains under consideration because it is about 3000 feet/914 meters deeper than the Henderson Mine, in use as a molybdenum mine since 1976.
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