South Dakota's DUNE Project — Kiewit-Alberici Preps Former Goldmine for Science Experiment

International science came to the Black Hills of western South Dakota, because that's where the deep hole is. Over the last century, the hole – Ross Shaft – was sunk 5,000 ft. to give access to lateral tunnels from which gold was extracted from sedimentary rock to a depth of 8,000 ft....

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