Abstract
A decision by the Toronto‐based Barrick Gold Corporation to turn off the flood pumps at its closed gold mine in Lead, South Dakota on 10 June complicates the potential use of the site as a deep underground laboratory for Earth science and physics studies.Barrick shut off the pumps due to concerns about liability and mine safety among other issues, even though the U.S. Congress has appropriated $10 million for the company to continue pumping for several years. The company currently is continuing its negotiations with the state of South Dakota to transfer ownership of the mine to the state. That transfer is an important step in the mine's eventual use as an underground laboratory.
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