Steel beams headed underground in SD for ‘largest science experiment ever attempted on U.S. soil’

By: Meghan O'Brien

Outlets: South Dakota Searchlight

Published: May 7, 2026

Words: 493

Last Updated: 2 months, 3 weeks ago

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Dignitaries and scientists celebrated the next step Thursday toward what one official called the “largest science experiment ever attempted on U.S. soil.”

Over the coming months, 6,000 steel beams will be moved nearly a mile underground to build infrastructure for the Deep Underground Neutrino Experiment within a former gold mine at Lead, in the Black Hills of western South Dakota. The steel beams come from the European Organization for Nuclear Research, known as CERN.

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