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Rio Tinto spending $108m to study going underground at Kennecott – MINING.COM – MINING.com
Potential underground mining would occur concurrently with open-pit operations.

Potential underground mining would occur concurrently with open-pit operations, according to the company.
Bingham Canyon has been mined since 1906
“Kennecott holds the potential for a significant and attractive underground development, with declared Mineral…
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