Rio Tinto has approved a US$108 million investment in underground development to enable early orebody access and undertake orebody characterisation studies for underground mining at the Kennecott copper operations in the US.
Rio is investigating the option of adding underground mining at its Kennecott, US open-pit copper mine
The investment builds on $25 million approved in early-2020 to complete a pre-feasibility study to determine the viability of underground mining operations at Kennecott. Potential underground mining...
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