Mining giant Rio Tinto is investing an additional $55 million in development capital to start underground mining to expand production at its giant Kennecott copper operations in the western United States, Kallanish reports.
The new underground operations in Utah will initially focus on an area known as the Lower Commercial Skarn (LCS) that will deliver about 30,000 tonnes of additional high-quality copper through the period to 2027, in addition to continuing open-…
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