Rio Tinto invests $55M to add underground mining at Kennecott

Rio Tinto has announced a major growth plan for its Kennecott copper complex outside of Salt Lake City, Utah – an expansion to mining that will also take its efforts underground, which it said holds “potential for significant and attractive underground development.” The miner has earmarked US$55 million for the landmark transition project on the century-old mine and said it…

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