Some environmental activists worry that the extension is closer to homes in Magna and raised concerns about their air and water quality. But for metro township officials, the picture is more complex.
Rio Tinto plans an expansion to keep the copper flowing for more years and to increase the site’s stability.
Some environmental activists worry that this eastern extension is closer to homes in Magna and raised concerns about their air and water quality. But for metro township officials, the picture is more complex and keeping the mine running also ranks high in their priorities.. “They have to have a place to put their tailings if they’re going to continue to run.”
Kennecott has an operational north tailings impoundment, near Interstate 80. From State Road 201, drivers can see the south impoundment, which hasn’t received active tailings since 2001. It is dry and being reclaimed.that the southeastern corner of its tailings pond could fail in a major earthquake, sending a “soupy sludge” into Magna.
Dust generated from tailings in many mining operations is elevated in heavy metals, she said, so those may also be enriched from metals like copper, lead and zinc. “We’re highly regulated,” she said. “It meets all our permit requirements. And we meet those pretty easily. The only challenge that we have is when we get high winds. It will stir that up and so we’ll have suspended solids.”
De Freitas also worries that the dust suppression methods may be ineffective, especially when the ponds are located next to a growing metropolitan area that is already grappling with air pollution.
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