Big Mining Companies Disclose Questionable Stability of Dams - USA DAILY NEWS

Big Mining Companies Disclose Questionable Stability of Dams

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Some of the world’s largest mining companies said more than a dozen dams under their authority have at times failed stability assessments by outside experts, some of them in locations where a dam break would pose a risk to lives.

The disclosures, in detailed inventories released Friday, follow the deadly collapse of a mine-waste dam in Brazil, owned by Brazilian company Vale SA, earlier this year, which killed 270 people. Since then, regulators and investors have demanded more transparency about the safety of dams designed…

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