SAO PAULO (Reuters) – Brazilian miner Vale’s tailings dam in the town of Barao de Cocais in Minas Gerais has up to a 15% chance of breaking, the state’s environment secretary said on Monday.
The dam at Vale’s Gongo Soco mine is about 40 miles (64 km)from Brumadinho, where a tailings dam collapse unleashed a torrent of toxic mud in late January, killing more than 240 people.
Environment Secretary Germano Vieira disclosed the estimate after discussing the matter with prosecutors and the company itself.
Vale said last week that the dam was at risk of rupturing. The warnings about another possible dam collapse have underlined concern about the stability of Vale’s tailings dams in general after the world’s largest iron ore miner suffered two deadly accidents in a little over three years.
A dam burst could be triggered by slippage in the embankment at the Gongo Soco mine, Vieira said.