RIO DE JANEIRO, BRAZIL - (Reuters) Brazilian miner Vale SA has raised the emergency level at the Sul Inferior dam at its Gongo Soco mine in Barão de Cocais, in the southeastern state of Minas Gerais, after heavy rainfall eroded the structure’s reservoir.

“As a result of unusually heavy rain, Vale reinforced the number of field teams on standby for any eventual emergencies,” Vale said in a securities filing late on Saturday, adding that the dam was raised to ‘Level 2’ watch from ‘Level 1’.

The dam is safe and secure, Vale said, but had been on Level 1 . . .

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