Brazilian miner and iron ore producer Vale said it got stability certificates for three iron ore dams at its Agua Limpa mine.
Independent auditors considered the following dams safe: Diogo, Porteirinha and Monjolo.
The Agua Limpa mine is no longer producing iron ore, according to a Vale SEC filing.
Separately, Vale proposed building a 114.8-feet-tall (35-meter) wall to contain iron ore waste at its Sul Superior dam at its Gongo Soco mine, according to media reports.
The Sul Superior dam was one of the 17 dams Brazilian officials denied to grant a stability certificate.