The new government intends to look into establishing a mining tax and analyzing the possibility of taxing capital gains from the sale of mining rights.
Vale said the Sul Superior dam, located just 1.5 km from the mine, remains intact and that it continues to be monitored 24/7 via radar, drones and a robotic station capable of detecting the slightest movements.
Vale said risk of a new dam break as a consequence of an unstable embankment at Gongo Soco open pit, in the southeastern state of Minas Gerais, are now minimal.
The tax was first mooted in 2010 but has been postponed at least three times after mining companies, steelmakers and state-owned power utility Eskom said it would erode profit and push up electricity prices.
State-controlled China Communications Construction Co and iron ore miner Vale SA have agreed to set up a steel mill in Brazil's northern state of Pará with a $450 million investment.