Vale SA, whose iron-ore venture with BHP Billiton Ltd. suffered a dam collapse in November that killed 19 people, said one of the lawsuits against the spill was dismissed.
Humane society Sohumana had sought 20 billion reais ($5.7 billion) compensation in a civil suit filed with the 5th Federal Court of Rio de Janeiro. Vale said in a statement Monday that the case was rejected.
The Samarco iron-ore mine is looking to resume partial operations by the end of the year to help generate funding for a settlement reached with the Brazilian government in March, in which it agreed to pay out about 12 billion reais over 15 years.
The settlement was ratified by a federal judge in May after prosecutors lodged a claim for more than $40 billion, alleging the tailings dam burst was partly attributable to an increase in production levels.