On Wednesday, a federal judge in Para State, where the third largest dam in the world would be built, halted the government’s April 20 auction to award contracts for its construction, saying the project could cause “irreparable harm” to indigenous peoples. But by Friday,...A judge in the capital, Brasília, overturned the ruling and said the auction would take place as scheduled...The project has also drawn a storm of criticism from advocates and celebrities, including James Cameron...Environmentalists fear the government would need to construct other dams upstream to guarantee enough water — dams that would flood more forest and affect yet more indigenous peoples. Eletronorte, the government utility directing the Belo Monte project [a project of Consórcio Norte Energia], has denied that more dams would be necessary...