Studies to build a hydroelectric plant in the region began in the 1980s as an alternative power supply to the city of Manaus (AM).
Empresa de Pesquisa Energética (EPE) is a state-owned agency under the Ministry of Mines and Energy of Brazil.
* Indigenous people affected:
Katxuyana, Hixkaryana, Katuena, Waiwai (Indigenous Land Nhamundá-Mapuera).
* information from Instituto Socioamiental (ISA)