The proposed $7bn HidroAysen hydro-power dam project in Chile has received an environmental clearance from the federal government commission.
The project, owned by electric utility Endesa Chile and Colbun, involves the construction of five dams; two on the River Baker and three on the Pascua River.
The first of the power stations will commence operations in late 2019 and the entire complex is expected to be completed by 2025.
The dams are set to generate combined energy of 2.75GW, nearly a third of central Chile's current capacity, within 12 years.
HidroAysen executive vice-president Daniel Fernandez said the Aysen region will receive cheaper energy and about $350m in infrastructure, including seaports and airports.