Location
Tocantins River, sub-basin of the Tocantins, Amazon Basin.
Distance from the mouth: 855 Km.
Municipality on the right bank: Estreito (MA).
Municipalities on the left bank: Aguiarnópolis (TO) and Palmeiras do Tocantins (TO).
Start of construction work: February 15, 2007.
Current stage of the work: end of Phase 2 (building the powerhouse, dam, spillway and other civil works).

Reservoir
Length: 260.23 km.
Capacity: 5,400.60 x 106 m³.
Flooded area: 555 km².
Working life: more than 100 years.
Municipalities with areas affected by the reservoir and power station: Estreito and Carolina (MA),Aguiarnópolis, Babaçulândia, Barra do Ouro, Darcinópolis, Filadélfia, Goiatins, Itapiratins, Palmeirante, Palmeiras do Tocantins, Tupirantins (TO).

Dam
Type of structure / material: Gravity-type / homogenous earth
Total crest length: 532.28 m.
Max. height: 46.5 m.
Total crest length (without spillway and powerhouse):485.62m.
Crest elevation:160.00 m.

Overflow system
Type: surface spillway.
Outflow: 62.719 m³/sec.
Total length of the sill: 338,65 m.
Number of spans: 14.
Sluice gates: segment-type.
Width of the sluice gates: 19.20 m.
Height of the sluice gates: 22.50 m.

Intake system
Water intake: gravity type.
Sluice gates: cofferdam type.
Width of the sluice gates: 7.85 m.
Height of the sluice gates: 18.82 m.

Energy
Power capacity of the station: 1087 MW.
Firm energy: 584.9 MW average.
Reference head (turbine): 18.94 m.

Municipalities coming under the area of influence of the power plant:

In the State of Maranhão: Carolina and Estreito.

In the State of Tocantins: Aguiarnópolis, Babaçulândia, Barra do Ouro, Darcinópolis, Filadélfia, Goiatins, Itapirantins, Palmeirante, Palmeiras do Tocantins and Tupiratins.