Três Irmãos Dam
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The Três Irmãos Dam is an
embankment dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and ...
with gravity sections on the Tietê River in
Pereira Barreto Pereira Barreto is a municipality in the state of São Paulo in Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over ...
of São Paulo state in Brazil. The dam is about upstream of the river's confluence with the
Paraná River The Paraná River ( es, Río Paraná, links=no , pt, Rio Paraná, gn, Ysyry Parana) is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some ."Parana River". Encyclopædia Britannica. Encyclopædia Br ...
. It supports the largest
hydroelectric Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and ...
power station on the river with an installed capacity of . The dam was completed in 1991 and the five
Francis turbine The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The proces ...
-generators were commissioned between November 1993 and January 1999. It is owned and operated by Companhia Energética de São Paulo (CESP). The dam also provides for navigation with two ship locks.


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{{DEFAULTSORT:Tres Irmaos Dam Dams completed in 1991 Dams in São Paulo (state) Embankment dams Hydroelectric power stations in Brazil Locks of Brazil 1991 establishments in Brazil