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The Río Negro (, ''Black River'') is a river in southern Brazil and central Uruguay. It originates in the southern highlands of Brazil, just east of 
The river is dammed near Page about the Constitution Dam at Palmar
which generate hydroelectric power for Uruguay with 108 MW and 333 MW, respectively. The Río Negro's
The Río Negro (, ''Black River'') is a river in southern Brazil and central Uruguay. It originates in the southern highlands of Brazil, just east of Bagé
Bagé () is a city located in the state of Rio Grande do Sul, Brazil. In 2020, its population was 121,335 in a total area of 4,096 km2. It was the seventeenth largest city in the state according to the 2011 census. The city was founded in 1 ...
, and flows west across the entire width of Uruguay to the Uruguay River
The Uruguay River ( es, Río Uruguay, ; pt, Rio Uruguai, ) is a major river in South America. It flows from north to south and forms parts of the boundaries of Brazil, Argentina, and Uruguay, separating some of the Argentine provinces of La M ...
. The course of the Río Negro across Uruguay effectively divides the south of the country from the north. The Río Negro's principal tributaries are Yí River and Tacuarembó River.
The river is dammed near Paso de los Toros
Paso de los Toros (''Bulls' Pass'') is a city of the Tacuarembó Department in Uruguay.
History
The Midland Uruguay Railway began operation in 1889 with a line that ran between Paso de los Toros and Salto. On 17 July 1903, the group of houses ...
, creating the Rincón del Bonete Reservoir, also called the Gabriel Terra Reservoir or the Rio Negro Reservoir. With a surface area of about , it is the largest reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.
Reservoirs can be created in a number of ways, including contr ...
in Uruguay and an installed capacity of 160 MW.
Downstream from the Rincón del Bonete Reservoir, there are two more dams, the Baygorria Dam and the Constitución Dam
Constitución is Spanish for "constitution" and may refer to:
Geography
Argentina
*Constitución, Buenos Aires, a neighborhood in central Buenos Aires, where the Estación Constitución railway station is located
*Constitución Department, Santa F ...
at Palmar,which generate hydroelectric power for Uruguay with 108 MW and 333 MW, respectively. The Río Negro's
drainage basin
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...
size is about .
There is a delta at its confluence with the Uruguay River with two main mouths. Yaguarí creek -bordered by Vizcaino and Lobos Islands- is the navigable entry to Negro River, and may change water flow direction when the Uruguay is high while the southern mouth (Spanish: Boca Falsa) is very wide but shallow.
See also
* Lago Rincón del Bonete * 1959 flood in UruguayReferences
External links
* Rivers of Uruguay Rivers of Brazil Tributaries of the Uruguay River Rivers of Rio Grande do Sul Rivers of Cerro Largo Department Rivers of Rivera Department Rivers of Tacuarembó Department Rivers of Durazno Department Rivers of Río Negro Department Rivers of Flores Department Rivers of Soriano Department {{Uruguay-river-stub