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Tua () is a 
Tua () is a river
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...
in northeastern Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...
, flowing by the border of Vila Real District
The District of Vila Real ( pt, Distrito de Vila Real ) is a district of northern Portugal. With an area of , the district is located east of the port city of Porto and north of the Douro River. Vila Real has always belonged to the historical ...
and Bragança District
Bragança District ( pt, Distrito de Bragança ; mwl, Çtrito de Bergáncia) is a traditional political division of Portugal, in the northeast corner bordering on Spain (Castile and Leon and Galicia), covering 7.4% of the nation's continental l ...
. It is a tributary of the Douro River
The Douro (, , ; es, Duero ; la, Durius) is the highest-flow river of the Iberian Peninsula. It rises near Duruelo de la Sierra in Soria Province, central Spain, meanders south briefly then flows generally west through the north-west part of ...
. The biggest and most important city it flows through is Mirandela
Mirandela () is a city and a municipality in northeastern Portugal. The city itself has a population of about 15,000. The population of the municipality in 2011 was 23,850, in an area of 658.96 km². Mirandela is famous for its cuisine, part ...
.
The Tua line
The Tua line was a metre gauge railway line in northern Portugal, which connected Tua to Bragança. The line was opened in 1887 and closed in 2018. The section from Mirandela to Brunheda is planned to be reopened in 2019.
History
This hig ...
was a narrow gauge railway which closely followed the banks of the river and was closed in 2008.
In 2017 the Foz Tua project, which includes a dam built near the mouth of the Tua River (at the confluence with the Douro River), started producing energy, after a long controversial process between Portuguese government and environmental organizations.
References
Rivers of Portugal Tributaries of the Douro River {{Portugal-river-stub