Barra Grande Hydroelectric Power Plant

The Barra Grande Hydroelectric Power Plant is a dam and hydroelectric power plant on the Pelotas River near Celso Ramos on the border of Santa Catarina and Rio Grande do Sul, Brazil. The power station has a 708 MW capacity and is supplied with water by a concrete face rock-fill embankment dam, the second tallest dam in Brazil.[1] It is owned and operated by Energética Barra Grande SA (BAESA) and produces a 30% equivalent of the demand in Santa Catarina.[2]

Barra Grande Dam
Location of Barra Grande Dam in Brazil
Official nameBarra Grande Hydroelectric Power Plant
LocationCelso Ramos, Santa Catarina/Rio Grande do Sul, Brazil
Coordinates27°46′36″S 51°11′23″W
Construction began2001
Opening date2005
Construction cost$1.5 billion USD
Owner(s)Energética Barra Grande SA (BAESA)
Dam and spillways
Type of damEmbankment, concrete face rock-fill
ImpoundsPelotas River
Height185 m (607 ft)
Length665 m (2,182 ft)
Width (crest)14 m (46 ft)
Width (base)500 m (1,600 ft)
Spillway typeService, controlled
Reservoir
CreatesBarra Grande Reservoir
Surface area94 km2 (36 sq mi)
Power Station
Commission date2005-2006
Turbines3 x 236 MW (316,000 hp) Francis turbines
Installed capacity708 MW (949,000 hp)
Website
BAESA

Background

Construction on the dam began on May 2001 by the consortium BAESA whose stakeholders include Alcoa 42.2%, Companhia Paulista de Força e Luz (CPFL) 25%, Companhia Brasileira de Alumínio (CBA) 15%, Camargo Corrêa Cimentos 9%, and DME Energética 8.8%. On 1 November 2005, the first generator went into operation, the second in February 2006 and the third in May of the same year.[3][4] In September 2005 after construction was complete and the reservoir began to fill, the concrete face on the upstream side of the dam cracked, causing a leak of 1280 liter/s. In June 2007, soil was dumped in the area which reduced the leak to 800 l/s. The dam still remains safe.[5]

Barra Grande Dam

The Barra Grande Dam is a 665 metres (2,182 ft) long and 185 m (607 ft) high concrete face rock-fill embankment dam. At its base, it is 500 metres (1,600 ft) wide and 14 metres (46 ft) at its crest. The dam impounds a reservoir with a surface area of 94 square kilometres (36 sq mi) which supplies water to three 236 MW Francis turbines in the power station.[1]

Controversy

Construction of the dam required clearing 40 square kilometres (15 sq mi) of araucaria, a Brazilian pine tree, of which only 1% to 7% of their original forest survives. Other species threatened by the reservoir were the endangered bromeliad Dyckia distachya and Paraná. The environmental controversy require BAESA to extend and acquire new licenses along with spending extra money on programs.[6][7][8]

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gollark: You can get GPS precision of a few metres or better nowadays. It's very neat.
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See also

References
  1. "Estruturas" (in Portuguese). BAESA. Archived from the original on 6 July 2011. Retrieved 12 September 2010.
  2. "Barra Grande Hydroelectric Power Plant" (in Portuguese). Archived from the original on 6 July 2011. Retrieved 12 September 2010.
  3. "Barra Grande". Alcoa. Archived from the original on 25 October 2010. Retrieved 12 September 2010.
  4. "Hydroelectric Plants in Brazil - Santa Catarina". IndustCards. Archived from the original on 20 August 2010. Retrieved 12 September 2010.
  5. "Taking a tour of CFRDs". International Water Power & Dam Construction. 6 October 2009. Archived from the original on 29 February 2012. Retrieved 12 September 2010.
  6. Hirsch, Tim (5 January 2005). "Push to block Brazil dam project". BBC News. Retrieved 12 September 2010.
  7. "Barra Grande dam gets operating license". EcoAmericas. June 2005. Archived from the original on 10 July 2011. Retrieved 12 September 2010.
  8. Hirsch, Tim (12 January 2005). "Controversial dam clears hurdle". BBC News. Retrieved 12 September 2010.
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