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Continente: América

País: Canadá

Localización: Baie-James, Québec

Año: 1981

Estado: Terminado

Descripción:Las presas de multiusos instaladas para la irrigación, la prevención de inundaciones, o la reconstrucción, pueden tener una central hidroeléctrica añadida con el costo de la construcción relativamente bajo, proporcionando una corriente de ingreso útil para compensar el costo de operación de la presa. Como ejemplo importante de hidroeléctrica, está el complejo ‘La Grande’ en Quebec, Canadá, es el sistema hidroeléctrico líder mundial más grande de generación. Las ocho centrales eléctricas del complejo tienen una capacidad generadora total de 16,021 MW.

La estación de Robert Bourassa solo tiene una capacidad de 5,616 MW. Una novena estación (Eastmain-1) está actualmente en construcción y añadirá 480 MW al total. La construcción de un proyecto adicional sobre el río Rupert fue comenzada el 11 de enero de 2007. Esto añadirá dos estaciones con una capacidad combinada de 888 MW.

http://www.arqhys.com/construccion/presas-hidroelectricidad.html

The Robert-Bourassa generating station (formerly known as La Grande-2) is a hydroelectric power station on the La Grande River that is part of Hydro-Québec's James Bay Project in Canada. The station can generate 5,616 MW and its 16 units were gradually commissioned between 1979 and 1981.[1] Annual generation is in the vicinity of 26500 GWh.[2]

Together with the adjacent 2,106 MW La Grande-2-A generating station (LG-2-A), commissioned in 1991-1992, it uses the reservoir and dam system of the Robert-Bourassa Reservoir to generate electricity. The two plants taken together account for more than 20% of Hydro-Québec's total installed capacity of 36,810 MW in 2009.[1] It is Canada's largest hydroelectric power station and currently ranks in 9th place on the list of largest hydroelectric power stations.

Initially known as La Grande-2, it was renamed after Robert Bourassa who, as Premier of Quebec (1970–1976 and 1985–1994) gave the James Bay Project a vital political impetus.

Context

Main article: James Bay Project

The Robert-Bourassa generating station is the main facility of the James Bay hydroelectric project, a large hydroelectric complex built on the La Grande River, a large river in Quebec's scarcely populated northern Quebec. It was also the first to be built, between 1974 and 1981. It was inaugurated by Premier René Lévesque of Quebec, on October 27, 1979.

Conception work on the generating station, dam and reservoir began in October 1970 when Montreal-based engineering firm Rousseau Sauvé Warren (RSW) was given by Hydro-Québec to make the case for the development of the La Grande River. Another engineering firm, Asselin, Benoît, Boucher, Ducharme & Lapointe (ABBDL) was tasked with a feasibility study on the more southerly NBR (Nottaway, Broadback, Rupert) concept. At RSW the development of the La Grande River was championed by François Rousseau, one of firm's associates and a former Hydro-Québec senior engineer.[3]

A final decision to build the hydroelectric complex on the La Grande hydrographic system was made in 1972, after engineers determined the NBR project would be less cost effective because of the silty nature of the soils in the NBR area. The La Grande option had the added advantages of a lesser impact on First Nations hunting and fishing, on the boreal forest and would require less flooding.[4]

Construction

he main dam is located 117.5 kilometers (73.0 mi) from the mouth of the river, in the transition zone between the plateau and the coastal plain, and has a maximum height of 162 meters (531 ft). Twenty-nine dykes of various sizes close the reservoir. They are organized in three group: dykes D1-D4 are located north of the spillway, nicknamed the Staircase of the Giants,[5] D5-D14 are located on the left shore of the river while a third group, nicknamed the Duncan dykes (D17-D27), are located 30 kilometers (19 mi) south. The dam and dykes hold a reservoir covering an area of 2,835 square kilometres (1,095 sq mi) with a useful capacity of 19.365 billion m³.[6]

The generating station itself is located underground, 6 kilometers (3.7 mi) downstream from the main dam. It hosts 16 Francis turbines, set up in two groups of eight each.[6]

In 1974, in what was one of the most extreme cases of workplace sabotage up to that point in time, workers at the La Grande-2 site used bulldozers to topple electric generators, damaged fuel tanks, and set buildings on fire. The project was delayed a year, and the direct cost of the damage estimated at $2 million CAD. The causes were not clear, however three factors have been cited: inter-union rivalry, poor working conditions, and the perceived arrogance of American executives at the contractor, Bechtel Corporation.[7]

http://en.wikipedia.org/wiki/Robert-Bourassa_generating_station

http://www.flickr.com/photos/43198692@N04/tags/jamesbay/

http://www.flickr.com/photos/desertchick-/tags/robertbourassa/

http://www.hydroquebec.com/generation/centrale-hydroelectrique.html

http://www.hydroforthefuture.com/actualites/168/a-major-refurbishment-project-at-the-largest-underground-generating-station-in-the-world

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