Robert-Bourassa Reservoir

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Robert-Bourassa Reservoir
Robert-Bourassa Reservoir.jpg
Robert-Bourassa Reservoir is located in Quebec
Robert-Bourassa Reservoir
Robert-Bourassa Reservoir
Location in Quebec
Location Baie-James, Jamésie Territory, Quebec
Coordinates 53°45′N 77°00′W / 53.750°N 77.000°W / 53.750; -77.000Coordinates: 53°45′N 77°00′W / 53.750°N 77.000°W / 53.750; -77.000
Lake type Artificial
Primary inflows La Grande River
Primary outflows La Grande River
Catchment area 97,643 km2 (37,700 sq mi)
Basin countries Canada
Surface area 2,835 km2 (1,095 sq mi)
Average depth 21.8 m (72 ft)
Max. depth 137 m (449 ft)
Water volume 61.7 km3 (14.8 cu mi)
Residence time 0.5 years
Shore length1 4,550 km (2,830 mi)
Surface elevation 175 m (574 ft)
1 Shore length is not a well-defined measure.

The Robert-Bourassa Reservoir (in French: Réservoir Robert-Bourassa) is a man-made lake in northern Quebec, Canada. It was created in the mid-1970s as part of the James Bay Project and provides the needed water for the Robert-Bourassa and La Grande-2-A generating stations. It has a maximum surface area of 2,835 square kilometres (1,095 sq mi), and a surface elevation between 168 metres (551 ft) and 175 metres (574 ft).[1] The reservoir has an estimated volume of 61.7 cubic kilometres (14.8 cu mi), of which 19.4 cubic kilometres (4.7 cu mi) is available for hydro-electric power generation.[2]

The reservoir is formed behind the Robert-Bourassa Dam that was built across a valley of the La Grande River. This dam was constructed from 1974 to 1978, is 550 m (1,800 ft) wide at its base, and has 23 million m3 (30 million yd3) of fill.[3] There are another 31 smaller dikes keeping the water inside the reservoir.

Robert-Bourassa reservoir near the Robert-Bourassa generating station.

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