Robert-Bourassa Reservoir

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Robert-Bourassa Reservoir

Location	Jamésie Territory, Quebec
Coordinates	53°40′N 77°00′WCoordinates: 53°40′N 77°00′W
Lake type	Artificial
Primary inflows	La Grande River
Primary outflows	La Grande River
Basin countries	Canada
Surface area	2,835 km² (1,095 sq mi)
Water volume	61.7 km³ (14.8 mile³)
Surface elevation	175 m (570 ft)

The Robert-Bourassa Reservoir (in French: Réservoir Robert-Bourassa) is a man-made lake in northern Quebec, Canada. It was created 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 surface area of 2,835 km² (1,095 mile²), has an estimated volume of 61.7 km³ (14.8 mile³), and a surface elevation between 168 m (551 ft) and 175 m (574 ft)^[1].

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^[2]. There are another 31 smaller dikes keeping the water inside the reservoir.