| Robert-Bourassa Reservoir | |
| Pushpin Map: | Quebec |
| Pushpin Map Caption: | Location in Quebec |
| Location: | Baie-James, Jamésie Territory, Quebec |
| Coords: | 53.75°N -77°W |
| Lake Type: | Artificial |
| Inflow: | La Grande River |
| Outflow: | La Grande River |
| Catchment: | 97643km2 |
| Basin Countries: | Canada |
| Area: | 2835km2 |
| Depth: | 21.8m (71.5feet) |
| Max-Depth: | 137m (449feet) |
| Volume: | 61.7km3 |
| Residence Time: | 0.5 |
| Shore: | 4550km (2,830miles) |
| Elevation: | 175m (574feet) |
The Robert-Bourassa Reservoir 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, and a surface elevation between and .[1] The reservoir has an estimated volume of, of which 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.