Robert-Bourassa Reservoir, large reservoir in Quebec, Canada

Robert-Bourassa Reservoir is a man-made lake in northern Quebec formed behind the Robert-Bourassa Dam, built across a valley of the La Grande River from 1974 to 1978. The dam is 550 m wide at its base and holds 23 million m³ of fill; 31 smaller dikes keep the water in. Its surface reaches 2,835 km² at an elevation of 168 to 175 m.

The reservoir was created in the mid-1970s as part of the James Bay Project, when the Robert-Bourassa Dam was built across a valley of the La Grande River between 1974 and 1978. In 1996 it was renamed in honour of Robert Bourassa, the former premier of Quebec who had died that year.

The reservoir is accessible via Route Transtaïga at kilometer 62 and offers fishing and boating, with boat ramps for launching. Near Radisson, you will find accommodations ranging from camping sites to inns, along with restaurants, equipment rentals, and outfitter services.

The reservoir is held by one main dam plus 31 smaller dikes, not a single structure. The Robert-Bourassa Dam was built from 1974 to 1978 across a valley of the La Grande River, is 550 m wide at its base and contains 23 million m³ of fill. The reservoir was renamed in 1996 for Robert Bourassa, the Quebec premier who died that year.