The Robert-Bourassa Reservoir is located in northern Quebec, in Canada. It was created in the mid-1970s by impounding the La Grande River to store water needed for hydroelectric power generation at Robert-Bourassa and La Grande-2-A generating stations. The reservoir has a capacity of 61.7 billion cubic meters and covers a surface area of 2,815 square km. It has a discharge capacity of 16,280 cubic meters of water per second, slightly more water than St. Lawrence River beside Québec’s capital city. This phenomenal capacity corresponds to an exceptional flood likely to occur once every 10,000 years.