The Beauharnois Power System
Lake St. François acts as the main power pool for the Beauharnois power system, which includes a smaller power station, Les Cèdres, having a capacity of about 160,000 kW as well as the navigation channel of the St. Lawrence Seaway. The main power plant is however the Beauharnois power station with a capacity of 1,600,000 kW. The water flow of the system is controlled by a set of dams at the end of Lake St. François (Du Coteau Rapids Weirs), along the St. Lawrence and near Lake St. Louis. Source: Hydro Québec.