The Bratsk Hydroelectric Power Station (also referred to as 50 years of Great October) is a concrete gravity dam on the Angara River and adjacent hydroelectric power station. It is the second level of the Angara River hydroelectric station cascade in Irkutsk Oblast Russia. From its full commissioning in 1967 the station was the world’s single biggest power producer until Canada’s Churchill Falls was opened in 1971. Annually the station produces 22.6 TWh.
