It is the second level of the Angara River hydroelectric station cascade in Irkutsk Oblast, Russia.

Components: On the top of the dam are the track of the Taishet-Lena railway line and a vehicle road.

With a 4,500 MW capacity, and 22.6 TWh of annual output, it is Russia's second largest single producer of hydroelectricity.

At present, Irkutskenergo together with JSC Silovii Mashini (Russian: «Силовые машины») is modernizing the aging turbines.

The plan to build the hydroelectric plant was approved in September 1954 and later that year the first workers and machines arrived at Bratsk.

On December 12, 1955, Bratsk was officially converted from a workers settlement into a city by the decree of the Presidium of the Supreme Soviet of the RSFSR.

Eventually, a lot of the workers were awarded state prizes and the plant became a symbol of the industrial development of Siberia.

On July 18, 1961, the Bratsk Reservoir started filling (level raised up to 100 m so that it became the largest artificial lake of that time).