Irkutsk region. Bratsk region. Construction of Bratsk hydroelectric power. September 16 - October 10, 1957. Movement of trucks to the island Smooth, loading soil. Deposition of soil in one of the ducts of the Angara River. Pipe welding. Pumping water out of the pit. Operate dredges, bulldozers, hydraulic giant. Builders, bulldozer, surveyors at work.