Irkutsk region. Bratsk district. Construction of the Bratsk hydroelectric power station. September 16 - October 10, 1957. The movement of dump trucks to Gladky Island, loading of soil. Dumping soil on one of the channels of the Angara River. Welding of pipes. Pumping water out of the pit. Dredgers, bulldozers, and a hydromonitor are in operation. Builders, bulldozer drivers, surveyors at work.