Types of the Volga River, dams of the hydroelectric pit, earthworks, station buildings. Excavators, excavators, dump trucks are working on digging a water supply channel. Geodesist Ya. N. Chervontsev at work. Loaded dump trucks are driving along the road. A group of engineers at construction, among them the chief engineer of the first section P. P. Sizov. Welders G. A. Koval and others for the installation of the turbine. Adjustment work on the lock is carried out by: fitter V. D. Korshunov, senior engineer of the production and technical department N. A. Komarov, senior foreman P. D. Kulikov, electric welder A. F. Shcheberstov and others. A bulldozer removes the top layer of soil from the cofferdam separating the sluice canal from the Volga River. Bulldozer driver A. P. Kuzin at work. The beginning of the flooding of the airlock with water. Dump trucks and tractors drive along the bottom of the lock. Builders greet the first boats passing through the lock.