cor. 1. Bratsk Sea. The road to the city of Bratsk. Dam of the Bratsk Hydroelectric Power Station. The city of Ust-Ilimsk. The head of the technical commission of Bratskgesstroy for the acceptance of the pit A. N. Marchuk talks with the engineers. Head of construction of the Bratsk hydroelectric power station I.I. Naymushin talks with the deputy. the head of Bratskgesstroy Yanin and the head of the Ust-Ilimsk hydroelectric power station V.A. Gerasimenko at the dam of the Bratsk hydroelectric station. Clearing the pit before flooding. Flooding of the pit, analysis of the bottom and explosion of the upper bulkhead. cor 2. Cars with soil are directed to the bed of the Angara river. Backfilling the channel. Rally to mark the end of the river blocking. cor. 3. The Angara River is higher than the dam of the Ust-Ilimskaya HPP. The Losyata Islands before the flooding. The village of power engineers.