Irkutsk region. Types of terrain where the Bratsk hydroelectric power station will be built. Arrival of the first group of builders to the Bratsk area. The work of surveyors. Demolition work on the Angara River. Construction of a road on the ice of the Angara River. Unloading of mechanisms at construction. Builders' tent camp. Construction of residential buildings in the village of Zeleny. View of the village of Pravoberezhny. Construction of a timber mill. The town of Bratsk. The streets of the town. Landscapes of the Angara River.