Irkutsk region. Bodaibo area. July 1, 1957. Mamakan River at the confluence of the river Vitim. Court berth. Unloading the goods for construction. Preparation of geological party Vitimopatomskoy expedition to move up the river Mamakan. Geologists LB Revyakin, VP Tikhonov, VM Utushkov and others at work. The territory of the future of the dam. Construction of residential houses for builders of hydroelectric power.