Construction site. Excavator, winches are working; trolleys are going by. Sightseers at the construction site. The worker works with an electric drill. Built gateway. Channel of the turbine chamber of the hydroelectric station. Workers under a canopy are bending wire, building a house. Fire department building. The dam is in the scaffolding, water is coming through the drain. New railway bridge. Ready-made houses for workers. A special vessel for underwater structures is passing under the bridge.