Geologists are studying a map of the area, making notes at the site of the future construction of the Nurek hydroelectric power station. Surveyors tents on the bank of the river. Vakhsh in Pulisangi gorge. Explosions in the mountains. Workers are crushing the rock with electric drills. A column of tractors drives across the bridge over the gorge. Types of mountains, r. Vakhsh and the villages of Nurek, near which construction begins.