Construction of the Vilyui hydroelectric power station in the Yakut ASSR

USSR. Yakut ASSR. December 19, 1975. Head of the mechanical assembly works section of the Vilyuigesstroy main structures department, Hero of Socialist Labor Mikhail Romanovich Dyachek and chief mechanic of the department A. Solona (from left to right) at the construction of the second stage of the Vilyui hydroelectric power station. Sergei Belyaviy/TASS