Tryokhgorny (, lit. (a town of) three mountains) is a closed town in Chelyabinsk Oblast, Russia, located in the western part of the oblast from Chelyabinsk. Population: History On January 24, 1952, the Council of Ministers of the USSR issued decree № 342—135сс/оп to build Plant #933 (Instrument Factory) for the production of atomic bombs. Konstantin Volodin headed the new plant. On April 9, 1952, first construction workers arrived to the area. Administrative and municipal status Within the framework of administrative divisions, it is incorporated as the Town of Tryokhgorny—an administrative unit with the status equal to that of the districts. As a municipal division, the Town of Tryokhgorny is incorporated as Tryokhgorny Urban Okrug. Closed status The town is closed because a plant producing nuclear weapons is located there. References Notes Sources External links Official website of Tryokhgorny Tryokhgorny plant Cities and towns in Chelyabinsk Oblast Nuclear weapons program of the Soviet Union Closed cities Naukograds Populated places established in 1952 1952 establishments in the Soviet Union