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Tryokhgorny

Closed town in Chelyabinsk Oblast, Russia, located in the western part of the oblast 200 kilometers (120 mi) from Chelyabinsk. Population: 33,670 (2010 Census).
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.

Tryokhgorny on the map.

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