Tryokhgorny
| Tryokhgorny (English) Трёхгорный (Russian) |
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 Tryokhgorny
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| Administrative status (as of August 2013) | |
| Country | Russia |
| Federal subject | Chelyabinsk Oblast |
| Administratively subordinated to | Town of Tryokhgorny |
| Administrative center of | Town of Tryokhgorny |
| Municipal status (as of August 2013) | |
| Urban okrug | Tryokhgorny Urban Okrug |
| Administrative center of | Tryokhgorny Urban Okrug |
| Statistics | |
| Population (2010 Census) | 33,670 inhabitants |
| Time zone | YEKT (UTC+05:00) |
| Founded | January 24, 1952 |
| Postal code(s) | 456080–456082 |
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Tryokhgorny (Russian: Трёхго́рный, lit. (a town of) three mountains) is a 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);34,290 (2002 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.
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.
The town is closed because a plant producing parts of atomic reactors is located there.
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Wikipedia