Tryokhgorny is a Russian town, a Closed Territorial-Administrative Facility in the Chelyabinsk Region. In the Soviet era the town was confidential and was named Zlatoust-36, in spite of the fact that the town is situated at the distance of around 100 km from Zlatoust, near the town of Yuryuzan.

Its population is 34.5 thousand people (as of 2009).

The town stands on the Yuryuzan River.

History of Tryokhgorny

The resolution of the Council of Ministers of the USSR of January 24, 1952 No made the decision to build Plant No. 933 on production of atomic bombs. Konstantin Arsenyevich Volodin, who was earlier heading the serial plant No. 551 KB-11 was appointed the plant director.

On August 1, 1955 the plant started implementation of the first state order. In August of the same year two tactical aviation nuclear bombs "Tatyana" were produced.