Ust-Yansky District ( Russian : Усть-Я́нский улу́с ; Yakut : Усуйаана улууһа , Usuyaana uluuha , IPA: [usujaːna uluːha] ) is an administrative and municipal district ( raion , or ulus ), one of the thirty-four in the Sakha Republic , Russia . It is located in the north of the republic in the Yana River delta on the coast of the Laptev Sea and borders with Allaikhovsky and Abyysky Districts in the east, Momsky District in the south, Verkhoyansky District in the southwest, and with Bulunsky District in the west. The area of the district is 120,300 square kilometers (46,400 sq mi). Its administrative center is the urban locality (a settlement ) of Deputatsky . Population: 6,810 ( 2021 Census ) ; 8,056 ( 2010 Census ) ; 10,009 ( 2002 Census ) ; 41,265 ( 1989 Soviet census ) . The population of Deputatsky accounts for 37.0% of the district's total population.
3-551: Saltag-Tas (Russian: Салтага-Тас ) is a mountain in the Ust-Yansky District , Sakha Republic (Yakutia), Russia. At 2,021 m (6,631 ft) it is the highest mountain in the Selennyakh Range , part of the wider Chersky Range (Momsko-Chersk Region), East Siberian System . This Sakha Republic location article is a stub . You can help Misplaced Pages by expanding it . Ust-Yansky District The main rivers in
6-915: The district include the Yana , the Omoloy with the Ulakhan-Kyuegyulyur , the Sellyakh , as well as the Chondon with its tributary the Nuchcha . The Kyundyulyun , northernmost spur of the Chersky Range , rises north of Ust-Kuyga . There are numerous lakes in the district. Orotko is one of the largest. Average January temperature ranges from −32 to −40 °C (−26 to −40 °F) and average July temperature ranges from +4 to +12 °C (39 to 54 °F). Annual precipitation ranges from 150–200 millimeters (5.9–7.9 in) in
9-512: The north to 250–300 millimeters (9.8–11.8 in) in the south. The district was established on January 5, 1967. As of the 1989 Census , the district had a population of 41,265 inhabitants, with an ethnic composition as follows: However, a great deal of the ethnic Russian population left with the economic downturn following the collapse of the Soviet Union , so much so that the district lost over three-quarters of its population during
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