Kamsko-Ustyinsky District is an administrative and municipal district (raion

Raion

A raion is a type of administrative unit of several post-Soviet countries. The term, which is from French rayon 'honeycomb, department,' describes both a type of a subnational entity and a division of a city, and is commonly translated in English as "district"...

), one of the forty-three in the Republic of Tatarstan, Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

. It is located in the western portion of the republic and borders with Verkhneuslonsky District

Verkhneuslonsky District

Verkhneuslonsky District is an administrative and municipal district , one of the forty-three in the Republic of Tatarstan, Russia. Its administrative center is the rural locality of Verkhny Uslon. District's population: 17,957 ; Population of Verkhny Uslon accounts for 23.7% of the district's...

 in the north, Tetyushsky District

Tetyushsky District

Tetyushsky District is an administrative and municipal district , one of the forty-three in the Republic of Tatarstan, Russia. Its administrative center is the town of Tetyushi. District's population: 27,040 ; Population of Tetyushi accounts for 46.6% of the district's population....

 in the south, Apastovsky District

Apastovsky District

Apastovsky District is an administrative and municipal district , one of the forty-three in the Republic of Tatarstan, Russia. Its administrative center is the urban locality of Apastovo. District's population: 23,105 ; Population of Apastovo accounts for 23.8% of the district's population....

 in the west, and Kuybyshev Reservoir in the east. Its administrative center is the urban locality (an urban-type settlement

Urban-type settlement

Urban-type settlement ; , selyshche mis'koho typu ) is an official designation for a type of locality used in some of the countries of the former Soviet Union...

) of Kamskoye Ustye. District's population: 18,518 (2002 Census

Russian Census (2002)

Russian Census of 2002 was the first census of the Russian Federation carried out on October 9 through October 16, 2002. It was carried out by the Russian Federal Service of State Statistics .-Resident population:...

); Population of Kamskoye Ustye accounts for 26.5% of the district's population.

On July 10, 2011, the Bulgaria

Bulgaria (ship)

Bulgaria was a class 785/OL800 Russian river cruise ship which operated in the Volga-Don basin. On 10 July 2011, Bulgaria sank in the Kuybyshev Reservoir of the Volga River near Syukeyevo, Kamsko-Ustyinsky District, Tatarstan, Russia, with 201 passengers and crew aboard when sailing from the...

, a river cruise ship owned by Kamskoye Rechnoye Parokhodstvo, sank in the Kuybyshev Reservoir near Syukeyevo

Syukeyevo

Syukeyevo is a village in Kamsko-Ustyinsky District of the Republic of Tatarstan, Russia, located on the bank of the Mordovskaya River , 23 kilometers south-west of Kamskoye Ustye, the administrative center of the district. Population: 750 ; 792 ; all ethnic Russians. There is a secondary school...

, after being caught in a storm. A passing tourist ship rescued eighty passengers, but officials feared as many as 128 people may have died.