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In page Yenisei:

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The Yenisey proper, from the confluence of its source rivers the Great Yenisey and Little Yenisey at Kyzyl to its mouth in the Kara Sea, is 3,487 km (2,167 mi) long. From the source of its tributary the Selenga, it is 5,075 km (3,153 mi) long.[1] It has a drainage basin of 2,580,000 km2 (1,000,000 sq mi).[2] The Yenisey flows through the Russian federal subjects Tuva, Khakassia[citation needed] and Krasnoyarsk Krai. The city of Krasnoyarsk is situated far upstream on the Yenisey,[3] and the industrial city of Norilsk is nearby on the Arctic Ocean's Taymyr Peninsula.