The Oskemen Hydroelectric Power Plant (Kazakh: Өскемен ГЭС, Óskemen GES), also known as Ust-Kamenogorsk Hydroelectric Power Plant (Russian: Усть-Каменогорская ГЭС), is a hydroelectric power plant on the Irtysh River near Oskemen in East Kazakhstan Province of Kazakhstan.

It has 4 individual turbines[1] with a nominal output of 82.8 MW (3 were renewed - 95 MW) with a generating capacity of 367.8 MW and generates 1.58 billion kilowatt-hours of electricity per year.

[2] Formerly owned and operated by AES Corporation, in 2023 ownership was transferred to Samruk-Energy.

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