Sayano–Shushenskaya hydroelectric power station is located on the Yenisei River, near Sayanogorsk in Khakassia. Before the accident, it was the largest hydroelectric power station in Russia and the sixth-largest hydroelectric power station in the world, by average power generation. The plant is operated by RusHydro. On 2 July 2009, RusHydro announced the station's all-time highest electricity output per 24 hours.[1]