The plant is operated by RusHydro.[3] As of 2009, it was the largest power plant in Russia and the world's sixth-largest hydroelectric plant by average power generation. It provides more than a quarter of RusHydro's generation capacity.[4][5] The plant operated ten type РО-230/833-0-677 hydro turbines[6] manufactured at the Leningradsky Metallichesky Zavod, each with a capacity of 640 MW at 194-metre (636 ft) head.[7] The total installed capacity of the plant is 6,400 MW; its average annual production is 23.5 TWh, which peaked in 2006 at 26.8 TWh.