Rybinsk Hydroelectric Station or Rybinsk GES (Russian: Ры́бинская ГЭС) is a hydroelectric station on the Volga and the Sheksna rivers in Yaroslavl Oblast near the Rybinsk town. it is the third of the Volga-Kama Cascade of dams.
Construction began in 1948 and was completed in 1950.
The complex consists of
Installed power is 346.4 MW, average annual production is 644 GWh. Power house has 6 generators with Kaplan turbines, working at 13.4 m head: 4 of 55 MW each and 2 of 63.2 MW each. The dam forms Rybinsk Reservoir. A highway is passing over Volga river by the dam.
The station covers peaks of electricity demand of central Russia. The reservoir is used for annual discharge regulation, boosting enegry production on lower hydroelectric stations on the Volga. The reservoir is used for navigation ( it is the lowest stage of Volga-Baltic Waterway ) and flood control.
Initially the project of a dam in upper Volga considered a dam at 14 km up from Yaroslavl with much less flood area, and preparations had been started. Later the project was reconsidered to an existing one. The Mologa town was flooded.
Construction was supervised by NKVD and forced labour was extensively used. First turbines were started during the most difficult period of World War II, while termal power plants suffered from lack of fuel. The station building was incomplete at that moment, and worked under tarp tent as a roof. Construction was continued after the war, and July 30, 1955 Uglich Hydroelectric Station and Rybinsk hydroelectric stations were officially completed and formed "1st cascade of Mosenergo hydroelectric stations". At that moment station's installed power was 330 MW.
From 1998 to 2002 two of six generator units were replaced, increasing installed power by 16 MW. 4 other units are planned for replacement, too. There are also plans of installing 2 new generating units, increasing installed power up to 505.6 MW.