Rybinsk Reservoir, artificial lake, c.2,000 sq mi (5,200 sq km), NW European Russia. It was formed in 1941 between the upper Volga River and its tributaries, the Mologa and Sheksna rivers, with the completion of the dam and hydroelectric station at Rybinsk. The reservoir is the southernmost component of the Volga-Baltic Waterway.
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