TGM6 diesel locomotive rides on the dam of Rybinsk Reservoir. This is a unique railway line, which leads to an man-made island and passes through the dam and reservoir gateway. Rybinsk Reservoir, informally called the Rybinsk Sea, is a water reservoir on the Volga River, formed by Rybinsk Hydroelectric Station dam, located in the Tver, Vologda, and Yaroslavl regions. At the time of its construction, it was the largest man-made body of water on Earth. The construction of the dam in Rybinsk was started in 1935. The filling of the reservoir started on April 14, 1941, and continued until 1947. Some 150,000 people had to be resettled elsewhere, and the historic town of Mologa in Yaroslavl Oblast along with 663 villages have completely disappeared under the water. In recent years however, it has been increasingly viewed as a typical example of Stalinism for its disregard of the interests of the local people affected by the project. Today the dam is less important for hydroelectric power supply (output is 346 MW) than it used to be, and the ecological damage caused by the reservoir is being reassessed.