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Lake, Ghana.
One of the world's largest artificial lakes, it was formed in 1965 when the Akosombo Dam dammed the Volta River and created a reservoir that extends about 250 mi (400 km) upstream to beyond the former confluence of the Black Volta and White Volta rivers. It covers 3,283 sq mi (8,502 sq km), or 3.6% of Ghana's area. It is a major fishing ground and provides irrigation water for farmland in the Accra plains. The dam generates enough hydroelectric power to supply most of Ghana's electricity needs.