Wide dynamic range of Akosombo Hydroelectric Project: hydroelectric dam on Lake Volta in Akosombo, Eastern region, Akosombo canyon. The construction of the dam in the Volta Basin resulted in the subsequent creation of Lake Volta. Lake Volta is the Earth's largest man-made lake and artificial lake, covering 8,502 square kilometres (3,283 sq mi), which is 3.6% of Ghana's landform.