Ministry of Water Resources and Irrigation
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National Geographic[2] Education and Today in Conservation both date the completion/opening to 21 July 1970; Wikipedia[1][3] gives the 1960-1970 construction span. A separate formal inauguration ceremony took place in January 1971.Egypt's Aswan High Dam, built with Soviet help across the Nile since 1960, was completed on 21 July 1970, creating Lake Nasser and ending the river's annual flood cycle.
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