The Seyhan Dam is a hydroelectric dam on the Seyhan River north of Adana, Turkey. The dam was constructed in the 1950s as the first in a series of hydroelectric projects funded by the World Bank. The project was authorized by Prime Minister Adnan Menderes. The project manager was Süleyman Demirel, who later became prime minister and the ninth president of Turkey. The ancient city of Augusta was flooded by the Seyhan Dam Lake in 1955.