Masinga Dam is an embankment dam on the Tana River, the longest river in Kenya. It straddles the border of Embu and Machakos Counties in Eastern Province and is located about 100 km northeast of Nairobi.Construction of the dam began in 1978. The dam was completed in 1981. It is owned by Tana and Athi Rivers Development Authority (TARDA). The dam is used for power production and is part of the Seven Forks Scheme.