Construction of the dam began in 1969 and it was completed in 1975. Construction of the power station was halted twice, from 1975 to 1983 due to the civil war, then again from 1986 to 2001 also due to fighting. The dam was partially destroyed by dynamite in 1990. Along with the power station, sub-stations at Caála, Dango, and Benfica (in Huambo) were inaugurated at the time of completion. The sub-stations and distribution network cost US$80 million.