The construction of the three power stations and dams in the area north of Vestmanna was done in the period from 1953 to 1961. The hydropower station with two turbines in the northern part of Eysturoy (Ei5i) was connected to the system in 1989 and extended with a third turbine in 2003. Their expected total lifetime is up to 100 years, so most of the plants still have many years of production left. The annual production of hydropower in the Faroe Islands is around 106,000 MWh (or 33% of the annual electricity consumption).