[1] The complex includes the artificial lake Blåsjø, which is made by dams around 1,000 metres (3,300 ft) above the sea level.

The hydroelectric power stations in the complex are Saurdal, Kvilldal, Hylen and Stølsdal, operated by Statkraft.

Its surface swings between 930 and 1,055 metres (3,051 and 3,461 ft) above sea level depending on seasonal weather and power consumption, and it has a shoreline of about 200 kilometres (120 mi).

[4] Statnett plans to upgrade the western grid from 300 kV to 420 kV at a cost of 8 billion kr,[5][6] partly to accommodate the North Sea Link cable[7] from Kvilldal to Blyth, UK.

It operates at an installed capacity of 160 megawatts (210,000 hp), with an average annual production of 583 GWh (2,100 TJ).