The water from
the watercourses is utilized from a height of 899 and 929 meters above sea
level (a.s.l.) respectively with power stations at intervals between the
reservoirs along the watercourses.
In the Kvina river the water is utilized through 3 power stations before it
is being transferred into the Sira river.
Station (1 x 50MW) utilizes the fall between the Lake Roskreppfjorden
and the Lake 0yarvann.
Kvinen Power Station (1 x 80MW) utilizes the fall between Lake Oyarvann and
Solhom Power Station (2 x 100MW) utilizes the fall between the Kvifjorden
Eake and Lake Homstol where the water is transferred to the Sira
In the Sira river the water is utilized through 4 power stations, the last
Station is Ana-Sira where the water runs out into the North Sea.
DugB Power Station which is equipped with 2 x 100MW reversible pump
turbines, utilizes the upper fall ca 250 m. in the Sira river between the
Lake Gravann and Lake Svartevann.
Tjarhom Power Station (2 x 60MW) utilizes the fall between Lake Gravatn and
Tonstad Power Station, with a fall of 450m, uses the water from both
watercourses down to the lake of Sirdalsvann which together with
Lundevann lake forms the intake reservoir for Ana-Sira Power Station (3 x 50
MW), with a fall of 50m to sea level.
Tonstad Power Station has the largest generating capacity with a total
installation of 960MW.