Blåsjø

Blåsjø
Geographical location	Bykle ( Agder ); Hjelmeland , Suldal ( Rogaland )
	Data
Coordinates	59 ° 22 '14 " N , 6 ° 52' 48" E Coordinates: 59 ° 22 '14 " N , 6 ° 52' 48" E
Altitude above sea level	1055 moh.
surface	84.48 km²
volume	3.1 km³
scope	20.041 km

The Blåsjø is the tenth largest lake in Norway . It is located in Bykle commune in Agder and Hjelmeland and Suldal communes in Rogaland .

Blåsjø is a reservoir and acts as a reservoir for the Ulla-Førreverkene hydropower station . The Saurdal power plant ( Saurdal kraftverk ) is also located at the flood retention basin . The lake has an energy potential of approx. 7.8 TWh per year. As such, the reservoir has the largest energy reservoir in Norway and, with an area of 84.48 km², is the ninth largest lake in the country. Around the lake are some of Norway's largest dams. The entire dam on the lake is 1,300 m long and 255,000 m³ of concrete were used to build it . The structure is Norway's largest concrete dam and was built by the engineering office Chr. F. Grøner A / S. In 1989 the dam received the Norwegian architecture prize Betongtavlen for the use of concrete in an environmentally friendly, aesthetic and technically outstanding way.