Ulla-Førre - Norges Kraftstabbur. 

Norway's largest hydroelectric power plant.
Ulla-Førre is a hydropower complex in Suldal, Hjelmeland and Bykle in Norway. It has an installed effect of approximately 2100 MW, and the annual average production is 4,45 TWh (1987-2006). The complex includes the artificial lake Blåsjø, which is made by dams around 1000 meters above the sea level. The power stations in the complex are Saurdal, Kvilldal, Hylen and Stølsdal.