The water is carried in a 22 km long tunnel from Lake Ustevatn to the power station which is located inside the mountain near Kleivi in Ål Municipality.

Usta power station utilises the head from the Lakes Ustevatn and Rødungen west of Hallingdal valley in Buskerud County. The picture shows the main building entrance and the front gate to the power station, which is located inside the mountain.

Parts of the head between the Lakes Finsevatn and Nygårdsvatn is utilised in Ustekveikja power station.

Lake Rødungen is located in the mountain area between Hallingdal and Numedal in Buskerud County. A six km long tunnel leads the water from Lake Rødungen to the basin at Usta power station. In this way it is possible to transfer water from Ustevatn to Røungen, where the water is stored..

Several sills have been built in Usteåne river in order to keep up the water surface in periods with low flow of water.

The building of Usta power station started in 1963, and the power station was commissioned two years later. A large switching gear is built in connection with Usta power station, where 420 kV power lines from Aurland, Hol I, Ådal og Dagali are connected. The power is transferred further down Hallingdal into the City of Oslo.

The switching gear is located on the southern side of the valley, near Kleive; it is easily seen from the Highway No.7.