Hekni power station is a run-of-the-river plant just below Rysstad in the Setesdal valley, on the east bank of the River Otra.
Hekni power station is situated in Bygland Municipality in Aust-Agder. The municipality has a population of 1 200, and covers an area of 1 312 km², approximately 12% of which is water.
The power station makes use of a 38.5-metre drop from a dam at Tjurrmo.
The power station lies on the River Otra.
Wikipedia, Agder Energi’s own data.