Bjelland power station lies in the mountains just north of the village of Bjelland in Marnardal Municipality.
Bjelland power station is situated in Marnardal Municipality in Vest-Agder. The municipality has a population of 2 290, and covers an area of 395 km², approximately 4% of which is water. Bjelland is one of several power stations in the municipality.
The power station lies along the middle section of the River Mandalsåni, which is part of the Mandal river system.
http://webby.nve.no/publikasjoner/rapport/2013/rapport2013_52.pdf, Wikipedia, Agder Energi’s own data.