This small power station, which is built into the dam itself, makes use of the five metre drop from Lake Nisser to Haukerhyl.
Nisserdam power station is situated in Nissedal Municipality in Telemark. The municipality has a population of 1,451, and covers an area of 905 km², approximately 13% of which is water. Nisserdam is one of five power stations in the municipality.
The power station is located inside the dam that regulates the level of Lake Nisser.
Nisser is the second biggest lake in Telemark, and is drained by the Nisserelva, which later merges with the Fyreselv to form Nidelva. The lake and rivers all lie within the Arendal drainage basin.
Wikipedia, Agder Energi’s own data.