Lio power plant is located in Tokke Municipality in Telemark County.

Ownership: 100 %
Production: 225 GWh
Power: 40 MW

The power plant was commissioned in 1969. The main intake for the plant is located in Lake Byrtevatn and its water level is regulated by a roughly 20-metre-high riprap dam.

The power station is situated beside the Rukke bridge about five kilometres from the village of Dalen. The power plant's discharge into the Tokkeåi River above Dalen ensures a certain amount of water in the river, even though the flow is reduced somewhat as a result of the operation of the plant.

Lio power plant has one generating unit equipped with a Francis turbine. The installed capacity is 40 MW.

The power plant uses a gross height of fall of 352 metres.