Svelgfoss power plant is located in Notodden Municipality in Telemark County.

Ownership: Statkraft is an indirect co-owner through its 66.62 per cent ownership in Skagerak Energi AS
Production: 541 GWh
Power: 96 MW

The current power plant was commissioned in 1958. It draws its operating water from the Tinnelva River, which is part of the Skien watershed. The height of fall is 70 metres.

When the original Svelgfoss I was built in 1907 it was the largest power plant in Europe and the second largest in the world after the facilities at Niagara Falls. Svelgfoss I was built to provide power for Norsk Hydro's first saltpetre plant at Notodden. Later, Lienfoss power plant was completed in 1911 and Svelgen II in 1915. These three power plants have now been merged into the new Svelgfoss power plant.

The power plant is equipped with two generating units with Francis turbines. The installed capacity is 96 MW.

Through its majority ownership in Skagerak Energi AS, Statkraft is co-owner of this power plant.