- Hydro's ownership: 70.22 %
- Installed capacity: 96 MW
- Production: 391 GWh / year*
- Number of generators: 2
*Hydro's share of production
Svelgfoss began operating in 1907 and was Europe's first hydropower plant when it was finished.Svelgfoss began operating in 1907 and was Europe's first hydropower plant when it was finished.
Svelgfoss was originally built to provide electricity to Hydro's first potassium nitrate plant at Notodden. Between 1909 and 1915, production was expanded at Lienfos and Svælfos II, and in 1958, these three power plants were merged into the current Svelgfoss power plant.
Svelgfoss uses a water drop of 70 meters from Tinnelva, and produces electricity from two Francis turbines.