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Norway
Lars Petter Pettersen

Bitdalsdammen

Nedre Røssåga power plant

Norway / Hydropower / Power plant

The Røssåga power plants are located in Hemnes Municipality in Nordland County.

  • 1955
    Entered into operation
  • 350 MW
    Installed capacity
  • 2,056 GWh
    Annual production

Nedre Røssåga power plant uses the height of fall between Lake Stormyrbassenget and the village of Korgen, while Øvre Røssåga power plant uses the height of fall between Lake Røssvatnet and Lake Stormyrbassenget.

Lake Røssvatnet has a reservoir capacity of 2.35 billion cubic metres, and is Norway's second-largest lake measured by surface area.

The development of the Røssåga power plants involves the municipalities of Hemnes, Hattfjelldal and Grane. The development, which occurred in the 1950s and 1960s, was historically linked to operating the ironworks in Mo i Rana and the aluminium plant in Mosjøen.

A major modernisation and upgrading programme was completed at the Røssåga power plants in 2016.

The modernisation and expansion started in the spring of 2012 and is among the largest hydropower projects in Norway in the 2000s. The total capacity at Nedre Røssåga has been increased from 250 MW to 350 MW. Total annual production increased by around 200 GWh to about 2 150 GWh, equivalent to the consumption of more than 100,000 Norwegian households. For the first time in Norway in decades, some sections of the new waterways were cut using a tunnel boring machine.

The project had a positive environmental impact. In parallel with the increase in power production, conditions were improved for salmon and sea trout in the Røssåga River. Among other things, the river regained a section that supports salmon migration, accounting for 30 per cent of the spawning stock in the entire Røssåga watercourse.

Architect Hans Grinde drew the plans for and participated in the planning of both original Røssåga power plants. Parts of Nedre Røssåga power plant will be preserved as they are, in accordance with a conservation plan drawn up by Statkraft in cooperation with the Norwegian Directorate for Cultural Heritage.

 

Company Ownership share
Statkraft 100%
  • Entry portal at Nedre Røssåga power plant
    Nedre Røssåga
    Erling Nystad

    Entry portal at Nedre Røssåga power plant

  • Nedre Røssåga power station has important decorative and construction details that will be preserved.
    Nedre Røssåga
    Erling Nystad

    Nedre Røssåga power station has important decorative and construction details that will be preserved.

  • The internal generator room has original technical elements and historical information
    Nedre Røssåga
    Erling Nystad

    The internal generator room has original technical elements and historical information.

  • The original control room in Nedre Røssåga is no longer in use.
    Nedre Røssåga
    Erling Nystad

    The original control room in Nedre Røssåga is no longer in use.

  • Nedre Røssåga
    Nedre Røssåga
    Bjørn Grane

    New generating unit in place in machine hall.

  • Nedre Røssåga power plant
    Nedre Røssåga
    Bjørn Grane

    A grand opening ceremony to mark the commissioning of the new generating unit on 18 October 2016.

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