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    Saltos del Nansa

    Chain of four hydroelectric plants, which together have a combined capacity of 48.7 MW, capable of supplying clean energy to some 52,000 homes.

    The so-called "Saltos del Nansa" comprise a chain of four sequential hydroelectric plants, with a total capacity of 48.7 MW, including 4 waterfalls. The first of these plants, at the base of the dam, regulates the chain (CH Peña de Bejo), feeding the rest of the plants which are run-of-the-river (CH Rozadio, CH Celis and CH Herrerías). These plants, commissioned between 1945 and 1952, can supply clean energy to some 52,000 homes.

    GENERAL INFORMATION

    Location
    River Nansa Valley , Cantabria, Spain
    Capacity
    48.7 MW
    River course
    River Nansa

    PEÑA DE BEJO PLANT

    Capacity: 28.8 MW
    Conventional hydroelectric plant (La Cohilla reservoir)
    Operational since 1974
    Double-runner, double-injector Pelton turbine. Head: 328 m.
    La Cohilla Reservoir
    , with a capacity of 11.8 million m3 and a 116-m high double-curvature arch dam with a crest 284 m long and 2 m wide

    ROZADIO PLANT

    Capacity: 12.6 MW
    Run-of-the-river plant
    Operational since 1945
    One unit has a double horizontal runner, double-injector Pelton turbine. The other unit is a Francis turbine
    Maximum gross head
    202.13 m for the Pelton turbine and 204.57 m for the Francis turbine

    CELIS PLANT

    Capacity
    6.3 MW
    Run-of-the-river plant
    Operational since 1952. Two horizontal-shaft Francis turbines located on both sides of a single alternator
    Maximum gross head
    102 metres

    HERRERIAS PLANT

    Capacity
    9 MW
    Run-of-the-river plant
    Operational since 1950. Two horizontal-shaft Francis turbines
    Maximum gross head
    65 m
    Ownership
    ACCIONA Energía

    HIGHLIGHTS

    • This plant makes maximum use of the hydroelectric potential of the River Nansa
    • The La Cohilla dam was the highest in Spain and the third highest in Europe when it was built (1950).

    Image Gallery

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    Seira, Huesca (Spain)

    100-year old run-of-the-river plant.

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    Palo, Huesca (Spain)

    Hydroelectric dam with a capacity of 67 MW.

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