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    NANSA FALLS

    A chain of four hydroelectric plants with a total capacity of 48.7 MW that can supply clean energy to around 52,000 homes

    Saltos del Nansa (Nansa Falls) is made of up of four successive power plants with a total capacity of 48.7 megawatts (MW). It has four waterfalls. The first (Peña de Bejo), at the foot of a dam, regulates the chain and feeds the remaining plants, which are run-of-the-river units (Rozadio, Celis and Herrerías). The plants, which entered service between 1945 and 1952, can supply clean energy to round 52,000 homes.

    GENERAL INFORMATION

    Location
    Valley of the River Nansa. Cantabria. Spain.
    Capacity
    48.7 MW.
    River basin
    River Nansa.
    Owner
    ACCIONA Energy.

     

    PEÑA DE BEJO PLANT

    Capacity 28.8 MW
    Foot-of-the-dam plant (La Cohilla reservoir).
    In service since 1947
    Pelton turbine, dual horizontal rotor and dual injector. Fall: 328 m.
    La Cohilla reservoir
    11.8 hm3, with a double-curved arch dam 116 m high. The crown is 284 m long and 2 m wide.

     

    ROZADIO PLANT

    Capacity: 12.6 MW
    Run-of-the-river type.
    In service since 1945
    One set has a dual horizontal rotor and dual injector Pelton turbine. The other is a Francis turbine.
    Maximum gross fall
    202.13 m (Pelton) and 204.57 m (Francis).

     

    CELIS PLANT

    Capcity
    6.3 MW.
    Run-of-the-river type plant
    In service since 1952.Two horizontal-shaft Francis turbines located on either side of a single alternator.
    Maximum gross fall
    102 m.

    HERRERIAS PLANT

    Capacity
    9 MW.
    Run-of-the-river type plant
    In service since 1950. Two horizontal-shaft Francis turbines.
    Maximum gross fall
    65 m.

    Key Points

    • The plants take advantage of all the hydroelectric potential of the river Nansa
    • The La Cohilla dam was the highest in Spain and the third highest in Europe at the time it was built (1950).

    IMAGE GALLERY



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