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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

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

discover other flagship projects

Seira Hydroelectric Power Plant

Seira, Huesca (Spain)

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

Mediano Hydroelectric Power Plant

Palo, Huesca (Spain)

Hydroelectric dam with a capacity of 67 MW.

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