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).
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