Exploiting the full potential of the River Nansa
CLEAN, NON-POLLUTING ENERGY
Ensure access to affordable, reliable, sustainable and modern energy for all
1 in 8 people still do not have access to electricity. In order to ensure access to affordable, reliable, sustainable and modern energy for all, it is necessary to increase the use of renewable energy from 25 % today to 38 % in 2025.
ACCIONA is positioning itself as a key player in addressing the growth in energy demand while curbing the progress of global warming and promoting the transition to a decarbonized energy model.
Take urgent action to combat climate change and its impacts
The generation and use of energy is responsible for 74 % of total greenhouse gas emissions in the world. This activity is the largest contributor to global warming. Investment in renewable energy, energy efficiency and other low carbon technologies will continue to be essential to meet the new needs of humanity and to minimise their negative impact on the environment.
ACCIONA considers the fight against climate change and its related effects to be a strategic priority. The Company is working to mitigate greenhouse gas emissions in order to contribute to the progress of society and respond to the main challenges of sustainable development in the areas of infrastructure, water and energy, leading the transition to a low-carbon economy.
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.
- Location: Valley of the River Nansa. Cantabria. Spain.
- Capacity: 48.7 MW.
- River basin: River Nansa.
- Owner: ACCIONA.
PEÑA DE BEJO PLANT
- Capacity 20.8 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.
- 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).
- 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.
- Capacity: 9 MW: Run-of-the-river type plant
- In service since 1950: Two horizontal-shaft Francis turbines.
- Maximum gross fall: 65 m.
- 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).
Peña de Bejo plant
Foot-of-the-Prey Plant at La Cohilla Reservoir. With a capacity of 11.8 Hm3, it has a double-curved vault dam 116 m high and the crest is 284 m long and 2 m wide. It has a Pelton turbine, double horizontal impeller and double injector
- Capacity: 20.8 MW
- Foot-of-the-dam plant (La Cohilla reservoir)
- In service since 1947
- Fall: 328 m
Peña de Bejo in images
Rozadío in images
Herrerías in images
The La Cohilla dam in images