AGUAYO II

In hours of low demand or high renewable production:

• Surplus electrical energy in the system is used to pump large amounts of water to an upper reservoir, called Mediajo reservoir (upper 10 hm3 reservoir).

At times of high demand or low renewable production:

• Additional electrical energy is required, water is dropped in the lower reservoir, the Alsa reservoir (lower 22.9 hm3 reservoir), to move the turbines, which generate electricity again.

This differential advantage allows its use within the electricity system to compensate for times when there is excess renewable production, accumulating energy, and times of excess demand, generating energy.

In addition to being a cavern power plant inside a mountain and making the most of existing reservoirs, Aguayo II stands out for its compatibility with the conservation of the environment in other aspects.

The expansion will involve improvements in the surroundings of the power plant during its construction such as:

• The improvement of paths in the area.
• The construction of 2 new roads to avoid heavy traffic through the surrounding municipalities.
• The creation of additional landfills.
• Compaction of the power transmission line.

As the project progresses, we will bear in mind the importance of conservation and lower environmental impact through:

• Reforestation of nearby natural areas.
• Habitat recovery.