Iberdrola signs a new long-term power supply agreement in Washington state

Iberdrola has signed a new long-term power purchase agreement (PPA) with Puget Sound Energy in Washington State through its US subsidiary Avangrid.

The agreement strengthens cooperation between the two companies in the Pacific Northwest and ensures the supply of clean energy from the Big Horn I wind farm, located in Klickitat County. The facility, with a capacity of 199.5 MW, generates enough electricity to supply around 70,000 homes per year.

This new agreement builds on an already established relationship between Avangrid and PSE, which have previously signed three other projects in the Pacific Northwest region — Golden Hills, Lund Hill and Klondike III — totalling more than 600 MW of combined capacity.

Under the PPA, Avangrid will upgrade key components of Big Horn I, which has been in operation since 2006, to extend its useful life, increase its performance and ensure its operation for the next two decades through a repowering process. The works will create around 200 jobs during the construction phase and the upgraded facility is expected to enter operation in 2028.

This agreement reinforces Iberdrola’s commitment to the development and modernisation of generation assets in the United States, as well as long-term solutions that provide stability to the electricity system and respond to growing demand. The Group has more than 11,000 MW of installed capacity in the country, across nearly 100 plants in 25 states.