Siemens Energy has received contracts to service four wind farms in Washington and Oregon, US.

The firm will provide warranty maintenance services for a total of 114 SWT-2.3-93 wind turbines in the Windy Flats and Windy Flats Extension wind farms in Washington, worth a total of $55m.

Working in Oregon, Iberdrola Renewables has awarded the firm a five-year extension on service, warranty and maintenance contract for the 44 wind turbines in their Klondike III wind project.

In addition, Siemens will continue to service 89 wind turbines at Summit Power’s White Creek wind farm in Washington for another two years.