The Hopkins Ridge wind farm in Washington state, was built by RES under an Engineering, Procurement & Construction (EPC) contract for the energy utility Puget Sound Energy (PSE). It comprises 83 Vestas turbines, each rated at 1.8MW. Construction began in March 2005 and the final turbine was commissioned on 27 November, after only 8 months.

Hopkins Ridge was RES's third major construction project completed in 2005.

Information on the Project