PacifiCorp will proceed with a $3bn wind and related transmission expansion plan after it received two final state approvals needed to advance the Energy Vision 2020 initiative, said officials at the utility holding company.

Plans call for adding three new wind projects totaling 1.15GW of power generation capacity and a new 140-mile (225km) transmission line in Wyoming, and repowering 900MW of existing facilities in Washington State and Wyoming.