The Anschutz Corporation will begin construction next year of its long-awaited four-state $3bn TransWest Express transmission line that will provide a direct conduit for 20,000GWh/yr of low-cost wind energy from Wyoming to California and desert southwest states.

On Friday in Wyoming, the developer obtained the last required state and federal permit required to build and operate the planned 730-mile (1,175km) project, one of the longest US merchant transmission initiatives in decades.