The developer, owned by US billionaire Phil Anschutz, seeks to install as many as 1,000 turbines – worth up to 3GW of capacity – in phases across two sites in south central Wyoming, in what would be known as the Chokecherry and Sierra Madre wind farms.

The project has received considerable support at the federal level, with the vast area – much of it a working cattle ranch – having been approved as suitable for wind development by the Secretary of the Interior in autumn 2012.