Alterra Power Corp., the British Columbia-based renewables developer, announced the acquisition of a 320MW portfolio of wind projects known as Boswell Springs in Wyoming, with plans to sell the power under long-term PPAs with Warren Buffett’s Rocky Mountain Power.

The projects, due on line in 2020 and expected to qualify for the full production tax credit, represent the “next major step in our growth plans”, says Paul Rapp, Alterra’s vice president of project development.