First Wind finalized four 20-year PPAs with Rocky Mountain Power, a division of PacifiCorp and part of Berkshire Hathaway Energy. As part of the PPAs, Rocky Mountain Power will buy the output of the planned 320-MW Four Brothers solar development, which includes four, separate fully permitted 80-MW project sites. Rocky Mountain Power’s purchase is made in connection with its obligation under the federal Public Utility Regulatory Policies Act, or PURPA, and follows seven similar PURPA agreements for First Wind’s 20-MW Seven Sisters projects. The Four Brothers solar portfolio, which combined would be the largest solar development in Utah to date, includes four separate 80 MW solar photovoltaic projects. Once complete, the combined generating capacity of the four projects will be more than 800,000 MW-hours per year. Construction is slated to begin in 2015 with a target completion date in 2016.