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Another facility located in the Texas countryside , Roscoe Wind Farm spans four counties and comprises 634 units . In 2009 , the year of its commission , the Roscoe facility was actually the largest wind farm in the world though it has since been overtaken . Having cost more than $ 1bn to build , the facility is now owned and operated by E . ON Climate & Renewables . The wind farm provides enough power for over 250,000 Texan households .

Located near Arlington , the Oregonbased Shepherd ’ s Flat Wind Farm is made up of 338 wind turbines . The facility was approved in 2008 with construction by Caithness Energy beginning the following year , and it officially opened in 2012 . General Electric supplied the wind turbines which each have a capacity of 2.5MW , and altogether work to supply electricity for Southern California Edison .

SEPTEMBER 2018