The first phase of the Milford Wind Corridor Project was completed and is the largest wind facility in Utah and one of the largest in the West. The electricity generated is bound for California to help achieve the Los Angeles goal of 20 percent renewables by 2010.
In the United States in 2007 coal was responsible for generating 2,016,456 gigawatts of power. As 1 gigawatt equals 1,000 megawatts you would need 1.3 billion (2,016,456,000 megawatts / 1.5) wind turbines to replace coal. And coal only accounts for 48% of electricity production.