Largest Solar power plant in Arizona..

http://www.inhabitat.com/2008/02/25/world%e2%80%99s-largest-solar-power-plant-coming-to-arizona-in-2011/
"the enormous solar plant called Solana will power up to 70,000 homes, and will be the first example in the country of a major utility getting the majority of its energy from solar. The 1900 acre plant will be completed by 2011 – IF AND ONLY IF Congress renews the clean energy tax credit that’s set to expire at the end of 2008."