TXU Energy has signed the largest single government contract for renewable energy in US history with Dyess Air Force Base. The two-year contract will provide about 78 million kWh of electricity each year for the nearly 600 square mile facility, or 100% of the air base's electricity needs. The purchase represents 25% of all federal government renewable energy contracts nationwide. TXU will provide the power from its current portfolio, which includes six renewables projects with a capacity of 386 MW. The utility buys wind generation from Trent Mesa, Indian Mesa and Woodward Canyon projects, all in West Texas, and will begin buying power from Cielo Wind Power's 240 MW Noelke Hill wind farm later this year (Windpower Monthly, August 2002). TXU says it buys three times the amount of renewables than is required by the Texas renewables portfolio standard. The nearest wind project to Dyess is the Trent Mesa project.