On July 31, 2008, United States EPA Region 9 (“Region”) issued a final prevention of significant deterioration (“PSD”) permit (“Permit”) to Desert Rock Energy Company, LLC (“Desert Rock”) pursuant to section 165 of the Clean Air Act (“CAA”), 42 U.S.C. § 7475. The Permit authorizes Desert Rock to construct a new 1,500-megawatt coal-fired electric generating facility approximately twenty-five miles southwest of Farmington, New Mexico.