The owners of a major coal power plant in Arizona, which supplies the Los Angeles Department of Water & Power, face up to $1.1 billion in costs to comply with proposed federal air pollution control requirements. The rules, however, wouldn\u2019t take effect until the current partnership agreements between the utilities that own the 2,250 MW plant expire. \u201cWe will be able to breathe cleaner, healthier air and preserve the visibility essential to the economic vitality of the region,\u201d stated Jared Blumenfeld, U.S. Environmental Protection Agency\u2019s Pacific Southwest regional administrator. The U.S. EPA outlined the pollution control requirements in a Jan. 18 proposal. It would require the Navajo Generating Station to cut nitrogen oxide emissions 84 percent by 2023, which is five years longer than expected. The brownish plume from the coal plant diminishes visibility at national parks, like the Grand Canyon, which alone attracts 4 million visitors annually, according to the agency. John Sullivan, chief resources executive for plant operator Salt River Project, stated that \u201cEPA appears to have attempted to take into consideration the complex timing issues that this decision creates for the Navajo Generating Station owners.\u201d The Sierra Club immediately endorsed the proposed rules, calling them \u201clong overdue.\u201d The rules would help protect Arizona\u2019s \u201c$686 million outdoor economy\u201d and thousands of related jobs, according to Andy Bessler, Southwest organizing representative for Sierra Club\u2019s Beyond Coal campaign. The ownership agreement begins to expire in 2019. LADWP, one of the owners, plans to end its 477 MW interest in the plant by 2015, four years ahead of schedule (Current, Oct. 12, 2012). California law prevents state utilities from renewing their ownership agreements in out-of-state coal plants once they expire. So even if Los Angeles does not end its interest early as planned, it would be out by the time the proposed requirements had to be met. Federal regulators would require the plant to be retrofitted with selective catalytic reduction technology to cut its nitrogen oxide emissions by 28,500 tons\/year. Salt River estimates that would cost $1.1 billion. The agency proposed the requirements after three federal agencies pledged to do what they can to maintain the plant and develop replacement power if it\u2019s closed or downsized. The federal Bureau of Reclamation uses about one-fourth of its power to pump water from Hoover Dam through the Central Arizona Project for irrigation and drinking water as far south as Tucson (Current, Jan. 11, 2013). The Navajo Generating Station is co-owned by the U.S. Bureau of Reclamation, Salt River Project, Los Angeles Dept. of Water & Power, Arizona Public Service, Nevada Power, and Tucson Electric Power.