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WASHINGTON (CN) - The Environmental Protection Agency has halted implementation of some emissions and dust controls at the 2,000 megawatt Four Corners Power Station on the Navajo Nation in New Mexico.

The agency's action comes after it admitted, in a lawsuit brought by the plant's operator Arizona Public Service Company, that sections of the plan detailing the control of dust from flyash and truck operations at the facility were not sufficiently justified to be put into effect.

Four Corners has been the subject of litigation since it opened in 1963, when federal courts ruled that New Mexico had no regulatory authority over a power plant built on tribal lands. As a result, the plant has operated without effective regulation for most of its active life and has gained a reputation as one of the dirtiest coal burning plants in the nation.

Click the document icon on the front page for details and links to the regulation. The document icon under the "EPA, Energy And More" heading leads to other new regulations.

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