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Four Corners Power Plant has been helping ensure reliable supply of energy for APS for 50 years. It is a 2-unit, 1,540-megawatt Plant, located on the Navajo Indian Reservation west of Farmington, New Mexico, and is operated by APS. Fueled by low-sulfur coal from the nearby Navajo mine and cooled by the nearby Morgan Lake, the plant is owned by APS and 4 other utilities in the Southwest. APS' stake in Four Corners makes 970 megawatts of energy available to the APS system.

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