FOUR CORNERS POWER PLANTAND NAVAJO MINE ENERGY PROJECT EISABOUT THE FOUR CORNERS POWER PLANT

The Four Corners Power Plant is located on tribal trust lands in the New Mexico portion of the Navajo Reservation. Approximately 75% of employees at the plant areNative American.

The Four Corners Power Plant is a coal-fired electric generating station and:• Includesfiveunitsgeneratingapproximately2,100megawatts•Providespowertomorethan500,000homesinthe southwestern United States

CONTINUED OPERATIONOF THE POWER PLANTThe desired future operation of the plant site involves:•DiscontinueoperationofUnits1,2and3duringorpriorto2014• InstallingpollutioncontrolupgradesonUnits4and5•Continuedoperationoftheindependentswitchyardand transmission linesThis scenario would:•Substantiallyreducecoalconsumptionandairemissions•Lowerpoweroutputtoapproximately1,500megawatts•Expandtheashdisposalareainfutureyearswithinthecurrent plant lease boundary

ABOUT THE FOUR CORNERSPOWER PLANT