Plant facts

Location: LeChee Chapter of the Navajo Nation near Page, Arizona.

Participant summary:

U.S. Bureau of Reclamation






Arizona Public Service Co.



NV Energy



Tucson Electric Power



Service area: NGS serves electric customers in Arizona and Nevada.

Capacity: 2,250 megawatts (MW) from three 750 MW units.

Fuel source: Low sulfur bituminous coal from Peabody Western Coal Company's Kayenta Mine located 78 miles to the southeast. Coal is transported via a dedicated electric train.

Plant construction: Construction began in 1969. The first unit began producing electricity in 1974. Commercial operation of the other units began in 1975 and 1976.

Construction costs: $650 million, including $200 million in environmental-control equipment. An additional $420 million was spent on new sulfur dioxide (SO2) scrubbers in the 1990s, and $45 million was spent from 2009–11 to reduce nitrogen oxide (NOx) emissions.

Employment: NGS employs more than 400 full-time employees, more than 90% of whom are Navajo.

Air quality and emissions: NGS complies with all federal air quality standards and emission limitations.

Electrostatic precipitators capture 99% of the fly ash, which is recycled for use in concrete, cement and other construction materials. Limestone scrubbers remove over 95% of SO2 emissions. Low NOx burners and separated overfire air technology reduce NOx emissions by approximately 40%. Learn more about our environmental standards and regulations here.

Waste management: A successful NGS waste management program focuses on waste minimization. NGS consistently achieves its goal to be a small generator of hazardous waste and, for significant periods of time, meets the more stringent, conditionally exempt small-quantity generator status.