![[logo] US EPA](https://webarchive.library.unt.edu/eot2008/20090511080615im_/http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Air Actions, Navajo Nation
| Air Plan Actions Quick Finder | |||||
| Air Actions home | Arizona | California | Nevada | Navajo Nation | |
On this page:
Final Actions
EPA Finalizes Clean Air Plan for Four Corners Power Plant
April 30, 2007: Final action on Source-specific Federal Implementation Plan for Four Corners Power Plant
EPA finalized a Federal Implementation Plan (FIP) under the Clean Air Act (CAA) to regulate emissions from the Four Corners Power Plant (FCPP), located on the Navajo Indian Reservation in New Mexico. The purpose of this FIP is to ensure protection of tribal air resources. The plant previously followed emissions limits in the New Mexico State Implementation Plan. However, EPA’s promulgation of the Tribal Authority Rule clarified that State air quality regulations generally could not be extended to facilities located on the reservation. This FIP establishes federally enforceable emissions limitations for sulfur dioxide, nitrogen oxides, total particulate matter, and opacity, and a requirement for control measures for dust. The plan includes significant sulfur dioxide reductions from the facility's historic highs at the 5-unit 2,040 megawatt Four Corners plant, which began operations in 1962. The reductions are the result of a partnership between the Navajo Nation, the Arizona Public Service, the National Park Service, Environmental Defense, Western Resource Advocates, and New Mexico Citizens for Clean Air and Water.
Related Documents
- Four Corners Power Plant: Final Rule
- Press Release (4/30/07)
- Fact Sheet
- Response to comments (PDF) (31 pp, 85K, About PDF)
Contact Information
Rebecca Rosen (rosen.rebecca@epa.gov)
Office of Air Planning
EPA Region 9
(415) 947-4152
Upcoming Actions
EPA has opened a docket 
regarding the implementation of the Regional Haze Rule in the Navajo Nation. In order to evaluate whether we should develop a Federal Implementation Plan pursuant to our authority under the Clean Air Act and the Tribal Authority Rule, Region IX has requested that certain sources operating in the Navajo Nation provide an analysis of the Best Available Retrofit Technology (BART) applicable to their emission units, and we have initiated consultation with potentially impacted States regarding these analyses. This docket is provided for information-sharing purposes, and any final action to implement the Regional Haze Rule for the Navajo Nation would only be made after the publication in the Federal Register of a proposal, the solicitation of public comment, the publication of a response to comments, and additional consultation with impacted States and the Federal Land Managers of potentially impacted Class I areas. Additional documents that are relied upon in any future rulemaking on this topic will be added to this docket as they are generated or received.
Steve Frey (frey.steve@epa.gov)
Office of Air Enforcement
(415) 972-3990
Anita Lee (lee.anita@epa.gov)
Office of Air Permits
(415) 972-3958
Scott Bohning (bohning.scott@epa.gov)
Office of Air Quality Analysis
(415) 947-4127
Proposed Actions
Four Corners Power Plant and Navajo Generating Station
September 18, 2006: Source-specific Federal Implementation Plans for Four Corners Power Plant and Navajo Generating Station
EPA is proposing Federal Implementation Plans (FIPs) under the Clean Air Act (CAA) to regulate emissions from the Navajo Generating Station (NGS) and the Four Corners Power Plant (FCPP), located on the Navajo Indian Reservation in Arizona and New Mexico, respectively. The purpose of these FIPs is to ensure protection of tribal air resources. The plants were previously complying with emissions limits in the Arizona and New Mexico State Implementation Plans. However, EPA’s promulgation of the Tribal Authority Rule clarified that State air quality regulations generally could not be extended to facilities located on the reservation. These FIPs propose to establish federally enforceable emissions limitations for sulfur dioxide, nitrogen oxides, total particulate matter, and opacity, and a requirement for control measures for dust.
Related Documents
- Navajo Generating Station: Proposed rule
- Four Corners Power Plant: Proposed rule
- Fact Sheet (PDF) (2 pp, 25K) (Revised 5/1/07)
- Press Release (proposed rule)
Contact Information
Rebecca Rosen (rosen.rebecca@epa.gov)
Office of Air Planning
EPA Region 9
(415) 947-4152