Springerville Generating Station Unit 3

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This article is part of the Coal Issues portal on SourceWatch, a project of CoalSwarm and the Center for Media and Democracy. See here for help on adding material to CoalSwarm.

Springerville Generating Station Unit 3 is one of two new coal plants at the site, which already had two other existing 380 MW units. Tucson Electric Power Company (TEP) operates the unit and output is divided among TEP (100 MW), Salt River Project (100 MW) and Tri-State Generation and Transmission Association (218 MW).[1] Coal is supplied by the North Antelope Rochelle Mine, south of Gillete, Wyoming.[2]

Springerville Units 3 and 4 were the subject of a lawsuit brought by Arizona Center for Law in the Public Interest on behalf of Western Resource Advocates and Grand Canyon Trust. After a series of court decisions and hearing, a settlement was reached that allowed construction of the plants in exchange for lowered emissions and investment in renewable energy and energy efficiency programs.[3]

On May 6, 2008, the Sierra Club sent a maximum achievable control technology (MACT) notice letter to Tucson Electric requiring the company to install technology to control mercury and other hazardous air pollutant emissions from the proposed units. By July 2008, Unit 3 was operational.[4]

On March 18, 2010, the Arizona Department of Environmental Quality issued a revised, draft Title V operating permit for the Springerville Station, which incorporates mercury emission limits for the project. Springerville Generating Station Unit 4 began operating in December 2009.[4]

Project Details

Sponsor: Tucson Electric Power Company
Location: Springerville, AZ
Capacity: 418 MW
Type: Pulverized coal
Projected in service: 2006
Status: Operating (7/2006)


Citizen Groups



  1. Springerville Generating Station Expansion, corporate summary of project, Tucson Electric, accessed January 2008.
  2. Springerville Generating Station, corporate summary of project, Tri-State Generation & Transmission, accessed January 2008.
  3. Air Quality and Clean Energy: Springerville Power Plant, Grand Canyon Trust, accessed January 2008.
  4. 4.0 4.1 "Stopping the Coal Rush", Sierra Club, accessed March 2010.

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