Partial shutdown proposed for 389-MW Coronado coal unit in Arizona

The Arizona Department of Environmental Quality on Thursday July 21 reported it has proposed a revision to the air quality control permit for Salt River Project’s (SRP) coal-fired Coronado Generating Station to assist in satisfying federal and state environmental protection requirements.

This permit revision requires SRP to select the option of either installing a selective catalyst reduction (SCR) system on the 389 MW Unit 1 or retire it by Dec. 31, 2029.

Until the time SRP decides either of these options, SRP will be required to seasonally curtail the operation of Unit 1 by selecting one of four interim operational strategies. The plant also operates the 384 MW coal-fired Unit 2, which recently installed an SCR system.

About Wayne Barber 4201 Articles
Wayne Barber, Chief Analyst for the GenerationHub, has been covering power generation, energy and natural resources issues at national publications for more than 20 years. Prior to joining PennWell he was editor of Generation Markets Week at SNL Financial for nine years. He has also worked as a business journalist at both McGraw-Hill and Financial Times Energy. Wayne also worked as a newspaper reporter for several years. During his career has visited nuclear reactors and coal mines as well as coal and natural gas power plants. Wayne can be reached at