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EPA Rejects Colorado Haze Plan Over Coal Plant Closures

The agency cites Clean Air Act limits on forced shutdowns alongside concerns over power reliability.

Overview

  • The EPA on Jan. 9 disapproved Colorado’s 2022 regional haze plan, saying the state prioritized mandating coal retirements over statutory requirements and starting a two-year deadline for a revised plan or an EPA-imposed federal plan.
  • Regulators flagged Colorado Springs Utilities’ Nixon Unit 1, saying the planned nonconsensual 2029 closure raises potential takings issues and could jeopardize grid reliability.
  • The Department of Energy last month ordered Tri-State’s Craig Station Unit 1 to operate through March 2026 to support grid stability, prompting repairs to a unit previously slated for retirement.
  • Colorado officials and environmental groups condemned the federal decisions as political and unlawful, warning of higher costs and signaling legal and administrative challenges.
  • EPA leaders argue Colorado can meet visibility goals without mandated closures and contend coal units remain important for affordable, reliable power.