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Court Rules TVA’s Decision to Build Kingston Gas Plant Broke the Law

September 9, 2026 · CleanTechnica · Score: 37

A federal court has ruled that the Tennessee Valley Authority broke the law when it decided to build its Kingston Gas Plant, a large natural gas facility planned for the site of a 2008 coal ash spill in Tennessee. The U.S. District Court for the Eastern District of Tennessee found that TVA failed to properly study cleaner and cheaper alternatives before committing billions of ratepayer dollars to the project, violating the National Environmental Policy Act. The ruling throws out TVA's environmental review and its formal decision to move forward with the plant.

The lawsuit was brought in 2024 by the Southern Environmental Law Center on behalf of Appalachian Voices, the Center for Biological Diversity, and Sierra Club. The EPA had also warned TVA years earlier that its environmental analysis was inadequate, but TVA went ahead with construction anyway. TVA has asked the court for permission to keep building despite the ruling.

For homeowners in the Tennessee Valley served by TVA, this matters because it could affect what kind of power plants get built and how much that costs on monthly electric bills. Groups behind the lawsuit argue TVA should have weighed cheaper, cleaner options first, which they say would have been better for both electricity costs and air quality. The ruling requires TVA to reconsider its plans and properly evaluate alternatives, though what happens next with the Kingston plant itself is not yet settled.

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