The Southern Environmental Law Center, representing Appalachian Voices and the Sierra Club, sent a formal notice of intent to sue the Tennessee Valley Authority on Monday, asserting that the utility’s development of a new methane gas facility near its Kingston coal plant violates provisions of the Clean Air Act. The Kingston plant, which has operated for 70 years and was the site of a significant coal ash spill in 2008, is among the utility’s least efficient and most expensive generating stations.
The TVA initially committed to retiring the Kingston coal facility in 2024, having determined that continued operation posed environmental and economic risks. To facilitate the transition, the utility proposed replacing the coal plant with a natural gas facility. Under this plan, the TVA obtained a “minor modification” permit by claiming the fuel switch would not result in significant pollution increases, thereby avoiding more stringent Clean Air Act requirements.
The situation changed in February when the TVA announced it would operate both plants simultaneously, reversing its earlier retirement commitment. The utility’s own assessment indicated that running both facilities requires a “major source” permit, which would mandate pollution impact studies and modern emission control technologies at the new gas facility. Instead, the TVA proceeded with construction using only the less stringent minor permit while allocating hundreds of millions of dollars to upgrade the aging coal plant, according to the legal challenge.
Environmental advocates contend that operating both facilities would significantly increase harmful air emissions in the region, contributing to respiratory illnesses, asthma, heart disease, and other health conditions. The groups also argue the utility reversed its retirement decision to support power generation for artificial intelligence data centers, a shift that will ultimately increase consumer electricity costs. The 60-day notice provides the TVA an opportunity to address the alleged violations before litigation proceeds.