Tennessee Clean Water Network v. Tennessee Valley Authority, No. 17-6155 (6th Cir. 2018)Annotate this Case
Tennessee Valley Authority (TVA) operates the coal-fired electricity-generating Gallatin Fossil Plant on a part of the Cumberland River called Old Hickory Lake, a popular recreation spot. The plant supplies electricity to approximately 565,000 households in the Nashville area but generates waste byproducts, including coal combustion residuals or coal ash. The plant disposes of the coal ash by “sluicing” (mixing with lots of water) and allowing the coal ash solids to settle unlined man-made coal ash ponds adjacent to the river. The plant has a permit to discharge some coal combustion wastewater, which contains heavy metals and other pollutants, into the river through a pipe. Other wastewater is allegedly discharged through leaks from the ponds through the groundwater into the Cumberland River, a waterway protected by the Clean Water Act (CWA), 33 U.S.C. 1251. The district court found that TVA violated the CWA because its coal ash ponds leak pollutants through groundwater that is “hydrologically connected” to the Cumberland River without a permit. The theory is called the “hydrological connection theory” by the federal Environmental Protection Agency (EPA). The Sixth Circuit reversed, finding no support for the hydrological connection theory in either the text or the history of the CWA and related environmental laws.