Allen Fossil Plant has 14 groundwater monitoring wells, 12 of which have been polluted above federal advisory levels based on samples collected between February 16, 2011 and September 25, 2017. Groundwater at this site contains unsafe levels of arsenic, boron, molybdenum, fluoride, lead, manganese and barium.Site description
Allen Fossil Plant is located on the south shore of Lake McKellar outside of Memphis, Tennessee. Allen, a 990 MW facility, was the largest single source of air pollution in Shelby County. The original ash pond, located west of the site and having a surface area of 24 acres, was deactivated and pumped dry in 1992. A chemical treatment pond was built inside the northeast corner of the abandoned ash pond. The active (east) ash pond was commissioned in 1967 and expanded in 1978 to its current footprint of 70 acres. The Environmental Protection Agency has identified the Allen plant as a potential damage case. The plant was retired in 2018, following settlements for Clean Air Act violations. TVA intends to replace the Allen coal boilers with natural gas generators.
For more information about coal ash in Tennessee, see Earthjustice's fact sheet, Tennessee and Coal Ash Disposal in Ponds and Landfill.