25. TVA Kingston Fossil Plant Coal Fly Ash Slurry Spill It’s a pretty crazy name huh? It’s real though. In an 84 acre solid waste containment area, an ash dike ruptured in the early hours of December 22, 2008. This fossil plant in Roane County, Tennessee held 1.1 billion gallons of coal fly ash slurry which was expelled causing a mudflow wave. Although there were no reported fatalities or injuries (thank goodness), it damaged several properties and government facilities.