A federal judge has ruled the Tennessee Valley Authority is liable for a massive coal ash spill that polluted surrounding areas in 2008. The Kingston Fossil Plant spill released more than one billion gallons of toxic coal ash, burying homes and roads in what’s believed to be the largest coal ash disaster in U.S. history. In a victory for hundreds of plaintiffs, Federal District Court Judge Thomas Varlan ruled Thursday the TVA can be held responsible for damages.