From Alternet: An environmental disaster of epic proportions has occurred in Tennessee. Monday night, 2.6 million cubic yards (the equivalent of 525.2 million gallons, 48 times more than the Exxon Valdez spill by volume) of coal ash sludge broke through a dike of a 40-acre holding pond at TVA's Kingston coal-fired power plant covering 400 acres up to six feet deep, damaging 12 homes and wrecking a train.
According to the EPA the cleanup will take at least several weeks, but could take years. Officials also said that the magnitude of this spill is such that the entire area could be declared a federal superfund site.
Read Alternet's report. With aerial video.