Estimates for the amount of thick sludge that gushed from a Tennessee coal plant last week have tripled to more than a billion gallons, as cleanup crews try to remove the goop from homes and railroads and halt its oozing into an adjacent river.
The sludge, a byproduct of the ash from coal combustion, was contained at a retention site at the Tennessee Valley Authority's power plant in Kingston, about 40 miles east of Knoxville. The retention wall breached early Monday, sending the sludge downhill and damaging 15 homes. All the residents were evacuated, and three homes were deemed uninhabitable, according to the TVA.
TVA's initial estimate for the spill was 1.8 million cubic yards or more than 360 million gallons of sludge. By Friday, the estimate reached 5.4 million cubic yards or more than 1 billion gallons -- enough to fill 1,660 Olympic-size swimming pools.
Environmental advocates say the ash contains concentrated levels of mercury and arsenic.
"There's a lot of ash there," spokesman John Moulton said. "We are taking this very seriously. It is a big cleanup project, and we're focused on it 24 hours a day." Initial TVA estimates put the cleanup timeline at four to six weeks, but Moulton said the agency will no longer say how long it expects the effort to take. Environmentalists say it could take months or even years to clean up the mess.
Video footage showed sludge as high as 6 feet, burying porches and garage doors. The slide also downed nearby power lines, though the TVA said power had been restored to the area. An estimated 78,000 cubic yards, or 15.7 million gallons, of sludge covered local railroad tracks.
Many thanks Leah!
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