HARRIMAN, Tenn. — TVA officials say the coal slurry spill from a burst dam was three times as large as initially estimated.

An aerial survey showed 5.4 million cubic yards of ash spilled when the dike for the Kingston Coal Plant slurry pond broke Monday.

At a news conference this morning, TVA officials said it will take four to six weeks to clean up.

Officials also said initial water sampling downstream of the spill showed water in the Emory River downstream from the spill was within state environmental standards. They said water sampling was continuing.

See Saturday’s Times Free Press for complete coverage.