Insurers may see little or no exposure to the tens of millions of dollars in cleanup costs the Tennessee Valley Authority faces after a retention wall break spilled coal ash over more than 300 acres, according to a government spokesman.

On Dec. 22, a retention wall holding tons of coal ash, the waste product from a coal-burning electricity generating plant near Kingston, Tenn., broke, spilling 5.4 million cubic yards of fly ash over the countryside and depositing some of the waste into the Emory and Clinch Rivers.

No one was hurt from the release, but approximately 15 residences were affected by the spill and at least three homes were made uninhabitable.

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