The Tennessee Valley Authority (TVA) was in charge of the unlined, Kingston, Tennessee coal ash storage facility when it broke in December 2008 and released more than 5 million cubic yards of coal ash across a couple hundred acres. Cleanup is expected to cost well more than $600 million. Currently, TVA is construction a gypsum storage pond, but the plans call for only a clay liner. Local officials are pushing for a geosynthetic lining system.

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