CHATTANOOGA, TN. (Times Free Press) -- Although TVA has excavated more than 1.6 million cubic yards of coal ash from the Emory and Clinch river area, the utility and EPA are looking at ways to handle another 500,000 cubic yards of ash that remain underwater in the Emory, Clinch and Tennessee rivers.

The alternatives being considered to deal with the residual ash from the 2008 Kingston ash spill will cost TVA a minimum of $10 million and as much as $179 million, according to an engineering evaluation and cost analysis report released Friday by the U.S. Environmental Protection Agency.

That minimum -- $10 million -- would be the cost for no additional removal. Instead, that money would be spent monitoring the underwater ash and the environment nearby for the next 30 years.

Read more on the story from our news partners at the Chattanooga Times Free Press.