Tenn. Ash Spill Cleanup Slow; Cause Still Unknown

More dredges and larger dredges are on the way, Ray said, noting the progress that's been made in six months.

She pointed to the restoration of a cove known as the "Church Slough." Six months ago it was buried in ash.

"All of the ash is gone. The fauna is back. The birds are back in the spring-fed water. It is done," Ray said. "That is kind of our hope for how the rest of it will look when we are finished."