The Tennessee Dept. of Environment and Conservation on June 15 assessed a $11.5-million fine against the Tennessee Valley Authority in connection with the December 2008 spill that released 5.4 million cu yds of coal ash from TVA’s Kingston, Tenn., coal-fired plant onto surrounding land and into the Emory River. The fine is the first against the federal power-marketing agency since the accident, but TVA will receive a $3-million credit for remediation already performed. Cleanup could cost $1.2 billion. Under the state fine, TVA will perform supplemental environmental projects totaling $2 million. The remainder will be earmarked for the state’s solid-waste
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.