TVA Kingston Fossil Plant (coal fly ash pond)-Dec. 22, 2008: Ash dike ruptured at a waste containment area in the Tennessee Valley Authority’s Kingston Fossil Plant in Roane County, Tenn., releasing 1.1 billion gallons of toxic coal fly ash slurry, the largest such release in U.S. history, which spilled into the Emory River. Estimated costs to clean are $525 million-$825 million, as cleanup is ongoing. (Source: TVA, EPA)
The explosion and fire at a natural gas rig off the Louisiana coast raise new questions about the role of blowout preventers and overall safety of drilling operations in the Gulf.
Arch Coal and the EPA faced off in federal appeals court over agency's revoked permit for West Virginia coal mine. The case has several industries worried that the EPA could take back their permits retroactively under the Clean Water Act.
Two former BP executives testified Wednesday about the effect of cost-cutting measures on BP's drilling operations before the 2010 oil well blowout in the Gulf of Mexico. It marks the third day of the Gulf oil spill trial designed to figure out how much BP and other companies are to blame for the spill.