A dam ruptured this morning at the TVA coal fired power plant in northeast Alabama—the second spill at a coal-fired power plant in less than a month. At 6am, a waste pond at the Widows Creek facility burst. TVA claims the spill is contained, and they are currently investigating the cause.

Just 17 days ago, a TVA coal ash pond spilled nearly one billion gallons of toxic ash into the Emory River, the drinking water supply for Chattanooga and millions of Tennesseeans.

The Widows Creek spill leaked calcium sulfate and residues from scrubbers into Widows Creek, a tributary of the Tennessee River.