2015 Gold King Mine waste water spill

The 2015 Gold King Mine waste water spill was a 2015 environmental disaster at the Gold King Mine near Silverton, Colorado. On August 5, 2015, employees of the United States Environmental Protection Agency (EPA), when trying to add a tap to the tailing pond for the mine, accidentally destroyed the dam holding the pond back, spilling three million gallons of toxic mine waste water and tailings, including heavy metals such as cadmium and lead, and other toxins, such as arsenic,^[2] into Cement Creek, a tributary of the Animas River in Colorado.^[3]

• http://en.wikipedia.org/wiki/2015 Gold King Mine waste water spill