The US Environmental Protection Agency's contractors were working in the historic Gold King/ Red & Bonita Mines causing a 3 million gallon spill of contaminated waste-water.
Pollution, In The News
Links below have photos & maps; along with reports critical of the EPA's handling of the event.
The spill was possibly caused by the release of an ice plug.
Links: www.vox.com, arizonadailyindependent.com, www.mining.com