"An internal investigation reveals regulators had wrongly assessed the water pressure built up inside the Gold King mine before releasing toxic wastewater"

"BILLINGS, Montana -- An internal government investigation has found that federal and state regulators underestimated the potential for a blowout from a Colorado mine, documents released Wednesday show.

Investigators concluded the federal Environmental Protection Agency and state regulators underestimated how much water pressure had built up inside the inactive mine before a government cleanup crew triggered the release, according to the documents released by the EPA.

The agency previously offered only impartial information on events leading to the spill."

Matthew Brown reports for the Associated Press August 26, 2015. [2]

SEE ALSO:

"EPA: Waste Pressure Evidently Never Checked Before Colorado Mine Spill" (Denver Post) [3]