EPA lacked view of pressure buildup at Colorado mine, internal report says
A U.S. Environmental Protection Agency team working to address seepage at an abandoned Colorado gold mine underestimated water pressure at the site before triggering a blowout that sent toxic waste into rivers, according to an internal report released by the agency on Wednesday. The Aug. 5 blowout at the Gold King Mine located on a creek outside Silverton in southwest Colorado sent more than 3 million gallons (11,360 cubic meters)