Barrier put in mine that sent toxic water into 3 states
September 21, 2017
DENVER (AP) — The U.S. Environmental Protection Agency is installing a barrier and valve inside an inactive Colorado mine to prevent another surge of wastewater like a 2015 blowout that contaminated rivers in three states.
The 12-inch (30-centimeter) valve will regulate wastewater pouring from the Gold King Mine in the San Juan Mountains of southwestern Colorado, where the EPA inadvertently triggered a wastewater spill while excavating at the mine entrance in August 2015.
That spill released 3 million gallons (11 million liters) of wastewater containing aluminum, iron and other heavy metals an...
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