From The Denver Post (Kirk Mitchell):
The portable plant will treat 550 gallons per minute of water still discharging from the mine in southwest Colorado, according to an Environmental Protection Agency news release. The system, intended to meet treatment needs through the coming winter, will replace temporary settling ponds constructed by the EPA in August…
The portable system is necessary because winter temperatures at the mine’s elevation of 10,500 feet north of Silverton can drop to 20 degrees below zero.
EPA’s contractor, ER LLC, awarded a subcontract on Sept. 22 to Alexco Environmental Group Inc. to do the work.
The treatment system will neutralize the mine discharge and remove solids and metals, the news release says. The EPA continues to evaluate data to determine the impact of the Gold King Mine on water quality.