TransAlta Centralia Mine has 8 groundwater monitoring wells, 7 of which have been polluted above federal advisory levels based on samples collected between December 13, 2010 and October 05, 2017. Groundwater at this site contains unsafe levels of sulfate, manganese, cobalt, lithium, arsenic and nitrite.Site description
TransAlta Centralia Mine was an open-pit coal mine owned by the Canadian-based TransAlta Corporation. The coal mine is located approximately 5 miles northeast of Centralia, Washington. The mine’s average annual production between 1997 and 2001 was 4.4 million short tons. On November 27, 2006, TransAlta stopped operations at the mine, citing increasing operation costs. The company now receives coal from the Powder River Basin in Wyoming to supply its coal burning power plant with the capacity of 1340 MW. The residual ash waste is disposed of in the Limited Purpose Landfill, which has an area of 18 acres and is regulated under the CCR rule. There is also a surface impound directly south of the disposal area to manage leachate from the landfill. You can find the industry-reported data here. For more information on the TransAlta Centralia Mine, see EIP’s 2019 National Coal Ash Report.