EPA Superfund Program: ANACONDA ALUMINUM CO COLUMBIA FALLS REDUCTION PLANT, COLUMBIA FALLS, MT

Superfund Site Profile

The Anaconda Aluminum Co Columbia Falls Reduction Plant, also known as Columbia Falls Aluminum Company (CFAC) Plant, is located two miles northeast of Columbia Falls in Flathead County, Montana. It covers approximately 960 acres north of the Flathead River, a fishery that includes the federally designated, threatened bull trout and the federally sensitive westslope cutthroat trout. EPA’s initial site evaluation indicates that groundwater and surface water at the site contain various contaminants of concern, including cyanide, fluoride and various metals.

The CFAC plant operated between 1955 and 2009 and created significant quantities of spent potliner material, a federally listed hazardous waste, as a byproduct of the aluminum smelting process. Spent potliner material is known to contain cyanide compounds that can leach into groundwater.

In 1985, CFAC bought the plant from Atlantic Richfield Company, which had acquired the facility from the plant’s original owner, Anaconda Company, in 1977.

TOPICS IN FOCUS

On September 9, 2016, EPA added the CFAC site to the National Priorities List (NPL) making it eligible for additional study and cleanup resources under EPA’s Superfund program. The following documents support this listing; additional documents are available at regulations.gov.


SITE STATUS

Construction
Complete?
No
Human Exposure
Status

Insufficient Data
Contaminated Ground
Water Status
Insufficient Data
Site-Wide Ready for
Anticipated Use?
No