EPA Superfund Site

EAGLE MINE

CO | EPA ID COD081961518

About this site’s exposure pathways: As of September 2024, the Eagle Mine Superfund site is considered "Current Human Exposure Not Under Control" (HENC). The Belden and Rock Creek areas of the Site contain waste material contaminated with heavy metals from historic mining operations as well as metals contaminated groundwater. Although these areas are private property, the Site has a history of trespassing so it can be reasonably anticipated that exposures are occurring. The Operable Unit 1 (OU1) Record of Decision Amendment issued in 2017 selected institutional controls as part of the OU1 remedy. This exposure pathway is considered unacceptable based on EPA risk-based criteria because of high concentrations of heavy metals, specifically arsenic and lead, in waste rock piles and groundwater in Belden and Rock Creek.

To date, the planned activities to address this pathway are to coordinate with the State of Colorado and the property owner to implement a restrictive notice via the Colorado Environmental Covenant Statute to restrict access to the Belden and Rock Creek areas of the Site. EPA anticipates that human exposure will be under control by June 30, 2025.