Superfund Site: LINCOLN PARK

Superfund Site Profile

EPA, in cooperation with the Colorado Department of Public Health and Environment, is conducting the third five-year review for Operable Unit 2 (residential soils). The purpose of the review is to make sure that the cleanup actions completed to date are adequately protecting human health and the environment. Community interviews were held in March 2017 and the final report is anticipated in the fall of 2017.


The Lincoln Park site is located south of Cañon City in Fremont County, Colorado. The site includes the Cotter Corporation’s (Cotter) 2,600-acre uranium mill and areas of mill-associated contamination, including the Lincoln Park community near the mill. Cotter started producing yellowcake at the Cañon City mill in August 1958. Yellowcake is the solid form of mixed uranium oxide, which is produced from uranium ore in the uranium milling process. In addition to producing yellowcake, the mill produced vanadium and molybdenum as byproducts. Historical mill operations and disposal practices released radioactive and metal contamination into the environment. The mill was originally licensed by the Atomic Energy Commission, but the authority for licensing was transferred to the Colorado Department of Public Health and Environment (CDPHE) in 1968 when Colorado became an Agreement State. Investigation and cleanup activities at the site are ongoing under a 2014 agreement to conduct a Remedial Investigation/Feasibility Study (RI/FS).