Superfund Site Profile
The California Gulch site consists of about 18 square miles in Lake County, Colorado. The area includes the city of Leadville, parts of the Leadville Historic Mining District and a section of the Arkansas River from the confluence of California Gulch downstream to the confluence of Two-Bit Gulch. Former mining operations contributed to metals contamination in surface water, groundwater, soil and sediment. Cleanup is complete at several areas of the site. Operation and maintenance activities at these areas are ongoing. Cleanup of the remaining areas is ongoing.
TOPICS IN FOCUS
EPA and the Colorado Department of Public Health and Environment announce the deletion of operable units (OUs) 1 (Yak Tunnel), and OU3 (Denver and Rio Grande Railroad Slag Piles, Railroad Easement, Railroad Yard, and the Mineral Belt Trail) within the California Gulch Superfund site from the National Priorities List (NPL).
The public comment period on the proposed NPL partial deletions concluded on March 10, 2016. After consideration of public comments, EPA has determined that no further action is needed within OUs 1 and 3.
EPA has established a docket for this action under Docket Identification No. EPA-HQ-SFUND-1983-0002. Publicly available docket materials are listed on the www.regulations.gov website. For hard copies please contact one of the Public Information Repositories.