Superfund Site Profile

EPA is conducting the fifth five-year review of the remedial actions performed under the Superfund program for the California Gulch Superfund site. The purpose of the five-year review is to evaluate the implementation and performance of a remedy to determine if it is or will be protective of human health and the environment.

We invite community participation in the five-year review process. Community members are always encouraged to contact EPA staff with any information that may help us make our determination regarding the protectiveness and effectiveness of the remedies at the site.

Read the public notice »

Questions? Contact:

Chris Wardell (
Community Involvement Coordinator
U.S. EPA, Region 8
(800) 227-8917, ext. 312-6062

Warren Smith (
Community Involvement Manager
Colorado Department of Public Health and Environment
(303) 692-3373


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.