Copperopolis Asbestos Mine The Copperopolis Asbestos Mine in Calaveras County, California extracted chrysotile asbestos from serpentine rock deposits in the Sierra Nevada foothills. The mine supplied raw fiber to insulation and construction material manufacturers during the mid-20th century.
Last verified: 2026-03-09Asbestos mining in the Copperopolis area grew out of the region's broader mineral extraction history, which included copper and gold. Chrysotile deposits in the serpentine belt of the western Sierra foothills were commercially mined from the 1940s through the late 1970s. Operations ceased as federal regulations and declining demand made continued extraction uneconomical. Remnant tailings and waste rock remain at the site.
Open-pit extraction and dry-processing methods created heavy dust exposure for workers. Drilling, blasting, and crushing serpentine rock released chrysotile fibers into the air. Workers in the bagging and shipping areas faced some of the highest concentrations. Waste rock used for local road surfacing extended exposure to the surrounding community.
The following job categories at Copperopolis Asbestos Mine had the highest risk of asbestos exposure:
Workers from the Copperopolis mine have been diagnosed with mesothelioma, asbestosis, and lung cancer. The dry processing methods used during peak production generated particularly high fiber counts. Long latency periods mean new diagnoses continue to appear among former workers.
Health information is based on established medical research on asbestos exposure. Asbestos is classified as a known human carcinogen by the National Cancer Institute, the Agency for Toxic Substances and Disease Registry, and the U.S. Environmental Protection Agency. Consult a physician for medical advice specific to your situation.
Workers exposed to asbestos at Copperopolis Asbestos Mine may be entitled to compensation through asbestos trust funds, personal injury lawsuits, or veterans benefits. Mesothelioma patients and their families have recovered billions in compensation from companies that manufactured or used asbestos products.
Find Out If You QualifyWorkers who were employed at Copperopolis Asbestos Mine between 1950s–1970s may have been exposed to asbestos-containing materials. If you've been diagnosed with mesothelioma, lung cancer, or asbestosis, you may have legal options including trust fund claims and lawsuits.
If you were exposed to asbestos at Copperopolis Asbestos Mine and have been diagnosed with mesothelioma, these specialized treatment centers in California may be able to help.
San Francisco, CA
Comprehensive Cancer Center
Los Angeles, CA
Comprehensive Cancer Center
Stanford, CA
Comprehensive Cancer Center
Los Angeles, CA
Los Angeles, CA
Yes. Copperopolis sits in the Sierra Nevada serpentine belt, which contains naturally occurring chrysotile asbestos. Any ground disturbance — including construction, grading, or off-road activity — can release fibers into the air.
Workers exposed to chrysotile asbestos at the mine face increased risk of mesothelioma, lung cancer, and asbestosis. These diseases typically develop 20 to 50 years after initial exposure.
Liability may rest with former mine operators, property owners, and companies that purchased raw asbestos from the site. An asbestos attorney can investigate the chain of ownership and identify responsible parties.
No. Missing paperwork is normal after this long, and it is not what decides a claim. A Social Security earnings statement lists every employer you had, by year, and can usually be requested directly. Union records, W-2s and a DD-214 for military service do similar work. Coworkers who were there can also confirm conditions. What matters most is what you remember, written down in your own words.
Yes. A wrongful death claim can be brought by the estate or eligible family members, and it is a separate route from a claim the patient would have brought themselves. It also runs on a different clock: the deadline generally starts at the date of death rather than the date of diagnosis, which means families are sometimes still in time when they assume they are not. Deadlines are set by each state, so confirm the one that applies to yours.
Possibly. Asbestos fibres travelled home on work clothes, in hair and in vehicles, and household members were exposed while washing laundry or greeting someone at the end of a shift. This is called secondhand or take-home exposure and it is a recognised route to a claim in its own right, not an exception. If you are documenting a family member's work history, write down your own contact with their work clothing as well.
You do not need a lawyer, a diagnosis, or a decision to do this. You need a piece of paper. Memory is the part of a claim nobody else can reconstruct for you, and it is the part that fades.
If you are doing this for a relative who has died, write down what you remember too, including work clothes brought home to be washed. Household exposure is a real claim, not an edge case.
That is usually enough to work out which claims are open to you — trust funds, a lawsuit, or VA benefits if the exposure happened in service. You do not need records, dates you are certain of, or the name of a product. If you are asking on behalf of someone who has died, a family member can file and the deadline runs differently. No cost, no obligation, and no pressure to decide anything today.
Or call us 24/7: 1-800-400-1805
Sources:
