About St. Joseph Lead Company Smelter Complex Herculaneum Missouri

For over 100 years, the St. Joseph Lead Company’s smelter in Herculaneum, Missouri processed raw ore into refined lead, employing hundreds of workers across dozens of industrial trades. The company was founded in the mid-nineteenth century as the largest lead producer in the United States and was headquartered in New York, operating extensive mining across southeastern Missouri’s Old Lead Belt — Bonne Terre, Flat River, Desloge. The smelter was situated in Jefferson County, approximately 25 miles south of St. Louis, began operations in the early twentieth century, and operated continuously as the last remaining primary lead smelter in the United States until closure in 2013.

Herculaneum was a primary lead smelter — raw galena ore in, refined lead metal out, through extreme heat and aggressive chemistry. The complex included:

  • Sintering plants — partial oxidation of ore
  • Blast furnaces — operating above 2,000°F
  • Drossing kettles and refining furnaces — impurity removal from molten lead
  • Casting operations — refined lead poured into pigs and ingots
  • Acid plants — sulfur dioxide byproducts converted to sulfuric acid
  • Boiler and steam systems — energy distributed throughout the complex
  • Maintenance shops and fabrication areas

Every one of those operations ran on extreme heat. Protecting equipment and workers from that heat created massive, sustained demand for thermal insulation, gaskets, refractory materials, and fireproofing — and for decades, those products contained asbestos. The facility underwent several ownership changes: in 1971 it merged with Amax Inc. to form St. Joe Minerals Corporation, transferred to Fluor Corporation in the mid-1980s, was acquired by Doe Run Company in 1994, and finally closed in 2013.

General Equipment at St. Joseph Lead Company Smelter Complex Herculaneum Missouri

The equipment below represents the systems and infrastructure documented or typically present at this facility during the era when asbestos-containing materials were specified in industrial construction. This is general facility-equipment reference — not a legal attribution of any specific product, manufacturer, or exposure event to this facility. Material-category and manufacturer information is addressed in the AsbestosIndex Product Crosswalk linked under the records table below.

Industrial Boilers View crosswalk › Process Piping View crosswalk › Pipe Insulation View crosswalk › Block Insulation View crosswalk › Valves View crosswalk › Gaskets View crosswalk › Pumps View crosswalk › Heat Exchangers View crosswalk › Cooling Equipment View crosswalk ›

Documented Asbestos Evidence

The records below are verified, state-documented asbestos removals at this facility. Each entry represents a regulated abatement project where the Missouri Department of Natural Resources (Missouri DNR) was notified under federal NESHAP rules, the work was logged, and the asbestos-containing material was confirmed and removed under regulated conditions. These are not allegations or estimates — they are paper records tying documented asbestos-containing material to this specific site.

No Missouri DNR NESHAP abatement notifications have been identified for this facility in current public records. Per the framing above, absence of state-agency documentation should not be read as absence of asbestos — only as absence of a formal, regulated abatement event meeting reporting thresholds. Workers who recall encountering pipe insulation, block insulation, gaskets, or other asbestos-era construction materials at this facility may still have viable claims regardless of whether a state record exists.

Material Categories in Documented Records

The materials documented above (and similar asbestos-containing materials commonly encountered in records of this type) appear in the AsbestosIndex catalog with historical manufacturer and trust-fund information. Click a category to view manufacturers historically associated with that material:

Thermal System Insulation View crosswalk › Asbestos-Cement Board View crosswalk › Pipe Insulation View crosswalk › Roofing & Flashing View crosswalk › Spray Fireproofing View crosswalk › Floor Tile & Mastic View crosswalk › Ceiling Tile View crosswalk › Gaskets & Packing View crosswalk ›

Who May Have Been Exposed at St. Joseph Lead Company Smelter Complex Herculaneum Missouri

At peak operation, Herculaneum employed hundreds of direct workers plus contractors and skilled tradespeople. The workers with the heaviest asbestos exposure — those who mixed, applied, cut, and disturbed asbestos products daily — belonged to Heat and Frost Insulators Local 1 (St. Louis), Plumbers and Pipefitters UA Local 562 (St. Louis), and Boilermakers Local 27 (St. Louis). The full workforce included:

  • Insulators — Heat and Frost Insulators Local 1 members applying and removing pipe insulation, block insulation, and boiler coverings
  • Pipefitters — UA Local 562 members installing and maintaining steam and process piping covered with asbestos products
  • Boilermakers — fabricating and repairing boiler systems lined with asbestos insulation and refractory materials
  • Electricians — installing wiring and equipment alongside asbestos-containing thermal insulation
  • Millwrights — maintaining machinery requiring asbestos-containing gaskets and packing
  • Maintenance workers and laborers — general repair work involving constant asbestos disturbance
  • Bricklayers and refractory workers — mixing and installing asbestos-containing refractory cements
  • Furnace workers — laboring in areas where asbestos insulation and refractory materials generated sustained airborne fiber exposure

Workers in proximity to any of these operations may have been exposed to asbestos fibers released by others’ work.

Critical Filing Deadline & Next Steps

Missouri law gives mesothelioma and asbestos-disease claimants 5 years from the date of medical diagnosis to file a personal-injury lawsuit (Mo. Rev. Stat. § 516.120). For wrongful-death claims after an asbestos-related death, the filing window is 3 years from the date of death (Mo. Rev. Stat. § 537.100). The two deadlines run on separate tracks — preserving one does not extend the other.

The personal-injury clock runs from diagnosis, not from exposure. Mesothelioma latency is typically 20 to 50 years, so workers exposed in the 1950s–1980s are being diagnosed today.

Practical first steps

  1. Document what you remember. Pay stubs, W-2s, union cards, photographs, coworker names, and dates of employment. The WorkChain widget on this page can save a copy you can email yourself.
  2. Preserve medical records. Pathology reports, biopsy results, imaging, and pulmonary-function tests are central to both civil claims and trust-fund filings.
  3. Identify household members. Spouses who laundered work clothing and children of plant workers are eligible for secondary-exposure claims when diagnosed with an asbestos-related disease.
  4. Speak with an asbestos attorney with Missouri experience. The first conversation is free and confidential. Asbestos trust-fund claims and civil claims run on different tracks — both can be pursued in parallel.

Asbestos-Related Diseases

Asbestos fiber exposure can cause several specific diseases that typically appear decades after the original exposure. The latency period — the gap between exposure and diagnosis — usually runs 20 to 50 years. That's why workers exposed in the 1960s, 1970s, and 1980s are receiving diagnoses today.

Mesothelioma

A rare, aggressive cancer that affects the lining of the lungs (pleural mesothelioma), abdomen (peritoneal), or heart (pericardial). Mesothelioma is almost exclusively caused by asbestos exposure, which is why a mesothelioma diagnosis often points directly to historical workplace exposure. Average latency from first exposure to diagnosis is 30-50 years.

Asbestosis

A chronic, non-cancerous scarring of lung tissue caused by inhaled asbestos fibers. Asbestosis causes progressive shortness of breath, persistent cough, and reduced lung function. It does not improve with treatment, and it is a recognized basis for compensation under most trust schedules and civil claims.

Lung Cancer

Asbestos exposure significantly increases the risk of lung cancer, particularly when combined with a history of smoking. Asbestos-related lung cancer is compensable under the same trust schedules and civil claim avenues as mesothelioma.

Other Recognized Diseases

Pleural plaques, pleural thickening, laryngeal cancer, ovarian cancer, and certain gastrointestinal cancers are also recognized as asbestos-related under various trust schedules and case-law authorities, though eligibility and proof requirements vary by claim type.

If you have any of these diagnoses and you worked at this facility, lived with someone who did, or were exposed in any documented capacity, you may have a claim worth pursuing. Speak with an attorney before assuming you don't qualify.

Data Sources

Information about facility equipment, industrial materials, and occupational records referenced on this page is drawn from publicly available sources where applicable, including:

If specific equipment or product claims in this article are sourced from a non-public database, the source is identified parenthetically within the text above.