About Monsanto Queeny
Facility Overview and History
The Monsanto Queeny Plant — named after Edgar Monsanto Queeny, son of company founder John Francis Queeny — operated as one of the largest industrial chemical manufacturing complexes in the American Midwest. Located in St. Louis, Missouri, it served as a centerpiece of Monsanto Company’s domestic manufacturing operations throughout most of the twentieth century.
Monsanto was founded in St. Louis in 1901, initially producing saccharin before expanding into industrial and agricultural chemicals, plastics, and synthetic materials. By the 1930s and 1940s, the Queeny Plant had grown into a large-scale complex engaged in chemical production requiring:
- Enormous amounts of heat, pressure, and steam
- Piping infrastructure spanning miles of process lines
- Large boilers and furnace systems
- Thousands of workers across multiple trades and job classifications
The plant reportedly employed Heat and Frost Insulators (Local 1), pipefitters, boilermakers, electricians, maintenance mechanics, outside contractors, and chemical operators across several decades of peak operation.
Timeline of Operations and Asbestos-Containing Material Use
The period from approximately 1939 through the mid-1980s marks the era during which asbestos-containing materials were most extensively incorporated into the Queeny Plant’s construction, maintenance, and operational infrastructure.
| Period | Reported Activity |
|---|---|
| 1939–1945 | Major wartime construction and plant expansion; steam systems and boilers reportedly insulated with asbestos-containing pipe covering and block insulation |
| 1945–1960 | Post-war production expansion; continued installation of asbestos-containing materials in new process units, reactors, and piping systems |
| 1960–1972 | Ongoing installation and removal of pipe covering, gaskets, and refractory materials; spray fireproofing of structural steel allegedly used asbestos-containing formulations |
| 1972–1979 | OSHA asbestos standards enacted; new installation of asbestos-containing materials reportedly declined, but legacy materials remained throughout the plant |
| 1979–1985 | Maintenance, repair, and decommissioning work may have continued to disturb legacy asbestos-containing materials without adequate exposure controls |
Federal regulation tightened through the 1970s — OSHA’s 1972 and 1976 permissible exposure limit standards and subsequent EPA actions drove down new asbestos installation at major industrial facilities. Legacy asbestos-containing materials already in place — pipe insulation, equipment coverings, gaskets, and structural components — are alleged to have remained throughout the 1980s, continuing to expose maintenance workers, contractors, and others who disturbed those materials during repairs, shutdowns, and renovations.
General Equipment at Monsanto Queeny
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.
Documented Asbestos Evidence — Missouri
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:
Missouri — 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
- 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.
- Preserve medical records. Pathology reports, biopsy results, imaging, and pulmonary-function tests are central to both civil claims and trust-fund filings.
- 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.
- 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 — Missouri
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 a claim 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 — Missouri
Information about facility equipment, industrial materials, and occupational records referenced on this page is drawn from publicly available sources where applicable, including:
- EPA ECHO Facility Compliance Database — enforcement and compliance records for industrial facilities
- OSHA Establishment Search — federal workplace inspection history
- EIA Form 860 Plant Data — power-plant equipment and ownership records (where applicable)
- Missouri Department of Natural Resources (MDNR) NESHAP asbestos abatement notification records
- Published asbestos trial and trust fund records (publicly filed court documents)
- AsbestosIndex Product & Manufacturer Crosswalk — historical asbestos-containing product schedules linked to manufacturers
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.