Sullivan, Franklin County, Missouri—

Your Exposure May Have Legal Value

For decades, Pea Ridge Iron Mine in Sullivan, Franklin County, Missouri operated as one of the largest iron ore mining operations in the United States. Workers who spent careers underground and in the surface processing facilities took pride in their work and their contribution to American industry. What they did not know—and what Bethlehem Steel Corporation, Johns-Manville, Owens Corning, Armstrong World Industries, insulating boardCorporation, and Eagle-Picher Industries are alleged to have deliberately concealed—is that the insulation, gaskets, pipe coverings, and refractory materials surrounding them daily contained asbestos, one of the most lethal substances ever introduced into an industrial workplace.

Former Pea Ridge workers, their spouses, and their children are now being diagnosed with mesothelioma, asbestosis, and asbestos-related lung cancer. If you or a family member worked at Pea Ridge Iron Mine at any point from the 1960s through the 1990s, you may have been exposed to asbestos-containing products—including calcium silicate pipe covering, pipe covering materials, spray fireproofing, and pipe and block insulation products—without knowing it, and you may hold legal rights worth substantial compensation.

An experienced asbestos attorney can evaluate your exposure history and explain what compensation may be available through. —

What Was Pea Ridge Iron Mine? ### Facility History and Operations

Bethlehem Steel Corporation developed Pea Ridge Iron Mine in the late 1950s and early 1960s following discovery of a massive iron ore body in Missouri’s Ozark region. Construction began around 1960. Commercial production started in 1963. Pea Ridge was not a simple extraction site. It was a fully integrated iron ore mining and processing complex that included:

Underground mine workings extending thousands of feet below the surface
Shaft hoisting infrastructure incorporating asbestos-containing friction materials
Surface crushing and beneficiation facilities with asbestos-lined equipment
Grinding mills surrounded by calcium silicate insulation and pipe covering insulation
Magnetic separation equipment with asbestos-containing gaskets manufactured by gaskets and packingSealing Technologies
Pelletizing facilities with refractory linings alleged to contain asbestos
Boiler plant and power generation systems with Combustion Engineering refractory materials
Piping networks for slurry, water, and compressed air insulated with pipe covering and insulation and Owens Corning products
Maintenance shops and fabrication areas
Heat exchangers and steam distribution systems lined with Armstrong World Industries asbestos products

This scope of industrial infrastructure meant Pea Ridge functioned like a heavy industrial plant—with all the thermal insulation, mechanical systems, and process piping such facilities require. Where there were pipes, boilers, kilns, and high-temperature equipment in mid-twentieth century American industry, there was almost invariably asbestos-containing insulation manufactured by Johns-Manville, Owens Corning, Armstrong World Industries, insulating boardCorporation, and their competitors.

Ownership and Corporate Responsibility

Bethlehem Steel Corporation originally developed and operated Pea Ridge Iron Mine. Bethlehem Steel appears in asbestos litigation nationwide for its direct use of asbestos-containing materials at its facilities and its alleged failure to warn workers of known hazards. The mine subsequently passed through several ownership structures over its operating life, potentially including successor entities. Each operator bears responsibility for the conditions workers faced during that ownership period. Missouri corporate successor liability doctrines extend responsibility across corporate transitions. Grace block insulation | | Mechanical durability | Gaskets, packing materials, and rope maintained seals under extreme pressure and temperature cycling | gaskets and packingSealing Technologies gaskets, Crane Co. packing materials | | Friction control | Brake linings and friction materials on mine hoisting equipment, conveyor systems, and mobile equipment | pipe and block insulation brake products, Clark Equipment friction materials | | Electrical insulation | Resisted heat and electrical conductivity in wiring and electrical equipment throughout the facility | General Electric asbestos-insulated cable, Westinghouse switchgear components |

Asbestos Use in Mining and Mineral Processing

The mining and mineral processing industry ranked among the heaviest per-capita users of asbestos-containing insulation products in American industry during the 1960s, 1970s, and 1980s. Pea Ridge, as a major industrial operation that included processing, pelletizing, and boiler operations, reportedly incorporated asbestos-containing products from Johns-Manville, Owens Corning, Armstrong World Industries, Celotex, Eagle-Picher, Combustion Engineering, and other established manufacturers throughout these decades.

When and How Asbestos Exposure Occurred at Pea Ridge

Construction Phase Exposure (Approximately 1960–1963)

Construction of Pea Ridge’s surface facilities was one of the highest-risk periods for asbestos exposure. During this phase, members of Heat and Frost Insulators Local 1 (St. Louis, MO) and Plumbers and Pipefitters UA Local 562 (St. Louis, MO), along with boilermakers and electricians, installed:

pipe covering and insulation asbestos pipe insulation on steam and process piping systems
pipe covering insulation on high-temperature equipment and boiler surfaces
Owens Corning Aircell insulation on refrigeration and cooling systems
Armstrong World Industries spray fireproofing on structural steel and mechanical systems
insulating boardasbestos-containing board and block insulation on equipment surfaces
Eagle-Picher refractory materials in kiln and furnace linings
gaskets and packingSealing Technologies gaskets and packing in flanged connections
Crane Co. asbestos rope packing in boiler and pressure vessel applications

Cutting, fitting, mixing, and applying these materials in enclosed spaces generated extraordinarily high concentrations of airborne asbestos fibers. Construction-phase asbestos application using Johns-Manville, Owens Corning, and Armstrong products is documented across virtually every major industrial facility built in the United States between 1940 and 1975. ### Operational Phase Exposure (1963 Through the 1980s and Beyond)

Operational exposure at Pea Ridge took multiple forms:

Maintenance and Repair Work

Every repair or replacement of pipe covering and insulation pipe insulation, pipe covering equipment insulation, or Armstrong spray fireproofing coatings disturbed existing asbestos-containing materials
Workers removing Owens Corning Aircell insulation and gaskets and packing inhaled fibers released during the work
Bystanders and supervisors in the area inhaled secondary fibers from these operations

Routine Insulation Removal and Replacement

pipe covering and insulation, pipe covering, and Owens Corning asbestos pipe insulation degrades over time, becoming friable and releasing fibers into the air
Periodic replacement required removal of old, deteriorating asbestos material—some of the most dangerous work in any industrial setting
Replacement insulation continued to contain Johns-Manville, Owens Corning, Armstrong, and insulating boardproducts well into the late 1970s and early 1980s

Boiler and Heat Exchanger Maintenance

Boiler tube replacement required removal of asbestos rope packing manufactured by Crane Co. and A.W. Chesterton Company
Refractory patching and replacement used materials from Combustion Engineering, refractory productsRefractories, and A.P. Green Industries
These activities are among the most historically asbestos-intensive maintenance operations at any facility of this size

Pelletizing Operations

Iron ore pelletizing fires ore in rotary kilns and high-temperature equipment
Refractory linings in these kilns allegedly contained asbestos from Eagle-Picher and other manufacturers
Insulation on associated equipment and piping reportedly contained pipe covering and insulation, pipe covering, and Owens Corning products

General Facility Dust

Where asbestos-containing materials from Johns-Manville, Owens Corning, Armstrong, Celotex, and Eagle-Picher were widespread and deteriorating, ambient asbestos fiber levels throughout the facility were elevated
Workers who never directly handled asbestos-containing materials may have been exposed by inhaling fibers from degrading calcium silicate insulation insulation, pipe covering coverings, and other products throughout the workday

Who Was at Risk? Trades and Job Classifications with Highest Exposure

Insulators (Heat and Frost Insulators Local 1 and Local 27)

Insulators—particularly members of Heat and Frost Insulators Local 1 (St. Louis, MO) and Heat and Frost Insulators Local 27 (Kansas City, MO)—faced some of the highest asbestos exposures of any industrial trade. At Pea Ridge, insulators:

Applied and maintained pipe covering and insulation thermal insulation on steam and process piping
Installed pipe covering insulation on boilers and steam generation equipment
Covered kilns, dryers, and furnaces with asbestos-containing materials from multiple manufacturers
Insulated heat exchangers, valves, flanges, and fittings with Owens Corning Aircell and Armstrong products
Applied asbestos-containing finishing cement and asbestos-impregnated paper to complete insulation installations

Asbestos-containing insulation products used at Pea Ridge and comparable industrial facilities were manufactured by:

Johns-Manville — calcium silicate pipe covering, block insulation, asbestos-containing finishing cement
Owens Corning — Aircell insulation, fiberglass and asbestos composite pipe insulation
pipe covering/Keasbey & Mattison — high-temperature block and pipe insulation
Armstrong World Industries — spray fireproofing, block insulation
insulating boardCorporation — asbestos-containing insulation board and block products
Eagle-Picher Industries — refractory and insulation products for high-temperature applications

Pipefitters and Plumbers (UA Local 562, St

Litigation Landscape

Workers at industrial mining and processing facilities like Pea Ridge have historically been exposed to asbestos-containing insulation, refractory materials, and gasket products. Litigation arising from such exposures has identified several manufacturers as responsible parties, including Johns-Manville, Combustion Engineering, Babcock & Wilcox, Crane Co., and W.R. Grace—all of which supplied insulation and thermal protection products to industrial operations during the mid-to-late twentieth century. Many of these manufacturers have established bankruptcy trust funds to compensate injured workers and their families. The pipe covering and insulationAsbestos Personal Injury Settlement Trust, the Combustion Engineering Asbestos Personal Injury Settlement Trust, the Babcock & Wilcox Settlement Trust, the Crane Co. Asbestos Settlement Trust, and the Grace Settlement Trust represent significant sources of recovery for qualifying claimants. Each trust maintains its own proof-of-claim procedures and eligibility criteria based on documented exposure. Publicly filed litigation arising from industrial mining and mineral processing facilities demonstrates a consistent pattern of asbestos disease claims, with mesothelioma and lung cancer among the most common diagnoses. These cases typically proceed through Missouri state courts or federal multidistrict litigation frameworks, depending on the scope and number of claimants involved. Workers who suspect they were exposed to asbestos at Pea Ridge Iron Mine should act promptly to protect their legal rights. An experienced Missouri mesothelioma attorney can evaluate your exposure history, identify potentially responsible manufacturers, and pursue claims through trust funds or civil litigation. Contact O’Brien Law Firm to discuss your potential case and understand your options for compensation. ## Missouri DNR Asbestos Notification Records

The following 1 project notification(s) are documented with the Missouri Department of Natural Resources (NESHAP program) for Missouri Department of Transportation in Villa Ridge. These are public regulatory records. | Project ID | Year | Site / Building | Operation | ACM Removed | Contractor | |:———–|:—-:|:—————-|:———-|:————|:———–| | 12752-2025 | 2025 | bridge over Missouri Central Railroad | Demolition | n-f insul comp (23sf) | Marschel Wrecking |

Source: Missouri Department of Natural Resources, NESHAP Asbestos Abatement & Demolition/Renovation Notification Program — public regulatory records.

Recent News & Developments

No facility-specific news articles, regulatory enforcement actions, or litigation records pertaining exclusively to Pea Ridge Iron Mine in Sullivan, Franklin County, Missouri have appeared in recent public records searches. However, the historical and operational profile of this underground iron ore mine — which operated from 1964 until its closure in 2001 — is consistent with conditions that regulators and courts have repeatedly scrutinized at comparable mid-twentieth-century industrial mining operations. Operational Incidents

Pea Ridge was one of the deepest iron ore mines in North America, with operations extending more than 1,700 feet below the surface. The extreme heat generated at those depths required extensive mechanical ventilation, refrigeration systems, and insulated piping infrastructure — all systems that commonly incorporated asbestos-containing materials during the mine’s peak operational decades. No major explosions or fires resulting in documented asbestos fiber release at this specific site have surfaced in publicly available records. The mine’s 2001 permanent closure, however, would have triggered federal regulatory obligations under NESHAP (40 CFR Part 61, Subpart M), which requires notification and inspection protocols for asbestos-containing materials prior to demolition or decommissioning of industrial structures. Regulatory Landscape

Because no active EPA enforcement actions or OSHA citations specific to Pea Ridge Iron Mine appear in accessible public databases, former workers should be aware of the general regulatory framework governing facilities of this type. OSHA’s asbestos standard for general industry (29 CFR 1910.1001) and its construction standard (29 CFR 1926.1101) both apply to maintenance and renovation activities at facilities where asbestos-containing insulation was installed. Missouri Department of Natural Resources has jurisdiction over asbestos abatement activity at decommissioned industrial sites within the state. Product Identification Context

Mining operations of Pea Ridge’s era routinely procured pipe insulation, boiler lagging, gaskets, and refractory cements from major manufacturers including Johns-Manville, Owens-Corning, Armstrong World Industries, and W.R. Grace. While no public records directly link named product manufacturers to specific materials installed at Pea Ridge, discovery in asbestos litigation involving comparable underground mining operations has historically identified these suppliers as common sources of asbestos-containing thermal insulation used in pump houses, compressor rooms, hoisting facilities, and underground service areas. Litigation

No publicly reported asbestos verdicts or settlements naming Pea Ridge Iron Mine or its operators — Meramec Mining Company and its successors — as defendants have been identified in accessible Missouri court records or published legal databases at this time. This absence of public record does not preclude the existence of confidential settlements or sealed proceedings. Workers or former employees of Pea Ridge Iron Mine Sullivan Franklin County Missouri asbestos insulation who were diagnosed with mesothelioma, lung cancer, or asbestosis may have legal rights under Missouri law. Missouri § 537.046 extends the civil filing window for occupational disease claims. —

Pea Ridge Iron Mine Asbestos Exposure Legal Rights