Western MacArthur Asbestos Trust
Eligibility, payouts, and how to file. Last reviewed: 2026-05-03.
See if you qualify for the Western MacArthur Trust
About the Western MacArthur Trust
Western MacArthur was a major distributor and installer of asbestos-containing insulation products in the western United States from the 1940s through the early 1980s. The company purchased products from manufacturers like Manville, Owens-Illinois, and Pittsburgh Corning, then sold and installed them at customer sites — primarily refineries, power plants, shipyards, and industrial facilities in California and the broader Pacific region.
Western MacArthur filed for Chapter 11 bankruptcy in 2002 and the Western MacArthur Asbestos Trust was confirmed in 2003. The trust pays at 18% pro rata on a $60,000 scheduled mesothelioma value, producing estimated payouts of $9,500–$12,500 per claim.
Bankruptcy and trust establishment
The Western MacArthur Trust covers a similar claimant population to Plant Insulation: workers exposed to asbestos products that Western MacArthur distributed and installed. The two trusts are routinely filed together by western U.S. industrial workers who may not know specifically which contractor installed the products they were exposed to.
Products and exposure sources covered
The trust covers asbestos insulation products distributed and installed by Western MacArthur — pipe insulation, block insulation, fireproofing, gaskets, and various high-temperature materials sourced from major manufacturers. Western MacArthur's geographic footprint was concentrated in California, Oregon, Washington, Nevada, and Arizona.
Specific asbestos-containing products manufactured or distributed by this company:
- Distributed insulation products
- Asbestos contracting services
Eligibility criteria
To file a claim with the Western MacArthur Trust, you generally need to demonstrate:
- Qualifying diagnosis: Mesothelioma, Lung cancer, Asbestosis
- Documented exposure to Western MacArthur Trust products during the trust's covered exposure window (1950–1985)
- Work history records placing you at a job site where these products were used (employer records, union records, witness statements, military service records)
- Medical documentation (pathology reports, imaging, treating physician records)
Former Western MacArthur employees have direct exposure paths. Workers at facilities served by Western MacArthur (Bay Area refineries, Pacific Northwest power plants, California shipyards, industrial plants throughout the western U.S.) qualify if they can document presence during installation periods. Multi-trust filing alongside Plant Insulation, J.T. Thorpe, and the underlying manufacturer trusts is standard.
How to file with the Western MacArthur Trust
- Gather documentation — diagnosis records, work history, military service records (DD-214), product identification
- Complete the trust's claim form — Each trust has its own form
- File with all applicable trusts — multi-trust filing simultaneously is the standard approach
- Trust review — typically 3–9 months
- Payment — typically 2–6 months after approval
Most claimants qualify for several trusts, not just one. Filing with all applicable trusts at once maximizes total compensation. Start your free case review and we'll identify every applicable trust for your specific work history.
Compensation amounts
Reported scheduled value for mesothelioma claims: $60,000. The trust's current pro rata payment percentage is 18%, meaning the actual payout typically falls in the range of $9,500–$12,500.
These figures are based on Trust Distribution Procedures (TDPs) and historical payout data. Pro rata percentages can change. Actual recovery varies by case factors including diagnosis severity, exposure documentation, and trust funding levels at the time of payment. Past payouts do not guarantee future amounts.
Common qualifying occupations
The Western MacArthur Trust commonly accepts claims from workers in these occupations:
Multi-trust filing strategy
The Western MacArthur Trust is rarely the only trust a mesothelioma claimant qualifies for. Most workers exposed to distributed insulation products were also exposed to products covered by other bankruptcy trusts. Filing with multiple trusts simultaneously is standard practice and significantly increases total compensation.
Related trusts that often apply alongside the Western MacArthur Trust
- Johns Manville Trust — 5.1% pro rata, est. payout $1,100–$4,500
- Owens Corning / Fibreboard Trust — 26.2% pro rata, est. payout $45,000–$70,000
- W.R. Grace Trust — 31% pro rata, est. payout $50,000–$65,000
- Celotex Trust — 5.5% pro rata, est. payout $3,000–$5,000
- UNR Trust — 4% pro rata, est. payout $800–$1,200
Deadlines and statute of limitations
The Western MacArthur Trust generally accepts claims on a rolling basis with no fixed annual deadline, though the trust may modify procedures from time to time. The applicable statute of limitations for the underlying asbestos claim depends on your state of residence and typically runs from the date of diagnosis (1–3 years in most states for personal injury; longer for wrongful death in some jurisdictions).
Always verify current deadlines with the trust administrator or a licensed attorney before filing. We track deadlines for our clients so you don't miss a filing window.
Frequently asked questions
I worked at a California refinery — does Western MacArthur apply?
Likely yes. Western MacArthur was a major insulation contractor for California refineries during the 1940-1985 period. Refinery workers, pipefitters, and maintenance personnel from this era often have eligible exposure to Western MacArthur-installed products. Multi-trust filing with Plant Insulation, J.T. Thorpe, and Thorpe Insulation is recommended.
How is Western MacArthur different from Plant Insulation?
Both were major western U.S. insulation contractors that installed asbestos products at industrial sites. Their geographic and customer overlap was substantial — many facilities had both Western MacArthur and Plant Insulation crews working on different projects over the years. Filing with both trusts is standard for western U.S. industrial workers.
I was a Bay Area shipyard worker. Could Western MacArthur apply?
Possibly yes if Western MacArthur supplied insulation to that shipyard. Mare Island Naval Shipyard, Hunters Point Naval Shipyard, and various Bay Area civilian shipyards used multiple contractor sources. Documentation through shipyard records or witness statements about specific contractors can establish eligibility.
Should I file with Western MacArthur if I already filed manufacturer claims?
Yes, file all applicable contractor trust claims separately from manufacturer claims. Contractor trusts cover liability from installation operations — distinct from manufacturer trusts covering product liability. A single exposure event (e.g., Manville pipe insulation installed by Western MacArthur at a refinery) generates eligible claims against both Manville Trust AND Western MacArthur Trust.
My grandfather was a former Western MacArthur employee — can I file as a survivor?
Yes. Wrongful death claims for former Western MacArthur employees are accepted with appropriate documentation: employment records, marriage/family records, death certificate showing meso/asbestos cause, and medical records.
Sources and verification
Information on this page is based on publicly available Trust Distribution Procedures (TDPs), bankruptcy court Plans of Reorganization (PACER), trust annual reports, and RAND Institute for Civil Justice asbestos trust research. Reviewed quarterly.
Last reviewed: 2026-05-03 · Next scheduled review: 2026-08-03
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