Missouri asbestos claims turn on three things: when the filing clock actually started, whether the exposure reaches a bankruptcy trust as well as a solvent company, and whether the employer itself can be sued — a question Missouri answers differently from most states. This page sets out what the statutes say, with citations, and what records a Missouri work history is rebuilt from.

When the Missouri clock starts

Missouri gives asbestos personal-injury claims five years. The period comes from Mo. Rev. Stat. § 516.120, which opens “Within five years:” and reaches these claims through subdivision (4) — “An action for taking, detaining or injuring any goods or chattels, including actions for the recovery of specific personal property, or for any other injury to the person or rights of another, not arising on contract and not herein otherwise enumerated.”

The harder question is when those five years begin, and Missouri answers it by a separate statute. Under Mo. Rev. Stat. § 516.100, a cause of action “shall not be deemed to accrue when the wrong is done or the technical breach of contract or duty occurs, but when the damage resulting therefrom is sustained and is capable of ascertainment.”

That phrase matters more than the five years does. “Capable of ascertainment” is not the same as “the date written on the pathology report.” It asks when the damage became capable of being discovered, which is an objective question a court decides on the facts. A page that tells you the clock runs from the date of diagnosis is giving you the usual case, not the rule — and in the direction that matters, because if the damage was capable of ascertainment earlier than the formal diagnosis, the real deadline is earlier than five-years-from-diagnosis suggests. This is the first thing to get an opinion on, not the last.

Two recent bills would have shortened the period and neither became law: HB 68 (2025) proposed cutting personal injury from five years to two, and HB 1664 (2026) proposed cutting it to three. Both failed in the Senate. The five-year period in § 516.120 remains in force.

Railroad employment is governed by a different statute

The deadline above is Missouri’s, and it does not govern every Missouri asbestos claim. A railroad employee’s claim against the railroad arises under the Federal Employers’ Liability Act, a federal statute with its own limitation period, its own accrual rule and its own causation standard. Missouri was a rail state — Union Pacific and the St. Louis terminal district appear throughout the records below — so this is not an edge case here. Which body of law governs a particular work history is a question for a lawyer, and in the railroad cases it is usually the first one.

After a death

A wrongful-death claim is a separate action on a separate clock. Mo. Rev. Stat. § 537.100 requires that it “be commenced within three years after the cause of action shall accrue.” Three features of that section are easy to miss:

  • Service, not just filing. The petition must be served “within one hundred eighty days of the filing of the petition,” or the court shall dismiss — without prejudice, unless a prior nonsuit occurred.
  • An absent defendant does not run the clock. If a defendant is outside Missouri so that personal service cannot be made, “the time during which such defendant is so absent from the state shall not be deemed or taken as any part of the time limited for the commencement of such action.”
  • A one-year savings period. After a nonsuit, a judgment arrested, or a reversal on appeal, a plaintiff “may commence a new action from time to time within one year.”

Who may bring it is fixed by Mo. Rev. Stat. § 537.080, in classes and in order: first the spouse, children or surviving lineal descendants of deceased children, or the father or mother; if no one in that class is entitled to sue, then a brother or sister of the deceased or their descendants who can establish the right; and if neither class can proceed, a plaintiff ad litem appointed by the court. The section also fixes a rule that shapes families’ decisions: “Only one action may be brought under this section against any one defendant for the death of any one person.”

The personal-injury clock and the wrongful-death clock are independent. Preserving one does not extend the other.

The employer question Missouri answers differently

In most states a worker cannot sue their own employer for an occupational disease, because workers' compensation is the exclusive remedy. Missouri has carved mesothelioma out of that, and the carve-out is conditional on something the employer chose.

Mo. Rev. Stat. § 287.200 lets an employer elect to accept mesothelioma liability and provide an enhanced occupational-disease benefit through insurance, self-insurance, or a group pool. The consequence of declining is the part that matters to a claim: “For employers who reject mesothelioma under this subsection, then the exclusive remedy provisions under section 287.120 shall not apply to such liability.”

In plain terms — whether a Missouri mesothelioma claim can be brought against the employer at all can depend on an election that employer made, years ago, in its insurance arrangements. It is a documentary question, and it is one most intake conversations never reach. The provisions carry a sunset date of December 31, 2038.

Where Missouri asbestos cases are filed

Missouri asbestos cases are filed in the state circuit courts, and the Circuit Court for the City of St. Louis — the 22nd Judicial Circuit — is among the courts where they are brought. We make no claim here about what share of the state’s asbestos filings any one circuit handles; see what we could not verify. Venue, the right defendants, and whether a federal or FELA route applies are decisions made on the specific work history, not from a map.

Missouri jobsites named in trust and federal records

A Missouri claim is built from the plants, not from the diagnosis. This site publishes 352 documented Missouri jobsite pages, and 233 of those facilities match the approved-site list of at least one asbestos bankruptcy trust — 13 distinct trusts across the Missouri set, with coverage periods running from the early 1900s through 1982. Those coverage years are not decoration: a trust pays on exposure inside its own covered window at an approved site, so the years a person worked can decide whether a trust route exists at all alongside a civil claim.

The largest Missouri overlaps are the Owens-Corning / Fibreboard trust (186 Missouri facilities), W.R. Grace (121), Babcock & Wilcox (107) and A.P. Green Industries (90) — the last a refractories maker headquartered in Mexico, Missouri, whose products travelled to furnaces and boiler settings across the state.

Missouri facilities that recur in publicly filed asbestos litigation include:

Browse all documented Missouri asbestos jobsites →

Few work histories involve a single site. Tradesmen moved between plants on shutdowns and turnarounds, and a Missouri exposure history is usually several employers, several premises and several product lines — which is why reconstructing it is the work.

The full Missouri index. This site publishes 343 documented Missouri jobsite pages; the facilities named above are the ones that recur most often in publicly filed litigation. The remainder are listed here so each is reachable:

Power generation (56)
Refineries & chemical (20)
Steel, foundries & smelters (13)
Railroads (5)
Paper, glass & manufacturing (21)
Schools & universities (5)
Hospitals & institutions (7)
Mines & quarries (12)
Other documented Missouri worksites (198)

Missouri trades and union halls

Union records are often the only surviving proof of who was dispatched where, and in which years. Missouri halls documented on this site include:

For the insulators specifically, the International Association of Heat and Frost Insulators locals relevant to Missouri work are Local 1 (St. Louis) and Local 27 (Kansas City). A hall’s journal, dispatch book or traveller records can place a member at a plant in a year that no employer record survives for.

What a Missouri mesothelioma lawyer reconstructs

The claim is an evidentiary exercise, and these are the materials it runs on:

  1. Employment record — Social Security earnings history, employer personnel files where they survive, and union dispatch or journal entries.
  2. Premises and ownership chain — who owned and operated the plant in the years worked, and which successor entity carries the liability now.
  3. Product identification — which manufacturers’ insulation, gaskets, packing, refractory or friction products were specified at that facility, from procurement records, invoices and equipment manuals rather than recollection alone.
  4. Trust eligibility — whether each site appears on a trust’s approved-site list for the years worked, which is a documentary test, not an argument.
  5. Co-worker corroboration — the people who can place someone in a space. This is the material that disappears fastest.
  6. Medical causation — the diagnosis, the pathology, and the link to exposure.

Steps 1 through 5 get harder every year. Records are discarded on schedules, plants are demolished, and witnesses are in their seventies and eighties. That — rather than the five-year statute — is usually the real constraint on a Missouri case.

Questions from Missouri families

Does the five-year deadline run from diagnosis? Usually it is measured from there, and this site’s other pages describe it that way. But the statute that fixes accrual is § 516.100, and its test is when the damage was “sustained and is capable of ascertainment.” If that date is earlier than the diagnosis, the deadline is earlier too. Get an opinion on the specific facts rather than relying on a general rule.

A parent died years ago. Is it too late? Two separate clocks apply, and the wrongful-death period in § 537.100 runs from accrual, with tolling while a defendant is outside Missouri and a one-year savings period after a nonsuit or reversal. Whether anything remains open is a question about the specific dates.

Can we sue the employer, or only collect workers’ compensation? In Missouri that can depend on whether the employer elected to accept mesothelioma liability under § 287.200. An employer that rejected it does not get § 287.120 exclusivity for that liability.

Do trust claims require a lawsuit? No. Trust claims are filed against the trusts’ own criteria and can proceed independently of a civil action. The asbestos bankruptcy trusts hold over $30 billion set aside to pay people harmed by their products.

We only know the plant, not the products. That is the normal starting position. Product identification is reconstructed from the facility’s records, not from the family’s memory.

Sources

Statutes read 2026-10-06 from the Missouri Revisor of Statutes (revisor.mo.gov), the state’s official publication.

  • Statutes: Mo. Rev. Stat. § 516.120 (five-year period; subdiv. (4)) · § 516.100 (accrual — “sustained and is capable of ascertainment”) · § 537.080 (who may sue; one-action rule) · § 537.100 (three years after accrual; 180-day service; absence tolling; one-year savings) · § 287.200 (mesothelioma election; rejection and § 287.120 exclusivity; sunset 31 Dec 2038) · § 287.120 (exclusive remedy).
  • Legislation: HB 68 (2025) and HB 1664 (2026), both failed in the Senate.
  • Records: approved-site lists of the asbestos bankruptcy trusts matched against this site’s Missouri facility pages; counts recomputed 2026-10-06 (352 Missouri jobsite pages; 233 with at least one trust approved-site match; 13 distinct trusts; coverage periods to 1982).

What we could not verify

  • That any one Missouri circuit handles most of the state’s asbestos filings, or that Missouri operates a designated asbestos docket. Both are commonly asserted. We found no filing statistics or judicial source for either and make no such claim.
  • How Missouri courts have applied “capable of ascertainment” to latent asbestos disease specifically. The statutory test is quoted above from the official code. We have run no citator check and cite no decisions construing it; the citation is given so that a lawyer can.
  • Which individual employers elected or rejected mesothelioma liability under § 287.200. That is a documentary question about a particular employer’s arrangements and is not something we hold.
  • Trust coverage windows as eligibility. The years shown come from trust approved-site lists as published. Each trust sets its own exposure-date and evidentiary requirements, and a site appearing on a list is not by itself a determination that any claim qualifies.

If you have been diagnosed with mesothelioma, asbestos-related lung cancer or asbestosis after asbestos exposure at a Missouri jobsite, in the military, or in a Missouri building, you may have legal rights. If a parent or spouse died of mesothelioma after asbestos exposure at a Missouri jobsite, the estate may have legal rights. O’Brien Law Firm is a Missouri firm and handles Missouri asbestos claims. What matters most in that first conversation is the plant, the department and the years — (314) 237-7046.

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