Mesothelioma Lawyer Missouri: Dallman Power Station Asbestos Exposure & Your Legal Rights

⚠️ URGENT FILING DEADLINE: MISSOURI WORKERS AND FAMILIES

Missouri’s statute of limitations for asbestos personal injury claims is 5 years from diagnosis under Mo. Rev. Stat. § 516.120.

Missouri HB1649, pending for the 2026 legislative session, would impose strict asbestos trust disclosure requirements on cases filed after August 28, 2026. Workers and families who have not yet filed could face dramatically more complicated legal proceedings if that bill passes.

Do not wait. If you or a family member has been diagnosed with mesothelioma, asbestosis, lung cancer, or another asbestos-related illness after working at Dallman Power Station, your clock is already running. Call a qualified asbestos attorney in Missouri today.

If You Worked at Dallman Station and Are Now Ill

Dallman Power Station operated in Springfield, Illinois for over 52 years. Hundreds of workers—from skilled tradespeople to maintenance personnel—may have been exposed to asbestos-containing materials during construction, operation, and decommissioning.

If you worked at Dallman Station and have since been diagnosed with mesothelioma, asbestosis, lung cancer, or another asbestos-related illness, you may have the legal right to substantial financial compensation from the manufacturers and distributors of the asbestos-containing products you encountered on that job.

Springfield drew tradespeople from across the Mississippi River industrial corridor—pipefitters, insulators, and boilermakers from Missouri who regularly crossed into Illinois for major power plant outages and construction projects. Workers from Missouri union locals who performed outage work at Dallman may have legal claims in both Missouri and Illinois courts.

This article explains:

What happened at Dallman Station and which workers were at risk
What legal steps you can take right now
How to access Missouri mesothelioma settlements and asbestos trust fund compensation

Missouri HB1649 could make filing after August 28, 2026 significantly more burdensome. If you have been diagnosed, consult a mesothelioma lawyer in Missouri immediately.

Facility Overview and Operational History

Location, Ownership, and Timeline

Dallman Power Station operated in Springfield, Illinois under the city’s municipal utility, City Water, Light and Power (CWLP).

The facility:

Reportedly began operations in 1968
Operated as a coal-fired steam generating station for over 52 years
Closed in 2020
Generated approximately 90.2 megawatts (MW) at peak operation

The station was named after Harold C. Dallman, a longtime CWLP employee, and was constructed during the mid-20th century when asbestos-containing materials were the industry standard for thermal insulation and fire protection throughout American power plants.

The Mississippi River Industrial Corridor: Why Missouri Workers Were There

Springfield’s Dallman Station was one of dozens of coal-fired power facilities lining the Mississippi River throughout Illinois and Missouri. From AmerenUE’s Labadie Energy Center and Portage des Sioux Power Plant on the Missouri bank to Dallman and industrial facilities in Granite City and Madison County on the Illinois side, the corridor was defined by coal-fired steam generation.

Asbestos-containing materials were the universal insulation standard across all these facilities—and the same tradespeople, contractors, and asbestos product lines moved site-to-site throughout this regional industrial economy. Missouri insulators, pipefitters, and boilermakers regularly crossed the Mississippi to work outages at Illinois power plants.

Why Hundreds of Workers Were at Occupational Risk

Dallman Station’s operational complexity required a large, diverse workforce:

Direct municipal employees — CWLP plant operators, electricians, engineers, maintenance workers
Outside contractors — hired for construction, overhauls, boiler maintenance, and retrofits
Specialized tradespeople — insulators from Heat and Frost Insulators Local 1 (St. Louis, MO), pipefitters from Plumbers and Pipefitters UA Local 562 (St. Louis, MO), boilermakers from Boilermakers Local 27 (St. Louis, MO), welders, and laborers

Members of these Missouri-based union locals regularly traveled to work major outages at Dallman. Because their home local was in Missouri but the work was performed in Illinois, these workers may have claims under both states’ laws and may be able to file in multiple jurisdictions.

This employment structure matters legally: outside contractors often had limited knowledge of on-site hazard controls and may not have received adequate warnings about asbestos-containing materials present at the facility.

When Asbestos-Containing Materials Were Installed: Construction and Renovation Timeline

Workers at Dallman Station may have encountered asbestos-containing materials during several distinct phases of the facility’s life.

Original Construction and Commissioning (1960s)

The plant was designed when asbestos-containing materials were integrated throughout coal-fired power plants as the standard choice for thermal insulation, fireproofing, and gasketing. Initial installation of asbestos-containing pipe insulation from Johns-Manville, Owens-Illinois, and Armstrong World Industries; boiler insulation; turbine insulation; gaskets; and spray-applied fireproofing allegedly occurred during this phase.

Products such as Kaylo pipe covering, Thermobestos products, and similar thermal insulation systems may have been present at the facility during this period.

Construction-phase workers—including members of Heat and Frost Insulators Local 1 and UA Local 562 dispatched from St. Louis—were sent to major Illinois power plant construction projects throughout the 1960s and 1970s. Similar construction-era exposures have been documented in litigation involving AmerenUE’s Labadie Energy Center in Franklin County, Missouri, and Portage des Sioux Power Plant in St. Charles County—facilities built during the same era using the same categories of asbestos-containing insulation products.

Unit Expansions and Equipment Upgrades (1970s–1980s)

Additional generating capacity and equipment modifications reportedly involved further installation of insulation products from Johns-Manville, Celotex, and Georgia-Pacific; gaskets from Garlock Sealing Technologies; packing materials; and fireproofing that may have contained asbestos-containing materials.

By this period, information about asbestos health hazards was more widely circulated within the industry—yet asbestos-containing products continued to be installed in operating power plants throughout this era.

Workers from Missouri union locals including Heat and Frost Insulators Local 1, UA Local 562, and Boilermakers Local 27 reportedly participated in these upgrade and expansion projects alongside CWLP’s permanent workforce.

Routine Maintenance and Outage Cycles (1968–2020)

Every year, and approximately every 5–10 years for major overhauls, the station underwent planned maintenance frequently requiring:

Removal and replacement of asbestos-containing gaskets, packing, and tape from Garlock Sealing Technologies, Crane Co., and Combustion Engineering equipment
Disturbance of existing pipe and boiler insulation allegedly containing Kaylo, Thermobestos, and Aircell products
Handling of asbestos-containing valve components, turbine seals, and equipment casings from Garlock and Armstrong World Industries

Workers performing or assisting with these outages may have been exposed to asbestos fibers released during removal and reinstallation of insulation, gaskets, and related materials. Major outage work at Dallman Station reportedly drew tradespeople from Missouri union halls—particularly Heat and Frost Insulators Local 1 and UA Local 562 in St. Louis—who worked alongside permanent plant staff and other contractors throughout the facility’s operational life.

Decommissioning and Closure (2020)

Plant closure carried additional asbestos exposure hazards. Workers involved in demolition, equipment removal, and abatement during closure—potentially including members of Heat and Frost Insulators Local 1, Plumbers and Pipefitters UA Local 562, and Boilermakers Local 27—may have been exposed to asbestos-containing materials disturbed during this phase.

For legal purposes, this matters: Missouri residents who worked at Dallman during decommissioning and who were subsequently diagnosed with mesothelioma or another asbestos-related disease may still have viable claims under Missouri’s 5-year statute of limitations—but the 2026 legislative threat makes acting now, not later, essential.

Missouri HB1649 would impose new trust disclosure requirements on cases filed after August 28, 2026. Do not assume you have years to spare. Call a mesothelioma lawyer in Missouri today.

Why Asbestos Was Standard in Coal-Fired Power Plants

Properties That Made It the Industry Default

Asbestos—a naturally occurring fibrous silicate mineral—was standard throughout most of the 20th century in power plant environments because of specific physical properties:

Heat resistance: Asbestos fibers withstand temperatures exceeding 1,000°F without degrading, making them the practical choice for insulating high-pressure steam systems
Thermal efficiency: Asbestos-containing insulation reduced heat loss from steam pipes and boilers, improving generating efficiency
Electrical insulation: Asbestos-containing materials were applied in electrical panels, switchgear, and conduit systems
Fire protection: Spray-applied asbestos-containing fireproofing protected structural steel and satisfied building codes of the era
Chemical resistance: Asbestos-containing gaskets and packing resisted corrosion from high-temperature steam, water, and industrial chemicals
Cost: Asbestos-containing products were substantially cheaper than available alternatives

The Era of Asbestos in American Industrial Power Plants (1930s–1970s)

From approximately 1930 through the mid-1970s, asbestos-containing materials dominated these applications across virtually all American industrial power facilities, including municipally owned utilities like CWLP.

The same manufacturers whose products were allegedly standard at Dallman Station—Johns-Manville, Owens-Illinois, Armstrong World Industries, W.R. Grace, Georgia-Pacific, Celotex, Eagle-Picher, and others—supplied asbestos-containing insulation to coal-fired power plants throughout Missouri and Illinois, including:

AmerenUE’s Labadie Energy Center (Franklin County, Missouri)
Portage des Sioux Power Plant (St. Charles County, Missouri)
Granite City Steel complex (Madison County, Illinois)
Facilities lining both banks of the Mississippi River between St. Louis and Alton

These products were reportedly built into every major pipe run, boiler exterior and internal refractory system, turbine casings and valve assemblies, electrical distribution equipment, structural steel fireproofing, and auxiliary equipment throughout facilities of this type.

Even after occupational health hazards became documented in the 1970s and 1980s, existing asbestos-containing materials in operating plants frequently remained in place. Facility operators often took the position that leaving intact insulation undisturbed posed less risk than disturbing it during maintenance—a position that proved wrong when removal became unavoidable during outage cycles.

Asbestos-Containing Materials Allegedly Present at Dallman Station

Based on construction methods, equipment specifications, and procurement patterns common to coal-fired power plants of Dallman’s era, workers at the facility may have encountered the following categories of asbestos-containing materials:

Thermal Insulation Products

Johns-Manville products: Kaylo pipe covering and block insulation, Transite board, insulating cement
Owens-Illinois products: Fibreboard insulation, pipe insulation blocks
Armstrong World Industries: Pipe insulation and block products
Celotex and Georgia-Pacific: Insulation board and blanket materials
W.R. Grace: Monokote spray-applied fireproofing and insulating products
Philip Carey Manufacturing: Pipe covering and block insulation
Unarco Industries: Unibestos pipe insulation

Gaskets, Packing, and Sealing Materials

Garlock Sealing Technologies: Sheet gaskets, rope packing, and valve stem packing — found throughout high-temperature steam and