About Holden Johnson Missouri

Associated Electric Cooperative, Inc.: Corporate Overview

Associated Electric Cooperative, Inc. (AEC) was founded in 1961 as a generation and transmission cooperative headquartered in Springfield, Missouri. The cooperative provides wholesale power to Missouri’s rural electric cooperatives, which serve member households and businesses across much of the state. AEC is owned by six regional cooperatives and serves more than 900,000 Missouri residents.

During the 1960s and 1970s, AEC expanded rapidly, building large-scale coal-fired generating facilities to meet growing demand. AEC’s principal generating facilities include:

  • Thomas Hill Energy Center (near Clifton Hill, Missouri)
  • New Madrid Power Plant (New Madrid County, Missouri)
  • West-central Missouri generating infrastructure (serving areas including Johnson County, where Holden is located)

AEC’s generating portfolio placed it squarely within the network of Missouri utilities that relied on asbestos-containing materials during their peak construction and expansion phases. Missouri’s other major power generation facilities — including the Labadie Energy Center (Union Electric/Ameren Missouri) in Franklin County and the Portage des Sioux Power Plant in St. Charles County — have both generated substantial asbestos litigation, with former workers and their families filing claims in St. Louis City Circuit Court, the primary Missouri venue for asbestos cases. AEC workers and their families may have similar legal avenues available to them.

Johnson County and the Holden Region

Holden, Missouri is the county seat of Johnson County, located in west-central Missouri approximately 60 miles southeast of Kansas City. The region’s proximity to Missouri’s coal-bearing geology and transportation infrastructure made it a natural location for power generation development.

Electric cooperative facilities serving this region underwent multiple construction, expansion, and maintenance cycles — the majority during the **peak era of asbestos use in American industry: 1940 through 1980. Johnson County sits within the broader west-central Missouri industrial zone. Workers who may have been exposed at AEC facilities often also worked at Kansas City-area industrial facilities at various points in their careers, accumulating additional potential asbestos exposures that are directly relevant in building a comprehensive litigation history.

Construction and Operational Phases That Created Exposure Risk

Coal steam generating stations went through multiple construction phases. Each phase created periods of intensive potential worker exposure to asbestos-containing materials.

**Initial Construction

  • Workers may have installed structural insulation and fireproofing using asbestos-containing materials
  • Steam and hot water piping may have been insulated with products reportedly including pipe covering and insulation, pipe covering, and pipe insulations
  • Boiler lagging and refractory materials are alleged to have been applied throughout the facility
  • Floor tiles, ceiling tiles, and building materials reportedly containing asbestos-containing materials may have been installed throughout

**Unit Additions and Capacity Expansions

  • New generating units may have been installed alongside existing infrastructure
  • New structural systems may have incorporated asbestos-containing fireproofing materials
  • Spray-applied asbestos fireproofing products — allegedly including spray fireproofing-brand materials — may have been applied to structural steel
  • New insulation systems and fire protection materials are alleged to have been installed throughout

**Scheduled Outage Maintenance and Overhauls

  • Workers may have disturbed and removed existing asbestos-containing materials during planned outages
  • Insulation systems reportedly containing asbestos-containing products may have been repaired and replaced repeatedly over decades
  • Personnel conducting this work may have been exposed to asbestos-containing materials without adequate respiratory protection
  • Work was frequently conducted in environments where fiber-bearing materials had already degraded with age

**Emergency Repair Work

  • Rapid response to equipment failures often proceeded without full asbestos hazard recognition
  • Workers may have disturbed existing asbestos-containing insulation under uncontrolled conditions
  • Enclosed equipment spaces with poor ventilation may have concentrated airborne fiber levels during high-intensity repair work

General Equipment at Holden Johnson Missouri

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.

Industrial Boilers View crosswalk › Process Piping View crosswalk › Pipe Insulation View crosswalk › Block Insulation View crosswalk › Valves View crosswalk › Gaskets View crosswalk › Pumps View crosswalk › Heat Exchangers View crosswalk › Cooling Equipment View crosswalk ›

Documented Asbestos Evidence

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:

Thermal System Insulation View crosswalk › Asbestos-Cement Board View crosswalk › Pipe Insulation View crosswalk › Roofing & Flashing View crosswalk › Spray Fireproofing View crosswalk › Floor Tile & Mastic View crosswalk › Ceiling Tile View crosswalk › Gaskets & Packing View crosswalk ›

Critical 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

  1. 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.
  2. Preserve medical records. Pathology reports, biopsy results, imaging, and pulmonary-function tests are central to both civil claims and trust-fund filings.
  3. 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.
  4. 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

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 compensation 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

Information about facility equipment, industrial materials, and occupational records referenced on this page is drawn from publicly available sources where applicable, including:

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.