Asbestos Exposure at Hawthorn Generating Station — Kansas City Power & Light Workers

Source note: Products, equipment, and companies identified in this article are drawn from public asbestos litigation records, court filings, EPA and OSHA regulatory databases, and publicly available industry records. Product identifications and company references reflect what has been alleged or documented in publicly filed litigation. This article does not constitute a finding of liability against any company.

If you worked at Hawthorn Generating Station and you have been diagnosed with mesothelioma, lung cancer, or asbestosis — or if a family member has — the clock is already running. For decades, workers at this Kansas City coal plant were surrounded by asbestos-containing materials. Johns-Manville, Owens-Illinois, Eagle-Picher, and Crane Co. have each been alleged in publicly filed asbestos litigation to have failed to adequately warn workers of health risks associated with their products. Legal claims against them — and against asbestos bankruptcy trusts — remain available in Missouri today. Under § 516.120 RSMo, you have five years from the date of your diagnosis to file. Every month you wait is a month that evidence erodes, witnesses age, and your options narrow.

What Happened at Hawthorn Generating Station

A Coal-Fired Plant Built on Asbestos

Hawthorn Generating Station sits along the Missouri River in Kansas City, Missouri. Kansas City Power & Light — now Evergy following its 2018 merger with Westar Energy — has operated this coal-fired facility since the 1950s.

At its core, Hawthorn is an industrial steam system of extraordinary scale. Subbituminous coal burns in massive boilers to produce superheated steam — temperatures above 1,000 degrees Fahrenheit, pressures exceeding 2,000 pounds per square inch — that drives turbine generators. Every component in that system runs hot. Through most of the twentieth century, asbestos was the insulation material of choice for hot industrial systems.

The mineral was cheap, abundant, and effective. It was also lethal. Johns-Manville, Owens-Illinois, Eagle-Picher, and Combustion Engineering knew by the 1930s and 1940s — and certainly by the 1950s — that asbestos fibers caused fatal lung disease. They withheld that knowledge from the workers who handled their products. The asbestos exposure those workers received at Missouri industrial facilities like Hawthorn created a public health crisis whose consequences are still being diagnosed today.

Hawthorn was not an isolated site. It was part of a dense corridor of coal-fired power generation and heavy manufacturing along both sides of the Mississippi and Missouri Rivers. Many of the same insulators, pipefitters, and boilermakers who worked at Hawthorn also worked at AmerenUE’s Labadie and Portage des Sioux plants on the Missouri side, and at facilities in the Metro East Illinois communities — including operations tied to Granite City Steel and the Monsanto chemical complex in Sauget. The asbestos products were identical. The manufacturers were identical. The exposure was equivalent, whether a worker crossed into Illinois for a job or stayed in Missouri.

A 2014 explosion and fire at Hawthorn drew public attention to the plant’s aging infrastructure. The quieter hazard had done its damage decades earlier — in the boiler rooms where Johns-Manville Thermobestos pipe covering was cut and fitted, and in the turbine halls where Owens-Illinois Kaylo block insulation was sawed to length.

Where Asbestos Appeared Throughout the Plant

Asbestos was present in virtually every system at the facility from the 1950s through the 1980s, as alleged in publicly filed litigation records:

Block and pipe insulation on steam lines, feedwater lines, and condensate return lines — including Johns-Manville Thermobestos, Owens-Illinois Kaylo, and Eagle-Picher Superex
Boiler insulation — both interior refractory and exterior lagging, including Combustion Engineering refractory materials and W.R. Grace Monokote fireproofing
Gaskets and packing inside valves, pumps, flanges, and expansion joints — including Garlock Sealing Technologies compressed asbestos sheet gaskets and Crane Co. Cranite gasket material
Turbine insulation on casing, steam chest, and associated piping — including Armstrong World Industries Aircell and Johns-Manville Unibestos block
Electrical insulation on wire, cable, switchgear, and panel components
Ceiling and floor tiles in plant buildings and control rooms
Fireproofing materials applied to structural steel — including W.R. Grace Monokote sprayed fireproofing
Duct insulation on ventilation and air handling systems
Boiler rope and blankets used during maintenance and repair

Cutting, fitting, or removing installed Thermobestos, Kaylo, Cranite, or Monokote released fibers into the air. Workers inhaled those fibers. There was no safe level of exposure.

Generating Units — Official EIA Form 860 Record

The following unit-level data is drawn from the U.S. Energy Information Administration (EIA) Form EIA-860 Annual Electric Generator Report, the official federal registry of every U.S. power generating unit.

Unit	Online Date	Nameplate Capacity	Prime Mover	Fuel Type	Status
Unit 5	May 1969	569 MW	Steam Turbine	Subbituminous Coal	Operating
Unit 6	June 1997	170 MW	Combustion Turbine	Natural Gas	Operating
Unit 7	May 2000	82.2 MW	Gas Turbine	Natural Gas	Operating
Unit 8	July 2000	82.2 MW	Gas Turbine	Natural Gas	Operating
Unit 9	July 2000	142.8 MW	Combined Cycle (steam)	Natural Gas	Operating

Total nameplate capacity: 1,046.2 MW (EIA-verified)

Source: U.S. Energy Information Administration, Form EIA-860 Annual Electric Generator Report — EIA Plant Code 2079

Alleged Equipment Manufacturers

Unit 5 (569 MW, originally online May 1969, subsequently rebuilt as Unit 5R) is alleged, based on North American powerhouse database records for the 5R reconstruction, to have been equipped with a Babcock & Wilcox boiler system and a General Electric TC4F26 steam turbine-generator set. Earlier retired units (Units 1–3, 1951–1953) were constructed during the peak decades of asbestos use in American industrial construction. Babcock & Wilcox, Combustion Engineering, General Electric, and Westinghouse components manufactured during these periods have each been alleged in publicly filed asbestos litigation to incorporate asbestos-containing refractory, insulation, gaskets, packing, and turbine casing materials.

Missouri’s Five-Year Filing Deadline

Many Hawthorn workers assume the five-year clock started running when they were exposed to asbestos decades ago. It did not. Under § 516.120 RSMo, the Missouri asbestos filing deadline runs from the date of your medical diagnosis of mesothelioma, lung cancer, or asbestosis — not from the date of exposure. If you were diagnosed recently, your window is open — but it is already running.

Don’t wait. Call a Missouri asbestos attorney today.

Who Was Exposed: The Trades at Hawthorn

Asbestos exposure at Missouri power plants was not confined to one trade or one department. Multiple skilled trades worked in close proximity to asbestos-containing materials throughout their careers.

Insulators (Asbestos Workers)

Insulators — members of Heat and Frost Insulators Local 1, which dispatched members to Hawthorn throughout the construction and maintenance era — faced the most direct, concentrated exposure of any trade at the facility. Their craft, for most of the twentieth century, was built around applying and removing asbestos-containing insulation. They applied Johns-Manville Thermobestos and Owens-Illinois Kaylo pipe covering to steam and feedwater lines. They cut Eagle-Picher Superex insulation blocks with hand saws — operations that generated dense clouds of asbestos dust. They mixed asbestos-containing insulating cement by hand.

Local 1 members dispatched to Hawthorn during the 1950s, 1960s, and 1970s may have been exposed to asbestos at concentrations among the highest recorded in industrial settings. Many of those same members worked across the Mississippi River corridor — at Labadie, Portage des Sioux, and Illinois facilities including Granite City Steel — under the same product lines, the same manufacturers, the same concealment.

If you are a retired Local 1 member diagnosed with mesothelioma or another asbestos-related disease, the Missouri filing deadline is running right now. Co-workers who could confirm your exposures are in their 70s and 80s. An experienced Missouri asbestos attorney can begin preserving that testimony through early depositions — but only if you act now.

Pipefitters and Steamfitters

Pipefitters — members of UA Local 562 and the Kansas City-area pipefitting locals — wrapped hot pipes in Johns-Manville Thermobestos and Owens-Illinois Kaylo and worked directly on steam systems throughout the plant. Every valve replacement, every flange repair, every pipe modification required disturbing the asbestos insulation already in place. When pipefitters broke out a flanged joint or cut a section of insulated pipe, the surrounding air filled with fibers. They breathed that air for entire shifts, year after year.

Crane Co. valves with Cranite asbestos gaskets were standard equipment throughout Hawthorn’s steam systems. Replacing a Crane valve meant cutting out the old Cranite packing, exposing the fibers packed into the valve body, and fitting new gasket material — often also asbestos-containing. Pipefitters did this work hundreds of times over the course of a career.

Pipefitters and steamfitters who worked at Hawthorn and have been diagnosed with mesothelioma or lung cancer should contact a Missouri asbestos attorney immediately to evaluate their claim.

Recent Developments

Decommissioning and Demolition Activity

Hawthorn Unit 5, the facility’s primary coal-fired generating unit, was retired from commercial operation following years of discussion about compliance costs associated with federal environmental regulations, including the EPA’s Mercury and Air Toxics Standards (MATS). The retirement and subsequent decommissioning of aging coal-fired generating units triggers mandatory compliance with EPA NESHAP regulations under 40 CFR Part 61, Subpart M, which requires a thorough asbestos inspection prior to any demolition or renovation activity and formal notification to state and federal regulators before asbestos-containing materials are disturbed.

Regulatory Landscape

Facilities of Hawthorn’s era — constructed and expanded during the mid-twentieth century when asbestos use in power generation was standard practice — are subject to OSHA’s asbestos construction standard at 29 CFR 1926.1101 whenever maintenance, renovation, or demolition work disturbs insulation, gaskets, packing materials, or fireproofing.

Litigation Note

No facility-specific verdict or settlement information naming Hawthorn Generating Station as a location of record has been identified in publicly available court databases at the time of this writing. Asbestos claims arising from this site are typically filed against product manufacturers, insulation contractors, or other responsible parties rather than the utility itself.

Litigation Landscape

Hawthorn Generating Station workers who handled or were exposed to asbestos-containing insulation, gaskets, and pipe wrapping have potential claims against multiple manufacturers whose products were installed and used at coal-fired power plants during the facility’s operational decades. Primary defendants in documented asbestos cases arising from power plant settings include Johns-Manville, Combustion Engineering, Babcock & Wilcox, Crane Co., Armstrong Industries, Garlock, and W.R. Grace. These companies supplied boiler insulation, turbine casings, valve packing, and piping materials widely used in power generation facilities.

Workers diagnosed with mesothelioma, asbestosis, or related conditions may pursue compensation through multiple asbestos bankruptcy trust funds established by these manufacturers following insolvency. The Johns-Manville Settlement Trust, Combustion Engineering Asbestos Trust, Babcock & Wilcox Trust, and Crane Co. Asbestos Trust are among the most relevant for power plant exposure claims. Trust claims can be filed alongside or independent of personal injury litigation, and many exposed workers qualify for compensation from multiple trusts based on the variety of asbestos products present in power plant environments.

Publicly filed litigation arising from coal-fired and gas-fired power plant asbestos exposure has documented occupational exposure pathways similar to those at Hawthorn, involving insulation workers, operators, maintenance personnel, and support staff. The latency period for asbestos-related diseases—often 20 to 50 years after exposure—means former Hawthorn employees should consider medical screening and legal consultation even if exposure occurred decades ago.

If you worked at Hawthorn Generating Station and have been diagnosed with mesothelioma or asbestos-related disease, contact an experienced Missouri asbestos attorney to discuss your eligibility for trust fund claims and litigation options.

Missouri DNR Asbestos Notification Records

No NESHAP asbestos abatement records have been located in Missouri DNR public records specifically naming Hawthorn Generating Station at the Kansas City address. NESHAP records filed by Kansas City Power & Light Company for Missouri asbestos work are documented under the Montrose Generating Station in Clinton, Henry County, Missouri — a separate KCPL facility. Hawthorn-specific notifications, if filed, may appear under the Evergy or KCPL entity at the Kansas City plant address.

Workers seeking regulatory documentation of asbestos-containing materials at KCPL-operated Missouri facilities should reference the Montrose Generating Station page for documented MDNR NESHAP records, or contact the Missouri Department of Natural Resources directly:

Missouri DNR, Air Pollution Control Program PO Box 176, Jefferson City, MO 65102 (573) 751-4817

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