About Iowa
Overview and Operating History
The Iowa Southern Utilities Keokuk Generating Station sat along the Mississippi River in Keokuk, Iowa — Lee County, southeastern corner of the state. Iowa Southern Utilities — later reorganized through a series of utility mergers that eventually folded operations into MidAmerican Energy Holdings — operated the Keokuk facility as a coal-fired steam generating station for decades during the mid-to-late twentieth century.
The Keokuk Generating Station was one of several coal-fired utility facilities in Iowa that reportedly relied heavily on asbestos-containing materials during the peak decades of plant construction and operation. Other Iowa utility and industrial facilities where workers may have encountered comparable asbestos-containing materials include Iowa Steel (Iowa City), Quaker Oats (Cedar Rapids), Rockwell Collins (Cedar Rapids), and John Morrell & Co. (Sioux City) — facilities where Iowa workers in the same trades and union locals may have accumulated significant asbestos exposure during overlapping employment periods.
Why Coal-Fired Plants Required Massive Quantities of Asbestos-Containing Materials
Coal-fired steam generating stations are thermally intensive industrial environments. They required large quantities of insulating materials to maintain operating temperatures in:
- Boilers
- Turbines
- Feedwater heaters
- Condensers
- Steam lines and associated mechanical systems
From roughly the 1930s through the late 1970s, and in some cases into the early 1980s, the industry standard was to insulate these systems with asbestos-containing materials (ACMs) supplied by manufacturers Corporation.
Steam boilers at coal-fired plants operate at temperatures exceeding 1,000 degrees Fahrenheit. Every linear foot of steam piping, every valve, every turbine casing required thermal management. Through most of the twentieth century, asbestos-containing materials were the insulation of choice for high-temperature industrial applications because they were:
- Extremely resistant to heat and fire
- Inexpensive and widely available
- Easy to work with in block, pipe covering, blanket, and cement forms
- Durable under conditions of vibration and thermal cycling
Manufacturers marketed asbestos-containing insulation, gaskets, packing, and refractory products to utilities across Iowa and the upper Midwest, including facilities comparable to Keokuk.
General Equipment at Iowa
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.
Documented Asbestos Evidence — Iowa
The records below are verified, state-documented asbestos removals at this facility. Each entry represents a regulated abatement project where the Iowa Department of Natural Resources (Iowa 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 Iowa 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:
Who May Have Been Exposed at Iowa
Asbestos-Containing Products Reportedly Present at the Facility
Based on the types of equipment installed at coal-fired steam generating stations of comparable vintage in Iowa and the upper Midwest, workers at the Keokuk Generating Station may have encountered the following categories of asbestos-containing materials:
Block Insulation and Pipe Covering
Corporation** and were dominant national suppliers of industrial block insulation and pipe covering during the peak years of power plant construction and operation. Workers at the Keokuk facility are alleged to have worked alongside asbestos-containing products bearing these manufacturers’ names on:
- Steam lines
- Boiler shells
- Associated piping systems
Block insulation — rigid sections of calcium silicate or magnesia block, often containing high percentages of asbestos fiber — was applied to high-temperature boiler surfaces and steam headers. Pipe covering products of similar composition were fitted around steam and condensate return lines throughout the plant. block insulation and pipe covering materials were industry standards at comparable Iowa and Midwest power facilities during this era.
When workers cut, sawed, broke, or removed block insulation or pipe covering for maintenance access, the work allegedly released clouds of respirable asbestos dust. Workers in the immediate area — and workers in adjacent areas of the plant — may have inhaled those fibers without adequate protection.
Boilers and Equipment
, Inc.** (CE) was a premier manufacturer of utility boilers and related combustion equipment in the United States, supplying equipment to hundreds of coal-fired power plants including facilities in Iowa and the upper Midwest comparable to Keokuk. boilers reportedly incorporated asbestos-containing materials in:
- Refractory linings and furnace insulation
- Boiler casing insulation
- Gaskets and expansion joint packing
- Door seals and inspection port coverings
Workers who maintained, repaired, or worked near boilers — particularly during outages when boiler internals were accessed — may have been exposed to asbestos-containing materials associated with that equipment.
Steam Turbines and Turbine Insulation
Large steam turbines required asbestos-containing insulation on:
- Casing surfaces
- Steam admission components
- Associated high-pressure piping
Turbine manufacturers including General Electric reportedly incorporated asbestos-containing insulation and gasket materials as standard equipment in turbines supplied to Iowa coal-fired facilities. Turbine outages — during which workers opened turbine casings, pulled gaskets, and disturbed insulation — were among the highest-risk activities for asbestos fiber release. Workers who participated in turbine overhauls and maintenance at the Keokuk Generating Station may have been exposed to asbestos-containing materials during these activities.
Feedwater Heaters
Feedwater heaters preheat water returning to the boiler, improving thermal efficiency. These pressure vessels and their associated piping systems were heavily insulated with asbestos-containing materials reportedly supplied by and during the facility’s operating era. Maintenance work on feedwater heaters — including opening the equipment for tube cleaning or repair — may have disturbed asbestos-containing insulation and released fibers into the breathing zone of workers in the area.
Gaskets, Packing, and High-Temperature Sealants
gaskets and packing and Industries**, among others, manufactured and supplied asbestos-containing gaskets and packing materials for use throughout coal-fired power plants. These products were reportedly used on:
- Valve stems and flanged connections
- Pump seals
- Manhole covers and inspection ports
- High-temperature equipment seals
When workers pulled valve gaskets during routine maintenance, removed packing from pump shafts, or broke and re-sealed high-temperature joints, they may have been exposed to asbestos fibers contained in these products.
Boiler Rope, Refractory Cement, and Maintenance Materials
manufactured asbestos-containing boiler rope and refractory cement products used in power plant maintenance and repair. These materials are alleged to have been used for:
- Sealing gaps in boiler casings
- Thermal gap-filling applications
- Maintenance repairs requiring high-temperature-rated materials
Disturbing these materials during repair work may have exposed workers to asbestos fibers.
Insulation Products and Trade Names
Workers at the Keokuk Generating Station may have been exposed to asbestos-containing products bearing trade names including:
- calcium silicate pipe insulation ( block insulation)
- Thermobestos (thermal insulation products)
- pipe insulation (pipe and equipment insulation)
- spray-applied fireproofing (fireproofing and insulation spray)
- Gold Bond and wallboard (building materials containing asbestos reportedly used in administrative areas and control rooms)
Additional ACM Sources Throughout the Plant
Beyond the major systems above, coal-fired power plants of this era typically contained asbestos-containing materials in:
- Electrical insulation on wiring, switchgear, and panels supplied by General Electric and other equipment manufacturers
- Floor tiles and ceiling tiles in control rooms and administrative areas, reportedly supplied by manufacturers including and others
- Asbestos-containing gloves and thermal blankets used by maintenance workers
- Gasket sheets and packing materials stocked in plant maintenance shops
Iowa — Filing Deadline & Next Steps
Iowa law gives mesothelioma and asbestos-disease claimants 2 years from the date of medical diagnosis to file a personal-injury lawsuit (Iowa Code § 614.1(2A)). For wrongful-death claims after an asbestos-related death, the filing window is 2 years from the date of death (Iowa Code § 614.1(2)). 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
- 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.
- Preserve medical records. Pathology reports, biopsy results, imaging, and pulmonary-function tests are central to both civil claims and trust-fund filings.
- 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.
- Speak with an asbestos attorney with Iowa 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 — Iowa
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 — Iowa
Information about facility equipment, industrial materials, and occupational records referenced on this page is drawn from publicly available sources where applicable, including:
- EPA ECHO Facility Compliance Database — enforcement and compliance records for industrial facilities
- OSHA Establishment Search — federal workplace inspection history
- EIA Form 860 Plant Data — power-plant equipment and ownership records (where applicable)
- Iowa Department of Natural Resources NESHAP asbestos abatement notification records
- Published asbestos trial and trust fund records (publicly filed court documents)
- AsbestosIndex Product & Manufacturer Crosswalk — historical asbestos-containing product schedules linked to manufacturers
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.