About Zimmer Generating Station | Moscow
The William H. Zimmer Generating Station sits at 1781 Newtonsville Road, Moscow, Ohio 45153, in Clermont County, approximately 25 miles southeast of Cincinnati on the Ohio River. While located in Ohio, the facility is critically relevant to Missouri and Illinois workers for one reason: large power plant construction and major maintenance outages drew union tradespeople from across the Ohio Valley and the entire Mississippi River industrial corridor, including St. Louis-area locals whose members routinely traveled to major jobs throughout the region.
In the early 1970s, three Ohio utilities — Cincinnati Gas & Electric (CG&E), Columbus Southern Power, and Dayton Power and Light — began joint construction of a nuclear generating station at the Zimmer site. The project spanned more than a decade and drew allegations of construction defects, falsified inspection records, and regulatory disputes with the Nuclear Regulatory Commission (NRC). Hundreds of construction workers labored on-site for extended periods. During this phase, asbestos-containing materials were allegedly installed as standard practice in nuclear facility construction.
In 1984, the facility’s owners abandoned the nuclear project and converted the partially completed structure into a coal-fired generating station — one of the most expensive power plant conversions in U.S. history. This conversion phase created a particularly hazardous window for potential asbestos exposure. Workers may have been removing legacy asbestos-containing materials from the nuclear construction phase at the same time new asbestos-containing materials were being installed for coal operations.
Zimmer came online as a 1,300-megawatt coal-fired generating station in 1991, making it one of Ohio’s largest coal-burning units. Operational ownership timeline: Cincinnati Gas & Electric (CG&E) — original owner through early operations; PSI Energy / Cinergy Corp. — following utility mergers in the 1990s; Duke Energy Ohio — following the Duke Energy/Cinergy merger in 2006; Dynegy Inc. (identified as Dynegy W.H. Zimmer in regulatory databases) — acquired commercial generation assets in 2015. For three decades of coal operations, plant employees and contractor workers performed continuous maintenance, repairs, and overhauls that may have disturbed legacy asbestos-containing materials installed decades earlier.
Zimmer was eventually retired from commercial operation under mounting regulatory pressure. Decommissioning activities may have involved removal of asbestos-containing materials subject to federal National Emissions Standards for Hazardous Air Pollutants (NESHAP) regulations governing asbestos demolition and renovation work.
General Equipment at Zimmer Generating Station | Moscow
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
The records below are verified, state-documented asbestos removals at this facility. Each entry represents a regulated abatement project where the Ohio Environmental Protection Agency (Ohio EPA) 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.
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 Zimmer Generating Station | Moscow
Tradespeople dispatched by Missouri and Illinois locals — including members of Heat and Frost Insulators Local 1, UA Local 562, and Boilermakers Local 27 — may have been among the workers potentially exposed to asbestos-containing materials during nuclear construction. These same unions supplied workers to Missouri’s Labadie Energy Center and Portage des Sioux Power Plant, creating a regional network of workers who moved between major industrial projects throughout their careers.
Asbestos fibers become airborne when materials are cut, sawed, drilled, abraded, scraped, or removed. Power plant workers routinely performed exactly these tasks: Insulators applying and removing pipe insulation during maintenance and replacement; Boilermakers cutting gaskets and refractory materials; Pipefitters breaking flanged joints and replacing asbestos-containing gaskets; Electricians drilling through fireproofing materials; Maintenance workers scraping and cleaning equipment. These routine operations generated airborne asbestos fiber concentrations that workers breathed directly into their lungs.
Critical Filing Deadline & Next Steps
Ohio law gives mesothelioma and asbestos-disease claimants 2 years from the date of medical diagnosis to file a personal-injury lawsuit (ORC § 2305.10). For wrongful-death claims after an asbestos-related death, the filing window is 2 years from the date of death (ORC § 2125.02). 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 Ohio 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.
Cross-State & Regional Corridor Workers
Zimmer drew workers from across the Ohio Valley and the broader Mississippi River industrial corridor — including tradespeople from Missouri and southwestern Illinois who regularly traveled to large power plant construction and outage projects. Members of Heat and Frost Insulators Local 1 (St. Louis), UA Local 562 (pipefitters, St. Louis), and Boilermakers Local 27 (St. Louis) may have worked at or traveled to Zimmer during major construction phases, conversion work, or scheduled outages.
Workers from facilities along Missouri’s Mississippi River shoreline — including Labadie Energy Center, Portage des Sioux Power Plant, Monsanto facilities in the St. Louis area, and workers with experience at Granite City Steel across the river in Illinois — were part of the same regional trade labor pool that supplied large Ohio Valley power plant projects.
Data Sources
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)
- Ohio Environmental Protection Agency 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.