About Asbestos Exposure at Theda Clark Medical Center — Neenah, Wisconsin: Workers' Legal Guide
Large hospitals constructed or expanded during the mid-twentieth century ran on steam. Central boiler plants generated high-pressure steam distributed through miles of piping to heat patient wings, sterilize surgical equipment, run laundry and dishwashing facilities, and drive absorption cooling systems.
Every valve, flange, elbow, and pipe length in those systems required insulation rated for sustained high-temperature service. For most of the twentieth century, that insulation meant asbestos.
Theda Clark was an industrial operation wearing a medical building’s exterior. For the tradesmen who built, maintained, and renovated this facility over four decades, asbestos exposure Wisconsin was not an occasional hazard — it was a daily occupational reality.
The Fox Valley region’s workforce in this era drew heavily from skilled trades with deep Wisconsin union roots. Members of Boilermakers Local 107, Pipefitters Local 601, Asbestos Workers Local 19, and IBEW Local 494 reportedly worked at Theda Clark and at the region’s major industrial sites interchangeably — carrying exposure histories that spanned hospitals, factories, and power facilities across northeastern Wisconsin.
Central Boiler Plant and High-Temperature Asbestos Insulation
The boiler room was among the most hazardous environments a tradesman could enter at Theda Clark. Boilers manufactured by companies including, and were reportedly insulated with high-temperature asbestos block and blanket products. Steam distribution lines running through boiler rooms, mechanical rooms, and pipe chases throughout the hospital were reportedly covered with:
- Thermobestos** pipe insulation and block products
- calcium silicate pipe insulation** rigid insulation systems
HVAC Systems and Secondary Asbestos Exposure Pathways
HVAC systems created additional hazard. Ductwork in hospitals of this era was frequently wrapped with asbestos-containing materials at joints and connections. Tradesmen working in ceiling plenums, mechanical rooms, and pipe chases may have encountered:
- asbestos cloth tape at ductwork seams
- pipe insulation** duct insulation on main trunk lines and branch runs
- Vibration dampeners incorporating asbestos at equipment mounting points
- gaskets and packing and seals rated for high-temperature service
- Air handler gaskets fabricated from asbestos-reinforced packing materials
General Equipment at Asbestos Exposure at Theda Clark Medical Center — Neenah, Wisconsin: Workers' Legal Guide
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 — Wisconsin
The records below are verified, state-documented asbestos removals at this facility. Each entry represents a regulated abatement project where the Wisconsin Department of Natural Resources (Wisconsin 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 Wisconsin 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 Asbestos Exposure at Theda Clark Medical Center — Neenah, Wisconsin: Workers' Legal Guide
No single trade worked in isolation at Theda Clark. Asbestos exposure was a shared hazard across multiple skilled crafts — and for many Wisconsin tradesmen, Theda Clark was one stop among many in a career that spanned hospitals, power plants, and heavy industry throughout the state.
Boilermakers and Central Plant Exposure
Boilermakers who installed, inspected, and repaired the hospital’s central plant equipment are alleged to have experienced direct contact with high-temperature asbestos insulation during virtually every job. Boilermakers Local 107 members dispatched to Theda Clark may have been exposed when:
- Removing and replacing and calcium silicate pipe insulation** boiler insulation
- Inspecting or boiler insulation condition
- Repairing boiler tubes surrounded by asbestos block insulation
- Installing new boilers from manufacturers that specified asbestos insulation as standard equipment
Many of the same Local 107 members reportedly worked at Allis-Chalmers in West Allis and Falk Corporation in Milwaukee during the same decades, where identical boiler systems insulated with identical products were in continuous service.
Pipefitters, Steamfitters, and Distribution System Asbestos
Pipefitters and steamfitters who ran new steam lines, repaired distribution systems, and replaced valves and fittings are alleged to have disturbed Thermobestos**, calcium silicate pipe insulation**, and asbestos pipe covering on a routine basis — both their own installations and legacy insulation left by previous contractors. Pipefitters Local 601 members dispatched to Theda Clark may have been exposed when:
- Cutting and fitting Thermobestos pipe insulation
- Removing calcium silicate pipe insulation at connections and flanges
- Repairing steam lines with deteriorating insulation
- Installing asbestos-wrapped distribution branches
- Working with gaskets and packing asbestos-reinforced valve packing and gaskets
The same Local 601 members who reportedly serviced steam systems at Theda Clark were routinely dispatched to A.O. Smith’s Milwaukee facilities and to Allen-Bradley’s complex — sites where Thermobestos and calcium silicate pipe insulation were also in widespread documented use.
Heat and Frost Insulators: The Highest-Exposure Trade
Heat and frost insulators faced the heaviest exposures of any trade at Theda Clark. Asbestos Workers Local 19 members whose work history included Theda Clark are alleged to have experienced some of the highest cumulative fiber doses of any Wisconsin tradesman. Their work included:
- Sawing and cutting Thermobestos** pipe covering to length at the job site, generating dense airborne fiber clouds with every cut
- Applying calcium silicate pipe insulation** block insulation to boiler shells and steam headers
Wisconsin — Filing Deadline & Next Steps
Wisconsin law gives mesothelioma and asbestos-disease claimants 3 years from the date of medical diagnosis to file a personal-injury lawsuit (Wis. Stat. § 893.54). For wrongful-death claims after an asbestos-related death, the filing window is 3 years from the date of death (Wis. Stat. § 893.54). 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 Wisconsin 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 — Wisconsin
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
Many of the same tradesmen who worked at Theda Clark rotated through other major asbestos exposure Wisconsin sites — including Allen-Bradley in Milwaukee, Allis-Chalmers in West Allis, Falk Corporation in Milwaukee, and A.O. Smith in Milwaukee — where the same asbestos-containing products from the same manufacturers were in daily use.Data Sources — Wisconsin
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)
- Wisconsin 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.