Why Indiana Was a Major Center for Industrial Asbestos Exposure

Indiana’s industrial legacy is anchored by one of the most asbestos-intensive concentrations of heavy industry in North America. The northwest corner of the state — Gary, Hammond, East Chicago, and Whiting — housed the largest integrated steel complex in the Western Hemisphere and one of the country’s largest oil refineries, operating simultaneously within a few miles of each other. Workers who built and maintained these facilities were exposed to asbestos-containing insulation, refractory, gaskets, and packing materials throughout careers that often spanned three or four decades.

The Gary steel corridor alone employed tens of thousands of workers — insulators, pipefitters, boilermakers, millwrights, electricians, and operating engineers — who worked year-round in the most asbestos-intensive environment in Indiana. U.S. Steel Gary Works, Inland Steel Indiana Harbor, Bethlehem Steel Burns Harbor, and LTV Steel were all running full production from the 1940s through the 1980s, during which every pressure vessel, every boiler, every mile of high-temperature process pipe was insulated with products containing chrysotile, amosite, or crocidolite asbestos.

Indiana’s industrial infrastructure developed in concentrated corridors:

  • The Northwest Indiana Steel Belt — Gary, East Chicago, Hammond, Whiting, and Portage; the U.S. Steel Gary Works (the largest steel plant in North America), Inland Steel Indiana Harbor, Bethlehem Steel Burns Harbor, and LTV Steel, plus the BP Whiting Refinery and multiple chemical facilities
  • Central Indiana manufacturing — Indianapolis and its suburbs; Eli Lilly, Allison Gas Turbine/GM, Western Electric Hawthorne (workers dispatched), Chrysler Indiana Transmission, and dozens of foundry and fabrication operations
  • Coal-fired power generation — AES Petersburg, Cayuga Generating Station, Wabash River Generating Station, NIPSCO Michigan City, Merom Station, and Rockport Plant stretching across the coal belt from the Wabash River to the Ohio
  • Southwest Indiana industrial — Alcoa Warrick Operations (aluminum smelting), SIGECO Culley Station, and the Ohio River industrial corridor through Evansville and Vanderburgh County

Indiana’s strong building trades tradition meant organized labor was present at every major construction and maintenance project. Union hall records, pension fund hour records, and membership rolls from Indiana’s building trades locals provide one of the most complete exposure documentation trails available — records that worksite history specialists regularly use to reconstruct exposure histories from 40, 50, and 60 years ago.

Power Generation

Indiana’s coal-fired power generation sector was among the most asbestos-intensive industries in the state. Every boiler, every turbine, every mile of high-pressure steam pipe had to be insulated against temperatures and pressures that demanded the most heat-resistant materials available. From the 1930s through the 1980s, that meant asbestos — specifically Johns-Manville Thermobestos, Owens Corning Kaylo, Philip Carey Magnesia, Eagle-Picher Superex, and Armstrong World Industries Unibestos.

Major Indiana power generation facilities with documented asbestos histories include AES Petersburg Generating Station, Cayuga Generating Station (Vermilion County), Duke Energy Wabash River Generating Station (Terre Haute), NIPSCO Michigan City Generating Station, Hoosier Energy Merom Station (Sullivan County), AES Rockport Plant, SIGECO Culley Station (Warrick County), and the NIPSCO Bailly Generating Station near Chesterton.

Indiana — documented power generation sites View Full Interactive Map →

Industrial, Chemical & Refinery Sites

Northwest Indiana’s steel and refinery corridor was one of the most concentrated asbestos worksites in North America. U.S. Steel Gary Works, Inland Steel Indiana Harbor Works, Bethlehem Steel Burns Harbor, and LTV Steel operated simultaneously within a 15-mile stretch of Lake County and Porter County. The BP Whiting Refinery — one of the largest inland oil refineries in the United States — operated continuous refining operations that required asbestos-insulated process pipe, heat exchangers, and reactors throughout the same period. Workers who crossed between steel and refinery jobs, or who were dispatched by union halls to multiple Lake County sites, accumulated exposures at many facilities across their careers.

Northwest Indiana — steel & refinery corridor View Full Interactive Map →

Phenolic Resin & Plastics Manufacturing

Phenolic resin and thermoset plastics manufacturing is a distinct asbestos exposure pathway. At these facilities, asbestos was not applied around pipes as insulation — it was blended directly into every batch of molding compound as a reinforcing filler, at concentrations of up to 5–10% by weight. Workers who loaded compound into press hoppers, trimmed flash from finished parts, and ran tumbling and deflashing machines inhaled asbestos fibers released from the compound itself throughout every production run. Military specification MIL-M-14 mandated asbestos-filled phenolic compounds for defense procurement through the mid-1970s. The principal defendants in these cases are the compound manufacturers — Union Carbide/Bakelite, Durez/Hooker Chemical, Monsanto Resinox, Rogers Corporation, and Plenco — in addition to the facility operator.

Indiana phenolic resin and electrical manufacturing facilities include Rostone Corporation in Lafayette (Rosite phenolic compound manufacturer and molder), Delco Remy in Anderson (Durez crocidolite compound used in armature components), Belden Manufacturing in Richmond (asbestos-insulated wire and cable), and Allen-Bradley/Rockwell Automation facilities throughout the state (asbestos-compound circuit breakers and motor starters). Additional suppliers with documented exposure at Indiana industrial and utility facilities include Haveg Industries (50% anthophyllite phenolic pipe used at Indiana steel mills and chemical plants) and Johns-Manville (pipe and block insulation at every major Indiana industrial site).

Indiana — phenolic resin & electrical manufacturing View Full Interactive Map →

The Illinois and Ohio Border Corridor

Indiana workers did not stop working at the state line. The Illinois border region — Chicago’s Southeast Side, Calumet City, Hammond — is part of the same industrial corridor as Northwest Indiana. Workers from Gary and Hammond union halls pulled shifts at Chicago-area facilities throughout their careers. The following border-region sites have documented asbestos histories and frequently appear in Indiana plaintiff exposure histories:

  • Republic Steel South Chicago — Chicago, Cook County, IL
  • Wisconsin Steel (Interlake) — Chicago, Cook County, IL
  • U.S. Steel South Works — Chicago, Cook County, IL
  • Standard Oil Whiting (Chicago end) — Calumet City, Cook County, IL
  • Pullman Standard — Chicago, Cook County, IL

On the Ohio border, Fort Wayne workers frequently worked alongside Ohio facilities:

  • Toledo Edison Davis-Besse Nuclear Plant — near Toledo, Wood County, OH
  • Ohio Edison Bruce Mansfield Plant — Shippingport, Beaver County, PA
  • Lima Refinery (BP/Amoco) — Lima, Allen County, OH

Important for Indiana residents with Illinois or Ohio exposure: Where exposure occurred at a facility in another state, that state’s law governs that claim — including its statute of limitations. Indiana workers can and do have claims under multiple states’ laws simultaneously, depending on where exposure occurred. A complete exposure history review is essential to ensure claims in all relevant jurisdictions are properly evaluated.

All Exposed Trades

Every skilled trade that operated in and around heavy industrial facilities carried asbestos exposure risk. The following trades all have documented asbestos disease histories in Indiana.

Primary exposure — direct daily contact with asbestos-containing materials:

  • Heat and Frost Insulators (Local 18, Indianapolis; Local 22, Fort Wayne; Local 47, Gary/Northwest Indiana) — direct application, removal, and maintenance of pipe and equipment insulation; highest fiber counts of any trade
  • Pipefitters and Steamfitters (UA Local 440, Indianapolis; UA Local 166, Gary; UA Local 172, South Bend) — cut and disturbed insulation during installation and maintenance of piping systems
  • Boilermakers (Local 191, Indianapolis; Local 374, Gary/Hammond) — boiler assembly, repair, and tear-out; intensive refractory and gasket exposure
  • Plumbers — pipe installation in buildings with asbestos-containing cements and joint compound

Secondary exposure — regular proximity to asbestos work:

  • Electricians (IBEW Local 481, Indianapolis; IBEW Local 697, Gary) — ran conduit and wire through the same mechanical spaces where insulators and pipefitters worked
  • Sheet Metal Workers (Local 20, Indianapolis; Local 268, Gary) — duct installation adjacent to insulated pipe runs; asbestos-containing duct lining
  • Iron Workers and Structural Steel Workers — fireproofing spray applied to structural steel they erected
  • Millwrights (Local 1076, Hammond) — machinery installation and maintenance in heavily insulated mechanical rooms
  • Operating Engineers (Local 150, Gary/Northwest Indiana; Local 103, Indianapolis) — worked heavy equipment in areas where asbestos was being applied or removed

Bystander and construction trades exposure:

  • Carpenters — finish work in buildings with asbestos floor tile, ceiling tile, and joint compound
  • Drywall Workers and Plasterers — asbestos-containing joint compound mixed and sanded in enclosed spaces
  • Tile Setters and Floor Layers — asbestos vinyl floor tile cut and scored daily
  • Painters — sanded and prepared surfaces containing asbestos-based textured coatings
  • Bricklayers and Masons — worked with asbestos-containing refractory brick and mortar in industrial furnaces and boilers
  • Laborers — present across all trades; swept up asbestos debris, moved materials, assisted with tearout
  • Roofers — asbestos-containing roofing felt, shingles, and mastic
  • Machinists — asbestos gaskets cut to fit, asbestos brake and clutch linings machined in shops

Industrial and utility trades:

  • Steel Mill Workers — blast furnace operators, crane operators, maintenance workers throughout Gary’s steel complex; among the highest-volume asbestos environments in Indiana
  • Power Plant Operators — spent careers in facilities with asbestos pipe systems throughout; disturbed during operation and maintenance
  • Railroad Workers (Indiana Rail Road, CSX, Norfolk Southern, former Penn Central/Conrail lines) — locomotive insulation, station buildings, shop facilities all heavily asbestos-insulated
  • Auto Mechanics — brake and clutch lining, gaskets; Chrysler, Ford, and GM assembly workers in Indiana plants

Military and shipyard:

  • Navy Veterans — U.S. Navy ships were among the most heavily asbestos-insulated environments ever built; every engine room and boiler room was lined with asbestos; veterans have specific VA benefit pathways in addition to civil claims
  • Army Corps of Engineers and inland waterway workers — Indiana’s Ohio and Wabash River facilities used asbestos in locks, powerhouses, and maintenance operations

Secondary and Household Exposure — Wives and Children

Asbestos did not stay at the jobsite. Workers carried it home on their clothes, hair, skin, and work boots every day.

Take-home exposure — also called secondary or household exposure — has been documented in medical literature for decades. Family members of asbestos workers developed mesothelioma without ever setting foot on an industrial site. The mechanisms are direct:

  • Laundering work clothes — wives who shook out, sorted, and washed asbestos-laden work clothing were exposed to fiber releases equivalent to those experienced in some work environments
  • Physical contact at the end of the workday — embracing a husband or father who had worked with asbestos without changing out of work clothes transferred fibers to family members
  • Contaminated vehicles — fibers carried into family cars became embedded in upholstery and floor mats, creating ongoing exposure for everyone who rode in those vehicles
  • Children playing near work areas — in households where work equipment or clothing was stored, children playing nearby were exposed

Secondary exposure claims are legally distinct from workers’ claims but are equally recognized under Indiana law. A spouse or child of a worker who developed mesothelioma as a result of household exposure has an independent legal claim against the manufacturers of the asbestos-containing products that caused the family member’s exposure.

Documenting Exposure When the Jobsite Was 40 or 50 Years Ago

Many workers and families feel discouraged from pursuing claims because they cannot fully remember every jobsite, every employer, or every product from decades past. This is expected, not disqualifying. Worksite history reconstruction is an established practice in asbestos litigation, and there are specialists whose work is specifically building that record.

Sources used to reconstruct exposure histories include:

  • Union pension fund hour records — most Indiana building trades locals maintained hour records by employer and year; Local 18, Local 440, Local 191, and Local 150 records can identify exactly which facilities a member worked at and for how long
  • Social Security earnings records — employer-by-employer income records maintained by the SSA document a complete work history
  • OSHA inspection records and citations — federal inspection records document products found at specific facilities during specific periods
  • FERC power plant filings — maintenance and capital expenditure records document equipment in place at power generation sites
  • Publicly filed depositions — co-workers who testified in prior asbestos cases frequently described the products they saw used at specific facilities; this testimony is in the public court record
  • Union hall archives and newsletters — jobsite assignments, safety committee records, and membership publications document which members worked where
  • Historical photographs — industrial photography archives at institutions including the Indiana State Library, Indiana Historical Society, the Calumet Regional Archives at Indiana University Northwest, and the Gary Public Library contain photographs of Indiana industrial facilities that document working conditions and materials

Old photographs, a pay stub from a single employer, a pension statement, or a union membership card from decades ago can be the starting point for a full exposure history reconstruction. Incomplete memory is not a barrier to filing — it is where the reconstruction work begins.

Products, equipment, and companies referenced throughout this site are drawn from public asbestos litigation records, court filings, EPA and OSHA regulatory databases, FERC filings, and publicly available industry documentation. Where specific products are identified at specific facilities, that identification reflects what fellow tradesmen at those jobsites have alleged in publicly available depositions or what has been documented in publicly filed regulatory and litigation records. These references do not constitute independent findings of liability against any company, and this site does not adopt third-party allegations as established fact. All product identifications are attributed to their source public records.

This website is published by Rights Watch Media Group LLC, an independent media organization that publishes authoritative public domain information resources for Indiana residents.