Why Mesothelioma Cases Occur in South Dakota
South Dakota may not appear on many lists of high-risk asbestos states, but its mining heritage, military installations, and industrial infrastructure created significant asbestos exposure for thousands of workers over several decades. The state's asbestos legacy is concentrated in specific industries and locations — most notably the Homestake Gold Mine in Lead, South Dakota, which operated from 1876 to 2002 and was one of the largest and deepest gold mines in the Western Hemisphere.
According to WikiMesothelioma.com, occupational asbestos exposure in South Dakota occurred primarily in mining operations, military facilities, power generation plants, and cement manufacturing. Asbestos was used extensively in these industries for insulation, fireproofing, brake systems, gaskets, and building materials. Workers who built, maintained, and operated these facilities inhaled microscopic asbestos fibers regularly, often without any protective equipment or adequate warning about the dangers.
The peak period of asbestos use in South Dakota's industrial sector extended from the 1940s through the early 1980s. During this era, asbestos-containing materials were considered essential for managing heat, fire risk, and friction in mining equipment, power generation systems, and military infrastructure. The underground environment of the Homestake Mine created particularly concentrated exposure conditions, as asbestos fibers released from equipment insulation and brake systems accumulated in confined tunnels with limited ventilation.
The 20-to-50-Year Latency Period
Mesothelioma does not appear immediately after asbestos exposure. The disease has a latency period of 20 to 50 years, meaning workers exposed at the Homestake Mine, Ellsworth Air Force Base, or South Dakota power plants during the 1960s and 1970s are being diagnosed now. A miner who operated heavy equipment with asbestos brake linings in the Homestake Mine during the 1970s may only receive a mesothelioma diagnosis in 2025 or later. This long latency period is why South Dakota continues to produce new mesothelioma cases decades after asbestos use was curtailed.
The geographic concentration of exposure in South Dakota also means that certain communities — particularly Lead, Rapid City, and Sioux Falls — have higher rates of mesothelioma diagnosis than might be expected for a state of this population size. Documenting your work history at these specific facilities is a critical first step in pursuing compensation.
South Dakota's Asbestos Legacy
The Homestake Gold Mine operated for 126 years and employed thousands of workers across multiple generations. Asbestos was present in mine equipment insulation, brake systems, pipe coverings, and surface buildings. Combined with asbestos exposure at Ellsworth Air Force Base, regional power plants, and cement manufacturing facilities, South Dakota workers across multiple industries and communities were affected. If you worked at any of these facilities, documenting your asbestos exposure history is a critical first step toward pursuing the compensation you may deserve.