The Hawk's Nest Tunnel disaster in West Virginia in the early 1930s resulted in a death toll ranging from roughly 700 to 1,000 of the 3,000 workers employed underground.
Sources
- 100 Years of Respiratory Protection History | NPPTL | NIOSH | CDC (archive.cdc.gov)
- https://www.wvencyclopedia.org/articles/1972 (wvencyclopedia.org)
- https://www.osha.gov/laws-regs/federalregister/2016-03-25-0 (osha.gov)
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