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Mine Disasters in the United States

W. R. Grace and Company
Bonnie Lake Mine Hydrogen Sulfide Asphyxiation

Bartow, Polk County, Florida
June 4, 1975
No. Killed 2

From the Google News Archives:  External Link
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Victims were killed when they were overcome by hydrogen sulfide gas while placing flashboards near the bottom of a spillway decant tower.

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