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Mine Disasters in the United States

Magma Copper Company
Magma Mine Falling Material Accident

Superior, Pinal County, Arizona
August 10, 1993
No. Killed 4

MSHA Final Investigation Report  (19.6 Mb)  PDF Format

See also:   Magma Mine Fire, Nov. 24, 1927
  Magma Mine Cave-in, May 10, 1982

An ore pass raise collapsed in this mine while four persons were working inside.  The victims had entered the raise to free the hang-up of material in the ore pass side of the structure and the ground support structure failed.

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