Magma Copper Company - Pinto Valley Division
1993-01-21T12:00:00
SECRETARY OF LABOR,
MINE SAFETY AND HEALTH
ADMINISTRATION (MSHA),
Petitioner
v.
MAGMA COPPER COMPANY -
PINTO VALLEY DIVISION, Respondent
- WEST 92-98-M
- WEST 92-313-M
Mine Name:
Pinto Valley Operations