Mining Incidents

Twin Buttes Mine Metal/Non-Metal

Controlled by Freeport-McMoRan Inc
Green Valley, Pima County, AZ  ·  Abandoned
MSHA Mine ID: 0203262

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Fatalities
0
Total incidents
4
Years on record
2010–2012
Latest incident
Apr 2012
Compliance record
MSHA citations since 2010
20
citations
5
significant & substantial
$2,365
proposed penalties
$2,357
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2013 Q1 500 3 0 6000.0
2012 Q2 500 6 2 12000.0
2012 Q1 0 3 3
2011 Q4 0 0 0
2011 Q3 0 0 0
2011 Q2 0 0 0
2011 Q1 300 0 0 0.0
2010 Q4 300 7 0 23333.3
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

4 on file

2012 · 1 incident

April 27, 2012 AZ · Metal/Non-Metal outside foreman, leadman HANDLING OF MATERIALS
Freeport-McMoRan Sierrita Inc. · Struck by... (Not Elsewhere Classified)

Employee was supervising the installation of forms for the hearth being worked on when a worker lifted the form, lost his grip and the form fell against the left hand of employee.

2011 · 2 incidents

August 26, 2011 AZ · Metal/Non-Metal assayer, geologist, metallurgist, engineer, engineer management HANDLING OF MATERIALS
Freeport-McMoRan Sierrita Inc. · Over-exertion in lifting objects

EE was correcting a mis-positioned box of core on a pallet, when he twisted while being over extended. EE did not report to Employer until 9/9/11.

June 27, 2011 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Freeport-McMoRan Sierrita Inc. · Struck by... (Not Elsewhere Classified)

Employee states while hitting the core barrel to remove core that was stuck, he brought hammer down on his left thumb casing a laceration.

2010 · 1 incident

August 24, 2010 AZ · Metal/Non-Metal ledgeman/hand, quarry man DISORDERS (PHYSICAL AGENTS)
Freeport-McMoRan Sierrita Inc. · Contact with heat

Employee states that he had just parked the water truck and got out to set the cones down, then hooked the water hose, and as he walked away he passed out and fell to the ground landing face forward.