Coal production
0reported short tons
ALL STATUSES / OPERATOR PORTFOLIO
Freeport-McMoRan Sierrita Ops.
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL17248
MINE PORTFOLIO
2 of 2 mines and facilities
2025-01-01 – 2026-10-18. All statuses records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| Freeport-McMoRan Sierrita Ops.0200144 · Active6/8 quarters reported | Pima, AZSurface · MSHA: Copper Ore NEC | 0 | 4,067,210 | 155 | 60 | 707.0 |
| Twin Buttes Mine0203262 · Abandoned | Pima, AZSurface · MSHA: Copper Ore NEC | — | — | 0 | 0 | — |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
Portfolio map
2 of 2 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Freeport-McMoRan Sierrita Ops.31.87583, -111.10111Open map ↗
- Twin Buttes Mine31.87250, -111.08805Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 2 mines listed under this operator were checked; 1 have reports in the available quarters. Totals use current ownership.
Hours worked
4,067,210reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 674,806 | 0.00 | 1,308 | 1/1 mines reporting |
| 2025 Q2 | 0 | 694,775 | 0.00 | 1,304 | 1/1 mines reporting |
| 2025 Q3 | 0 | 678,367 | 0.00 | 1,382 | 1/1 mines reporting |
| 2025 Q4 | 0 | 661,620 | 0.00 | 1,350 | 1/1 mines reporting |
| 2026 Q1 | 0 | 671,104 | 0.00 | 1,293 | 1/1 mines reporting |
| 2026 Q2 | 0 | 686,538 | 0.00 | 1,326 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
15531 significant & substantial (S&S)
Accident records
600 records classified as fatality
Proposed penalties · USD
169,000.00150 of 155 violations with amounts
On-site inspection hours
707.0023 inspections · 23 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 0 | 0 | — | 5 | 0 | 1 | 7.0 |
| 2025-Q2 | 38 | 8 | 84,998.00 | 13 | 0 | 5 | 192.0 |
| 2025-Q3 | 1 | 0 | 193.00 | 11 | 0 | 2 | 4.5 |
| 2025-Q4 | 3 | 1 | 1,120.00 | 6 | 0 | 2 | 3.0 |
| 2026-Q1 | 69 | 19 | 58,051.00 | 5 | 0 | 3 | 277.5 |
| 2026-Q2 | 0 | 0 | — | 12 | 0 | 3 | 15.5 |
| 2026-Q3 | 44 | 3 | 24,638.00 | 8 | 0 | 7 | 207.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
RAM Belt Team was performing work on the 8D feeder belt. While maneuvering the I-beam on the deck, two RAM employees - one pulling and one pushing - attempted to slide the I-beam into position. During this process, one team member's right pinky finger was pinched between the I-beam and the structure.
- Freeport-McMoRan Sierrita Ops. · 0200144
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
EE was dismounting a haul truck from night shift. EE was on the lower platform of the truck when EE's backpack became hung up on the handrail. As EE was trying to free the backpack, EE lost EE's footing and fell to the ground. EE sustained a laceration to EE's face and soreness in EE's neck. EE received 13 stitches and was taken off work.
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was removing placement bars on the reject chute cover. The last bar was under tension and when it released it struck EE in the face. EE sustained a broken tooth and a laceration to EE's mouth. EE received 8 stitches.
- Freeport-McMoRan Sierrita Ops. · 0200144
ENTRAPMENT · ACCIDENT ONLY
Accident narrative
1 EE was inside the Primary Crusher elevator when it stopped. The elevator would not move.
- Freeport-McMoRan Sierrita Ops. · 0200144
Spot Inspection · 4.8 on-site hours
- Freeport-McMoRan Sierrita Ops. · 0200144
SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was providing a site tour to auditors. EE was walking out of the man van and twisted an ankle without feeling pain. EE notified supervisor was treated and released. On 8/13/2025 they were diagnosed with a nondisplaced microtrbecular fracture. EE was also issued PT.
- Freeport-McMoRan Sierrita Ops. · 0200144
DISORDERS (PHYSICAL AGENTS) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
EE was showing other employees how the computers are utilized in the office building. EE began to feel ill. ERT was contacted and EE was taken to the hospital for further evaluation. Diagnosed with dehydration.
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was working on a buggy whip when the screwdriver being utilized slipped and penetrated the right index finger. Employee received stitches and was released to work.
- Freeport-McMoRan Sierrita Ops. · 0200144
Non-Injury Accident Investigation · 5.0 on-site hours
- Freeport-McMoRan Sierrita Ops. · 0200144
FIRE · ACCIDENT ONLY
Accident narrative
Motor grader fire. Unknown cause. Operator exited equipment and issued a Mayday. Local fire department and FMI water trucks responded.
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was removing liner plates. While handing an 8" x 4' piece from the regrind cell to the employee standing on the deck. Their finger was caught between the piece and the handrail.
- Freeport-McMoRan Sierrita Ops. · 0200144
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
EE was getting off a dump truck. As they stepped back, they slipped on mud from the top step. As they landed, they rolled their left ankle. EE sustained a sprain to an ankle. EE was issued restrictions.
- Freeport-McMoRan Sierrita Ops. · 0200144
Non-Injury Accident Investigation · 2.0 on-site hours
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
While removing the axle shaft from the right final for the final PCR, the shaft was stock. The technician started to move the shaft to release it. The shaft shot backwards, pinning the technician's right hand against the forklift and mast. The technician sustained a fracture to the hand. Employee was issued restrictions.
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was conducting work in the mill underflow tubs by chipping away steel ball chips from the grating when a piece of metal went into their eye and began causing discomfort. EE was taken to get medical treatment and was prescribed an antibiotic.
- Freeport-McMoRan Sierrita Ops. · 0200144
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
while lining up the new filter to insert all thread a pebble fell off the shelf bounced past my face shield and passed through the top gap in my glasses and into the inside corner of my right eye. It instantly began burning
- Freeport-McMoRan Sierrita Ops. · 0200144
EXPLODING VESSELS UNDER PRESSURE · DAYS AWAY FROM WORK ONLY
Accident narrative
EE was removing a valve stem cover plate. After removing the first 4 bolts, they proceeded to remove 2 more. As EE was removing the second, the knife valve split apart, causing slurry to shoot out the side. Slurry came into contact with the EE. EE sustained abrasions and multiple contusions. EE was issued restrictions.
- Freeport-McMoRan Sierrita Ops. · 0200144
56.12022 · $1,037.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
56.12021 · $151.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
56.12028 · $366.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
Impoundment Spot Inspection · 4.0 on-site hours
- Freeport-McMoRan Sierrita Ops. · 0200144
56.15006 · $1,219.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
50.20(a) · $151.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
56.12028 · $1,219.00 proposed
- Freeport-McMoRan Sierrita Ops. · 0200144
56.15001 · S&S · $697.00 proposed
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
SELECTED PORTFOLIO
1 linked controller.
Relationships reflect the selected mine status and current MSHA controller/operator fields.