MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 18, 2026

MINE DETAILS

Freeport-McMoRan Sierrita Ops.

ActiveSurfaceCopper Ore NEC
MSHA MINE ID0200144
LOCATIONPima, AZ
PUBLIC RECORD23,253 linked rows

LOCATION

Mine location

1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

155

31 significant & substantial (S&S)

  1. 2025 Q10
  2. 2025 Q238
  3. 2025 Q31
  4. 2025 Q43
  5. 2026 Q169
  6. 2026 Q20
  7. 2026 Q344
  8. 2026 Q4 *0

Accident records

60

0 records classified as fatality

  1. 2025 Q15
  2. 2025 Q213
  3. 2025 Q311
  4. 2025 Q46
  5. 2026 Q15
  6. 2026 Q212
  7. 2026 Q38
  8. 2026 Q4 *0

Proposed penalties · USD

169,000.00

150 of 155 violations with amounts

  1. 2025 Q1—
  2. 2025 Q284,998
  3. 2025 Q3193
  4. 2025 Q41,120
  5. 2026 Q158,051
  6. 2026 Q2—
  7. 2026 Q324,638
  8. 2026 Q4 *—

On-site inspection hours

707.00

23 inspections · 23 with hours

  1. 2025 Q17.00
  2. 2025 Q2192.00
  3. 2025 Q34.50
  4. 2025 Q43.00
  5. 2026 Q1277.50
  6. 2026 Q215.50
  7. 2026 Q3207.50
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q100—5017.0
2025-Q238884,998.001305192.0
2025-Q310193.0011024.5
2025-Q4311,120.006023.0
2026-Q1691958,051.00503277.5
2026-Q200—120315.5
2026-Q344324,638.00807207.5
2026-Q4 *00—000—

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Safety activity

  1. violation5046503

    56.14100(b) · $165.00 proposed

  2. violation5046502

    56.4104(b) · $366.00 proposed

  3. violation5045761

    56.12004 · $165.00 proposed

  4. violation5045760

    56.12004 · $151.00 proposed

  5. inspectionF011E0B

    Regular Safety and Health Inspection · 183.3 on-site hours

  6. violation5046501

    56.4201(a)(2) · $165.00 proposed

  7. violation5045759

    56.12028 · $755.00 proposed

  8. violation5045758

    56.14100(b) · $366.00 proposed

  9. violation5045757

    56.12019 · $366.00 proposed

  10. accident220261820030

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Hand of employee was caught between truck bed and davit arm assembly when loading equipment into bed.

  11. accident220261750007

    SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee tripped while walking between the motor and handrail to assist a coworker and fell onto the grating, resulting in a pinky finger injury.

  12. accident220261690003

    SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT

    Accident narrative

    Employee was backing up pulling vacuum pipe out of sump and EE's foot got caught on vacuum breaker causing EE to loose EE's balance. EE rotated and landed on EE's right knee as EE was trying to catch self.

  13. accident220261770001

    SLIP OR FALL OF PERSON · ALL OTHER CASES (INCL 1ST AID)

    Accident narrative

    Individual attempted to dismount forklift via side steps, overstepped the last step causing to fall backwards. Individual attempted to stop impact from fall by extending arm. Left wrist was sprained in the process. Individual was seen by onsite medical team and refused further treatment, as EE didn't feel it was necessary.

  14. inspectionF004811

    Impoundment Spot Inspection · 4.0 on-site hours

  15. accident220261550006

    HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY

    Accident narrative

    While removing a bed pin, stored energy in the component caused it to suddenly dislodge and shift the bed. The uncontrolled movement allowed the brass bar to slip and drop, pinning the employee's hand against the tire. Resulted in a hand injury from impact/pinch force.

  16. accident220261550003

    POWERED HAULAGE · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Loose material during loading allowed a rock to roll from the bucket and strike Cat 75, causing a rough load event. The impact broke the rear window. The operator later developed back pain and required clinic evaluation by ERT.

  17. inspectionF0370E0

    103 (g) Written Notification Hazard Complaint Inspectio · 6.5 on-site hours

  18. accident220261470011

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    The employee met with supervisors in a parking lot on the east side of the building. After the conversation, EE turned to walk back to the office and tripped over a wheel chock (angle iron) because EE did not fully clear it. EE fell onto EE's right knee and elbow. EE was wearing steel-toe boots, and no other PPE was involved.

  19. inspectionF0370DD

    103 (g) Written Notification Hazard Complaint Inspectio · 5.0 on-site hours

  20. accident220261340011

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee felt a groin strain while cleaning but delayed reporting it until the end of the shift when the pain persisted.

  21. accident220261210011

    STRIKING OR BUMPING · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee inspecting a hose stood up in a confined space and struck their hard hat on a frame causing their jaw to snap shut and chip a tooth with a minor gum laceration.

  22. accident220261180012

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee used Brakleen to remove hydraulic oil from their hands; after doing so they took a smoke break causing burns to their hands.

  23. accident220261180006

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    The operator was dismounting equipment using a ladder when they experienced pain and noted swelling in the knee.

  24. accident220260970036

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    While cleaning a flowmeter for install, employee cut right finger on the sensor requiring stitches.

  25. accident220260910030

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    While employee was removed tires from a connex for delivery, they noticed overlap of tires with an adjacent stack. As additional force was used to move the overlapped tire, the adjacent stack became unstable causing some tires to fall and strike the employee which resulted in the employee falling and straining their back.

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.

OWNERSHIP

Operator and controller history

Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.

CURRENT HIERARCHYFreeport-McMoRan Inc → Freeport-McMoRan Sierrita Ops. → Freeport-McMoRan Sierrita Ops.
HISTORY RECORDS411 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

Freeport-McMoRan InccontrolsFreeport-McMoRan Sierrita Ops.operatesFreeport-McMoRan Sierrita Ops.

msha-controller-operator-history · controller/operator co-tenure derived on mine 0200144
—

Phelps Dodge CorpcontrolsFreeport-McMoRan Sierrita Ops.operatesFreeport-McMoRan Sierrita Ops.

msha-controller-operator-history · controller/operator co-tenure derived on mine 0200144
—

Cyprus Amax Minerals CompanycontrolsCyprus Sierrita CorpoperatesFreeport-McMoRan Sierrita Ops.

msha-controller-operator-history · controller/operator co-tenure derived on mine 0200144
—

Pennzoil CompanycontrolsDuval CorpoperatesFreeport-McMoRan Sierrita Ops.

msha-controller-operator-history · controller/operator co-tenure derived on mine 0200144
Other historical summaries · source-specific periods

RECORD SUMMARY

Production, safety and enforcement

These summaries use the periods stated on each card, independently of the reporting period above.

01 / SAFETYwatch

Accidents and injuries

797 historical accident/injury rows; 0 coded fatalities and 10,412 lost days across the published record.

ACCIDENT + INJURY RECORD190 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

2,519 violation rows across the full record; 470 carry an S&S flag and $2,031,777 appears in current assessed amounts.

ENFORCEMENT ACTIVITY492 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

224 personal; 22 area. 31 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.

OCCUPATIONAL EXPOSURE246 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

687K employee hours and 1,326 summed average employees across reported subunits in the latest published quarter.

2026-Q20 tons
mine-production-quarterlymine-production-yearly
05 / LEGALwatch

Contests, conferences and decisions

370 contested-violation rows, 377 civil-penalty docket/decision rows, and 36 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE783 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions
06 / CONTRACTORScontext

Contractors

Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.

ENTITY-LEVEL CONTEXT97 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

228 inspection events and 18K published inspection hours across the historical record.

OVERSIGHT COVERAGE72 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records40 coal · 4 personal · 0 area
Sample status0 not voided0 voided · 4 status not reported
Personal samples with C/E > 134 published ratios · not a citation count
2026 · Feb 19, 2026–Feb 19, 2026
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished action
000000202600678700Metal/nonmetal personalQuartz, respirable, >1% QtzMechanic1.01× published limitConcentration: 0000.71 · limit: 0000.70Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F00330B
000000202600678800Metal/nonmetal personalQuartz, respirable, >1% QtzMechanic0.5× published limitConcentration: 0000.32 · limit: 0000.64Source unit unspecifiedNot reportedNO ACTIONInspection F00330B
000000202600678900Metal/nonmetal personalQuartz, respirable, >1% QtzCrusher Oper/Worker1.1× published limitConcentration: 0000.67 · limit: 0000.61Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F00330B
000000202600679000Metal/nonmetal personalQuartz, respirable, >1% QtzCrusher Oper/Worker1.06× published limitConcentration: 0000.67 · limit: 0000.63Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F00330B
Sources and interpretation
  • Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
  • Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
  • Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
  • Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
  • Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.

Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗

EIA + TITLE 30

EIA production and cited regulations

EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.

RECENT PUBLIC RECORDS

Recent violations and samples

Latest records retained for inspection; aggregates above use the full source history.

VIOLATIONS12 latest shown
505939556.20010S&S
504577556.12004Citation
522118056.14132(b)(2)Citation
522117956.14100(b)Citation
505290056.14205Citation
504577456.4200(b)(2)Citation
522117848.27(a)Citation
504577356.14205Citation
OTHER HEALTH SAMPLES4 latest shown

Coal dust, noise and other contaminants. Silica records above ↑

Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgDrill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgBulldozer Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

16 datasets contain linked records. Missing datasets are listed below.

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors797Jan 4, 2000—Sep 21, 2026mine-keyed
Addresses of Recordidentity · logistics1Apr 1, 1986—Apr 1, 1986mine-keyed
Assessed Violationscompliance · legal2,504Apr 6, 2000—Jul 31, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal377Jul 7, 2000—Dec 12, 2025mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal36Jul 6, 2000—Nov 2, 2020mine-keyed
Contested Violationscompliance · legal370Sep 28, 2005—Jul 22, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety13,098Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety2,673Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Jan 1, 1950—Jan 1, 2000mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance228Apr 3, 2000—Sep 23, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety22Jan 13, 2015—Jan 13, 2015mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety224Feb 5, 2002—Feb 19, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal2,519Apr 6, 2000—Sep 10, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable

NOTES

Limitations

  • Contractor production is entity-level and is never represented as mine-attributable.
  • Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.