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

MINE DETAILS

Minntac Plant

ActiveFacilityIron Ore
MSHA MINE ID2100820
LOCATIONSt Louis, MN
PUBLIC RECORD21,640 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

406

61 significant & substantial (S&S)

  1. 2025 Q1156
  2. 2025 Q2103
  3. 2025 Q30
  4. 2025 Q41
  5. 2026 Q1122
  6. 2026 Q221
  7. 2026 Q33
  8. 2026 Q4 *0

Accident records

29

0 records classified as fatality

  1. 2025 Q15
  2. 2025 Q25
  3. 2025 Q31
  4. 2025 Q410
  5. 2026 Q15
  6. 2026 Q23
  7. 2026 Q30
  8. 2026 Q4 *0

Proposed penalties · USD

1,249,824.00

406 of 406 violations with amounts

  1. 2025 Q1275,839
  2. 2025 Q2158,136
  3. 2025 Q3—
  4. 2025 Q42,936
  5. 2026 Q1729,471
  6. 2026 Q247,728
  7. 2026 Q335,714
  8. 2026 Q4 *—

On-site inspection hours

468.00

17 inspections · 17 with hours

  1. 2025 Q1144.25
  2. 2025 Q22.75
  3. 2025 Q3—
  4. 2025 Q411.25
  5. 2026 Q1209.00
  6. 2026 Q294.50
  7. 2026 Q36.25
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q11569275,839.00504144.3
2025-Q21039158,136.005022.8
2025-Q300—100—
2025-Q4102,936.00100311.3
2026-Q112241729,471.00505209.0
2026-Q221047,728.0030294.5
2026-Q33235,714.000016.3
2026-Q4 *00—000—

Most cited CFR sections

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

Safety activity

  1. accident220261680027

    HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    EE was using a utility knife to remove banding from some packaged material. EE was cutting towards self when EE slipped and cut EE's cheek with the knife. this resulted in sutures.

  2. accident220261660035

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE was moving a section of 6 inch channel iron that was being used on a conveyor repair. as EE was moving the channel iron EE pinched the tip of EE's right ring finger between the channel and section of handrail. this resulted in sutures on the tip of EE's finger.

  3. accident220261050015

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    EE was working on housekeeping tasks. They bent down to pick up an old roller from a conveyor belt and felt a pain in their right wrist. Strain/Sprain

  4. accident220260890078

    EXPLODING VESSELS UNDER PRESSURE · DAYS AWAY FROM WORK ONLY

    Accident narrative

    At approximately 11:55am, the Line 3 scrubber drop out box ruptured releasing large volumes of water onto the floor. The employee was likely north of the launder when the water swept them down the inclined walkway wedging them beneath the kiln pier stairs.

  5. accident220260820004

    MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    When the bit caught a piece of steel, the hand drill twisted in the employee's hand striking the employee in the face with the battery of the cordless drill.

  6. accident220262730005

    HANDLING OF MATERIALS · PERM TOT OR PERM PRTL DISABLTY

    Accident narrative

    Employee was loading ball mill rubber lifter bars onto the roll conveyor by sliding them from a pallet on a forklift lifted to the same level, when the employee felt a tear in their abdomen/groin area. The lifter bar weight is 94 pounds. 120-10-1 Ball mill discharge end.

  7. accident220260430018

    NONPOWERED HAULAGE · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    The employee was pushing a scrap skip weighing approx. 2200 pounds across the Filter floor on a pallet jack when the employee felt a pop in their right calf.

  8. accident220260400012

    HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    MTM was lifting Milwaukee battery operated come-along that was in the case from the floor to EE's plant kat

  9. accident220253530017

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Injured MTM was installing a drive sheave on a pump with a partner. The MTM's partner was installing the sheave while the injured MTM was pushing on the guard. The injured MTM's right pointer finger was in the pinch point of the guard hinge. When the injured MTM felt the pain from the guard pinching their finger, they pulled it out while it was still pinched.

  10. accident220253500022

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    EE was pushing a sheet of stainless into position to be welded, as they were pushing the sheet they felt a sharp pain in left shoulder. This resulted in a strain/sprain type of injury.

  11. accident220253170673

    HOISTING · ACCIDENT ONLY

    Accident narrative

    Employee became entrapped in the Step 1, 2 Agglomerator basement elevator. The main gate was notified at 852 AM and the employee was able to safely exit the elevator 927 AM.

  12. accident220253210037

    OTHER · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    EE was working in the Kiln. They moved to the side and left knee buckled. this resulted in a strain/sprain type of injury.

  13. accident220253170470

    ENTRAPMENT · ACCIDENT ONLY

    Accident narrative

    Employee was stuck in the Step 1, 2 Agglomerator basement elevator. The employee became trapped at 902 AM. Security and safety were eventually notified. First responders arrived shortly after 930 and were able to get the employee out at 940 AM

  14. accident220253170387

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was pushing up on a conveyor belt trying to get additional clearance to remove a roller. After releasing the belt employee felt a popping and burning sensation in their hand

  15. accident220253170257

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    043-06-1 conveyor belt where employees were doing work to the belt and changing rollers. Employee was helping clean up and pulling out a return roller from under the belt at which time EE felt pain in EE's left bicep. Other employees were also present at the time of the incident. Employee said EE is unable to straighten EE's left arm

  16. accident220253170256

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    MTM was changing all-thread to level the thickener rake. When employee was finished, EE felt pain in EE's shoulder. Employee climbed down from the job and reported the incident to supervisor

  17. accident220253170113

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was moving breaker from waist level off of plant kat onto plastic cart which was at knee height and approximately 2 feet away from plant kat. Breaker weighed approximately 120 pounds; the lift was assisted with another employee. The employee felt pain in their left bicep while moving the breaker

  18. accident220253170177

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE was replacing a valve. EE was using a torch to remove flange bolts, once EE was down to the last bolt, water that was trapped in the line started to spray out from around the flange. Not wanting to get wet, EE took a step backwards and tripped over a curb. EE put EE's hands out to catch self and bent EE's right wrist backwards, this resulted in a fracture of EE's wrist.

  19. accident220252030030

    SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was traveling to sample pellets from line 4 and about the climb stairway from basement level, when they slipped on the pellets and mud at the base of stairway and twisted their left knee.

  20. accident220251620004

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee was changing a belt on a drive motor and pinched EE's finger

  21. accident220251470004

    NONPOWERED HAULAGE · DAYS AWAY FROM WORK ONLY

    Accident narrative

    EE was using a cart to haul boiler tubes. The surface was smooth/flat concrete, slag/ash had fallen off the tubes while loading them on the cart. slag/ash prevented the wheels from freely moving in the intended direction while being pushed. This resulted in the cart tipping to one side. the EE stopped the cart from tipping, in doing so the EE strained the muscles of EE's left arm.

  22. accident220251270032

    SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee was walking from Line 4 performing routine rounds when they slipped on pellets. The employee caught themselves & jaw came down and locked inflicting pain to lower jaw area. The employee notified the supervisor and EMS was called. The employee was then transported to telemedicine and later returned to work with a sore jaw and will be followed up on next shift per EMS

  23. accident220251280011

    HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE was removing steel grating from a floor launder for the purpose of cleaning the launder. As they were pulling the grating they experienced a pain in lower back on the right side. This incident resulted in the EE having a sprained lumbar.

  24. accident220251070003

    HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    EE didn't have a belt to hold up EE's FR work pants, so EE used zip ties through EE's belt loops as a makeshift belt. At the end of EE's shift, the EE grabbed a utility knife to cut the zip ties from EE's belt loops, the knife slipped and the EE cut the palm and thumb of EE's left hand. this resulted in stitches.

  25. accident220252060024

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    When doing alignment for the fan motor the rotor has to be spun. Employee was moving the rotor manually by pushing on the fan blades and felt pain in the right shoulder. THIS INCIDENT BECAME A RECORDABLE ON 7/24/25 WHEN THE EMPLOYEE RECEIVED RESTRICTIONS UPON SURGERY.

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 HIERARCHYUSX Corp (United States Steel Corp) → United States Steel Corp-Minnesota Ore Operations → Minntac Plant
HISTORY RECORDS13 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

USX Corp (United States Steel Corp)controlsUnited States Steel Corp-Minnesota Ore OperationsoperatesMinntac Plant

msha-controller-operator-history · controller/operator co-tenure derived on mine 2100820
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

429 historical accident/injury rows; 0 coded fatalities and 7,237 lost days across the published record.

ACCIDENT + INJURY RECORD80 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

6,200 violation rows across the full record; 1,416 carry an S&S flag and $9,001,963 appears in current assessed amounts.

ENFORCEMENT ACTIVITY1,212 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

281 personal; 10 area. 2 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 EXPOSURE291 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

296K employee hours and 567 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

1,448 contested-violation rows, 1,445 civil-penalty docket/decision rows, and 23 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE2,916 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 CONTEXT40 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

205 inspection events and 22K published inspection hours across the historical record.

OVERSIGHT COVERAGE62 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records00 coal · 0 personal · 0 area
Sample status0 not voided0 voided · 0 status not reported
Personal samples with C/E > 1—0 published ratios · not a citation count
2026 · No reported dates in this selection
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished action
No silica records match these filters. Missing samples do not establish safe conditions.
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.

EIA MINE CONTEXTNo matched record
Not present in the 2024 EIA coal workbook.

This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.

RECENT PUBLIC RECORDS

Recent violations and samples

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

VIOLATIONS12 latest shown
511578356.20003(b)Citation
511578256.20003(b)S&S
511578156.20003(b)S&S
511184456.12028Citation
511184256.16005Citation
511184156.20003(a)Citation
511184056.12030Citation
511183956.14112(b)Citation
OTHER HEALTH SAMPLES8 latest shown

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

Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0450.00Source unit unspecified
Lead, inorganic dustUtility Man
C/E: 00.73Concentration: 0330.00 · limit: 0450.00Source unit unspecified
Lead, inorganic dustUtility Man
C/E: 00.00Concentration: 0000.00 · limit: 0150.00Source unit unspecified
Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0150.00Source unit unspecified
Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0450.00Source unit unspecified
Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0450.00Source unit unspecified
Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0450.00Source unit unspecified
Lead, inorganic dustCleanup Man
C/E: 00.00Concentration: 0000.00 · limit: 0150.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

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

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors429Jan 8, 2000—Jun 15, 2026mine-keyed
Addresses of Recordidentity · logistics1Oct 1, 1987—Oct 1, 1987mine-keyed
Assessed Violationscompliance · legal6,188Jan 13, 2000—Aug 20, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal1,445Mar 10, 2006—Apr 29, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal23Jul 7, 2005—Mar 31, 2026mine-keyed
Contested Violationscompliance · legal1,448Jun 16, 2005—Mar 18, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety4,177Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety965Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance1Jan 1, 1950—Jan 1, 1950mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance212Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance54Not published—Not publishedmine-keyed
Inspectionssafety · compliance205Jan 11, 2000—Aug 20, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety10Sep 16, 2024—Feb 24, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety281Mar 29, 2001—Mar 10, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal6,200Jan 13, 2000—Aug 20, 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.