MINE DETAILS
Minntac Plant
MSHA MINE ID2100820
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Minntac Plant47.56472, -92.63611Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
1,530,373reported 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 | 249,804 | 0.00 | 479 | 1/1 mines reporting |
| 2025 Q2 | 0 | 256,281 | 0.00 | 492 | 1/1 mines reporting |
| 2025 Q3 | 0 | 238,018 | 0.00 | 456 | 1/1 mines reporting |
| 2025 Q4 | 0 | 230,468 | 0.00 | 442 | 1/1 mines reporting |
| 2026 Q1 | 0 | 260,283 | 0.00 | 499 | 1/1 mines reporting |
| 2026 Q2 | 0 | 295,519 | 0.00 | 567 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
40661 significant & substantial (S&S)
Accident records
290 records classified as fatality
Proposed penalties · USD
1,249,824.00406 of 406 violations with amounts
On-site inspection hours
468.0017 inspections · 17 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 | 156 | 9 | 275,839.00 | 5 | 0 | 4 | 144.3 |
| 2025-Q2 | 103 | 9 | 158,136.00 | 5 | 0 | 2 | 2.8 |
| 2025-Q3 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2025-Q4 | 1 | 0 | 2,936.00 | 10 | 0 | 3 | 11.3 |
| 2026-Q1 | 122 | 41 | 729,471.00 | 5 | 0 | 5 | 209.0 |
| 2026-Q2 | 21 | 0 | 47,728.00 | 3 | 0 | 2 | 94.5 |
| 2026-Q3 | 3 | 2 | 35,714.00 | 0 | 0 | 1 | 6.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
56.20003(a) · $2,936.00 proposed
56.20003(a) · $1,320.00 proposed
56.4200(b)(2) · $697.00 proposed
56.20003(b) · S&S · $17,082.00 proposed
56.12005 · $1,037.00 proposed
56.12032 · $818.00 proposed
56.12018 · $313.00 proposed
56.20003(a) · S&S · $14,557.00 proposed
56.20003(a) · $2,936.00 proposed
56.20003(a) · $2,936.00 proposed
Regular Safety and Health Inspection · 173.0 on-site hours
56.4200(b)(2) · $697.00 proposed
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.
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.
Verbal Hazard Complaint Inspections · 2.8 on-site hours
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.
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.
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
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
Verbal Hazard Complaint Inspections · 5.5 on-site hours
56.20003(a) · $2,936.00 proposed
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
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
103 (g) Written Notification Hazard Complaint Inspectio · 3.0 on-site hours
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
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.
—
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 2100820Other 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-quarterly02 / 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-107a03 / 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-samples04 / 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-yearly05 / 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-decisions06 / 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-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
205 inspection events and 22K published inspection hours across the historical record.
OVERSIGHT COVERAGE62 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 18, 2026. 84 silica records across the mine’s published history.
Personal silica samples · concentration / limit
Quarterly mean · published C/E ratio
— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.
Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published 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.
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.
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
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.