MINE DETAILS
Minntac Plant
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
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.
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.
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
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.
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.
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.
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.
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
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.
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
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
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
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.
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.
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
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.
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
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.
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.
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.
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.
Accidents and injuries
429 historical accident/injury rows; 0 coded fatalities and 7,237 lost days across the published record.
accidentsmine-production-quarterlyViolations 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.
inspectionsviolationsassessed-violationsorders-107aOccupational 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.
personal-health-samplesarea-samplesQuarterly production and employment
296K employee hours and 567 summed average employees across reported subunits in the latest published quarter.
mine-production-quarterlymine-production-yearlyContests, conferences and decisions
1,448 contested-violation rows, 1,445 civil-penalty docket/decision rows, and 23 conference records linked by issuance number.
conferencescontested-violationscivil-penalty-dockets-decisionsContractors
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.
contractor-production-quarterlycontractor-production-yearlyaccidentsviolationsInspections
205 inspection events and 22K published inspection hours across the historical record.
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.
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.
Coal dust, noise and other contaminants. Silica records above ↑
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
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.