EE WAS OPERATING PC400 KOMATSU EXCAVATOR BY THE 530 LEVE SW QUARRY WALL, WHEN A LARGE ROCK STRUCK THE BUCKET & SLID DOWN THE ARM, STRIKING THE OPERATOR'S CAB. FATALLY INJURING THE OPERATOR.
USX Corp (United States Steel Corp): 6 recorded fatalities controller
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Email me when a new MSHA incident is filed at any mine USX Corp (United States Steel Corp) controls.
UNITED STATES STEEL CORP (X) discloses mines under this controller in its SEC Dodd-Frank Section 1503 (EX-95) mine-safety filings.
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This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.ⓘ
A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.ⓘ
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2026 | 1.13 | 0.28 | 0.000 |
| 2025 | 1.54 | 0.29 | 0.000 |
| 2024 | 1.68 | 0.25 | 0.000 |
| 2023 | 1.52 | 0.25 | 0.000 |
| 2022 | 1.58 | 0.21 | 0.000 |
| 2021 | 1.24 | 0.32 | 0.000 |
| 2020 | 1.23 | 0.31 | 0.000 |
| 2019 | 0.92 | 0.36 | 0.000 |
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A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.Metal and nonmetal contaminants (personal samples)
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Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.
Last sampled: 2026-03-10
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Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.- Quartz, respirable, >1% Qtz26443 over
- Nickel fumes321 over
- Respirable dust, <.1mg104
- Fibers, >5um68
Area samples (mill and shop air)
Last sampled: 2026-03-12ⓘ
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.- Settled 2,889 · 96%
- Stood as issued 26 · 1%
- Vacated or withdrawn 1 · 0%
- Still open 82 · 3%
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Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| LAKE 2016-0248 | Settlement | Miller | 2016 | $233K → $178K |
| LAKE 2008-316M | Settlement | Barbour | 2010 | $182K → $166K |
| LAKE 2024-0168 | Settlement | Lewis | 2024 | $169K → $133K |
| LAKE 2017-0294 | Settlement | McCarthy | 2018 | $131K → $96K |
| LAKE 2009-201M | Settlement | Barbour | 2010 | $129K → $91K |
| LAKE 2008-418M | Settlement | Barbour | 2010 | $120K → $107K |
Top causes
- POWERED HAULAGE 2 fatalities · 146 non-fatal
- SLIP OR FALL OF PERSON 1 fatality · 562 non-fatal
- MACHINERY 1 fatality · 281 non-fatal
- FIRE 1 fatality · 39 non-fatal
- EXPLODING VESSELS UNDER PRESSURE 1 fatality · 5 non-fatal
- HANDLING OF MATERIALS 982 non-fatal
Incident timeline
Operators under this controller
Mines on record
- Minntac Mine MN
- Minntac Plant MN
- Keetac MN
- Minntac Maintenance Dept. MN
Fatalities under this controller
6 recordedTHE SHIFT MANAGER TURNED THE VALVE ON THE PIPE PLUG WHICH WAS CONNECTED TO AN AIR COMPRESSOR ON THE BANK TO INFLATE THE PLUG. WHEN HE FELT THERE WAS ENOUGH AIR IN THE PIPE PLUG, HE SHUT THE VA LVE AND STATED OUT LOUD, "I THINK THERE IS ENOUGH AIR IN THE BLADDER, BUT THERE IS STILL SEEPAGE BETWEEN THE BLADDER AND THE PIPE." THE DECEASED BENT OVER THE PIPE AND TURNED THE AIR VALVE ON
THE DECEASED WAS WALKING WEST ON THE NORTH EDGE OF AN EMPLOYEE ROAD WHEN HE WAS STRUCK BY A PRIVATE VEHICLE DRIVEN BY ANOTHER EMPLOYEE WHO WAS TRAVELING WEST TO THE WEST PIT DRY THE ACCIDENT O CCURRED PRIOR TO THE START OF THE SHIFT
SEE ATTACHMENT-8ECEASED REPORTED TO WORK..FOR THE 5:30PM TO 1:30AM SHIFT.. FROM PRELIM: DRIVING HAUL TRUCK WHEN IT WENT OUT OF CONTROL.EITHER THROWN OR JUMPED FROM VEHICLE AND WAS RUN OVER BY REAR WHEEL. 3
INJURED APPARENTLY FELL FROM A PARKED HAULAGE TRUCK TO GROUND LEVEL AS HE WAS CLIMBING DOWN OVER THE TRUCK SUPERSTRUCTURE. AT SOME POINT IN HIS DECENT HE FELL AND STRUCK THE LEFT SIDE OF HIS H EAD AND LEFT SHOULDER AGAINST A FLAT SURFACE HE WAS FOUND APPROX. 6 FT IN FRONT O THE PARKED TRUCK, LYING ON HIS BACK, WITH ARMS FOLDED OVER HIS CHEST. HIS HARD HAT SOME 4 FT AWAY.
NO 1 & 2 STONE DRYERS WERE OPERATING ON #6 FUEL OIL AND #3 DRYER WAS OPERATING ON NATURAL GAS DURING THE 12 MIDNIGHT TO 8:00 AM SHIFT ON 6/24L83. RAW MATERIAL DEPT INCLUDING THE DRYERS WAS SCH INSURE THAT THE OIL IN THE FUEL LINES FROM THE STORAGE TANK TO THE DRYER BURNERS ARE PURGED OF OIL WHICH OTHERWISE WOULD PLUT THE FUEL LINES. THE FOREMAN PERSONALLY NOTIFIED THE INJURED TO BE
Where USX Corp (United States Steel Corp) stands on silica, penalties, and injury rate
MSHA's standard limits respirable silica to 50 micrograms per cubic metre, but MSHA publishes dust and quartz as separate files and never the silica figure itself. We derive it per sample, score it against the limit, and set the operator's injury rate against a benchmark built from the full MSHA operator record. With the 26-year penalty trail, contest posture, and fatality history. Delivered as a PDF with the underlying data as CSV.
The federal record itself stays free on this site. What costs money, and why.