MINE DETAILS
Humboldt Mill
MSHA MINE ID2000420
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Humboldt Mill46.41111, -87.83556Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
422,635reported 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 | 71,805 | 0.00 | 149 | 1/1 mines reporting |
| 2025 Q2 | 0 | 72,083 | 0.00 | 155 | 1/1 mines reporting |
| 2025 Q3 | 0 | 73,011 | 0.00 | 154 | 1/1 mines reporting |
| 2025 Q4 | 0 | 65,975 | 0.00 | 143 | 1/1 mines reporting |
| 2026 Q1 | 0 | 66,046 | 0.00 | 144 | 1/1 mines reporting |
| 2026 Q2 | 0 | 73,715 | 0.00 | 155 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
171 significant & substantial (S&S)
Accident records
100 records classified as fatality
Proposed penalties · USD
3,736.0017 of 17 violations with amounts
On-site inspection hours
147.756 inspections · 6 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 | 4 | 1 | 1,773.00 | 0 | 0 | 1 | 1.5 |
| 2025-Q2 | 0 | 0 | — | 3 | 0 | 0 | — |
| 2025-Q3 | 2 | 0 | 302.00 | 1 | 0 | 2 | 22.8 |
| 2025-Q4 | 5 | 0 | 755.00 | 1 | 0 | 1 | 84.8 |
| 2026-Q1 | 0 | 0 | — | 1 | 0 | 1 | 15.5 |
| 2026-Q2 | 0 | 0 | — | 3 | 0 | 0 | — |
| 2026-Q3 | 6 | 0 | 906.00 | 1 | 0 | 1 | 23.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee was pulling cable in a tray and felt discomfort in their shoulder. They reported it and went back to work. the following week the employee continued to work but still had shoulder discomfort and an appointment was scheduled with a medical professional who prescribed work restrictions that couldn't be accommodated on 9/1/2026.
56.13021 · $151.00 proposed
56.14207 · $151.00 proposed
56.14112(a)(1) · $151.00 proposed
Regular Safety and Health Inspection · 23.3 on-site hours
56.12018 · $151.00 proposed
56.14101(a)(2) · $151.00 proposed
56.14101(a)(2) · $151.00 proposed
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee picked up a tub of water and tweaked their back.
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
While using a one-handed reciprocating saw, the blade hopped out of the rubber liner that was being cut and punctured a maintenance employee's hand.
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Employee struck knee on a pipe bracket while moving a ladder.
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Employee slipped and fell in an icy area and injured their shoulder.
Verbal Hazard Complaint Inspections · 15.5 on-site hours
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
After kneeling down while performing maintenance work on a conveyor belt, employee experienced knee swelling.
45.4(b) · $151.00 proposed
56.14100(b) · $151.00 proposed
56.4201(a)(2) · $151.00 proposed
56.4101 · $151.00 proposed
56.12018 · $151.00 proposed
Regular Safety and Health Inspection · 84.8 on-site hours
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee injured their ankle after falling approximately 3.5 feet off of a fixed ladder.
56.12004 · $151.00 proposed
56.12028 · $151.00 proposed
Regular Safety and Health Inspection · 22.0 on-site hours
Special Emphasis Programs · 0.8 on-site hours
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
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.
—
Lundin Mining CorporationcontrolsEagle Mine LLCoperatesHumboldt Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2000420—
Rio Tinto GroupcontrolsEagle Mine LLCoperatesHumboldt Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2000420—
Rio Tinto GroupcontrolsKennecott Eagle Land LLCoperatesHumboldt Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2000420—
Cleveland-Cliffs InccontrolsCleveland-Cliffs Iron CompanyoperatesHumboldt Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2000420Other 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
48 historical accident/injury rows; 0 coded fatalities and 175 lost days across the published record.
ACCIDENT + INJURY RECORD25 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
287 violation rows across the full record; 35 carry an S&S flag and $51,780 appears in current assessed amounts.
ENFORCEMENT ACTIVITY111 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
142 personal; 49 area. 1 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 EXPOSURE191 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
74K employee hours and 155 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
4 contested-violation rows, 4 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE11 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 CONTEXT30 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
82 inspection events and 3K published inspection hours across the historical record.
OVERSIGHT COVERAGE20 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 14 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.
30 CFR 56.13021High-pressure hose connections.1 recent row ↗30 CFR 56.14207Parking procedures for unattended equipment.1 recent row ↗30 CFR 56.14112Construction and maintenance of guards.1 recent row ↗30 CFR 56.12018Identification of power switches.2 recent rows ↗30 CFR 56.14101Brakes.2 recent rows ↗30 CFR 45.4Independent contractor register.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 56.4201Inspection.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
511648356.13021Citation
511648256.14207Citation
511648156.14112(a)(1)Citation
511647956.12018Citation
511647856.14101(a)(2)Citation
511647756.14101(a)(2)Citation
511722445.4(b)Citation
511722356.14100(b)Citation
Coal dust, noise and other contaminants. Silica records above ↑
Vanadium dustWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0500.00Source unit unspecified
Nickel dust & saltsWasher Operator
C/E: 00.02Concentration: 0000.02 · limit: 0001.00Source unit unspecified
Molybdenum dustWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0010.00Source unit unspecified
Manganese dustWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0005.00Source unit unspecified
Lead, inorganic dustWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0150.00Source unit unspecified
Copper dust and mistWasher Operator
C/E: 00.03Concentration: 0000.03 · limit: 0001.00Source unit unspecified
Cobalt dustWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0100.00Source unit unspecified
Chromium, solubleWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0500.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors48Dec 6, 2011—Aug 20, 2026mine-keyed
Addresses of Recordidentity · logistics1May 11, 2012—May 11, 2012mine-keyed
Assessed Violationscompliance · legal287Aug 30, 2012—Jul 22, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal4Apr 15, 2019—Jan 31, 2023mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal3Apr 29, 2014—Apr 9, 2019mine-keyed
Contested Violationscompliance · legal4Aug 27, 2018—Jul 5, 2022mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety3,609Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety782Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Jan 1, 1950—Jul 18, 2013mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance133Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance35Not published—Not publishedmine-keyed
Inspectionssafety · compliance82Aug 21, 2009—Jul 11, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety49Jun 11, 2018—Oct 24, 2018mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety142Jun 10, 2014—Oct 19, 2025mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal287Aug 30, 2012—Jul 22, 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.