MINE DETAILS
White Mesa Mill
MSHA MINE ID4201429
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- White Mesa Mill37.57389, -109.47806Open 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
313,649reported 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 | 51,341 | 0.00 | 102 | 1/1 mines reporting |
| 2025 Q2 | 0 | 50,093 | 0.00 | 98 | 1/1 mines reporting |
| 2025 Q3 | 0 | 51,048 | 0.00 | 100 | 1/1 mines reporting |
| 2025 Q4 | 0 | 52,399 | 0.00 | 104 | 1/1 mines reporting |
| 2026 Q1 | 0 | 55,249 | 0.00 | 109 | 1/1 mines reporting |
| 2026 Q2 | 0 | 53,519 | 0.00 | 113 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
110 significant & substantial (S&S)
Accident records
60 records classified as fatality
Proposed penalties · USD
1,678.0011 of 11 violations with amounts
On-site inspection hours
126.755 inspections · 5 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 | 0 | 604.00 | 3 | 0 | 1 | 42.8 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q3 | 3 | 0 | 470.00 | 0 | 0 | 2 | 26.0 |
| 2025-Q4 | 4 | 0 | 604.00 | 0 | 0 | 1 | 31.0 |
| 2026-Q1 | 0 | 0 | — | 3 | 0 | 0 | — |
| 2026-Q2 | 0 | 0 | — | 0 | 0 | 1 | 27.0 |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Regular Safety and Health Inspection · 27.0 on-site hours
STEPPING OR KNEELING ON OBJECT · DAYS AWAY FROM WORK ONLY
Accident narrative
On 3/17/26, the employee stepped on a rock and overextended the arch of their right foot. The injury was initially believed to be minor, but the pain persisted and worsened. On 4/13/26, the employee was evaluated at a clinic and prescribed an orthopedic boot. X-rays were negative for fractures; an MRI has been ordered for further evaluation.
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
While performing maintenance, an employee was manually removing a section of metal floor grating. The grating shifted unexpectedly, catching and pinching the employee's right middle finger between the grating and the support frame. This resulted in a laceration to the fingertip which required sutures for closure.
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
While performing a drilling task, the operator was applying manual pressure to the tool. The drill bit snapped unexpectedly under tension. The sudden release of resistance caused the operator's hand to lunge forward, striking the jagged edge of the broken bit and resulting in a puncture wound to the right index finger.
56.12006 · $151.00 proposed
56.12032 · $151.00 proposed
56.14101(a)(2) · $151.00 proposed
56.12030 · $151.00 proposed
Regular Safety and Health Inspection · 31.0 on-site hours
48.28(a) · $168.00 proposed
Regular Safety and Health Inspection · 25.0 on-site hours
56.12030 · $151.00 proposed
56.12018 · $151.00 proposed
Special Emphasis Programs · 1.0 on-site hours
47.41(a) · $151.00 proposed
56.12032 · $151.00 proposed
56.14107(a) · $151.00 proposed
Regular Safety and Health Inspection · 42.8 on-site hours
57.12006 · $151.00 proposed
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Miner was cleaning rocks out of the apron feeder in the tunnel. The left index finger was smashed between the bar the miner was using and the apron feeder wall. The contact resulted in the tip of the left index finger being fractured.
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
On 2/28/25, an employee injured EE's right knee while unloading drums from a trailer. EE climbed over drums to access tie-downs and jumped onto the trailer bed, landing awkwardly. Initial care was conservative. PT was later tried for symptom relief. In July, surgery was required, and the employee is now off work recovering.
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
The employee was using a hook knife to cut zip ties from a band when the knife slipped lacerating the tip of the middle finger on the left hand.
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.
—
Energy Fuels InccontrolsEFR White Mesa LLCoperatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429—
Energy Fuels InccontrolsEnergy Fuels Resources (USA) Inc.operatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429—
International Uranium CorpcontrolsEnergy Fuels Resources (USA) Inc.operatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429—
Harold RobertscontrolsEnergy Fuels Nuclear IncoperatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429—
Umetco Minerals Corp et alcontrolsUmetco Minerals CorpoperatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429—
Harold RobertscontrolsEnergy Fuels Nuclear IncoperatesWhite Mesa Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 4201429Other 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
47 historical accident/injury rows; 0 coded fatalities and 90 lost days across the published record.
ACCIDENT + INJURY RECORD14 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
325 violation rows across the full record; 63 carry an S&S flag and $116,964 appears in current assessed amounts.
ENFORCEMENT ACTIVITY37 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
135 personal. 0 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 EXPOSURE135 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
54K employee hours and 113 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 1 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE9 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 CONTEXT15 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
73 inspection events and 3K published inspection hours across the historical record.
OVERSIGHT COVERAGE14 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 15 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 56.12006Distribution boxes.1 recent row ↗30 CFR 56.12032Inspection and cover plates.2 recent rows ↗30 CFR 56.14101Brakes.1 recent row ↗30 CFR 56.12030Correction of dangerous conditions.2 recent rows ↗30 CFR 48.28Annual refresher training of miners; minimum courses of instruction; hours of instruction.1 recent row ↗30 CFR 56.12018Identification of power switches.1 recent row ↗30 CFR 47.41Requirement for container labels.1 recent row ↗30 CFR 56.14107Moving machine parts.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
973488356.12006Citation
973488256.12032Citation
973488156.14101(a)(2)Citation
973488056.12030Citation
973483748.28(a)Order
973483656.12030Citation
973483556.12018Citation
973479547.41(a)Citation
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgKiln/Dryer Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgElectrician
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgUtility Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgWarehouse Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgWarehouse Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgMechanic
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgLab Technician
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgCrusher Oper/Worker
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
15 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors47Dec 7, 2000—Mar 17, 2026mine-keyed
Addresses of Recordidentity · logistics1May 27, 2015—May 27, 2015mine-keyed
Assessed Violationscompliance · legal324Jan 26, 2000—Dec 21, 2025mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal4Apr 30, 2008—Jul 20, 2011mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal1Aug 12, 2002—Aug 12, 2002mine-keyed
Contested Violationscompliance · legal4Nov 30, 2005—Aug 4, 2010mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety1,968Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety393Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance6Jan 1, 1950—Feb 10, 2025mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance212Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance54Not published—Not publishedmine-keyed
Inspectionssafety · compliance73Jan 25, 2000—May 4, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety135Jun 5, 2001—Mar 25, 2025mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal325Jan 26, 2000—Dec 21, 2025mine-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.