MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 18, 2026

MINE DETAILS

WE Soda @ WESTVACO

ActiveUndergroundTrona
MSHA MINE ID4800152
LOCATIONSweetwater, WY
PUBLIC RECORD26,730 linked rows

LOCATION

Mine location

1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.

Mine coordinates

2025-01-01 – 2026-10-18Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

331

38 significant & substantial (S&S)

  1. 2025 Q187
  2. 2025 Q264
  3. 2025 Q356
  4. 2025 Q435
  5. 2026 Q141
  6. 2026 Q228
  7. 2026 Q320
  8. 2026 Q4 *0

Accident records

65

0 records classified as fatality

  1. 2025 Q15
  2. 2025 Q29
  3. 2025 Q312
  4. 2025 Q412
  5. 2026 Q19
  6. 2026 Q28
  7. 2026 Q310
  8. 2026 Q4 *0

Proposed penalties · USD

211,168.00

323 of 331 violations with amounts

  1. 2025 Q177,125
  2. 2025 Q221,334
  3. 2025 Q350,086
  4. 2025 Q417,142
  5. 2026 Q119,126
  6. 2026 Q222,394
  7. 2026 Q33,961
  8. 2026 Q4 *—

On-site inspection hours

2,895.25

164 inspections · 164 with hours

  1. 2025 Q1414.50
  2. 2025 Q2349.00
  3. 2025 Q3513.25
  4. 2025 Q4462.50
  5. 2026 Q1434.25
  6. 2026 Q2405.50
  7. 2026 Q3309.25
  8. 2026 Q4 *7.00
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q187677,125.005024414.5
2025-Q264521,334.009020349.0
2025-Q3561050,086.0012023513.3
2025-Q435817,142.0012026462.5
2026-Q141519,126.009024434.3
2026-Q228222,394.008020405.5
2026-Q32023,961.0010024309.3
2026-Q4 *00—0037.0

Most cited CFR sections

All violations issued in the selected period. Counts combine subsections.

Safety activity

  1. accident220262740009

    INUNDATION · ACCIDENT ONLY

    Accident narrative

    The air in the longwall headgate #2 entry inby of the longwall face had an oxygen content of less that 19.5% and was continuing to drop. The crew was pulled from the area until the ventilation could be fixed and the oxygen content was restored to above 19.5%.

  2. accident220262740008

    HOISTING · ACCIDENT ONLY

    Accident narrative

    While putting a drilling machine on the cage to be hoisted out the cage faults causing it to drop roughly 3 feet until the safety system set the brakes.

  3. accident220262590020

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    A roof fall occurred in the tailgate bleeder entry of the longwall. The tailgate entry was cut off sites causing the shear to extend into the entry further than normal. This causing the shear to cut out the crib in the tailgate.

  4. accident220262650001

    OTHER · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee turned and started to walk when EE felt a pain in EE's knee.

  5. accident220262590018

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    While supervisor was going in to preshift the area of the initial K order so the crew could go in and start working on mitigating the fall that occurred on 9-4-2026 they found that another area had fallen. A plan has been submitted to MSHA and rehabilitation work is ongoing.

  6. accident220262590017

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    A roof fall occurred in the tailgate bleeder entry of the longwall that was above anchor point. The fall was not in an active working area, nobody was injured, and it did not affect ventilation. The event occurred because the entry was cut off sites causing the shear to extend further than normal when cutting out the tailgate.

  7. accident220262520027

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    While inspecting the return a roof fall was found in 1 entry at 0 cross cut of the 458 North area. The area was flagged off, no injuries reported, and ventilation was not disrupted.

  8. accident220262290012

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Staging a 420 lbs. stainless pipe. After hoisting the pipe up to the 3rd floor, employees had to pull the pipe about 50 feet to the next lifting point. Pipe got caught on grating; employee felt pain in left shoulder.

  9. accident220262040017

    SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee stepped on an old splice that was under trona. When they stepped on the belt their ankle rolled inward.

  10. accident220262040016

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was resetting the G2 crusher. As employee was closing the crusher they felt a pop in (R) shoulder.

  11. accident220261770019

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee had the expando rail up in the air and took a step while holding the expando rail and stepped in a hole then the expando rail struck their left shoulder.

  12. accident220261560001

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    Intersection in the tailgate of the longwall fell above anchor point. Ventilation was not disrupted, nobody was injured, and the longwall has mined through the bad area.

  13. accident220261520024

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    Tailgate intersection fell above anchor point. Ventilation was not disrupted, no employees were trapped or injured. The longwall continued to mine to get through the fall area.

  14. accident220261420001

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was guiding the cable rope into the spool. EE's finger was pulled into the spool crushing the end of EE's finger resulting in a broken index finger and stitches.

  15. accident220261410025

    HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee was working in an awkward position trying to replace a bad hydraulic hose for multiple hours. EE was laying on EE's stomach and reaching into the access door. After work was completed, employee reported a back strain.

  16. accident220261250020

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    The longwall operators were cutting high in the tailgate causing the shear to cut out roof support (bolts). This roof fall occurred in the tailgate (bleeder) no employees were trapped, injured, and air was not disrupted by the event.

  17. accident220261180029

    POWERED HAULAGE · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee was operating a forklift steering wheel with EE's left hand when EE felt a pop in EE's shoulder.

  18. accident220261100027

    FALL OF ROOF OR BACK · ACCIDENT ONLY

    Accident narrative

    A roof fall occurred in the longwall tailgate that went above anchor point. Ventilation was not interrupted, no miners were trapped, and no injuries occurred. The area where the roof fall occurred is a bleeder and is not a working area but the roof fall did extend passed the anchor point.

  19. accident220260930007

    EXPLODING VESSELS UNDER PRESSURE · DAYS AWAY FROM WORK ONLY

    Accident narrative

    Employee opened an angle cock valve on the back of a rail car to bleed pressure. while opening the valve the hose whipped up and struck their elbow.

  20. accident220260930008

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    The employee was operating a warm water return valve and felt pain in their lower back.

  21. accident220260930006

    SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Working on the mono drop-out line had the guzzler hose down into the ditch, propped up on EE's knee, then EE twisted EE's knee and felt a pop.

  22. accident220260890017

    ENTRAPMENT · ACCIDENT ONLY

    Accident narrative

    The incoming power from Rocky Mountain Power had a double tie line that tripped power. This event was not produced by any equipment or process failures on WeSoda side. RMP sent linemen out to address and fix the issue.

  23. accident220260760005

    HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY

    Accident narrative

    EE reached out with EE's left arm to lift up a rolled up hose hanging on a hook at 6' 4" and felt a pop in EE's elbow. When EE sat the hose down EE's elbow popped again.

  24. accident220260720010

    HOISTING · ACCIDENT ONLY

    Accident narrative

    A piece of longwall equipment was loaded on the cage that exceeded the weight compacity by 500lbs and while it was being hoisted out of the mine the motor faulted out causing the breaks to set while in motion and the ropes slipped.

  25. accident220260710017

    FALL OF ROOF OR BACK · NO DYS AWY FRM WRK,NO RSTR ACT

    Accident narrative

    Employee had just scaled the top went to step forward to bar down another piece, and a small thin piece of trona fell striking and cutting their upper lip. Employee received 5 stitches.

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.

CURRENT HIERARCHYWE Soda US LLC → WE Soda Alkali, LLC → WE Soda @ WESTVACO
HISTORY RECORDS410 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

WE Soda US LLCcontrolsWE Soda Alkali, LLCoperatesWE Soda @ WESTVACO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4800152
—

Genesis Energy LPcontrolsWE Soda Alkali, LLCoperatesWE Soda @ WESTVACO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4800152
—

Tronox LimitedcontrolsWE Soda Alkali, LLCoperatesWE Soda @ WESTVACO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4800152
—

FMC CorpcontrolsFMC CorpoperatesWE Soda @ WESTVACO

msha-controller-operator-history · controller/operator co-tenure derived on mine 4800152
Other 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

664 historical accident/injury rows; 1 coded fatalities and 17,676 lost days across the published record.

ACCIDENT + INJURY RECORD143 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

4,357 violation rows across the full record; 742 carry an S&S flag and $2,169,424 appears in current assessed amounts.

ENFORCEMENT ACTIVITY1,488 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

320 personal; 25 area. 32 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 EXPOSURE345 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

387K employee hours and 679 summed average employees across reported subunits in the latest published quarter.

2026-Q20 tons
mine-production-quarterlymine-production-yearly
05 / LEGALwatch

Contests, conferences and decisions

446 contested-violation rows, 445 civil-penalty docket/decision rows, and 185 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE1,076 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions
06 / 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 CONTEXT76 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

2,185 inspection events and 51K published inspection hours across the historical record.

OVERSIGHT COVERAGE562 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records100 coal · 10 personal · 0 area
Sample status0 not voided0 voided · 10 status not reported
Personal samples with C/E > 1210 published ratios · not a citation count
2026 · Jan 7, 2026–Jun 29, 2026
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished action
000000202602661300Metal/nonmetal personalQuartz, respirable, >1% QtzForklift Operator0.4× published limitConcentration: 0001.19 · limit: 0002.94Source unit unspecifiedNot reportedNO ACTIONInspection F019AF7
000000202600515300Metal/nonmetal personalQuartz, respirable, >1% QtzBagging Operator0× published limitConcentration: 0000.34 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600467900Metal/nonmetal personalQuartz, respirable, >1% QtzSupervisor, Co. Official0.42× published limitConcentration: 0001.08 · limit: 0002.56Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600468000Metal/nonmetal personalQuartz, respirable, >1% QtzRoof Bolter, Mounted0.81× published limitConcentration: 0001.88 · limit: 0002.33Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600468200Metal/nonmetal personalQuartz, respirable, >1% QtzShuttle Car Operator (diesel)1.33× published limitConcentration: 0004.30 · limit: 0003.23Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F045120
000000202600468300Metal/nonmetal personalQuartz, respirable, >1% QtzShuttle Car Operator (diesel)1.35× published limitConcentration: 0003.86 · limit: 0002.86Source unit unspecifiedNot reportedLAB RESULTS INDICATE EXPOSURE LIMIT EXCEEDEDInspection F045120
000000202600037900Metal/nonmetal personalQuartz, respirable, >1% QtzElectrician0× published limitConcentration: 0000.54 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600038000Metal/nonmetal personalQuartz, respirable, >1% QtzElectrician0× published limitConcentration: 0000.23 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600038100Metal/nonmetal personalQuartz, respirable, >1% QtzElectrician0× published limitConcentration: 0000.23 · limit: 0000.00Source unit unspecifiedNot reportedNO ACTIONInspection F045120
000000202600044700Metal/nonmetal personalQuartz, respirable, >1% QtzBelt Crew0.54× published limitConcentration: 0001.46 · limit: 0002.70Source unit unspecifiedNot reportedNO ACTIONInspection F014CDF
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.

RECENT PUBLIC RECORDS

Recent violations and samples

Latest records retained for inspection; aggregates above use the full source history.

VIOLATIONS12 latest shown
5058061—Order
505169857.12028Citation
510784857.20011Citation
510784757.11027Citation
510784657.12032Citation
510784557.12002S&S
510784447.41(a)Citation
510784347.41(a)Citation
OTHER HEALTH SAMPLES8 latest shown

Coal dust, noise and other contaminants. Silica records above ↑

Nuisance dust, respirable, <1% QtzUtility Man
C/E: 00.05Concentration: 0000.46 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgHydrating Plant Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzForklift Operator
C/E: 00.00Concentration: 0002.64 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzCrusher Oper/Worker
C/E: 00.00Concentration: 0000.15 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzLaborer, Bullgang
C/E: 00.00Concentration: 0001.18 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzBulldozer Operator
C/E: 00.00Concentration: 0000.21 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzLaborer, Bullgang
C/E: 00.00Concentration: 0000.24 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzShuttle Car Operator (diesel)
C/E: 00.00Concentration: 0003.61 · limit: 0000.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

16 datasets contain linked records. Missing datasets are listed below.

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors664Jan 4, 2000—Sep 29, 2026mine-keyed
Addresses of Recordidentity · logistics1Jul 4, 1976—Jul 4, 1976mine-keyed
Assessed Violationscompliance · legal4,302Jan 13, 2000—Aug 29, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal445Jan 14, 2002—Jul 15, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal185Apr 25, 2000—Feb 12, 2025mine-keyed
Contested Violationscompliance · legal446Dec 8, 2003—Feb 5, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety11,009Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety2,305Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Mar 9, 1978—Apr 1, 2015mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance383Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance98Not published—Not publishedmine-keyed
Inspectionssafety · compliance2,185Jan 4, 2000—Oct 13, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety25Jan 18, 2007—Dec 11, 2025mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety320Apr 4, 2001—Jun 30, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal4,357Jan 13, 2000—Sep 4, 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.