MSHA DATABASEMSHA records · 16 contributing sources · snapshot Oct 13, 2026

MINE DETAILS

Young Mine

ActiveUndergroundZinc
MSHA MINE ID4000168
LOCATIONJefferson, TN
PUBLIC RECORD8,299 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 – 2026-10-13Applies to production, safety and portfolio metrics. Silica samples have separate filters.

Violations

54

7 significant & substantial (S&S)

  1. 2025 Q18
  2. 2025 Q27
  3. 2025 Q38
  4. 2025 Q411
  5. 2026 Q111
  6. 2026 Q28
  7. 2026 Q31
  8. 2026 Q4 *0

Accident records

6

1 records classified as fatality

  1. 2025 Q10
  2. 2025 Q21
  3. 2025 Q33
  4. 2025 Q40
  5. 2026 Q10
  6. 2026 Q20
  7. 2026 Q32
  8. 2026 Q4 *0

Proposed penalties · USD

22,779.00

52 of 54 violations with amounts

  1. 2025 Q12,061
  2. 2025 Q22,563
  3. 2025 Q31,309
  4. 2025 Q42,014
  5. 2026 Q112,313
  6. 2026 Q22,368
  7. 2026 Q3151
  8. 2026 Q4 *—

On-site inspection hours

804.50

18 inspections · 18 with hours

  1. 2025 Q176.00
  2. 2025 Q285.50
  3. 2025 Q3278.00
  4. 2025 Q4101.50
  5. 2026 Q1115.00
  6. 2026 Q282.25
  7. 2026 Q366.25
  8. 2026 Q4 *—
Quarterly safety data
QuarterViolationsS&SProposed USDAccident recordsFatality recordsInspectionsOn-site hours
2025-Q1812,061.0000176.0
2025-Q2702,563.0010285.5
2025-Q3811,309.00314278.0
2025-Q41112,014.00002101.5
2026-Q111212,313.00004115.0
2026-Q2822,368.0000382.3
2026-Q310151.0020266.3
2026-Q4 *00—000—

Most cited CFR sections

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

Safety activity

  1. inspectionF030996

    Verbal Hazard Complaint Inspections · 1.0 on-site hours

  2. accident220262660025

    DISORDERS (PHYSICAL AGENTS) · OCCUPATNAL ILLNESS NOT DEG 1-6

    Accident narrative

    Code 25 - Heat Exhaustion During the mine rescue scenario at the mine rescue training facility, an employee was practicing first aid on a patient when they got overheated and stood up, which resulted in them getting dizzy. The mine rescue scenario was stopped and the employee was taken to the EMS unit that was on site.

  3. accident220262610015

    HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY

    Accident narrative

    Employee was tightening hydraulic line when they felt a pop in their wrists

  4. inspectionF043E0F

    Regular Safety and Health Inspection · 65.3 on-site hours

  5. violation5087779

    57.11002 · $151.00 proposed

  6. inspectionF023459

    Verbal Hazard Complaint Inspections · 1.5 on-site hours

  7. violation5087750

    57.3200 · $151.00 proposed

  8. violation5087960

    57.6202(a)(5) · $151.00 proposed

  9. violation5087749

    57.14112(a)(1) · $151.00 proposed

  10. violation5087748

    57.9302 · $151.00 proposed

  11. inspectionF031088

    Regular Safety and Health Inspection · 78.8 on-site hours

  12. violation5087959

    57.14100(b) · $151.00 proposed

  13. violation5087958

    57.4201(a)(2) · $151.00 proposed

  14. violation5087957

    57.12030 · S&S · $1,126.00 proposed

  15. violation5087747

    57.20003(a) · S&S · $336.00 proposed

  16. inspectionF03E1FE

    Verbal Hazard Complaint Inspections · 2.0 on-site hours

  17. inspectionF012891

    Verbal Hazard Complaint Inspections · 5.3 on-site hours

  18. inspectionF01288E

    Verbal Hazard Complaint Inspections · 5.5 on-site hours

  19. violation5087446

    57.14100(b) · $151.00 proposed

  20. inspectionF00BB78

    Spot Inspection · 0.0 on-site hours

  21. violation9286947

    57.3200 · S&S · $3,184.00 proposed

  22. violation9286949

    50.10(b) · $7,555.00 proposed

  23. violation5087932

    57.11001 · S&S · $366.00 proposed

  24. violation5087740

    57.4201(a)(1) · $151.00 proposed

  25. violation5087931

    57.14100(b) · $151.00 proposed

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.

CURRENT HIERARCHYKorea Zinc Co Ltd → Crucible ETN LLC → Young Mine
HISTORY RECORDS718 relationships
INTERVAL CHECKPASScontroller/operator overlap
—

Korea Zinc Co LtdcontrolsCrucible ETN LLCoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Nyrstar Netherlands Holdings B.V.controlsNyrstar Tennessee Mines, Strawberry Plains LLCoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Nyrstar US InccontrolsNyrstar Tennessee Mines, Strawberry Plains LLCoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Nyrstar NVcontrolsNyrstar Tennessee Mines, Strawberry Plains LLCoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Tennessee Zinc Company LLCcontrolsNyrstar Tennessee Mines, Strawberry Plains LLCoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Grupo Mexico S A B de C VcontrolsAsarco IncoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
—

Asarco InccontrolsAsarco IncoperatesYoung Mine

msha-controller-operator-history · controller/operator co-tenure derived on mine 4000168
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

119 historical accident/injury rows; 2 coded fatalities and 1,998 lost days across the published record.

ACCIDENT + INJURY RECORD28 since 2021
accidentsmine-production-quarterly
02 / COMPLIANCEwatch

Violations and penalties

756 violation rows across the full record; 212 carry an S&S flag and $331,500 appears in current assessed amounts.

ENFORCEMENT ACTIVITY256 since 2021
inspectionsviolationsassessed-violationsorders-107a
03 / HEALTHwatch

Occupational health samples

419 personal; 141 area. 38 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 EXPOSURE560 samples
personal-health-samplesarea-samples
04 / PRODUCTIONcontext

Quarterly production and employment

69K employee hours and 167 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

105 contested-violation rows, 104 civil-penalty docket/decision rows, and 18 conference records linked by issuance number.

POST-ISSUANCE LIFECYCLE227 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 CONTEXT16 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations
07 / INSPECTIONScontext

Inspections

221 inspection events and 12K published inspection hours across the historical record.

OVERSIGHT COVERAGE59 since 2021
inspectionsviolations

HEALTH SAMPLING

Silica and quartz

Matching records00 coal · 0 personal · 0 area
Sample status0 not voided0 voided · 0 status not reported
Personal samples with C/E > 1—0 published ratios · not a citation count
2026 · No reported dates in this selection
Date / sampleDataset / analyteOccupation / areaMeasurementSample statusPublished 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.

RECENT PUBLIC RECORDS

Recent violations and samples

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

VIOLATIONS12 latest shown
508777957.11002Citation
508775057.3200Citation
508796057.6202(a)(5)Citation
508774957.14112(a)(1)Citation
508774857.9302Citation
508795957.14100(b)Citation
508795857.4201(a)(2)Citation
508795757.12030S&S
OTHER HEALTH SAMPLES8 latest shown

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

TC from EC @ 160Roof Bolter, Rock
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Roof Bolter, Rock
C/E: 00.35Concentration: 0056.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONRoof Bolter, Rock
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Roof Bolter, Rock
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Front-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Front-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Front-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified

SOURCE COVERAGE

Reporting dates and coverage

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

DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors119Jan 11, 2000—Sep 18, 2026mine-keyed
Addresses of Recordidentity · logistics1Jan 19, 2007—Jan 19, 2007mine-keyed
Assessed Violationscompliance · legal744Feb 8, 2000—Jul 27, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal104Jan 8, 2008—Nov 20, 2023mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal18Feb 28, 2000—Jul 11, 2022mine-keyed
Contested Violationscompliance · legal105Feb 14, 2007—Feb 13, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety4,359Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety976Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance7Jan 1, 1950—Apr 21, 2026mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance263Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance65Not published—Not publishedmine-keyed
Inspectionssafety · compliance221Feb 7, 2000—Sep 28, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety141Mar 15, 2012—Feb 19, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety419Jun 20, 2001—Feb 19, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal756Feb 8, 2000—Jul 27, 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.