# Young Mine

- **MSHA mine ID:** 4000168
- **Status:** Active
- **Type / commodity:** Underground / Zinc
- **Location:** Jefferson, TN
- **Operator:** Crucible ETN LLC
- **Controller:** Korea Zinc Co Ltd
- **Public source rows linked:** 8,299
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Korea Zinc Co Ltd (0199521) → Crucible ETN LLC (0208493) → Young Mine (4000168)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Asarco Inc → Asarco Inc:** 1950-01-01 through 1999-11-16; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Grupo Mexico S A B de C V → Asarco Inc:** 1999-11-17 through 2006-06-08; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Tennessee Zinc Company LLC → Nyrstar Tennessee Mines, Strawberry Plains LLC:** 2006-06-09 through 2009-12-06; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Nyrstar NV → Nyrstar Tennessee Mines, Strawberry Plains LLC:** 2009-12-07 through 2022-09-30; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Nyrstar US Inc → Nyrstar Tennessee Mines, Strawberry Plains LLC:** 2022-10-01 through 2024-10-23; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Nyrstar Netherlands Holdings B.V. → Nyrstar Tennessee Mines, Strawberry Plains LLC:** 2024-10-24 through 2026-04-20; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.
- **Korea Zinc Co Ltd → Crucible ETN LLC:** 2026-04-21 through current/open; derived from co-tenure at mine 4000168; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 18
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 28 since 2021:** Accidents and injuries 119 historical accident/injury rows; 2 coded fatalities and 1,998 lost days across the published record.
2. **COMPLIANCE — 256 since 2021:** Violations and penalties 756 violation rows across the full record; 212 carry an S&S flag and $331,500 appears in current assessed amounts.
3. **HEALTH — 560 samples:** 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.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 69K employee hours and 167 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 227 linked rows:** Contests, conferences and decisions 105 contested-violation rows, 104 civil-penalty docket/decision rows, and 18 conference records linked by issuance number.
6. **CONTRACTORS — 16 linked entities:** 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.
7. **INSPECTIONS — 59 since 2021:** Inspections 221 inspection events and 12K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 57.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11002
- **30 CFR 57.3200 — Correction of hazardous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3200
- **30 CFR 57.6202 — Vehicles.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6202
- **30 CFR 57.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14112
- **30 CFR 57.9302 — Protection against moving or runaway railroad equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-H/section-57.9302
- **30 CFR 57.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4201
- **30 CFR 57.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12030
- **30 CFR 57.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20003
- **30 CFR 50.10 — Immediate notification.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-B/section-50.10

## Source coverage

- **Accident, Injuries, and Illnesses:** 119 rows; 2000-01-11 through 2026-09-18; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2007-01-19 through 2007-01-19; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 141 rows; 2012-03-15 through 2026-02-19; source ID `msha-area-samples`
- **Assessed Violations:** 744 rows; 2000-02-08 through 2026-07-27; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 104 rows; 2008-01-08 through 2023-11-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 18 rows; 2000-02-28 through 2022-07-11; source ID `msha-conferences`
- **Contested Violations:** 105 rows; 2007-02-14 through 2026-02-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,359 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 976 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 2026-04-21; source ID `msha-controller-operator-history`
- **Inspections:** 221 rows; 2000-02-07 through 2026-09-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 263 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 65 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 419 rows; 2001-06-20 through 2026-02-19; source ID `msha-personal-health-samples`
- **Violations:** 756 rows; 2000-02-08 through 2026-07-27; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/young-mine-4000168`
- JSON: `/api/v1/mines/young-mine-4000168`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000168/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000168/relationships`
- MCP resource: `mine://4000168/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`