# Immel Mine

- **MSHA mine ID:** 4000170
- **Status:** Active
- **Type / commodity:** Underground / Zinc
- **Location:** Knox, TN
- **Operator:** Crucible ETN LLC
- **Controller:** Korea Zinc Co Ltd
- **Public source rows linked:** 7,293
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Korea Zinc Co Ltd (0199521) → Crucible ETN LLC (0208493) → Immel Mine (4000170)**

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 4000170; 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 4000170; 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 4000170; 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 4000170; 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 4000170; 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 4000170; source `msha-controller-operator-history`.
- **Korea Zinc Co Ltd → Crucible ETN LLC:** 2026-04-21 through current/open; derived from co-tenure at mine 4000170; 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 — 23 since 2021:** Accidents and injuries 143 historical accident/injury rows; 3 coded fatalities and 1,543 lost days across the published record.
2. **COMPLIANCE — 420 since 2021:** Violations and penalties 941 violation rows across the full record; 218 carry an S&S flag and $602,176 appears in current assessed amounts.
3. **HEALTH — 478 samples:** Occupational health samples 413 personal; 65 area. 36 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 70K employee hours and 168 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 235 linked rows:** Contests, conferences and decisions 99 contested-violation rows, 98 civil-penalty docket/decision rows, and 38 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 — 78 since 2021:** Inspections 259 inspection events and 14K 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 57.14100 — Safety defects; examination, correction and records.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.14102 — Brakes for rail equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14102
- **30 CFR 57.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12002
- **30 CFR 57.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004
- **30 CFR 57.12030 — Correction of dangerous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12030
- **30 CFR 57.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-O/section-57.16005
- **30 CFR 57.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11001
- **30 CFR 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032

## Source coverage

- **Accident, Injuries, and Illnesses:** 143 rows; 2000-02-23 through 2026-01-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2007-10-29 through 2007-10-29; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 65 rows; 2011-03-21 through 2025-10-07; source ID `msha-area-samples`
- **Assessed Violations:** 917 rows; 2000-02-29 through 2026-08-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 98 rows; 2008-08-25 through 2024-05-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 38 rows; 2001-06-18 through 2026-06-17; source ID `msha-conferences`
- **Contested Violations:** 99 rows; 2007-07-23 through 2022-08-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 3,283 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 702 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:** 259 rows; 2000-02-07 through 2026-08-11; 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:** 63 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:** 413 rows; 2000-07-25 through 2026-02-03; source ID `msha-personal-health-samples`
- **Violations:** 941 rows; 2000-02-29 through 2026-08-17; 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/immel-mine-4000170`
- JSON: `/api/v1/mines/immel-mine-4000170`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000170/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000170/relationships`
- MCP resource: `mine://4000170/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`