# Yellowstone Mine

- **MSHA mine ID:** 2400163
- **Status:** Active
- **Type / commodity:** Surface / Talc
- **Location:** Madison, MT
- **Operator:** Magris Talc USA, Inc.
- **Controller:** Magris Performance Materials Inc
- **Public source rows linked:** 1,589
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Magris Performance Materials Inc (0160541) → Magris Talc USA, Inc. (0175353) → Yellowstone Mine (2400163)**

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

## Controller and operator valid-time history

- **Cyprus Mines Corp → Cyprus Industrial Minerals Company:** 1950-01-01 through 1980-09-21; derived from co-tenure at mine 2400163; source `msha-controller-operator-history`.
- **Cyprus Amax Minerals Company → Cyprus Industrial Minerals Company:** 1980-09-22 through 1992-06-30; derived from co-tenure at mine 2400163; source `msha-controller-operator-history`.
- **Rio Tinto Group → Imerys Talc Incorporated:** 1992-07-01 through 2011-07-31; derived from co-tenure at mine 2400163; source `msha-controller-operator-history`.
- **Imerys S A → Imerys Talc Incorporated:** 2011-08-01 through 2021-02-16; derived from co-tenure at mine 2400163; source `msha-controller-operator-history`.
- **Magris Performance Materials Inc → Magris Talc USA, Inc.:** 2021-02-17 through current/open; derived from co-tenure at mine 2400163; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 14
- 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 — 9 since 2021:** Accidents and injuries 32 historical accident/injury rows; 0 coded fatalities and 57 lost days across the published record.
2. **COMPLIANCE — 26 since 2021:** Violations and penalties 182 violation rows across the full record; 29 carry an S&S flag and $32,024 appears in current assessed amounts.
3. **HEALTH — 28 samples:** Occupational health samples 28 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.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 18K employee hours and 36 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 17 since 2021:** Inspections 72 inspection events and 2K 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 56.13030 — Boilers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13030
- **30 CFR 50.20-7 — Criteria—MSHA Form 7000-1, Section D.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20-7
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.4330 — Firefighting, evacuation, and rescue procedures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4330
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100

## Source coverage

- **Accident, Injuries, and Illnesses:** 32 rows; 2000-10-12 through 2026-07-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-11-18 through 2014-11-18; source ID `msha-addresses`
- **Assessed Violations:** 182 rows; 2000-05-23 through 2026-06-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2011-08-16 through 2011-08-16; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2001-06-12 through 2022-01-14; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2010-01-20 through 2010-01-20; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 681 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 135 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2021-02-17; source ID `msha-controller-operator-history`
- **Inspections:** 72 rows; 2000-01-04 through 2026-06-24; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 28 rows; 2003-08-06 through 2025-08-27; source ID `msha-personal-health-samples`
- **Violations:** 182 rows; 2000-05-23 through 2026-06-25; 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/yellowstone-mine-2400163`
- JSON: `/api/v1/mines/yellowstone-mine-2400163`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2400163/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2400163/relationships`
- MCP resource: `mine://2400163/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`