# Fossil Rock Mine

- **MSHA mine ID:** 4201211
- **Status:** Active
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Emery, UT
- **Operator:** Fossil Rock Resources, LLC.
- **Controller:** Wolverine Fuels LLC
- **Public source rows linked:** 5,116
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Wolverine Fuels LLC (0110263) → Fossil Rock Resources, LLC. (0139473) → Fossil Rock Mine (4201211)**

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

## Controller and operator valid-time history

- **John  Bell → Trail Mountain Coal Company:** 1975-10-01 through 1978-12-31; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **Fetterolf Group Inc → Trail Mountain Coal Company:** 1979-01-01 through 1981-03-04; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **Natomas Company → Trail Mountain Coal Company:** 1981-03-05 through 1987-05-18; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **Ashland Inc et al → Arch Of Utah:** 1987-05-19 through 1987-09-30; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **Atlantic Richfield Company → Mountain Coal Company:** 1987-10-01 through 1992-10-04; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **MidAmerican Energy Holdings Company → Energy West Mining Company:** 1992-10-05 through 2015-06-04; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.
- **Wolverine Fuels LLC → Fossil Rock Resources, LLC.:** 2015-06-05 through current/open; derived from co-tenure at mine 4201211; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 21
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 11 since 2021:** Accidents and injuries 42 historical accident/injury rows; 0 coded fatalities and 954 lost days across the published record.
2. **COMPLIANCE — 246 since 2021:** Violations and penalties 370 violation rows across the full record; 40 carry an S&S flag and $100,985 appears in current assessed amounts.
3. **HEALTH — 2K samples:** Occupational health samples 2,188 coal dust; 71 coal quartz; 175 noise. 0 personal-sample rows have a published C/E ratio above 1; 25 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 41K employee hours and 86 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 19 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 17 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 48 since 2021:** Inspections 122 inspection events and 6K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 44,687 short tons
- **Labor hours:** 107,144
- **Average employees:** 63
- **Coal supply region:** Uinta Region
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 75.503 — Permissible electric face equipment; maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.503
- **30 CFR 75.1725 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1725
- **30 CFR 75.370 — Mine ventilation plan; submission and approval.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.370
- **30 CFR 75.380 — Escapeways; bituminous and lignite mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.380
- **30 CFR 75.333 — Ventilation controls.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.333
- **30 CFR 75.403 — Maintenance of incombustible content of rock dust.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.403
- **30 CFR 75.601-1 — Short circuit protection; ratings and settings of circuit breakers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-G/section-75.601-1
- **30 CFR 75.402 — Rock dusting.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.402
- **30 CFR 75.512 — Electric equipment; examination, testing and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512
- **30 CFR 75.904 — Identification of circuit breakers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-J/section-75.904

## Source coverage

- **Accident, Injuries, and Illnesses:** 42 rows; 2000-01-06 through 2026-09-18; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2024-09-04 through 2024-09-04; source ID `msha-addresses`
- **Assessed Violations:** 350 rows; 2000-01-04 through 2026-09-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; unknown through unknown; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 2,188 rows; 2000-01-04 through 2026-10-14; source ID `msha-coal-dust-samples`
- **Conferences:** 17 rows; 2000-08-03 through 2016-12-08; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2025-12-01 through 2025-12-01; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,405 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 332 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1975-10-01 through 2015-06-05; source ID `msha-controller-operator-history`
- **Inspections:** 122 rows; 2000-01-05 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 18 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 15 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 175 rows; 2000-11-28 through 2026-09-17; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 71 rows; 2000-02-08 through 2026-09-17; source ID `msha-quartz-samples`
- **Violations:** 370 rows; 2000-01-04 through 2026-10-09; 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/fossil-rock-mine-4201211`
- JSON: `/api/v1/mines/fossil-rock-mine-4201211`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4201211/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4201211/relationships`
- MCP resource: `mine://4201211/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`