# Emery Valley Mine

- **MSHA mine ID:** 4200079
- **Status:** Active
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Emery, UT
- **Operator:** Emery Valley Resources, LLC.
- **Controller:** Wolverine Fuels LLC
- **Public source rows linked:** 17,939
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Wolverine Fuels LLC (0110263) → Emery Valley Resources, LLC. (0207813) → Emery Valley Mine (4200079)**

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

## Controller and operator valid-time history

- **Petty Horace A → Browning Coal Co:** 1950-01-01 through 1975-05-12; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **CONSOL Energy Inc → Consolidation Coal Company:** 1975-05-13 through 2013-12-04; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **Robert E  Murray → Consolidation Coal Company:** 2013-12-05 through 2013-12-05; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **CONSOL Energy Inc → CONSOL Mining Company LLC:** 2013-12-06 through 2015-12-31; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **Bronco Coal Resources, LLC → Bronco Utah Operations, LLC.:** 2016-01-01 through 2026-02-16; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **Core Natural Resources Inc → CONSOL Mining Company LLC:** 2025-01-14 through 2015-12-31; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.
- **Wolverine Fuels LLC → Emery Valley Resources, LLC.:** 2026-02-17 through current/open; derived from co-tenure at mine 4200079; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 19
- Interval anomalies: 1
- 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 — 73 since 2021:** Accidents and injuries 143 historical accident/injury rows; 0 coded fatalities and 1,984 lost days across the published record.
2. **COMPLIANCE — 1,568 since 2021:** Violations and penalties 2,916 violation rows across the full record; 510 carry an S&S flag and $1,994,823 appears in current assessed amounts.
3. **HEALTH — 7K samples:** Occupational health samples 6,156 coal dust; 260 coal quartz; 562 noise. 0 personal-sample rows have a published C/E ratio above 1; 48 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 — 315K tons:** Quarterly production and employment 75K employee hours and 155 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1,915 linked rows:** Contests, conferences and decisions 923 contested-violation rows, 928 civil-penalty docket/decision rows, and 64 conference records linked by issuance number.
6. **CONTRACTORS — 14 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 — 62 since 2021:** Inspections 393 inspection events and 30K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 1,064,605 short tons
- **Labor hours:** 505,103
- **Average employees:** 226
- **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 75.1600-2 — Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-Q/section-75.1600-2
- **30 CFR 75.1100-3 — Condition and examination of firefighting equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-3
- **30 CFR 75.370 — Mine ventilation plan; submission and approval.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.370
- **30 CFR 75.1702 — Smoking; prohibition.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1702
- **30 CFR 77.1605 — Loading and haulage equipment; installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **30 CFR 70.210 — Respirable dust samples; transmission by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-70/subpart-C/section-70.210
- **30 CFR 77.505 — Cable fittings; suitability.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.505
- **30 CFR 75.1100-2 — Quantity and location of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-2
- **30 CFR 75.1909 — Nonpermissible diesel-powered equipment; design and performance requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1909

## Source coverage

- **Accident, Injuries, and Illnesses:** 143 rows; 2001-01-22 through 2026-07-25; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2017-09-19 through 2017-09-19; source ID `msha-addresses`
- **Assessed Violations:** 2,738 rows; 2001-01-23 through 2025-11-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 928 rows; 2004-12-28 through 2026-09-30; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 6,156 rows; 2002-12-30 through 2030-11-29; source ID `msha-coal-dust-samples`
- **Conferences:** 64 rows; 2001-03-27 through 2023-12-15; source ID `msha-conferences`
- **Contested Violations:** 923 rows; 2007-04-27 through 2025-11-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,021 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 428 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 2026-02-17; source ID `msha-controller-operator-history`
- **Inspections:** 393 rows; 2000-11-09 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 334 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 64 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 562 rows; 2002-09-05 through 2026-08-19; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 260 rows; 2002-12-30 through 2026-08-19; source ID `msha-quartz-samples`
- **Violations:** 2,916 rows; 2001-01-23 through 2026-10-05; 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/emery-valley-mine-4200079`
- JSON: `/api/v1/mines/emery-valley-mine-4200079`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4200079/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4200079/relationships`
- MCP resource: `mine://4200079/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`