# SKYLINE MINE #3

- **MSHA mine ID:** 4201566
- **Status:** Active
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Carbon, UT
- **Operator:** CANYON FUEL COMPANY LLC
- **Controller:** Wolverine Fuels LLC
- **Public source rows linked:** 32,830
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Wolverine Fuels LLC (0110263) → CANYON FUEL COMPANY LLC (P23684) → SKYLINE MINE #3 (4201566)**

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

## Controller and operator valid-time history

- **El Paso Energy Corp → Utah Fuel Company:** 1979-01-01 through 1996-12-19; derived from co-tenure at mine 4201566; source `msha-controller-operator-history`.
- **Arch Resources Inc → Canyon Fuel Company LLC:** 1996-12-20 through 2013-08-16; derived from co-tenure at mine 4201566; source `msha-controller-operator-history`.
- **Wolverine Fuels LLC → Canyon Fuel Company LLC:** 2013-08-17 through current/open; derived from co-tenure at mine 4201566; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 — 58 since 2021:** Accidents and injuries 214 historical accident/injury rows; 1 coded fatalities and 4,045 lost days across the published record.
2. **COMPLIANCE — 1,492 since 2021:** Violations and penalties 4,214 violation rows across the full record; 656 carry an S&S flag and $2,887,939 appears in current assessed amounts.
3. **HEALTH — 18K samples:** Occupational health samples 16,491 coal dust; 688 coal quartz; 840 noise. 0 personal-sample rows have a published C/E ratio above 1; 139 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 — 36K tons:** Quarterly production and employment 49K employee hours and 96 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 381 linked rows:** Contests, conferences and decisions 121 contested-violation rows, 146 civil-penalty docket/decision rows, and 114 conference records linked by issuance number.
6. **CONTRACTORS — 23 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 — 113 since 2021:** Inspections 491 inspection events and 63K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 2,963,808 short tons
- **Labor hours:** 876,795
- **Average employees:** 414
- **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 75.1100-3 — Condition and examination of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-3
- **30 CFR 77.1110 — Examination and maintenance of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110
- **30 CFR 77.512 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.512
- **30 CFR 41.20 — Legal identity report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-C/section-41.20
- **30 CFR 75.1731 — Maintenance of belt conveyors and belt conveyor entries.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1731
- **30 CFR 75.400 — Accumulation of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.400
- **30 CFR 77.502 — Electric equipment; examination, testing, and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502
- **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 75.222 — Roof control plan-approval criteria.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.222
- **30 CFR 75.202 — Protection from falls of roof, face and ribs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202
- **30 CFR 75.1913 — Starting aids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1913

## Source coverage

- **Accident, Injuries, and Illnesses:** 214 rows; 2000-02-06 through 2026-08-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-12-27 through 2023-12-27; source ID `msha-addresses`
- **Assessed Violations:** 4,149 rows; 2000-01-04 through 2026-08-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 146 rows; 2000-05-25 through 2026-08-18; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 16,491 rows; 2000-01-03 through 2026-10-07; source ID `msha-coal-dust-samples`
- **Conferences:** 114 rows; 2001-04-26 through 2026-07-07; source ID `msha-conferences`
- **Contested Violations:** 121 rows; 2001-04-09 through 2025-07-01; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,046 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 817 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1979-01-01 through 1996-12-20; source ID `msha-controller-operator-history`
- **Inspections:** 491 rows; 2000-01-03 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 412 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 82 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 840 rows; 2001-04-18 through 2026-08-17; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 688 rows; 2000-01-19 through 2026-07-08; source ID `msha-quartz-samples`
- **Violations:** 4,214 rows; 2000-01-04 through 2026-10-07; 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/skyline-mine-3-4201566`
- JSON: `/api/v1/mines/skyline-mine-3-4201566`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4201566/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4201566/relationships`
- MCP resource: `mine://4201566/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`