# Wyodak Mine

- **MSHA mine ID:** 4800083
- **Status:** Active
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Campbell, WY
- **Operator:** Black Hills Energy
- **Controller:** Black Hills Corp
- **Public source rows linked:** 7,022
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Black Hills Corp (C03845) → Black Hills Energy (P04662) → Wyodak Mine (4800083)**

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

## Controller and operator valid-time history

- **Black Hills Corp → Black Hills Energy:** 1950-01-01 through current/open; derived from co-tenure at mine 4800083; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 — 6 since 2021:** Accidents and injuries 59 historical accident/injury rows; 1 coded fatalities and 318 lost days across the published record.
2. **COMPLIANCE — 60 since 2021:** Violations and penalties 316 violation rows across the full record; 54 carry an S&S flag and $191,687 appears in current assessed amounts.
3. **HEALTH — 775 samples:** Occupational health samples 560 coal dust; 8 coal quartz; 207 noise. 0 personal-sample rows have a published C/E ratio above 1; 2 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 — 853K tons:** Quarterly production and employment 21K employee hours and 53 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 23 linked rows:** Contests, conferences and decisions 10 contested-violation rows, 10 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 25 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 — 18 since 2021:** Inspections 131 inspection events and 6K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 3,686,049 short tons
- **Labor hours:** 88,664
- **Average employees:** 53
- **Coal supply region:** Powder River Basin
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **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 77.1102 — Warning signs; smoking and open flame.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1102
- **30 CFR 77.1607 — Loading and haulage equipment; operation.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1607
- **30 CFR 77.1710 — Protective clothing; requirements.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1710
- **30 CFR 77.202 — Dust accumulations in surface installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.202
- **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 77.502 — Electric equipment; examination, testing, and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502
- **30 CFR 77.410 — Mobile equipment; automatic warning devices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 77.701 — Grounding metallic frames, casings, and other enclosures of electric equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-H/section-77.701

## Source coverage

- **Accident, Injuries, and Illnesses:** 59 rows; 2000-02-24 through 2026-08-08; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1925-01-01 through 1925-01-01; source ID `msha-addresses`
- **Assessed Violations:** 310 rows; 2002-05-02 through 2026-08-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2010-10-20 through 2013-12-04; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 560 rows; 2000-06-08 through 2026-08-20; source ID `msha-coal-dust-samples`
- **Conferences:** 3 rows; 2012-07-10 through 2016-05-03; source ID `msha-conferences`
- **Contested Violations:** 10 rows; 2008-05-19 through 2013-01-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,090 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 954 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 131 rows; 2000-06-06 through 2026-08-03; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 306 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 55 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 207 rows; 2000-06-07 through 2026-08-11; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 8 rows; 2006-03-07 through 2022-01-20; source ID `msha-quartz-samples`
- **Violations:** 316 rows; 2002-05-02 through 2026-08-20; 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/wyodak-mine-4800083`
- JSON: `/api/v1/mines/wyodak-mine-4800083`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4800083/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4800083/relationships`
- MCP resource: `mine://4800083/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`