# Three Oaks

- **MSHA mine ID:** 4104085
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Lignite)
- **Location:** Lee, TX
- **Operator:** Luminant Mining Company LLC
- **Controller:** Vistra Energy
- **Public source rows linked:** 6,729
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vistra Energy (0129941) → Luminant Mining Company LLC (P00650) → Three Oaks (4104085)**

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

## Controller and operator valid-time history

- **Alcoa Inc → Alcoa Incorporated:** 1999-07-01 through 2007-08-31; derived from co-tenure at mine 4104085; source `msha-controller-operator-history`.
- **TXU → Luminant Mining Company LLC:** 2007-09-01 through 2007-09-30; derived from co-tenure at mine 4104085; source `msha-controller-operator-history`.
- **Energy Future Holdings Corporation → Luminant Mining Company LLC:** 2007-10-01 through 2016-10-03; derived from co-tenure at mine 4104085; source `msha-controller-operator-history`.
- **Vistra Energy → Luminant Mining Company LLC:** 2016-10-04 through current/open; derived from co-tenure at mine 4104085; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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 — 3 since 2021:** Accidents and injuries 86 historical accident/injury rows; 0 coded fatalities and 1,223 lost days across the published record.
2. **COMPLIANCE — 10 since 2021:** Violations and penalties 397 violation rows across the full record; 86 carry an S&S flag and $186,215 appears in current assessed amounts.
3. **HEALTH — 410 samples:** Occupational health samples 273 coal dust; 3 coal quartz; 134 noise. 0 personal-sample rows have a published C/E ratio above 1; 4 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 510 employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 95 linked rows:** Contests, conferences and decisions 45 contested-violation rows, 45 civil-penalty docket/decision rows, and 5 conference records linked by issuance number.
6. **CONTRACTORS — 26 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 — 8 since 2021:** Inspections 125 inspection events and 9K 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 77.1104 — Accumulations of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.205 — Travelways at surface installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.205
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **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 77.410 — 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 77.208 — Storage of materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.208
- **30 CFR 77.1605 — Loading and haulage equipment; installations.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 86 rows; 2005-04-27 through 2022-09-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-10-10 through 2023-10-10; source ID `msha-addresses`
- **Assessed Violations:** 384 rows; 2004-09-13 through 2023-06-06; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 45 rows; 2006-01-30 through 2018-01-18; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 273 rows; 2005-02-16 through 2023-06-07; source ID `msha-coal-dust-samples`
- **Conferences:** 5 rows; 2007-09-10 through 2016-04-07; source ID `msha-conferences`
- **Contested Violations:** 45 rows; 2005-06-16 through 2017-04-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,125 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 884 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1999-07-01 through 2007-09-01; source ID `msha-controller-operator-history`
- **Inspections:** 125 rows; 2003-09-24 through 2023-10-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 177 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 40 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 134 rows; 2005-11-07 through 2023-06-07; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 3 rows; 2005-06-16 through 2017-12-04; source ID `msha-quartz-samples`
- **Violations:** 397 rows; 2004-09-13 through 2023-06-06; 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/three-oaks-4104085`
- JSON: `/api/v1/mines/three-oaks-4104085`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4104085/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4104085/relationships`
- MCP resource: `mine://4104085/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`