# Twilight Mtr Surface Mine

- **MSHA mine ID:** 4608645
- **Status:** NonProducing
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Boone, WV
- **Operator:** Lexington Coal Company, LLC
- **Controller:** Lexington Coal Holdings, Inc
- **Public source rows linked:** 10,977
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Lexington Coal Holdings, Inc (0137221) → Lexington Coal Company, LLC (0154153) → Twilight Mtr Surface Mine (4608645)**

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

## Controller and operator valid-time history

- **Massey Energy Company → Progress Coal:** 1997-06-01 through 2011-05-31; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.
- **Alpha Natural Resources, Inc. → Progress Coal:** 2011-06-01 through 2014-02-23; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.
- **Alpha Natural Resources, Inc. → Independence Coal Co. LLC:** 2014-02-24 through 2016-07-25; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.
- **Massey Energy Company → Independence Coal Co. LLC:** 2014-02-24 through 2011-05-31; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.
- **Alpha Natural Resources Holdings, Inc → Independence Coal Co. LLC:** 2016-07-26 through 2017-10-22; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.
- **Lexington Coal Holdings, Inc → Lexington Coal Company, LLC:** 2017-10-23 through current/open; derived from co-tenure at mine 4608645; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 15
- 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 — 15 since 2021:** Accidents and injuries 219 historical accident/injury rows; 4 coded fatalities and 8,268 lost days across the published record.
2. **COMPLIANCE — 365 since 2021:** Violations and penalties 1,241 violation rows across the full record; 542 carry an S&S flag and $1,363,215 appears in current assessed amounts.
3. **HEALTH — 719 samples:** Occupational health samples 547 coal dust; 50 coal quartz; 122 noise. 0 personal-sample rows have a published C/E ratio above 1; 14 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 4K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 700 linked rows:** Contests, conferences and decisions 314 contested-violation rows, 311 civil-penalty docket/decision rows, and 75 conference records linked by issuance number.
6. **CONTRACTORS — 40 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 — 101 since 2021:** Inspections 249 inspection events and 14K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 91,957 short tons
- **Labor hours:** 47,598
- **Average employees:** 20
- **Coal supply region:** Appalachia Central
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.1005 — Scaling highwalls; general.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-K/section-77.1005
- **30 CFR 71.206 — Quarterly sampling; designated work positions.** (9 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-C/section-71.206
- **30 CFR 77.1713 — Daily inspection of surface coal mine; certified person; reports of inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1713

## Source coverage

- **Accident, Injuries, and Illnesses:** 219 rows; 2000-02-13 through 2025-09-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-12-16 through 2025-12-16; source ID `msha-addresses`
- **Assessed Violations:** 1,185 rows; 2000-01-30 through 2026-07-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 311 rows; 2005-08-12 through 2026-04-20; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 547 rows; 2000-01-27 through 2026-09-10; source ID `msha-coal-dust-samples`
- **Conferences:** 75 rows; 2000-05-17 through 2023-06-23; source ID `msha-conferences`
- **Contested Violations:** 314 rows; 2003-07-23 through 2026-07-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 5,264 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,140 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1997-06-01 through 2017-10-23; source ID `msha-controller-operator-history`
- **Inspections:** 249 rows; 2000-01-28 through 2026-10-02; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 207 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 45 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 122 rows; 2001-05-23 through 2025-10-20; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 50 rows; 2000-05-01 through 2025-10-20; source ID `msha-quartz-samples`
- **Violations:** 1,241 rows; 2000-01-30 through 2026-09-24; 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/twilight-mtr-surface-mine-4608645`
- JSON: `/api/v1/mines/twilight-mtr-surface-mine-4608645`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4608645/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4608645/relationships`
- MCP resource: `mine://4608645/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`