# Leer South Preparation Plant

- **MSHA mine ID:** 4608777
- **Status:** Active
- **Type / commodity:** Facility / Coal (Bituminous)
- **Location:** Barbour, WV
- **Operator:** Wolf Run Mining LLC
- **Controller:** Core Natural Resources Inc
- **Public source rows linked:** 4,084
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Core Natural Resources Inc (0189840) → Wolf Run Mining LLC (P23768) → Leer South Preparation Plant (4608777)**

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

## Controller and operator valid-time history

- **Anker Group Inc → Wolf Run Mining LLC:** 1999-05-01 through 2005-05-31; derived from co-tenure at mine 4608777; source `msha-controller-operator-history`.
- **International Coal Group Inc (ICG) → Wolf Run Mining LLC:** 2005-06-01 through 2011-06-14; derived from co-tenure at mine 4608777; source `msha-controller-operator-history`.
- **Arch Resources Inc → Wolf Run Mining LLC:** 2011-06-15 through 2025-01-13; derived from co-tenure at mine 4608777; source `msha-controller-operator-history`.
- **Core Natural Resources Inc → Wolf Run Mining LLC:** 2025-01-14 through current/open; derived from co-tenure at mine 4608777; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 2 since 2021:** Accidents and injuries 18 historical accident/injury rows; 0 coded fatalities and 960 lost days across the published record.
2. **COMPLIANCE — 52 since 2021:** Violations and penalties 222 violation rows across the full record; 69 carry an S&S flag and $49,423 appears in current assessed amounts.
3. **HEALTH — 691 samples:** Occupational health samples 524 coal dust; 40 coal quartz; 127 noise. 0 personal-sample rows have a published C/E ratio above 1; 17 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 2K employee hours and 4 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 22 linked rows:** Contests, conferences and decisions 11 contested-violation rows, 6 civil-penalty docket/decision rows, and 5 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 — 45 since 2021:** Inspections 172 inspection events and 5K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 0 short tons
- **Labor hours:** 138,077
- **Average employees:** 58
- **Coal supply region:** Appalachia Northern
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.207 — Illumination.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.207
- **30 CFR 77.404 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404
- **30 CFR 77.107-1 — Plans for training programs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-B/section-77.107-1
- **30 CFR 77.100 — Certified person.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-B/section-77.100
- **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
- **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 77.410 — Mobile equipment; automatic warning devices.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410
- **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 71.402 — Minimum requirements for bathing facilities, change rooms, and sanitary flush toilet facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-E/section-71.402
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 18 rows; 2000-11-06 through 2022-05-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2005-03-17 through 2005-03-17; source ID `msha-addresses`
- **Assessed Violations:** 217 rows; 2000-09-18 through 2026-08-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2012-12-21 through 2014-02-21; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 524 rows; 2000-01-17 through 2026-10-08; source ID `msha-coal-dust-samples`
- **Conferences:** 5 rows; 2012-12-19 through 2021-08-11; source ID `msha-conferences`
- **Contested Violations:** 11 rows; 2011-01-18 through 2012-07-11; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,212 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 481 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1999-05-01 through 1999-05-01; source ID `msha-controller-operator-history`
- **Inspections:** 172 rows; 2000-02-04 through 2026-08-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 14 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 29 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 127 rows; 2001-04-02 through 2025-11-18; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 40 rows; 2000-03-08 through 2026-06-14; source ID `msha-quartz-samples`
- **Violations:** 222 rows; 2000-09-18 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/leer-south-preparation-plant-4608777`
- JSON: `/api/v1/mines/leer-south-preparation-plant-4608777`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4608777/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4608777/relationships`
- MCP resource: `mine://4608777/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`