# Thunder Ridge

- **MSHA mine ID:** 1517746
- **Status:** NonProducing
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Leslie, KY
- **Operator:** Pine Branch Mining LLC
- **Controller:** Sev.en Global Investments a.s.
- **Public source rows linked:** 5,161
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Sev.en Global Investments a.s. (0158381) → Pine Branch Mining LLC (0125574) → Thunder Ridge (1517746)**

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

## Controller and operator valid-time history

- **Greg  Wells → Leslie Resources Inc:** 1996-01-01 through 1998-03-08; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Horizon Natural Resources Incorporated → Leslie Resources Inc:** 1998-03-09 through 2004-10-01; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **International Coal Group Inc (ICG) → ICG Hazard, LLC:** 2004-10-02 through 2011-06-14; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Arch Resources Inc → ICG Hazard, LLC:** 2011-06-15 through 2014-04-30; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Blackhawk Mining LLC → Pine Branch Mining LLC:** 2014-05-01 through 2016-04-11; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Thomas A  Potter et al → Pine Branch Mining LLC:** 2014-05-01 through 2013-06-30; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **John M  Potter et al → Pine Branch Mining LLC:** 2014-05-01 through 2013-06-30; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **International Coal Group Inc (ICG) → KNOTT COUNTY COAL LLC:** 2016-04-12 through 2011-06-14; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Quest Energy Corporation → KNOTT COUNTY COAL LLC:** 2016-04-12 through 2016-04-20; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Arch Resources Inc → KNOTT COUNTY COAL LLC:** 2016-04-12 through 2016-04-11; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Blackhawk Mining LLC → Pine Branch Mining LLC:** 2016-04-21 through 2020-05-31; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Thomas A  Potter et al → Pine Branch Mining LLC:** 2016-04-21 through 2013-06-30; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **John M  Potter et al → Pine Branch Mining LLC:** 2016-04-21 through 2013-06-30; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **American Resources Corporation → KNOTT COUNTY COAL LLC:** 2017-01-05 through 2016-04-20; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Sev.en Global Investments a.s. → Pine Branch Mining LLC:** 2020-06-01 through 2016-04-11; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.
- **Sev.en Global Investments a.s. → Pine Branch Mining LLC:** 2020-06-01 through current/open; derived from co-tenure at mine 1517746; source `msha-controller-operator-history`.

- History rows: 16
- Typed edges: 33
- Interval anomalies: 8
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 1 since 2021:** Accidents and injuries 40 historical accident/injury rows; 1 coded fatalities and 2,279 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 510 violation rows across the full record; 175 carry an S&S flag and $193,991 appears in current assessed amounts.
3. **HEALTH — 782 samples:** Occupational health samples 585 coal dust; 56 coal quartz; 141 noise. 0 personal-sample rows have a published C/E ratio above 1; 22 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 117 linked rows:** Contests, conferences and decisions 30 contested-violation rows, 48 civil-penalty docket/decision rows, and 39 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 — 28 since 2021:** Inspections 151 inspection events and 5K 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 77.216 — Water, sediment, or slurry impoundments and impounding structures; general.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.216
- **30 CFR 71.201 — Sampling; general and technical requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-C/section-71.201
- **30 CFR 72.100 — Periodic examinations.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-72/subpart-B/section-72.100
- **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 71.403 — Waiver of surface facilities requirements; posting of waiver.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-E/section-71.403
- **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 77.208 — 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 77.1606 — 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 77.1104 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 40 rows; 2000-03-30 through 2021-09-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2020-09-28 through 2020-09-28; source ID `msha-addresses`
- **Assessed Violations:** 498 rows; 2000-02-16 through 2025-03-19; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 48 rows; 2000-10-11 through 2015-02-18; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 585 rows; 2000-01-26 through 2022-03-10; source ID `msha-coal-dust-samples`
- **Conferences:** 39 rows; 2002-10-24 through 2010-08-27; source ID `msha-conferences`
- **Contested Violations:** 30 rows; 2006-01-23 through 2014-08-20; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,368 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 512 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 16 rows; 1996-01-01 through 2016-04-21; source ID `msha-controller-operator-history`
- **Inspections:** 151 rows; 2000-02-16 through 2026-09-16; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 142 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 23 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 141 rows; 2002-03-13 through 2022-02-23; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 56 rows; 2000-02-16 through 2022-02-23; source ID `msha-quartz-samples`
- **Violations:** 510 rows; 2000-02-16 through 2025-03-19; 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/thunder-ridge-1517746`
- JSON: `/api/v1/mines/thunder-ridge-1517746`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1517746/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1517746/relationships`
- MCP resource: `mine://1517746/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`