# Prep Plant

- **MSHA mine ID:** 1504331
- **Status:** NonProducing
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Harlan, KY
- **Operator:** Montana Bakken, LLC
- **Controller:** Douglas  Warriner
- **Public source rows linked:** 3,476
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Douglas  Warriner (0125341) → Montana Bakken, LLC (0146154) → Prep Plant (1504331)**

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

## Controller and operator valid-time history

- **Champion International Corporation → Pathfork-Harlan Coal Company Inc:** 1950-01-01 through 1981-11-02; derived from co-tenure at mine 1504331; source `msha-controller-operator-history`.
- **Benjamin R.  Bennett → Manalapan Mining Company Inc:** 1981-11-03 through 2016-07-13; derived from co-tenure at mine 1504331; source `msha-controller-operator-history`.
- **Douglas  Warriner → Montana Bakken, LLC:** 2016-07-14 through current/open; derived from co-tenure at mine 1504331; source `msha-controller-operator-history`.

- History rows: 3
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 287 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 744 violation rows across the full record; 372 carry an S&S flag and $211,671 appears in current assessed amounts.
3. **HEALTH — 383 samples:** Occupational health samples 252 coal dust; 33 coal quartz; 98 noise. 0 personal-sample rows have a published C/E ratio above 1; 38 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 — 622 linked rows:** Contests, conferences and decisions 289 contested-violation rows, 290 civil-penalty docket/decision rows, and 43 conference records linked by issuance number.
6. **CONTRACTORS — 11 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 — 31 since 2021:** Inspections 198 inspection events and 4K 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 77.216-1 — Water, sediment or slurry impoundments and impounding structures; identification.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.216-1
- **30 CFR 77.216 — Water, sediment, or slurry impoundments and impounding structures; general.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.216
- **30 CFR 77.216-3 — Water, sediment, or slurry impoundments and impounding structures; inspection requirements; correction of hazards; program requirements.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.216-3
- **30 CFR 77.1108-1 — Type and capacity of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1108-1

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2000-01-26 through 2019-03-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2019-04-01 through 2019-04-01; source ID `msha-addresses`
- **Assessed Violations:** 714 rows; 2000-04-03 through 2025-05-16; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 290 rows; 2008-01-31 through 2015-07-06; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 252 rows; 2000-03-22 through 2017-03-23; source ID `msha-coal-dust-samples`
- **Conferences:** 43 rows; 2001-05-29 through 2011-10-28; source ID `msha-conferences`
- **Contested Violations:** 289 rows; 2005-08-03 through 2014-03-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 478 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 104 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2016-07-14; source ID `msha-controller-operator-history`
- **Inspections:** 198 rows; 2000-01-04 through 2026-08-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 182 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 36 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 98 rows; 2000-05-26 through 2017-06-27; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 33 rows; 2000-03-22 through 2011-06-27; source ID `msha-quartz-samples`
- **Violations:** 744 rows; 2000-04-03 through 2025-05-16; 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/prep-plant-1504331`
- JSON: `/api/v1/mines/prep-plant-1504331`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1504331/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1504331/relationships`
- MCP resource: `mine://1504331/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`