# Robin Hood No 9

- **MSHA mine ID:** 4602143
- **Status:** Abandoned and Sealed
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Boone, WV
- **Operator:** Pine Ridge Coal Company
- **Controller:** Patriot Coal Corporation
- **Public source rows linked:** 143
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Patriot Coal Corporation (0071611) → Pine Ridge Coal Company (P24179) → Robin Hood No 9 (4602143)**

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

## Controller and operator valid-time history

- **Armco Inc → Armco Inc:** 1950-01-01 through 1984-02-26; derived from co-tenure at mine 4602143; source `msha-controller-operator-history`.
- **Hanson PLC → Pine Ridge Coal Company:** 1984-02-27 through 1998-05-18; derived from co-tenure at mine 4602143; source `msha-controller-operator-history`.
- **Peabody Energy Corporation → Pine Ridge Coal Company:** 1998-05-19 through 2007-10-30; derived from co-tenure at mine 4602143; source `msha-controller-operator-history`.
- **Patriot Coal Corporation → Pine Ridge Coal Company:** 2007-10-31 through current/open; derived from co-tenure at mine 4602143; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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 — 0 since 2021:** Accidents and injuries 16 historical accident/injury rows; 0 coded fatalities and 142 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 15 violation rows across the full record; 3 carry an S&S flag and $1,206 appears in current assessed amounts.
3. **HEALTH — 50 samples:** Occupational health samples 41 coal dust; 5 coal quartz; 4 noise. 0 personal-sample rows have a published C/E ratio above 1; 1 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 — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 0 since 2021:** Inspections 12 inspection events and 501 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 75.364 — Weekly examination.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.364
- **30 CFR 77.502 — Electric equipment; examination, testing, and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502
- **30 CFR 75.900-3 — Testing, examination, and maintenance of circuit breakers; procedures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-J/section-75.900-3
- **30 CFR 75.512 — Electric equipment; examination, testing and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512
- **30 CFR 77.800-1 — Testing, examination, and maintenance of circuit breakers; procedures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-I/section-77.800-1
- **30 CFR 75.400 — Accumulation of combustible materials.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.400
- **30 CFR 75.352 — Actions in response to AMS malfunction, alert, or alarm signals.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.352
- **30 CFR 75.202 — Protection from falls of roof, face and ribs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202

## Source coverage

- **Accident, Injuries, and Illnesses:** 16 rows; 2000-01-03 through 2000-08-31; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2000-12-06 through 2000-12-06; source ID `msha-addresses`
- **Assessed Violations:** 15 rows; 2000-02-24 through 2000-11-15; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 41 rows; 2000-01-17 through 2000-08-08; source ID `msha-coal-dust-samples`
- **Contractor Employment and Production — Quarterly:** 13 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 3 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1998-05-19; source ID `msha-controller-operator-history`
- **Inspections:** 12 rows; 2000-01-06 through 2000-09-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 10 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 3 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 4 rows; 2000-03-09 through 2000-03-09; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 5 rows; 2000-02-10 through 2000-08-08; source ID `msha-quartz-samples`
- **Violations:** 15 rows; 2000-02-24 through 2000-11-15; 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/robin-hood-no-9-4602143`
- JSON: `/api/v1/mines/robin-hood-no-9-4602143`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4602143/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4602143/relationships`
- MCP resource: `mine://4602143/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`