# Shean Hill Mine

- **MSHA mine ID:** 3304591
- **Status:** Abandoned
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Jefferson, OH
- **Operator:** Sterling Mining Corporation
- **Controller:** W Thomas  Mackall
- **Public source rows linked:** 1,226
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**W Thomas  Mackall (C00082) → Sterling Mining Corporation (P21337) → Shean Hill Mine (3304591)**

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

## Controller and operator valid-time history

- **W Thomas  Mackall et al → Sterling Mining Corporation:** 2007-07-27 through current/open; derived from co-tenure at mine 3304591; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 7 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 200 violation rows across the full record; 56 carry an S&S flag and $32,663 appears in current assessed amounts.
3. **HEALTH — 505 samples:** Occupational health samples 449 coal dust; 14 coal quartz; 42 noise. 0 personal-sample rows have a published C/E ratio above 1; 13 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 3K employee hours and 5 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 96 inspection events and 6K 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 75.310 — Installation of main mine fans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.310
- **30 CFR 75.1714-3 — Self-rescue devices; inspection, testing, maintenance, repair, and recordkeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1714-3
- **30 CFR 75.1100-3 — Condition and examination of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-3
- **30 CFR 49.17 — Physical requirements for mine rescue team.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-49/subpart-B/section-49.17
- **30 CFR 75.825 — Power centers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-I/section-75.825
- **30 CFR 75.403 — Maintenance of incombustible content of rock dust.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.403
- **30 CFR 75.1107-4 — Automatic fire sensors and manual actuators; installation; minimum requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1107-4
- **30 CFR 75.508-2 — Changes in electric system map; recording.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.508-2
- **30 CFR 75.517 — Power wires and cables; insulation and protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.517
- **30 CFR 75.1501 — Emergency evacuations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-P/section-75.1501
- **30 CFR 75.380 — Escapeways; bituminous and lignite mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.380
- **30 CFR 75.370 — Mine ventilation plan; submission and approval.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.370

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2011-01-09 through 2014-08-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2017-12-22 through 2017-12-22; source ID `msha-addresses`
- **Assessed Violations:** 201 rows; 2008-03-13 through 2016-08-24; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 449 rows; 2008-11-17 through 2016-10-21; source ID `msha-coal-dust-samples`
- **Contractor Employment and Production — Quarterly:** 79 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 15 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 2007-07-27 through 2007-07-27; source ID `msha-controller-operator-history`
- **Inspections:** 96 rows; 2008-01-24 through 2018-03-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 95 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 22 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 42 rows; 2009-06-24 through 2015-01-27; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 14 rows; 2010-09-22 through 2015-01-20; source ID `msha-quartz-samples`
- **Violations:** 200 rows; 2008-03-13 through 2016-08-24; 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/shean-hill-mine-3304591`
- JSON: `/api/v1/mines/shean-hill-mine-3304591`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3304591/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3304591/relationships`
- MCP resource: `mine://3304591/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`