# Workman Branch Deep Mine

- **MSHA mine ID:** 4609343
- **Status:** Abandoned
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Boone, WV
- **Operator:** Rockwell Mining LLC
- **Controller:** Sev.en Global Investments a.s.
- **Public source rows linked:** 863
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Sev.en Global Investments a.s. (0158381) → Rockwell Mining LLC (0141655) → Workman Branch Deep Mine (4609343)**

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

## Controller and operator valid-time history

- **Peabody Energy Corporation → Hillside Mining Company:** 2009-06-01 through 2011-08-01; derived from co-tenure at mine 4609343; source `msha-controller-operator-history`.
- **Michael  Day → Lago Mining, LLC:** 2011-08-02 through 2013-01-16; derived from co-tenure at mine 4609343; source `msha-controller-operator-history`.
- **Peabody Energy Corporation → Hillside Mining Company:** 2013-01-17 through 2018-06-03; derived from co-tenure at mine 4609343; source `msha-controller-operator-history`.
- **Blackhawk Mining LLC → Rockwell Mining LLC:** 2018-06-04 through 2020-05-31; derived from co-tenure at mine 4609343; source `msha-controller-operator-history`.
- **Sev.en Global Investments a.s. → Rockwell Mining LLC:** 2020-06-01 through current/open; derived from co-tenure at mine 4609343; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 25 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 50 violation rows across the full record; 20 carry an S&S flag and $14,316 appears in current assessed amounts.
3. **HEALTH — 212 samples:** Occupational health samples 181 coal dust; 3 coal quartz; 28 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 — 48K tons:** Quarterly production and employment 40K employee hours and 85 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 6 since 2021:** Inspections 29 inspection events and 1K 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 75.1711 — Sealing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1711
- **30 CFR 75.1403 — Other safeguards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-O/section-75.1403
- **30 CFR 75.202 — Protection from falls of roof, face and ribs.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202
- **30 CFR 75.400 — Accumulation of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.400
- **30 CFR 77.1103 — Flammable liquids; storage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1103
- **30 CFR 75.904 — Identification of circuit breakers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-J/section-75.904
- **30 CFR 75.1103-4 — Automatic fire sensor and warning device systems; installation; minimum requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1103-4
- **30 CFR 75.1714-6 — Emergency tethers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1714-6
- **30 CFR 75.701 — Grounding metallic frames, casings, and other enclosures of electric equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-H/section-75.701
- **30 CFR 75.1100-2 — Quantity and location of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-2

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2011-07-25 through 2012-09-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-06-11 through 2026-06-11; source ID `msha-addresses`
- **Assessed Violations:** 47 rows; 2010-12-21 through 2014-05-21; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2012-10-09 through 2013-06-28; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 181 rows; 2011-06-21 through 2012-08-15; source ID `msha-coal-dust-samples`
- **Contested Violations:** 2 rows; 2011-11-29 through 2012-01-19; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 377 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 70 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2009-06-01 through 2018-06-04; source ID `msha-controller-operator-history`
- **Inspections:** 29 rows; 2010-12-13 through 2023-06-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 52 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 5 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 28 rows; 2011-07-13 through 2012-06-12; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 3 rows; 2012-06-05 through 2012-07-17; source ID `msha-quartz-samples`
- **Violations:** 50 rows; 2010-12-21 through 2014-05-21; 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/workman-branch-deep-mine-4609343`
- JSON: `/api/v1/mines/workman-branch-deep-mine-4609343`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4609343/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4609343/relationships`
- MCP resource: `mine://4609343/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`