# Muddy Bridge

- **MSHA mine ID:** 4609514
- **Status:** NonProducing
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Logan, WV
- **Operator:** Coal Mac East
- **Controller:** John Mitch Potter
- **Public source rows linked:** 12,705
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**John Mitch Potter (0144441) → Coal Mac East (0210693) → Muddy Bridge (4609514)**

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

## Controller and operator valid-time history

- **Blackhawk Mining LLC → Hampden Coal, LLC:** 2016-06-24 through 2020-03-24; derived from co-tenure at mine 4609514; source `msha-controller-operator-history`.
- **Coronado Coal LLC → Greenbrier Minerals, LLC:** 2020-03-25 through 2026-07-31; derived from co-tenure at mine 4609514; source `msha-controller-operator-history`.
- **Sev.en Global Investments a.s. → Hampden Coal, LLC:** 2020-06-01 through 2020-03-24; derived from co-tenure at mine 4609514; source `msha-controller-operator-history`.
- **John Mitch Potter → Coal Mac East:** 2026-08-01 through current/open; derived from co-tenure at mine 4609514; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- Interval anomalies: 1
- 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 — 31 since 2021:** Accidents and injuries 58 historical accident/injury rows; 0 coded fatalities and 3,622 lost days across the published record.
2. **COMPLIANCE — 966 since 2021:** Violations and penalties 1,441 violation rows across the full record; 322 carry an S&S flag and $810,252 appears in current assessed amounts.
3. **HEALTH — 7K samples:** Occupational health samples 6,718 coal dust; 314 coal quartz; 166 noise. 0 personal-sample rows have a published C/E ratio above 1; 11 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 — 8K tons:** Quarterly production and employment 4K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1,266 linked rows:** Contests, conferences and decisions 622 contested-violation rows, 621 civil-penalty docket/decision rows, and 23 conference records linked by issuance number.
6. **CONTRACTORS — 9 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 — 72 since 2021:** Inspections 134 inspection events and 9K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 555,617 short tons
- **Labor hours:** 302,652
- **Average employees:** 117
- **Coal supply region:** Appalachia Central
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 75.364 — Weekly examination.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.364
- **30 CFR 75.1600-2 — Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-Q/section-75.1600-2
- **30 CFR 75.1100-3 — Condition and examination of firefighting equipment.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-3
- **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 75.503 — Permissible electric face equipment; maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.503
- **30 CFR 75.1103-1 — Automatic fire sensors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1103-1
- **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 75.605 — Clamping of trailing cables to equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-G/section-75.605
- **30 CFR 75.1731 — Maintenance of belt conveyors and belt conveyor entries.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1731

## Source coverage

- **Accident, Injuries, and Illnesses:** 58 rows; 2017-02-19 through 2026-08-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-04-20 through 2026-04-20; source ID `msha-addresses`
- **Assessed Violations:** 1,396 rows; 2016-08-02 through 2026-07-28; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 621 rows; 2017-08-11 through 2026-09-28; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 6,718 rows; 2016-11-14 through 2026-04-15; source ID `msha-coal-dust-samples`
- **Conferences:** 23 rows; 2016-08-30 through 2025-07-29; source ID `msha-conferences`
- **Contested Violations:** 622 rows; 2016-11-15 through 2026-04-30; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 931 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 175 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2016-06-24 through 2026-08-01; source ID `msha-controller-operator-history`
- **Inspections:** 134 rows; 2016-07-11 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 78 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:** 166 rows; 2017-02-14 through 2026-02-05; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 314 rows; 2016-12-08 through 2026-04-15; source ID `msha-quartz-samples`
- **Violations:** 1,441 rows; 2016-08-02 through 2026-09-16; 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/muddy-bridge-4609514`
- JSON: `/api/v1/mines/muddy-bridge-4609514`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4609514/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4609514/relationships`
- MCP resource: `mine://4609514/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`