# Holden #25 Slurry Impoundment

- **MSHA mine ID:** 4602435
- **Status:** NonProducing
- **Type / commodity:** Facility / Coal (Bituminous)
- **Location:** Mingo, WV
- **Operator:** Coal-Mac LLC
- **Controller:** John Mitch Potter
- **Public source rows linked:** 433
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**John Mitch Potter (0144441) → Coal-Mac LLC (P20596) → Holden #25 Slurry Impoundment (4602435)**

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

## Controller and operator valid-time history

- **Nippon Kokan K K et al → National Coal Mining Company:** 1950-01-01 through 1979-04-30; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **Occidental Petroleum Corp → Island Creek Coal Company:** 1979-05-01 through 1981-12-31; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **ENI → Agipcoal Usa Inc:** 1982-01-01 through 1991-06-19; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **Michael E  Lyons → Celtic Processing Company Inc:** 1991-06-20 through 1997-06-30; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **Ashland Inc et al → Coal-Mac LLC:** 1997-07-01 through 1997-06-30; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **Arch Resources Inc → Coal-Mac LLC:** 1997-07-01 through 2019-10-22; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.
- **John Mitch Potter → Coal-Mac LLC:** 2019-10-23 through current/open; derived from co-tenure at mine 4602435; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 19
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 3 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 4 violation rows across the full record; 1 carry an S&S flag and $3,621 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 1 coal dust; 1 noise. 0 personal-sample rows have a published C/E ratio above 1; 0 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 — 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 — 2 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 — 24 since 2021:** Inspections 110 inspection events and 981 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 77.705 — Guy wires; grounding.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-H/section-77.705
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1605 — Loading and haulage equipment; installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **30 CFR 77.216-4 — Water, sediment or slurry impoundments and impounding structures; reporting requirements; certification.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.216-4

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2005-04-19 through 2005-04-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-10-12 through 2011-10-12; source ID `msha-addresses`
- **Assessed Violations:** 4 rows; 2003-07-21 through 2013-04-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2013-05-24 through 2013-05-24; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 1 rows; 2012-07-24 through 2012-07-24; source ID `msha-coal-dust-samples`
- **Contested Violations:** 2 rows; 2012-06-13 through 2012-06-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 216 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 56 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 1997-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 110 rows; 2000-02-15 through 2026-07-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 2 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 25 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 1 rows; 2012-07-24 through 2012-07-24; source ID `msha-noise-samples`
- **Violations:** 4 rows; 2003-07-21 through 2013-04-15; 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/holden-25-slurry-impoundment-4602435`
- JSON: `/api/v1/mines/holden-25-slurry-impoundment-4602435`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4602435/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4602435/relationships`
- MCP resource: `mine://4602435/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`