# CHM 23, Unit 4, & Unit 21

- **MSHA mine ID:** 4003571
- **Status:** Active
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Fayette, WV
- **Operator:** Contract Highwall Mining, LLC
- **Controller:** F D  Justice II; Greg  Henzman
- **Public source rows linked:** 94
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**F D  Justice II; Greg  Henzman (0042775) → Contract Highwall Mining, LLC (0051979) → CHM 23, Unit 4, & Unit 21 (4003571)**

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

## Controller and operator valid-time history

- **Greg  Henzman  et al → Contract Highwall Mining, LLC:** 2022-01-21 through current/open; derived from co-tenure at mine 4003571; source `msha-controller-operator-history`.
- **F D  Justice II  et al → Contract Highwall Mining, LLC:** 2022-01-21 through current/open; derived from co-tenure at mine 4003571; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 8 since 2021:** Violations and penalties 8 violation rows across the full record; 1 carry an S&S flag and $1,167 appears in current assessed amounts.
3. **HEALTH — 34 samples:** Occupational health samples 17 coal dust; 17 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 — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 16 since 2021:** Inspections 16 inspection events and 195 published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 84,278 short tons
- **Labor hours:** 10,711
- **Average employees:** 5
- **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 77.205 — Travelways at surface installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.205
- **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 77.502 — 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 72.100 — Periodic examinations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-72/subpart-B/section-72.100
- **30 CFR 77.106 — Records of certified and qualified persons.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-B/section-77.106
- **30 CFR 77.1708 — Safety program; instruction of persons employed at the mine.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1708
- **30 CFR 77.1702 — Arrangements for emergency medical assistance and transportation for injured persons; reporting requirements; posting requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1702

## Source coverage

- **Addresses of Record:** 1 rows; 2026-06-17 through 2026-06-17; source ID `msha-addresses`
- **Assessed Violations:** 7 rows; 2022-04-26 through 2025-01-30; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2022-11-14 through 2022-11-14; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 17 rows; 2022-07-19 through 2026-09-17; source ID `msha-coal-dust-samples`
- **Contested Violations:** 1 rows; 2022-07-14 through 2022-07-14; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 2022-01-21 through 2022-01-21; source ID `msha-controller-operator-history`
- **Inspections:** 16 rows; 2022-03-22 through 2026-09-14; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 18 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:** 17 rows; 2022-07-19 through 2026-09-17; source ID `msha-noise-samples`
- **Violations:** 8 rows; 2022-04-26 through 2025-01-30; 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/chm-23-unit-4-unit-21-4003571`
- JSON: `/api/v1/mines/chm-23-unit-4-unit-21-4003571`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4003571/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4003571/relationships`
- MCP resource: `mine://4003571/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`