# A23

- **MSHA mine ID:** 1519658
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Magoffin, KY
- **Operator:** Hendrickson Equipment, Inc.
- **Controller:** Leonard  Hendrickson
- **Public source rows linked:** 79
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Leonard  Hendrickson (C15954) → Hendrickson Equipment, Inc. (P24456) → A23 (1519658)**

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

## Controller and operator valid-time history

- **Leonard  Hendrickson et al → Hendrickson Drilling LLC:** 2012-04-03 through 2010-04-22; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.
- **Robert  Hendrickson et al → Hendrickson Drilling LLC:** 2012-04-03 through 2010-04-22; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.
- **Leonard  Hendrickson → Hendrickson Drilling LLC:** 2012-04-03 through 2019-10-21; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.
- **Leonard  Hendrickson → Hendrickson Equipment Inc:** 2019-10-22 through 2020-07-16; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.
- **William K  Abraham → Virgie Clean Mining LLC:** 2020-07-17 through 2024-03-10; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.
- **Leonard  Hendrickson → Hendrickson Equipment, Inc.:** 2024-03-11 through current/open; derived from co-tenure at mine 1519658; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 14
- Interval anomalies: 2
- 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 — 0 since 2021:** Violations and penalties 4 violation rows across the full record; 1 carry an S&S flag and $427 appears in current assessed amounts.
3. **HEALTH — 18 samples:** Occupational health samples 9 coal dust; 9 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 — 0 tons:** Quarterly production and employment 0 employee hours and 0 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 — 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 — 5 since 2021:** Inspections 20 inspection events and 272 published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 2,729 short tons
- **Labor hours:** 1,475
- **Average employees:** 2
- **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 77.1104 — Accumulations of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.1110 — Examination and maintenance of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110
- **30 CFR 77.400 — Mechanical equipment guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.400
- **30 CFR 77.1713 — Daily inspection of surface coal mine; certified person; reports of inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1713

## Source coverage

- **Addresses of Record:** 1 rows; 2025-07-02 through 2025-07-02; source ID `msha-addresses`
- **Assessed Violations:** 4 rows; 2013-06-12 through 2013-06-17; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 9 rows; 2012-06-20 through 2024-05-02; source ID `msha-coal-dust-samples`
- **Controller and Operator History:** 6 rows; 2012-04-03 through 2024-03-11; source ID `msha-controller-operator-history`
- **Inspections:** 20 rows; 2012-04-24 through 2025-05-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 21 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 4 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 9 rows; 2012-06-20 through 2024-05-02; source ID `msha-noise-samples`
- **Violations:** 4 rows; 2013-06-12 through 2013-06-17; 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/a23-1519658`
- JSON: `/api/v1/mines/a23-1519658`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1519658/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1519658/relationships`
- MCP resource: `mine://1519658/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`