# LIMESTONE DUST CORP.

- **MSHA mine ID:** 4402783
- **Status:** Active
- **Type / commodity:** Facility / Crushed, Broken Limestone NEC
- **Location:** Tazewell, VA
- **Operator:** Limestone Dust Corp
- **Controller:** Michael W  McGlothlin
- **Public source rows linked:** 1,818
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Michael W  McGlothlin (M03626) → Limestone Dust Corp (L05015) → LIMESTONE DUST CORP. (4402783)**

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

## Controller and operator valid-time history

- **Mrs William H  Bowen → Limestone Dust Corp:** 1950-01-01 through 1980-09-30; derived from co-tenure at mine 4402783; source `msha-controller-operator-history`.
- **Michael W  McGlothlin → Limestone Dust Corp:** 1980-10-01 through current/open; derived from co-tenure at mine 4402783; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 — 2 since 2021:** Accidents and injuries 70 historical accident/injury rows; 0 coded fatalities and 1,503 lost days across the published record.
2. **COMPLIANCE — 24 since 2021:** Violations and penalties 375 violation rows across the full record; 91 carry an S&S flag and $152,314 appears in current assessed amounts.
3. **HEALTH — 83 samples:** Occupational health samples 83 personal. 9 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 9K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 300 linked rows:** Contests, conferences and decisions 145 contested-violation rows, 145 civil-penalty docket/decision rows, and 10 conference records linked by issuance number.
6. **CONTRACTORS — 7 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 — 15 since 2021:** Inspections 109 inspection events and 2K 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 56.12016 — Work on electrically-powered equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12016
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.18002 — Examination of working places.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **30 CFR 56.5005 — Control of exposure to airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5005

## Source coverage

- **Accident, Injuries, and Illnesses:** 70 rows; 2000-11-08 through 2024-09-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1978-09-25 through 1978-09-25; source ID `msha-addresses`
- **Assessed Violations:** 370 rows; 2000-08-22 through 2026-07-21; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 145 rows; 2011-05-10 through 2025-06-13; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 10 rows; 2009-10-19 through 2010-10-28; source ID `msha-conferences`
- **Contested Violations:** 145 rows; 2009-07-29 through 2026-07-21; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 193 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 51 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 1980-10-01; source ID `msha-controller-operator-history`
- **Inspections:** 109 rows; 2000-08-22 through 2026-07-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 210 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 53 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 83 rows; 2001-02-09 through 2026-03-12; source ID `msha-personal-health-samples`
- **Violations:** 375 rows; 2000-08-22 through 2026-07-21; 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/limestone-dust-corp-4402783`
- JSON: `/api/v1/mines/limestone-dust-corp-4402783`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4402783/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4402783/relationships`
- MCP resource: `mine://4402783/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`