# Mouth of Wilson Plant

- **MSHA mine ID:** 4406371
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Grayson, VA
- **Operator:** Appalachian Aggregates, LLC
- **Controller:** CRH PLC
- **Public source rows linked:** 1,612
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**CRH PLC (M06183) → Appalachian Aggregates, LLC (L12054) → Mouth of Wilson Plant (4406371)**

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

## Controller and operator valid-time history

- **James A  Lyalls → Lyalls Stone Company:** 1987-01-01 through 1996-10-22; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.
- **W-L Construction & Paving Inc → Lyalls Stone Company Inc:** 1996-10-23 through 1998-12-31; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.
- **Steve L  Lawson et al → Lyall Stone Inc:** 1999-01-01 through 2006-01-30; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.
- **CRH PLC → Mountain Materials Inc:** 2006-01-31 through 2020-12-31; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.
- **Boxley Materials Co → Appalachian Aggregates, LLC:** 2021-01-01 through 2015-12-31; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.
- **CRH PLC → Appalachian Aggregates, LLC:** 2021-01-01 through current/open; derived from co-tenure at mine 4406371; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 2 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 4 lost days across the published record.
2. **COMPLIANCE — 10 since 2021:** Violations and penalties 149 violation rows across the full record; 43 carry an S&S flag and $33,005 appears in current assessed amounts.
3. **HEALTH — 48 samples:** Occupational health samples 48 personal. 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 3K employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 6 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 — 13 since 2021:** Inspections 80 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 56.14101 — Brakes.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.4402 — Safety can use.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **30 CFR 50.20-1 — General instructions for completing MSHA Form 7000-1.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20-1
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.12030 — Correction of dangerous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2004-08-13 through 2023-10-05; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1997-01-28 through 1997-01-28; source ID `msha-addresses`
- **Assessed Violations:** 147 rows; 2000-01-19 through 2024-07-24; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2020-02-25 through 2020-02-25; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2005-08-31 through 2023-01-13; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2019-10-03 through 2019-10-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 652 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 118 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1987-01-01 through 2021-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 80 rows; 2000-01-18 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 315 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 48 rows; 2001-06-06 through 2025-10-27; source ID `msha-personal-health-samples`
- **Violations:** 149 rows; 2000-01-19 through 2026-10-06; 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/mouth-of-wilson-plant-4406371`
- JSON: `/api/v1/mines/mouth-of-wilson-plant-4406371`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4406371/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4406371/relationships`
- MCP resource: `mine://4406371/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`