# Austin Quarry

- **MSHA mine ID:** 0405954
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Madera, CA
- **Operator:** CalMat Co.
- **Controller:** Vulcan Materials Company
- **Public source rows linked:** 786
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vulcan Materials Company (0071891) → CalMat Co. (L16645) → Austin Quarry (0405954)**

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

## Controller and operator valid-time history

- **Vulcan Materials Company → CalMat Co.:** 2021-04-30 through current/open; derived from co-tenure at mine 0405954; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co.:** 2021-04-30 through 2007-11-15; derived from co-tenure at mine 0405954; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 7 since 2021:** Accidents and injuries 7 historical accident/injury rows; 0 coded fatalities and 129 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 $3,145 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 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 16K employee hours and 30 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 13 inspection events and 238 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 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.3130 — Wall, bank, and slope stability.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3130
- **30 CFR 56.14105 — Procedures during repairs or maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14105
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2021-08-05 through 2023-09-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-04-25 through 2021-04-25; source ID `msha-addresses`
- **Assessed Violations:** 8 rows; 2022-08-22 through 2026-05-27; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2023-07-07 through 2023-07-07; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 545 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 114 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2021-04-30 through 2021-04-30; source ID `msha-controller-operator-history`
- **Inspections:** 13 rows; 2021-08-29 through 2026-05-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 62 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 18 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:** 6 rows; 2023-05-24 through 2026-03-18; source ID `msha-personal-health-samples`
- **Violations:** 8 rows; 2022-08-22 through 2026-05-27; 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/austin-quarry-0405954`
- JSON: `/api/v1/mines/austin-quarry-0405954`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405954/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405954/relationships`
- MCP resource: `mine://0405954/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`