# Western Aggregates LLC

- **MSHA mine ID:** 0404950
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Yuba, CA
- **Operator:** Western Aggregates LLC
- **Controller:** Teichert Inc
- **Public source rows linked:** 3,135
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Teichert Inc (M01688) → Western Aggregates LLC (L03322) → Western Aggregates LLC (0404950)**

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

## Controller and operator valid-time history

- **Eagle Materials Inc → Western Aggregates LLC:** 1988-03-01 through 2020-04-16; derived from co-tenure at mine 0404950; source `msha-controller-operator-history`.
- **Teichert Inc → Western Aggregates LLC:** 2020-04-17 through current/open; derived from co-tenure at mine 0404950; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 34 historical accident/injury rows; 0 coded fatalities and 913 lost days across the published record.
2. **COMPLIANCE — 44 since 2021:** Violations and penalties 453 violation rows across the full record; 129 carry an S&S flag and $193,768 appears in current assessed amounts.
3. **HEALTH — 34 samples:** Occupational health samples 34 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 19K employee hours and 38 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 182 linked rows:** Contests, conferences and decisions 62 contested-violation rows, 62 civil-penalty docket/decision rows, and 58 conference records linked by issuance number.
6. **CONTRACTORS — 13 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 — 20 since 2021:** Inspections 113 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 47.41 — Requirement for container labels.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **30 CFR 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **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 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 34 rows; 2000-11-27 through 2024-06-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1988-06-15 through 1988-06-15; source ID `msha-addresses`
- **Assessed Violations:** 450 rows; 2000-04-06 through 2026-06-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 62 rows; 2006-01-17 through 2018-04-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 58 rows; 2000-04-21 through 2025-11-19; source ID `msha-conferences`
- **Contested Violations:** 62 rows; 2004-05-26 through 2017-11-29; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,295 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 305 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1988-03-01 through 1988-03-01; source ID `msha-controller-operator-history`
- **Inspections:** 113 rows; 2000-03-14 through 2026-06-02; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 211 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 34 rows; 2002-06-11 through 2026-06-04; source ID `msha-personal-health-samples`
- **Violations:** 453 rows; 2000-04-06 through 2026-06-03; 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/western-aggregates-llc-0404950`
- JSON: `/api/v1/mines/western-aggregates-llc-0404950`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404950/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404950/relationships`
- MCP resource: `mine://0404950/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`