# Perkins Plant

- **MSHA mine ID:** 0401680
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Sacramento, CA
- **Operator:** Teichert Aggregates
- **Controller:** Teichert Inc
- **Public source rows linked:** 1,796
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Teichert Inc (M01688) → Teichert Aggregates (L06891) → Perkins Plant (0401680)**

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

## Controller and operator valid-time history

- **Teichert Inc → Teichert Aggregates:** 1950-01-01 through current/open; derived from co-tenure at mine 0401680; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 — 0 since 2021:** Accidents and injuries 74 historical accident/injury rows; 0 coded fatalities and 1,445 lost days across the published record.
2. **COMPLIANCE — 40 since 2021:** Violations and penalties 307 violation rows across the full record; 47 carry an S&S flag and $60,930 appears in current assessed amounts.
3. **HEALTH — 29 samples:** Occupational health samples 29 personal. 1 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 34K employee hours and 72 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 164 linked rows:** Contests, conferences and decisions 64 contested-violation rows, 75 civil-penalty docket/decision rows, and 25 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 — 30 since 2021:** Inspections 98 inspection events and 3K 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 56.13011 — Air receiver tanks.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13011
- **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 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 56.14107 — Moving machine parts.** (4 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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.11027 — Scaffolds and working platforms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11027
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41

## Source coverage

- **Accident, Injuries, and Illnesses:** 74 rows; 2000-03-01 through 2020-08-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1995-03-28 through 1995-03-28; source ID `msha-addresses`
- **Assessed Violations:** 298 rows; 2000-08-21 through 2025-10-06; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 75 rows; 2002-07-03 through 2023-12-22; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 25 rows; 2012-12-28 through 2024-09-17; source ID `msha-conferences`
- **Contested Violations:** 64 rows; 2004-08-24 through 2023-07-12; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 461 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 96 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 98 rows; 2000-08-21 through 2026-07-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 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:** 29 rows; 2000-11-21 through 2025-10-02; source ID `msha-personal-health-samples`
- **Violations:** 307 rows; 2000-08-21 through 2025-10-06; 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/perkins-plant-0401680`
- JSON: `/api/v1/mines/perkins-plant-0401680`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0401680/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0401680/relationships`
- MCP resource: `mine://0401680/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`