# TRP-Sacramento Plant

- **MSHA mine ID:** 0404772
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Sacramento, CA
- **Operator:** Triangle Rock Products
- **Controller:** Vulcan Materials Company
- **Public source rows linked:** 669
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vulcan Materials Company (0071891) → Triangle Rock Products (L13967) → TRP-Sacramento Plant (0404772)**

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

## Controller and operator valid-time history

- **Neal F  Erickson → Sacramento Aggregates Inc:** 1985-10-01 through 1998-03-08; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Calmat Company → Triangle Rock Products Inc:** 1998-03-09 through 1999-01-05; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → Triangle Rock Products Inc:** 1999-01-06 through 1999-01-05; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → CalMat Co.:** 1999-01-06 through 2007-01-31; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → Triangle Rock Products:** 2007-02-01 through 2007-11-15; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Calmat Company → Triangle Rock Products:** 2007-02-01 through 1999-01-05; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Vulcan Materials Company → Triangle Rock Products Inc:** 2007-11-16 through 1999-01-05; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Vulcan Materials Company → CalMat Co.:** 2007-11-16 through 2007-01-31; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.
- **Vulcan Materials Company → Triangle Rock Products:** 2007-11-16 through current/open; derived from co-tenure at mine 0404772; source `msha-controller-operator-history`.

- History rows: 9
- Typed edges: 17
- Interval anomalies: 4
- 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 — 3 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 359 lost days across the published record.
2. **COMPLIANCE — 12 since 2021:** Violations and penalties 108 violation rows across the full record; 25 carry an S&S flag and $16,960 appears in current assessed amounts.
3. **HEALTH — 24 samples:** Occupational health samples 24 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 18K employee hours and 33 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 11 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 7 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 17 since 2021:** Inspections 71 inspection events and 1K 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 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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 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 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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2000-04-19 through 2023-04-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1999-03-14 through 1999-03-14; source ID `msha-addresses`
- **Assessed Violations:** 107 rows; 2000-06-22 through 2025-10-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2013-05-02 through 2013-05-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 7 rows; 2004-05-14 through 2020-03-30; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2011-02-16 through 2011-02-16; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 54 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 9 rows; 1985-10-01 through 2007-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 71 rows; 2000-06-22 through 2026-06-25; 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:** 24 rows; 2002-03-20 through 2025-10-02; source ID `msha-personal-health-samples`
- **Violations:** 108 rows; 2000-06-22 through 2025-10-01; 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/trp-sacramento-plant-0404772`
- JSON: `/api/v1/mines/trp-sacramento-plant-0404772`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404772/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404772/relationships`
- MCP resource: `mine://0404772/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`