# TRP Table Mountain Plant

- **MSHA mine ID:** 0404847
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Butte, CA
- **Operator:** Triangle Rock Products
- **Controller:** Vulcan Materials Company
- **Public source rows linked:** 966
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vulcan Materials Company (0071891) → Triangle Rock Products (L13967) → TRP Table Mountain Plant (0404847)**

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

## Controller and operator valid-time history

- **Charlotte  Green → Green Rock Quarries:** 1986-09-01 through 1996-03-19; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Meridian Aggregates Company LP → Meridian Aggregates Company:** 1996-03-20 through 2001-04-02; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Meridian Aggregates Company Lp:** 2001-04-03 through 2005-12-04; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials:** 2005-12-05 through 2008-04-10; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Vulcan Materials Company → Triangle Rock Products:** 2008-04-11 through current/open; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → Triangle Rock Products:** 2008-04-11 through 2007-11-15; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.
- **Calmat Company → Triangle Rock Products:** 2008-04-11 through 1999-01-05; derived from co-tenure at mine 0404847; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 19
- Interval anomalies: 2
- 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 9 historical accident/injury rows; 0 coded fatalities and 186 lost days across the published record.
2. **COMPLIANCE — 2 since 2021:** Violations and penalties 65 violation rows across the full record; 15 carry an S&S flag and $8,641 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 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 8K employee hours and 15 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 14 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 6 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 14 since 2021:** Inspections 67 inspection events and 927 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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.16009 — Suspended loads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16009
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 56.4601 — Oxygen cylinder storage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4601

## Source coverage

- **Accident, Injuries, and Illnesses:** 9 rows; 2000-05-18 through 2019-10-08; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1986-11-14 through 1986-11-14; source ID `msha-addresses`
- **Assessed Violations:** 65 rows; 2000-08-15 through 2025-10-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2013-04-10 through 2013-04-10; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2006-05-19 through 2011-05-24; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2012-10-02 through 2012-10-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 320 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 76 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1986-09-01 through 2008-04-11; source ID `msha-controller-operator-history`
- **Inspections:** 67 rows; 2000-08-15 through 2026-04-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 260 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 62 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:** 19 rows; 2002-11-13 through 2025-09-03; source ID `msha-personal-health-samples`
- **Violations:** 65 rows; 2000-08-15 through 2025-10-15; 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-table-mountain-plant-0404847`
- JSON: `/api/v1/mines/trp-table-mountain-plant-0404847`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404847/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404847/relationships`
- MCP resource: `mine://0404847/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`