# Cantera Carolina  Pta #3

- **MSHA mine ID:** 5400374
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Fajardo, PR
- **Operator:** Master Aggregates Toa Baja Corp
- **Controller:** Ricardo  Cardona; Victor S  Maldonado
- **Public source rows linked:** 486
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Ricardo  Cardona; Victor S  Maldonado (M02386) → Master Aggregates Toa Baja Corp (L03225) → Cantera Carolina  Pta #3 (5400374)**

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

## Controller and operator valid-time history

- **Ricardo  Cardona et al → Empresas Master:** 1995-10-01 through 2006-09-28; derived from co-tenure at mine 5400374; source `msha-controller-operator-history`.
- **Victor S  Maldonado  et al → Empresas Master:** 1995-10-01 through 2006-09-28; derived from co-tenure at mine 5400374; source `msha-controller-operator-history`.
- **Victor S  Maldonado  et al → Master Aggregates Toa Baja Corp:** 2006-09-29 through current/open; derived from co-tenure at mine 5400374; source `msha-controller-operator-history`.
- **Ricardo  Cardona et al → Master Aggregates Toa Baja Corp:** 2006-09-29 through current/open; derived from co-tenure at mine 5400374; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 8
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 20 historical accident/injury rows; 1 coded fatalities and 617 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 103 violation rows across the full record; 47 carry an S&S flag and $39,263 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 40 linked rows:** Contests, conferences and decisions 20 contested-violation rows, 20 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 0 since 2021:** Inspections 61 inspection events and 934 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 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 46.8 — Annual refresher training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.8
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.12004 — Electrical conductors.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **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 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 20 rows; 2000-02-23 through 2010-11-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-08-25 through 2011-08-25; source ID `msha-addresses`
- **Assessed Violations:** 100 rows; 2000-01-18 through 2011-02-24; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 20 rows; 2009-11-03 through 2015-02-10; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 20 rows; 2006-04-11 through 2010-09-02; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 78 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 18 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1995-10-01 through 2006-09-29; source ID `msha-controller-operator-history`
- **Inspections:** 61 rows; 2000-01-18 through 2011-03-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 23 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 31 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; 2001-07-11 through 2010-09-08; source ID `msha-personal-health-samples`
- **Violations:** 103 rows; 2000-01-18 through 2011-02-24; 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/cantera-carolina-pta-3-5400374`
- JSON: `/api/v1/mines/cantera-carolina-pta-3-5400374`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5400374/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5400374/relationships`
- MCP resource: `mine://5400374/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`