# Cantera Caguas Pta 5

- **MSHA mine ID:** 5400275
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Guayama, PR
- **Operator:** Master Aggregates Toa Baja Corp
- **Controller:** Ricardo  Cardona; Victor S  Maldonado
- **Public source rows linked:** 369
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Ricardo  Cardona; Victor S  Maldonado (M02386) → Master Aggregates Toa Baja Corp (L03225) → Cantera Caguas Pta 5 (5400275)**

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

## Controller and operator valid-time history

- **Rexco Industries Inc → Marmoles Paonazzo Inc:** 1984-04-01 through 1987-12-30; derived from co-tenure at mine 5400275; source `msha-controller-operator-history`.
- **Hector M  Cintron → Marmoles Paonazzo Inc:** 1987-12-31 through 1998-02-22; derived from co-tenure at mine 5400275; source `msha-controller-operator-history`.
- **Victor S  Maldonado  et al → Empresas Master:** 1998-02-23 through 2006-09-28; derived from co-tenure at mine 5400275; source `msha-controller-operator-history`.
- **Ricardo  Cardona et al → Empresas Master:** 1998-02-23 through 2006-09-28; derived from co-tenure at mine 5400275; 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 5400275; 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 5400275; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 14
- 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 2 historical accident/injury rows; 0 coded fatalities and 45 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 66 violation rows across the full record; 43 carry an S&S flag and $32,253 appears in current assessed amounts.
3. **HEALTH — 21 samples:** Occupational health samples 21 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 9K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 26 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 22 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 41 inspection events and 374 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 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.12034 — Guarding around lights.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12034
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **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 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 56.15005 — 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 56.12016 — Work on electrically-powered equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12016
- **30 CFR 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **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 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2000-01-09 through 2006-12-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2010-02-22 through 2010-02-22; source ID `msha-addresses`
- **Assessed Violations:** 62 rows; 2000-02-02 through 2008-06-04; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2010-10-12 through 2010-10-12; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 22 rows; 2002-11-21 through 2008-01-24; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2007-06-04 through 2007-06-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 61 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 16 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1984-04-01 through 2006-09-29; source ID `msha-controller-operator-history`
- **Inspections:** 41 rows; 2000-02-02 through 2009-02-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 36 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 30 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:** 21 rows; 2001-06-07 through 2005-12-14; source ID `msha-personal-health-samples`
- **Violations:** 66 rows; 2000-02-02 through 2008-06-04; 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-caguas-pta-5-5400275`
- JSON: `/api/v1/mines/cantera-caguas-pta-5-5400275`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5400275/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5400275/relationships`
- MCP resource: `mine://5400275/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`