# PUERTO RICO ASPHALT-BAYAMON

- **MSHA mine ID:** 5400096
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Bayamon, PR
- **Operator:** PUERTO RICO ASPHALT LLC
- **Controller:** Jorge A  Diaz-Mayoral
- **Public source rows linked:** 304
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Jorge A  Diaz-Mayoral (0155905) → PUERTO RICO ASPHALT LLC (0171133) → PUERTO RICO ASPHALT-BAYAMON (5400096)**

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

## Controller and operator valid-time history

- **Ramos Hermanos Inc → Ramos Hermanos Inc:** 1950-01-01 through 2017-07-31; derived from co-tenure at mine 5400096; source `msha-controller-operator-history`.
- **Albert  Vanniekerk → Cantera Metro LLC:** 2017-08-01 through 2018-12-05; derived from co-tenure at mine 5400096; source `msha-controller-operator-history`.
- **Omar  Rodriguez → Bayamon Aggregates & Recycling, Inc.:** 2018-12-06 through 2023-08-22; derived from co-tenure at mine 5400096; source `msha-controller-operator-history`.
- **Jorge A  Diaz-Mayoral → PUERTO RICO ASPHALT LLC:** 2023-08-23 through current/open; derived from co-tenure at mine 5400096; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 12
- 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 — 1 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 21 lost days across the published record.
2. **COMPLIANCE — 37 since 2021:** Violations and penalties 65 violation rows across the full record; 28 carry an S&S flag and $19,204 appears in current assessed amounts.
3. **HEALTH — 10 samples:** Occupational health samples 10 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 18 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 9 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 46 since 2021:** Inspections 67 inspection events and 601 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 56.14100 — 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 56.18002 — 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 56.15005 — 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 56.11001 — Safe access.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14105 — Procedures during repairs or maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14105
- **30 CFR 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2025-08-19 through 2025-08-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-12-06 through 2018-12-06; source ID `msha-addresses`
- **Assessed Violations:** 65 rows; 2017-07-31 through 2025-12-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 9 rows; 2021-03-04 through 2026-04-30; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 9 rows; 2020-07-10 through 2025-09-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 41 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 11 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 2023-08-23; source ID `msha-controller-operator-history`
- **Inspections:** 67 rows; 2017-05-12 through 2026-04-10; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 20 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:** 10 rows; 2019-08-06 through 2026-04-15; source ID `msha-personal-health-samples`
- **Violations:** 65 rows; 2017-07-31 through 2025-12-17; 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/puerto-rico-asphalt-bayamon-5400096`
- JSON: `/api/v1/mines/puerto-rico-asphalt-bayamon-5400096`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5400096/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5400096/relationships`
- MCP resource: `mine://5400096/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`