# Ponce Cement Plant

- **MSHA mine ID:** 5400001
- **Status:** Active
- **Type / commodity:** Facility / Cement
- **Location:** Ponce, PR
- **Operator:** Cemex de Puerto Rico
- **Controller:** Cemex S A
- **Public source rows linked:** 3,152
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Cemex S A (M09149) → Cemex de Puerto Rico (L01823) → Ponce Cement Plant (5400001)**

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

## Controller and operator valid-time history

- **Puerto Rican Cement Company Inc → Cemex de Puerto Rico:** 1950-01-01 through 2002-11-29; derived from co-tenure at mine 5400001; source `msha-controller-operator-history`.
- **Cemex S A → Cemex de Puerto Rico:** 2002-11-30 through current/open; derived from co-tenure at mine 5400001; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 — 13 since 2021:** Accidents and injuries 179 historical accident/injury rows; 0 coded fatalities and 3,301 lost days across the published record.
2. **COMPLIANCE — 67 since 2021:** Violations and penalties 673 violation rows across the full record; 262 carry an S&S flag and $1,003,007 appears in current assessed amounts.
3. **HEALTH — 210 samples:** Occupational health samples 210 personal. 14 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 213K employee hours and 269 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 658 linked rows:** Contests, conferences and decisions 305 contested-violation rows, 309 civil-penalty docket/decision rows, and 44 conference records linked by issuance number.
6. **CONTRACTORS — 12 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 — 54 since 2021:** Inspections 293 inspection events and 5K 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.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.17001 — Illumination of surface working areas.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **30 CFR 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **30 CFR 56.5002 — Exposure monitoring.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5002
- **30 CFR 56.15006 — Protective equipment and clothing for hazards and irritants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15006

## Source coverage

- **Accident, Injuries, and Illnesses:** 179 rows; 2000-01-03 through 2025-10-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1979-11-16 through 1979-11-16; source ID `msha-addresses`
- **Assessed Violations:** 623 rows; 2000-02-23 through 2026-08-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 309 rows; 2002-04-12 through 2024-09-13; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 44 rows; 2000-03-14 through 2016-07-08; source ID `msha-conferences`
- **Contested Violations:** 305 rows; 2010-02-23 through 2023-07-12; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 342 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 92 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 293 rows; 2000-02-22 through 2026-09-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 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:** 210 rows; 2001-04-03 through 2026-03-12; source ID `msha-personal-health-samples`
- **Violations:** 673 rows; 2000-02-23 through 2026-08-11; 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/ponce-cement-plant-5400001`
- JSON: `/api/v1/mines/ponce-cement-plant-5400001`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5400001/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5400001/relationships`
- MCP resource: `mine://5400001/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`