# Davenport Cement Plant

- **MSHA mine ID:** 0404056
- **Status:** Abandoned
- **Type / commodity:** Facility / Cement
- **Location:** Santa Cruz, CA
- **Operator:** Cemex
- **Controller:** Cemex S A
- **Public source rows linked:** 2,088
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Cemex S A (M09149) → Cemex (L09964) → Davenport Cement Plant (0404056)**

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

## Controller and operator valid-time history

- **Lone Star Industries Inc → Lone Star Industries Inc:** 1950-01-01 through 1987-12-31; derived from co-tenure at mine 0404056; source `msha-controller-operator-history`.
- **RMC Group PLC → Cemex:** 1988-01-01 through 2005-02-28; derived from co-tenure at mine 0404056; source `msha-controller-operator-history`.
- **Cemex S A → Cemex:** 2005-03-01 through current/open; derived from co-tenure at mine 0404056; source `msha-controller-operator-history`.

- History rows: 3
- 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 121 historical accident/injury rows; 0 coded fatalities and 1,112 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 313 violation rows across the full record; 66 carry an S&S flag and $117,895 appears in current assessed amounts.
3. **HEALTH — 119 samples:** Occupational health samples 117 personal; 2 area. 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 62K employee hours and 119 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 145 linked rows:** Contests, conferences and decisions 17 contested-violation rows, 122 civil-penalty docket/decision rows, and 6 conference records linked by issuance number.
6. **CONTRACTORS — 9 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 2K 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 47.21 — Identifying hazardous chemicals.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-C/section-47.21
- **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 56.11002 — Handrails and toeboards.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112

## Source coverage

- **Accident, Injuries, and Illnesses:** 121 rows; 2000-01-11 through 2009-02-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2010-02-09 through 2010-02-09; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 2 rows; 2001-05-31 through 2001-05-31; source ID `msha-area-samples`
- **Assessed Violations:** 311 rows; 2000-03-17 through 2010-01-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 122 rows; 2000-07-27 through 2011-12-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2001-06-21 through 2005-01-04; source ID `msha-conferences`
- **Contested Violations:** 17 rows; 2006-08-07 through 2009-03-18; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 820 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 168 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1988-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 41 rows; 2000-03-17 through 2010-02-09; 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:** 22 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:** 117 rows; 2001-05-22 through 2008-08-26; source ID `msha-personal-health-samples`
- **Violations:** 313 rows; 2000-03-17 through 2010-01-20; 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/davenport-cement-plant-0404056`
- JSON: `/api/v1/mines/davenport-cement-plant-0404056`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404056/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404056/relationships`
- MCP resource: `mine://0404056/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`