# Durkee Cement Plant

- **MSHA mine ID:** 3502970
- **Status:** Active
- **Type / commodity:** Facility / Cement
- **Location:** Baker, OR
- **Operator:** Ash Grove Cement Co
- **Controller:** CRH PLC
- **Public source rows linked:** 4,919
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**CRH PLC (M06183) → Ash Grove Cement Co (L02019) → Durkee Cement Plant (3502970)**

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

## Controller and operator valid-time history

- **Oregon Portland Cement Company → Oregon Portland Cement Company:** 1979-12-01 through 1983-12-18; derived from co-tenure at mine 3502970; source `msha-controller-operator-history`.
- **Ash Grove Cement Company → Ash Grove Cement Co:** 1983-12-19 through 2018-06-20; derived from co-tenure at mine 3502970; source `msha-controller-operator-history`.
- **CRH PLC → Ash Grove Cement Co:** 2018-06-21 through current/open; derived from co-tenure at mine 3502970; 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 — 6 since 2021:** Accidents and injuries 111 historical accident/injury rows; 1 coded fatalities and 2,440 lost days across the published record.
2. **COMPLIANCE — 108 since 2021:** Violations and penalties 429 violation rows across the full record; 52 carry an S&S flag and $181,320 appears in current assessed amounts.
3. **HEALTH — 114 samples:** Occupational health samples 113 personal; 1 area. 2 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 67K employee hours and 118 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 128 linked rows:** Contests, conferences and decisions 44 contested-violation rows, 71 civil-penalty docket/decision rows, and 13 conference records linked by issuance number.
6. **CONTRACTORS — 22 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 — 26 since 2021:** Inspections 107 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 56.14112 — 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
- **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 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.18002 — 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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 111 rows; 2000-01-12 through 2026-06-04; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1980-01-28 through 1980-01-28; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2025-11-04 through 2025-11-04; source ID `msha-area-samples`
- **Assessed Violations:** 423 rows; 2000-09-26 through 2026-04-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 71 rows; 2001-06-19 through 2025-07-03; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 13 rows; 2002-02-28 through 2021-06-25; source ID `msha-conferences`
- **Contested Violations:** 44 rows; 2009-01-07 through 2025-01-15; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,974 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 511 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1979-12-01 through 1983-12-19; source ID `msha-controller-operator-history`
- **Inspections:** 107 rows; 2000-01-04 through 2026-08-05; 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:** 81 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:** 113 rows; 2000-09-27 through 2025-11-05; source ID `msha-personal-health-samples`
- **Violations:** 429 rows; 2000-09-26 through 2026-04-20; 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/durkee-cement-plant-3502970`
- JSON: `/api/v1/mines/durkee-cement-plant-3502970`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3502970/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3502970/relationships`
- MCP resource: `mine://3502970/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`