# Amrize Morrison Quarry

- **MSHA mine ID:** 0500864
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Jefferson, CO
- **Operator:** Amrize West Central Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 3,232
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize West Central Inc. (L17266) → Amrize Morrison Quarry (0500864)**

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

## Controller and operator valid-time history

- **J L Shiely  Company → Cooley Gravel Company:** 1950-01-01 through 1988-07-18; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **English China Clays PLC → Cooley Gravel Company:** 1988-07-19 through 1994-07-31; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **Camas Plc → Cooley Gravel Company:** 1994-08-01 through 1997-05-13; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Amrize West Central Inc.:** 1997-05-14 through 2009-04-29; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize West Central Inc.:** 2009-04-30 through 2015-07-09; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize West Central Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize West Central Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 0500864; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 18
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 8 since 2021:** Accidents and injuries 75 historical accident/injury rows; 0 coded fatalities and 702 lost days across the published record.
2. **COMPLIANCE — 110 since 2021:** Violations and penalties 403 violation rows across the full record; 85 carry an S&S flag and $179,628 appears in current assessed amounts.
3. **HEALTH — 47 samples:** Occupational health samples 47 personal. 6 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 32K employee hours and 49 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 60 linked rows:** Contests, conferences and decisions 26 contested-violation rows, 23 civil-penalty docket/decision rows, and 11 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 — 24 since 2021:** Inspections 84 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 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 56.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **30 CFR 46.9 — Records of training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100

## Source coverage

- **Accident, Injuries, and Illnesses:** 75 rows; 2000-01-19 through 2025-09-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2012-11-15 through 2012-11-15; source ID `msha-addresses`
- **Assessed Violations:** 399 rows; 2000-04-04 through 2026-04-23; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 23 rows; 2006-03-10 through 2022-11-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 11 rows; 2004-12-21 through 2022-06-10; source ID `msha-conferences`
- **Contested Violations:** 26 rows; 2004-11-22 through 2021-12-06; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,505 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 384 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 1997-05-14; source ID `msha-controller-operator-history`
- **Inspections:** 84 rows; 2000-04-04 through 2026-10-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 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:** 47 rows; 2002-02-06 through 2025-10-16; source ID `msha-personal-health-samples`
- **Violations:** 403 rows; 2000-04-04 through 2026-10-05; 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/amrize-morrison-quarry-0500864`
- JSON: `/api/v1/mines/amrize-morrison-quarry-0500864`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0500864/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0500864/relationships`
- MCP resource: `mine://0500864/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`