# Amrize Platte Valley Plant

- **MSHA mine ID:** 0504332
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Weld, CO
- **Operator:** Amrize West Central Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 611
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize West Central Inc. (L17266) → Amrize Platte Valley Plant (0504332)**

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:** 1988-03-01 through 1988-07-18; derived from co-tenure at mine 0504332; 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 0504332; source `msha-controller-operator-history`.
- **Camas Plc → Cooley Gravel Company:** 1994-08-01 through 1997-05-13; derived from co-tenure at mine 0504332; 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 0504332; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize West Central Inc.:** 2009-04-30 through 2015-07-09; derived from co-tenure at mine 0504332; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize West Central Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 0504332; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize West Central Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 0504332; 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 9 lost days across the published record.
2. **COMPLIANCE — 29 since 2021:** Violations and penalties 100 violation rows across the full record; 13 carry an S&S flag and $13,816 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 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 — 0 tons:** Quarterly production and employment 9K employee hours and 13 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 3 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 18 since 2021:** Inspections 54 inspection events and 778 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 56.14132 — 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
- **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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **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
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2000-12-26 through 2023-10-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-11-28 through 2014-11-28; source ID `msha-addresses`
- **Assessed Violations:** 98 rows; 2000-05-16 through 2025-10-02; source ID `msha-assessed-violations`
- **Conferences:** 3 rows; 2004-12-21 through 2006-01-19; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 203 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 56 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1988-03-01 through 1997-05-14; source ID `msha-controller-operator-history`
- **Inspections:** 54 rows; 2000-05-16 through 2026-09-16; 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:** 43 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:** 11 rows; 2002-04-12 through 2021-03-10; source ID `msha-personal-health-samples`
- **Violations:** 100 rows; 2000-05-16 through 2026-09-16; 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-platte-valley-plant-0504332`
- JSON: `/api/v1/mines/amrize-platte-valley-plant-0504332`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0504332/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0504332/relationships`
- MCP resource: `mine://0504332/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`