# Amrize Marblehead Aggregates

- **MSHA mine ID:** 3300099
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Ottawa, OH
- **Operator:** Amrize Great Lakes Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 5,017
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize Great Lakes Inc. (L16652) → Amrize Marblehead Aggregates (3300099)**

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

## Controller and operator valid-time history

- **Standard Slag Company → Standard Slag Company:** 1950-01-01 through 1989-11-14; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Lafarge S A → Lafarge Corp:** 1989-11-15 through 2001-08-31; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Lafarge S A → Lafarge North America Inc.:** 2001-09-01 through 2015-07-09; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Holcim Ltd → Lafarge North America Inc.:** 2015-07-10 through 2018-08-31; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Great Lakes Inc.:** 2018-09-01 through 2025-06-22; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Lafarge S A → Amrize Great Lakes Inc.:** 2018-09-01 through 2015-07-09; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize Great Lakes Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 3300099; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 18
- Interval anomalies: 1
- 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 — 5 since 2021:** Accidents and injuries 47 historical accident/injury rows; 0 coded fatalities and 376 lost days across the published record.
2. **COMPLIANCE — 164 since 2021:** Violations and penalties 590 violation rows across the full record; 109 carry an S&S flag and $216,038 appears in current assessed amounts.
3. **HEALTH — 95 samples:** Occupational health samples 95 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 24K employee hours and 60 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 47 linked rows:** Contests, conferences and decisions 18 contested-violation rows, 18 civil-penalty docket/decision rows, and 11 conference records linked by issuance number.
6. **CONTRACTORS — 17 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 — 51 since 2021:** Inspections 167 inspection events and 4K 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 56.20003 — Housekeeping.** (7 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.23002 — Written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23002
- **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 56.12004 — 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 46.7 — New task training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7

## Source coverage

- **Accident, Injuries, and Illnesses:** 47 rows; 2000-01-20 through 2025-02-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1998-11-05 through 1998-11-05; source ID `msha-addresses`
- **Assessed Violations:** 587 rows; 2001-01-23 through 2026-08-16; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 18 rows; 2007-01-29 through 2017-07-06; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 11 rows; 2015-03-13 through 2024-05-08; source ID `msha-conferences`
- **Contested Violations:** 18 rows; 2006-01-10 through 2016-01-21; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,473 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 606 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 2018-09-01; source ID `msha-controller-operator-history`
- **Inspections:** 167 rows; 2001-01-23 through 2026-09-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 316 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 80 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:** 95 rows; 2002-01-09 through 2026-02-17; source ID `msha-personal-health-samples`
- **Violations:** 590 rows; 2001-01-23 through 2026-08-16; 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-marblehead-aggregates-3300099`
- JSON: `/api/v1/mines/amrize-marblehead-aggregates-3300099`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3300099/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3300099/relationships`
- MCP resource: `mine://3300099/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`