# Amrize Joliet S & G Underground Mine # 1

- **MSHA mine ID:** 1103084
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Limestone NEC
- **Location:** Will, IL
- **Operator:** Amrize Mid-America Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 4,023
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize Mid-America Inc. (0107425) → Amrize Joliet S & G Underground Mine # 1 (1103084)**

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

## Controller and operator valid-time history

- **Joseph D  Cooper → American Contract Miners Inc:** 2001-05-01 through 2001-10-09; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **Rein Schultz & Dahl of Illinois Inc  et al → Lafarge Joliet Inc:** 2001-10-10 through 2006-04-08; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **George L Comerford  et al → Lafarge Joliet Inc:** 2001-10-10 through 2006-04-08; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **Lafarge S A → Lafarge Joliet Inc:** 2006-04-09 through 2009-05-31; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **Lafarge S A → Amrize Mid-America Inc.:** 2009-06-01 through 2015-07-09; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Mid-America Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize Mid-America Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 1103084; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 16
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 6 since 2021:** Accidents and injuries 20 historical accident/injury rows; 1 coded fatalities and 327 lost days across the published record.
2. **COMPLIANCE — 150 since 2021:** Violations and penalties 568 violation rows across the full record; 97 carry an S&S flag and $181,213 appears in current assessed amounts.
3. **HEALTH — 391 samples:** Occupational health samples 378 personal; 13 area. 10 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 26K employee hours and 43 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 85 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 24 civil-penalty docket/decision rows, and 52 conference records linked by issuance number.
6. **CONTRACTORS — 16 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 — 44 since 2021:** Inspections 172 inspection events and 7K 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 57.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004
- **30 CFR 57.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20003
- **30 CFR 57.3200 — Correction of hazardous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3200
- **30 CFR 57.6202 — Vehicles.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6202
- **30 CFR 57.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14107
- **30 CFR 57.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.14132 — Horns and backup alarms for surface equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14132
- **30 CFR 57.3401 — Examination of ground conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3401

## Source coverage

- **Accident, Injuries, and Illnesses:** 20 rows; 2001-06-25 through 2025-12-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2001-05-03 through 2001-05-03; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 13 rows; 2016-10-05 through 2024-11-21; source ID `msha-area-samples`
- **Assessed Violations:** 562 rows; 2001-08-06 through 2026-07-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 24 rows; 2002-11-13 through 2018-02-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 52 rows; 2006-08-22 through 2026-10-09; source ID `msha-conferences`
- **Contested Violations:** 9 rows; 2006-07-24 through 2017-07-31; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,456 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; 2001-05-01 through 2009-06-01; source ID `msha-controller-operator-history`
- **Inspections:** 172 rows; 2001-06-04 through 2026-07-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 298 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 78 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:** 378 rows; 2001-11-06 through 2026-07-15; source ID `msha-personal-health-samples`
- **Violations:** 568 rows; 2001-08-06 through 2026-07-08; 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-joliet-s-g-underground-mine-1-1103084`
- JSON: `/api/v1/mines/amrize-joliet-s-g-underground-mine-1-1103084`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1103084/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1103084/relationships`
- MCP resource: `mine://1103084/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`