# Amrize Conco Western Stone

- **MSHA mine ID:** 1102931
- **Status:** Active
- **Type / commodity:** Underground / Crushed, Broken Limestone NEC
- **Location:** Kane, IL
- **Operator:** Amrize Mid-America Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 3,540
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize Mid-America Inc. (0107425) → Amrize Conco Western Stone (1102931)**

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

## Controller and operator valid-time history

- **Lyle C  Sitterly Jr → Lafarge Conco Western Inc:** 1992-09-01 through 2006-10-05; derived from co-tenure at mine 1102931; source `msha-controller-operator-history`.
- **Lafarge S A → Lafarge Conco Western Inc:** 2006-10-06 through 2009-11-01; derived from co-tenure at mine 1102931; source `msha-controller-operator-history`.
- **Lafarge S A → Amrize Mid-America Inc.:** 2009-11-02 through 2015-07-09; derived from co-tenure at mine 1102931; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Mid-America Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 1102931; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize Mid-America Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 1102931; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 12
- 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 — 3 since 2021:** Accidents and injuries 11 historical accident/injury rows; 0 coded fatalities and 310 lost days across the published record.
2. **COMPLIANCE — 134 since 2021:** Violations and penalties 551 violation rows across the full record; 102 carry an S&S flag and $188,005 appears in current assessed amounts.
3. **HEALTH — 389 samples:** Occupational health samples 352 personal; 37 area. 28 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 23K employee hours and 37 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 104 linked rows:** Contests, conferences and decisions 19 contested-violation rows, 24 civil-penalty docket/decision rows, and 61 conference records linked by issuance number.
6. **CONTRACTORS — 11 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 — 52 since 2021:** Inspections 177 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 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032
- **30 CFR 57.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004
- **30 CFR 57.4460 — Storage of flammable liquids underground.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4460
- **30 CFR 57.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14112
- **30 CFR 57.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4200
- **30 CFR 57.14130 — Roll-over protective structures (ROPS) and seat belts for surface equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14130
- **30 CFR 57.11058 — Check-in, check-out system.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11058
- **30 CFR 57.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4101
- **30 CFR 57.11051 — Escape routes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11051
- **30 CFR 57.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3200
- **30 CFR 57.15031 — Location of self-rescue devices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-N/section-57.15031

## Source coverage

- **Accident, Injuries, and Illnesses:** 11 rows; 2001-01-24 through 2022-12-14; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1996-10-07 through 1996-10-07; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 37 rows; 2011-02-09 through 2023-10-31; source ID `msha-area-samples`
- **Assessed Violations:** 547 rows; 2000-01-19 through 2026-08-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 24 rows; 2001-08-24 through 2023-04-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 61 rows; 2007-03-14 through 2026-03-23; source ID `msha-conferences`
- **Contested Violations:** 19 rows; 2005-11-29 through 2022-10-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,086 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 223 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1992-09-01 through 2009-11-02; source ID `msha-controller-operator-history`
- **Inspections:** 177 rows; 2000-01-18 through 2026-08-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 359 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 86 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:** 352 rows; 2001-05-02 through 2025-11-19; source ID `msha-personal-health-samples`
- **Violations:** 551 rows; 2000-01-19 through 2026-08-13; 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-conco-western-stone-1102931`
- JSON: `/api/v1/mines/amrize-conco-western-stone-1102931`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1102931/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1102931/relationships`
- MCP resource: `mine://1102931/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`