# Holcim Algonquin Pit #5

- **MSHA mine ID:** 1101170
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Mchenry, IL
- **Operator:** Holcim - MAMR, Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 802
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Holcim - MAMR, Inc. (0107425) → Holcim Algonquin Pit #5 (1101170)**

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

## Controller and operator valid-time history

- **Meyer Material Acquisition Corp Et Al → Meyer Material Company:** 1950-01-01 through 2011-07-11; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Meyer Material Company:** 2011-07-12 through 2015-07-09; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Holcim Ltd → Meyer Material Company:** 2015-07-10 through 2022-04-30; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Holcim Ltd → Holcim - MAMR, Inc.:** 2022-05-01 through 2025-06-22; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Lafarge S A → Holcim - MAMR, Inc.:** 2022-05-01 through 2015-07-09; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Amrize Ltd → Meyer Material Company:** 2025-06-23 through 2022-04-30; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.
- **Amrize Ltd → Holcim - MAMR, Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 1101170; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 14
- Interval anomalies: 2
- 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 — 1 since 2021:** Accidents and injuries 11 historical accident/injury rows; 0 coded fatalities and 20 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 127 violation rows across the full record; 12 carry an S&S flag and $14,998 appears in current assessed amounts.
3. **HEALTH — 62 samples:** Occupational health samples 62 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 3K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 10 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 2 since 2021:** Inspections 43 inspection events and 956 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 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002

## Source coverage

- **Accident, Injuries, and Illnesses:** 11 rows; 2001-11-02 through 2021-10-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-11-08 through 2022-11-08; source ID `msha-addresses`
- **Assessed Violations:** 126 rows; 2000-05-02 through 2020-10-29; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2004-11-05 through 2018-08-22; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2017-12-04 through 2017-12-29; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2004-05-26 through 2017-11-01; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 156 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 28 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 2022-05-01; source ID `msha-controller-operator-history`
- **Inspections:** 43 rows; 2000-05-02 through 2022-11-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 184 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 46 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:** 62 rows; 2001-02-22 through 2018-09-25; source ID `msha-personal-health-samples`
- **Violations:** 127 rows; 2000-05-02 through 2020-10-29; 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/holcim-algonquin-pit-5-1101170`
- JSON: `/api/v1/mines/holcim-algonquin-pit-5-1101170`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1101170/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1101170/relationships`
- MCP resource: `mine://1101170/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`