# Amrize Suzy Kost Pit #21

- **MSHA mine ID:** 2103256
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Clay, MN
- **Operator:** AMRIZE MID-AMERICA INC.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 1,178
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → AMRIZE MID-AMERICA INC. (0107425) → Amrize Suzy Kost Pit #21 (2103256)**

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

## Controller and operator valid-time history

- **Aggregate Industries PLC → Camas Minndak Inc:** 2000-06-01 through 2002-03-06; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Aggregate Industries, Inc.:** 2002-03-07 through 2003-11-25; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Amrize Midwest Inc.:** 2003-11-26 through 2009-04-29; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Holcim Ltd → Aggregate Industries, Inc.:** 2009-04-30 through 2003-11-25; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Midwest Inc.:** 2009-04-30 through 2015-07-09; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Holcim Ltd → Aggregate Industries, Inc.:** 2015-07-10 through 2003-11-25; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Midwest Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Amrize Ltd → Aggregate Industries, Inc.:** 2025-06-23 through 2003-11-25; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize Midwest Inc.:** 2025-06-23 through 2026-04-14; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Holcim Ltd → AMRIZE MID-AMERICA INC.:** 2026-04-15 through 2025-06-22; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Amrize Ltd → AMRIZE MID-AMERICA INC.:** 2026-04-15 through current/open; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.
- **Lafarge S A → AMRIZE MID-AMERICA INC.:** 2026-04-15 through 2015-07-09; derived from co-tenure at mine 2103256; source `msha-controller-operator-history`.

- History rows: 12
- Typed edges: 23
- Interval anomalies: 5
- 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 — 0 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 1 lost days across the published record.
2. **COMPLIANCE — 9 since 2021:** Violations and penalties 85 violation rows across the full record; 11 carry an S&S flag and $11,365 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 13 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 1K employee hours and 4 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 7 since 2021:** Inspections 44 inspection events and 527 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 56.11001 — 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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **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 56.14110 — Flying or falling materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14110
- **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 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.14108 — Overhead drive belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14108
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2001-05-24 through 2018-06-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2000-06-23 through 2000-06-23; source ID `msha-addresses`
- **Assessed Violations:** 85 rows; 2001-05-10 through 2026-08-05; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2005-09-20 through 2005-09-20; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 669 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 126 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 12 rows; 2000-06-01 through 2026-04-15; source ID `msha-controller-operator-history`
- **Inspections:** 44 rows; 2000-06-26 through 2026-08-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 104 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 13 rows; 2005-07-06 through 2023-11-15; source ID `msha-personal-health-samples`
- **Violations:** 85 rows; 2001-05-10 through 2026-08-05; 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-suzy-kost-pit-21-2103256`
- JSON: `/api/v1/mines/amrize-suzy-kost-pit-21-2103256`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2103256/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2103256/relationships`
- MCP resource: `mine://2103256/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`