# Amrize Swampscott Quarry

- **MSHA mine ID:** 1900020
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Traprock
- **Location:** Essex, MA
- **Operator:** Amrize Northeast Inc.
- **Controller:** Amrize Ltd
- **Public source rows linked:** 3,279
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize Ltd (0193740) → Amrize Northeast Inc. (L17298) → Amrize Swampscott Quarry (1900020)**

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

## Controller and operator valid-time history

- **James H  Cooke → Lynn Sand & Stone Company:** 1950-01-01 through 1983-08-30; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.
- **Guyott Company → Lynn Sand & Stone Company:** 1983-08-31 through 1988-05-03; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.
- **Aggregate Industries PLC → Amrize Northeast Inc.:** 2001-06-01 through 2009-04-29; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Northeast Inc.:** 2009-04-30 through 2015-07-09; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.
- **Holcim Ltd → Amrize Northeast Inc.:** 2015-07-10 through 2025-06-22; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.
- **Amrize Ltd → Amrize Northeast Inc.:** 2025-06-23 through current/open; derived from co-tenure at mine 1900020; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 15
- 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 26 historical accident/injury rows; 1 coded fatalities and 408 lost days across the published record.
2. **COMPLIANCE — 63 since 2021:** Violations and penalties 306 violation rows across the full record; 70 carry an S&S flag and $94,875 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 11K employee hours and 26 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 42 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 10 civil-penalty docket/decision rows, and 27 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 — 18 since 2021:** Inspections 97 inspection events and 3K 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 50.20 — Preparation and submission of MSHA Report Form 7000-1—Mine Accident, Injury, and Illness Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20
- **30 CFR 56.12016 — Work on electrically-powered equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12016
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500
- **30 CFR 50.10 — Immediate notification.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-B/section-50.10
- **30 CFR 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **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 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.16009 — Suspended loads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16009

## Source coverage

- **Accident, Injuries, and Illnesses:** 26 rows; 2000-06-08 through 2025-10-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-02-04 through 2013-02-04; source ID `msha-addresses`
- **Assessed Violations:** 303 rows; 2000-10-17 through 2026-05-07; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2000-12-04 through 2018-07-11; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 27 rows; 2000-11-16 through 2024-03-14; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2006-04-20 through 2017-07-10; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,805 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 392 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 1988-05-04; source ID `msha-controller-operator-history`
- **Inspections:** 97 rows; 2000-10-17 through 2026-05-07; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 233 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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; 2000-10-18 through 2022-03-29; source ID `msha-personal-health-samples`
- **Violations:** 306 rows; 2000-10-17 through 2026-05-07; 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-swampscott-quarry-1900020`
- JSON: `/api/v1/mines/amrize-swampscott-quarry-1900020`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1900020/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1900020/relationships`
- MCP resource: `mine://1900020/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`