# Acushnet Quarry

- **MSHA mine ID:** 1900046
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Bristol, MA
- **Operator:** P J Keating Company
- **Controller:** CRH PLC
- **Public source rows linked:** 1,623
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → P J Keating Company (L13941) → Acushnet Quarry (1900046)**

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

## Controller and operator valid-time history

- **Ashland Inc → Warren Brothers Company Inc:** 1950-01-01 through 1979-04-22; derived from co-tenure at mine 1900046; source `msha-controller-operator-history`.
- **BTR PLC → Tilcon Capaldi Inc:** 1979-04-23 through 1996-09-08; derived from co-tenure at mine 1900046; source `msha-controller-operator-history`.
- **CRH PLC → P J Keating Company:** 1996-09-09 through current/open; derived from co-tenure at mine 1900046; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 1 since 2021:** Accidents and injuries 26 historical accident/injury rows; 0 coded fatalities and 352 lost days across the published record.
2. **COMPLIANCE — 2 since 2021:** Violations and penalties 106 violation rows across the full record; 19 carry an S&S flag and $17,479 appears in current assessed amounts.
3. **HEALTH — 121 samples:** Occupational health samples 121 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 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 10 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 7 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 — 5 since 2021:** Inspections 59 inspection events and 1K 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 56.12068 — Locking transformer enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12068
- **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 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 50.20-7 — Criteria—MSHA Form 7000-1, Section D.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20-7
- **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 56.12032 — 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 56.14100 — 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 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207

## Source coverage

- **Accident, Injuries, and Illnesses:** 26 rows; 2000-03-23 through 2021-03-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-04-12 through 2022-04-12; source ID `msha-addresses`
- **Assessed Violations:** 106 rows; 2000-04-05 through 2022-01-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 10 rows; 2001-05-08 through 2016-10-27; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2005-06-10 through 2009-03-12; source ID `msha-conferences`
- **Contested Violations:** 9 rows; 2009-01-21 through 2016-01-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 627 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 155 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1996-09-09; source ID `msha-controller-operator-history`
- **Inspections:** 59 rows; 2000-04-04 through 2023-11-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 317 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 80 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:** 121 rows; 2004-02-11 through 2020-09-09; source ID `msha-personal-health-samples`
- **Violations:** 106 rows; 2000-04-05 through 2022-01-20; 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/acushnet-quarry-1900046`
- JSON: `/api/v1/mines/acushnet-quarry-1900046`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1900046/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1900046/relationships`
- MCP resource: `mine://1900046/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`