# NM Crusher #1 (portable)

- **MSHA mine ID:** 2901258
- **Status:** Active
- **Type / commodity:** Surface / Sand, Common
- **Location:** San Juan, NM
- **Operator:** Four Corners Materials
- **Controller:** CRH PLC
- **Public source rows linked:** 558
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Four Corners Materials (L16678) → NM Crusher #1 (portable) (2901258)**

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

## Controller and operator valid-time history

- **Gregg K  Price → San Juan Concrete Company:** 1950-01-01 through 1997-03-31; derived from co-tenure at mine 2901258; source `msha-controller-operator-history`.
- **CRH PLC → Four Corners Materials:** 1998-01-05 through current/open; derived from co-tenure at mine 2901258; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 82 violation rows across the full record; 23 carry an S&S flag and $11,595 appears in current assessed amounts.
3. **HEALTH — 43 samples:** Occupational health samples 43 personal. 3 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 — 21 linked rows:** Contests, conferences and decisions 8 contested-violation rows, 8 civil-penalty docket/decision rows, and 5 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 14 since 2021:** Inspections 75 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 56.5001 — Exposure limits for airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **30 CFR 56.4230 — Self-propelled equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4230
- **30 CFR 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.14200 — Warnings prior to starting or moving equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14200
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.4101 — Warning signs.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **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 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2009-01-28 through 2009-01-28; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-01-23 through 2026-01-23; source ID `msha-addresses`
- **Assessed Violations:** 78 rows; 2000-07-11 through 2025-01-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 8 rows; 2008-03-27 through 2017-07-26; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 5 rows; 2005-08-25 through 2008-05-22; source ID `msha-conferences`
- **Contested Violations:** 8 rows; 2006-11-21 through 2016-11-16; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 1997-04-01; source ID `msha-controller-operator-history`
- **Inspections:** 75 rows; 2000-01-10 through 2026-09-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 202 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 52 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:** 43 rows; 2000-07-11 through 2025-08-26; source ID `msha-personal-health-samples`
- **Violations:** 82 rows; 2000-07-11 through 2025-01-10; 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/nm-crusher-1-portable-2901258`
- JSON: `/api/v1/mines/nm-crusher-1-portable-2901258`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2901258/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2901258/relationships`
- MCP resource: `mine://2901258/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`