# ARP Portable Crusher #2

- **MSHA mine ID:** 4500764
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Douglas, WA
- **Operator:** American Rock Products
- **Controller:** CRH PLC
- **Public source rows linked:** 934
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → American Rock Products (L09692) → ARP Portable Crusher #2 (4500764)**

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

## Controller and operator valid-time history

- **Mike  Parker → Parker'S Sand & Gravel Inc:** 1950-01-01 through 1978-08-07; derived from co-tenure at mine 4500764; source `msha-controller-operator-history`.
- **Lawrence  Sali  et al → Columbia Ready-Mix Inc:** 1978-08-08 through 2017-02-12; derived from co-tenure at mine 4500764; source `msha-controller-operator-history`.
- **Steve  Sali  et al → Columbia Ready-Mix Inc:** 1978-08-08 through 2017-02-12; derived from co-tenure at mine 4500764; source `msha-controller-operator-history`.
- **CRH PLC → American Rock Products:** 2017-02-13 through current/open; derived from co-tenure at mine 4500764; source `msha-controller-operator-history`.
- **Casey  Parker → Parker'S Sand & Gravel Inc:** 2024-01-01 through 1978-08-07; derived from co-tenure at mine 4500764; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 12
- Interval anomalies: 1
- 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 — 2 since 2021:** Accidents and injuries 14 historical accident/injury rows; 0 coded fatalities and 212 lost days across the published record.
2. **COMPLIANCE — 17 since 2021:** Violations and penalties 105 violation rows across the full record; 18 carry an S&S flag and $21,924 appears in current assessed amounts.
3. **HEALTH — 18 samples:** Occupational health samples 18 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 — 8 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 4 civil-penalty docket/decision rows, and 1 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 — 9 since 2021:** Inspections 43 inspection events and 831 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 56.14107 — 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 56.14110 — 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 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 46.5 — New miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.5
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **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 56.14207 — 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
- **30 CFR 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402

## Source coverage

- **Accident, Injuries, and Illnesses:** 14 rows; 2002-10-25 through 2024-01-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-05-07 through 2026-05-07; source ID `msha-addresses`
- **Assessed Violations:** 104 rows; 2000-01-25 through 2026-04-28; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2004-09-13 through 2012-02-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2007-11-09 through 2007-11-09; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2005-05-19 through 2010-11-01; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 297 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 90 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2017-02-13; source ID `msha-controller-operator-history`
- **Inspections:** 43 rows; 2000-01-25 through 2026-04-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 204 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 44 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:** 18 rows; 2000-11-16 through 2025-01-23; source ID `msha-personal-health-samples`
- **Violations:** 105 rows; 2000-01-25 through 2026-04-28; 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/arp-portable-crusher-2-4500764`
- JSON: `/api/v1/mines/arp-portable-crusher-2-4500764`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4500764/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4500764/relationships`
- MCP resource: `mine://4500764/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`