# Buckeye Plant

- **MSHA mine ID:** 0203165
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Maricopa, AZ
- **Operator:** Arizona Materials
- **Controller:** Summit Materials LLC
- **Public source rows linked:** 268
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Summit Materials LLC (M02046) → Arizona Materials (L01838) → Buckeye Plant (0203165)**

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

## Controller and operator valid-time history

- **Arms Length Investors LLC  et al → Arizona Materials LLC:** 2007-03-27 through 2023-06-18; derived from co-tenure at mine 0203165; source `msha-controller-operator-history`.
- **DBJ Enterprises LLC  et al → Arizona Materials LLC:** 2007-03-27 through 2023-06-18; derived from co-tenure at mine 0203165; source `msha-controller-operator-history`.
- **Harold  Elam → Arizona Materials:** 2023-06-19 through 2011-03-31; derived from co-tenure at mine 0203165; source `msha-controller-operator-history`.
- **Summit Materials LLC → Arizona Materials:** 2023-06-19 through current/open; derived from co-tenure at mine 0203165; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 19 since 2021:** Violations and penalties 58 violation rows across the full record; 17 carry an S&S flag and $9,699 appears in current assessed amounts.
3. **HEALTH — 3 samples:** Occupational health samples 1 personal; 2 area. 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 14 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 8 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 — 8 since 2021:** Inspections 31 inspection events and 265 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 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **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 56.12032 — 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 56.9300 — 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 56.14132 — 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 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **30 CFR 56.12006 — Distribution boxes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12006

## Source coverage

- **Addresses of Record:** 1 rows; 2025-06-01 through 2025-06-01; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 2 rows; 2016-09-21 through 2016-09-21; source ID `msha-area-samples`
- **Assessed Violations:** 58 rows; 2007-07-10 through 2024-04-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2011-06-15 through 2021-10-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 8 rows; 2007-08-15 through 2008-02-13; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2010-04-30 through 2021-01-07; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 2007-03-27 through 2023-06-19; source ID `msha-controller-operator-history`
- **Inspections:** 31 rows; 2007-07-09 through 2025-09-17; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 78 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 20 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:** 1 rows; 2010-05-25 through 2010-05-25; source ID `msha-personal-health-samples`
- **Violations:** 58 rows; 2007-07-10 through 2024-04-15; 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/buckeye-plant-0203165`
- JSON: `/api/v1/mines/buckeye-plant-0203165`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0203165/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0203165/relationships`
- MCP resource: `mine://0203165/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`