# Buckhorn

- **MSHA mine ID:** 4105372
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Pecos, TX
- **Operator:** Permian Basin Materials Aggregate
- **Controller:** Amrize South Central
- **Public source rows linked:** 140
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Amrize South Central (0199260) → Permian Basin Materials Aggregate (0208253) → Buckhorn (4105372)**

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

## Controller and operator valid-time history

- **W L Ross & Co LLC et al → Permian Basin Materials LLC:** 2018-06-20 through 2026-02-17; derived from co-tenure at mine 4105372; source `msha-controller-operator-history`.
- **Amrize South Central → Permian Basin Materials LLC:** 2026-02-18 through 2026-02-17; derived from co-tenure at mine 4105372; source `msha-controller-operator-history`.
- **Amrize South Central → Permian Basin Materials Aggregate:** 2026-02-18 through current/open; derived from co-tenure at mine 4105372; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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: 2026-10-18T09:31:49.615908+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 — 18 since 2021:** Violations and penalties 20 violation rows across the full record; 1 carry an S&S flag and $3,017 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 522 employee hours and 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 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 — 10 since 2021:** Inspections 13 inspection events and 74 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 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **30 CFR 56.9100 — Traffic control.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9100
- **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 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 46.7 — New task training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7
- **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 56.14107 — 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 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112

## Source coverage

- **Addresses of Record:** 1 rows; 2023-10-10 through 2023-10-10; source ID `msha-addresses`
- **Assessed Violations:** 20 rows; 2019-07-19 through 2026-04-23; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2025-07-28 through 2025-07-28; source ID `msha-conferences`
- **Controller and Operator History:** 3 rows; 2018-06-20 through 2026-02-18; source ID `msha-controller-operator-history`
- **Inspections:** 13 rows; 2019-07-19 through 2026-06-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 64 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 17 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 20 rows; 2019-07-19 through 2026-04-23; 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/buckhorn-4105372`
- JSON: `/api/v1/mines/buckhorn-4105372`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4105372/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4105372/relationships`
- MCP resource: `mine://4105372/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`