# Amarillo Pit

- **MSHA mine ID:** 4105509
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Oldham, TX
- **Operator:** NM Energy LLC
- **Controller:** GCC SAB de CV
- **Public source rows linked:** 364
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**GCC SAB de CV (M10343) → NM Energy LLC (0198913) → Amarillo Pit (4105509)**

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

## Controller and operator valid-time history

- **Gravity Segregation LLC et al → Alta Rock, LLC:** 2020-07-09 through 2015-12-20; derived from co-tenure at mine 4105509; source `msha-controller-operator-history`.
- **David  Knudsen et al → Alta Rock, LLC:** 2020-07-09 through 2015-12-20; derived from co-tenure at mine 4105509; source `msha-controller-operator-history`.
- **Alta Rock Ventures, LLC → Alta Rock, LLC:** 2020-07-09 through 2024-10-29; derived from co-tenure at mine 4105509; source `msha-controller-operator-history`.
- **GCC SAB de CV → NM Energy LLC:** 2024-10-30 through current/open; derived from co-tenure at mine 4105509; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- Interval anomalies: 2
- 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 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 34 since 2021:** Violations and penalties 34 violation rows across the full record; 5 carry an S&S flag and $11,405 appears in current assessed amounts.
3. **HEALTH — 7 samples:** Occupational health samples 7 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 8K employee hours and 11 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 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 — 15 since 2021:** Inspections 15 inspection events and 233 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 56.14132 — 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 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.4402 — 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
- **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 56.4101 — 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 56.14209 — Safety procedures for towing.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14209
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2021-02-01 through 2021-02-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-02-11 through 2026-02-11; source ID `msha-addresses`
- **Assessed Violations:** 34 rows; 2021-02-22 through 2026-08-12; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 187 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 49 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2020-07-09 through 2024-10-30; source ID `msha-controller-operator-history`
- **Inspections:** 15 rows; 2021-02-22 through 2026-08-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 7 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:** 7 rows; 2021-02-24 through 2024-10-02; source ID `msha-personal-health-samples`
- **Violations:** 34 rows; 2021-02-22 through 2026-08-12; 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/amarillo-pit-4105509`
- JSON: `/api/v1/mines/amarillo-pit-4105509`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4105509/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4105509/relationships`
- MCP resource: `mine://4105509/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`