# Grandfalls

- **MSHA mine ID:** 4101916
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Ward, TX
- **Operator:** Permian Basin Materials Aggregate
- **Controller:** Amrize South Central
- **Public source rows linked:** 913
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Amrize South Central (0199260) → Permian Basin Materials Aggregate (0208253) → Grandfalls (4101916)**

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

## Controller and operator valid-time history

- **James R Porter → Porter Sand & Gravel Inc:** 1950-01-01 through 2005-03-31; derived from co-tenure at mine 4101916; source `msha-controller-operator-history`.
- **Larry  Bates  et al → Crockett County Mining:** 2005-04-01 through 2013-10-01; derived from co-tenure at mine 4101916; source `msha-controller-operator-history`.
- **W L Ross & Co LLC et al → Crockett County Mining:** 2013-10-02 through 2015-07-31; derived from co-tenure at mine 4101916; source `msha-controller-operator-history`.
- **W L Ross & Co LLC et al → Permian Basin Materials, LLC:** 2015-08-01 through 2026-02-17; derived from co-tenure at mine 4101916; 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 4101916; source `msha-controller-operator-history`.
- **Amrize South Central → Permian Basin Materials Aggregate:** 2026-02-18 through current/open; derived from co-tenure at mine 4101916; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 15
- 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 5 historical accident/injury rows; 0 coded fatalities and 405 lost days across the published record.
2. **COMPLIANCE — 32 since 2021:** Violations and penalties 218 violation rows across the full record; 50 carry an S&S flag and $102,142 appears in current assessed amounts.
3. **HEALTH — 22 samples:** Occupational health samples 22 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 12K employee hours and 28 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 27 linked rows:** Contests, conferences and decisions 13 contested-violation rows, 13 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 — 18 since 2021:** Inspections 94 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 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — 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 56.20003 — Housekeeping.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **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 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2012-06-01 through 2020-01-02; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2006-10-16 through 2006-10-16; source ID `msha-addresses`
- **Assessed Violations:** 210 rows; 2000-06-28 through 2026-02-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 13 rows; 2012-01-10 through 2022-05-19; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2022-09-30 through 2022-09-30; source ID `msha-conferences`
- **Contested Violations:** 13 rows; 2010-04-12 through 2021-11-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 54 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2026-02-18; source ID `msha-controller-operator-history`
- **Inspections:** 94 rows; 2000-06-27 through 2026-08-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 22 rows; 2004-08-11 through 2011-10-12; source ID `msha-personal-health-samples`
- **Violations:** 218 rows; 2000-06-27 through 2026-02-05; 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/grandfalls-4101916`
- JSON: `/api/v1/mines/grandfalls-4101916`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4101916/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4101916/relationships`
- MCP resource: `mine://4101916/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`