# MineralTech Gulf Coast Abrasives, LLC

- **MSHA mine ID:** 4103973
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Harris, TX
- **Operator:** MineralTech Gulf Coast Abrasives, LLC
- **Controller:** Robert Glenn  McClain; Gregory  Angel; Shawn L  Barnes; Gary  Angel
- **Public source rows linked:** 485
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Robert Glenn  McClain; Gregory  Angel; Shawn L  Barnes; Gary  Angel (0138221) → MineralTech Gulf Coast Abrasives, LLC (0155033) → MineralTech Gulf Coast Abrasives, LLC (4103973)**

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

## Controller and operator valid-time history

- **Danny C  Moore  et al → Megasand Enterprises, Inc.:** 1997-09-01 through 2020-03-31; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Greg  Angel et al → Megasand Enterprises, Inc.:** 1997-09-01 through 2020-03-31; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Gary  Angel et al → Megasand Enterprises, Inc.:** 2020-04-01 through 2022-07-19; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Greg  Angel et al → Megasand Enterprises, Inc.:** 2020-04-01 through 2022-07-19; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Shawn L  Barnes et al → MineralTech Gulf Coast Abrasives, LLC:** 2022-07-20 through current/open; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Gregory  Angel et al → MineralTech Gulf Coast Abrasives, LLC:** 2022-07-20 through current/open; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Gary  Angel et al → MineralTech Gulf Coast Abrasives, LLC:** 2022-07-20 through current/open; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.
- **Robert Glenn  McClain et al → MineralTech Gulf Coast Abrasives, LLC:** 2022-07-20 through current/open; derived from co-tenure at mine 4103973; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 13
- Interval anomalies: 0
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 18 lost days across the published record.
2. **COMPLIANCE — 36 since 2021:** Violations and penalties 159 violation rows across the full record; 53 carry an S&S flag and $43,099 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 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 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 18 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 10 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 — 12 since 2021:** Inspections 58 inspection events and 712 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 56.4201 — 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 56.14112 — Construction and maintenance of guards.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.11012 — Protection for openings around travelways.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **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 56.12032 — 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 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2015-08-16 through 2020-07-30; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2020-03-16 through 2020-03-16; source ID `msha-addresses`
- **Assessed Violations:** 157 rows; 2000-06-27 through 2026-06-30; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2012-06-25 through 2015-09-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 10 rows; 2003-04-10 through 2012-06-06; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2010-04-20 through 2014-12-01; source ID `msha-contested-violations`
- **Controller and Operator History:** 8 rows; 1997-09-01 through 2022-07-20; source ID `msha-controller-operator-history`
- **Inspections:** 58 rows; 2000-06-27 through 2026-06-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 23 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 45 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:** 12 rows; 2008-04-15 through 2026-07-01; source ID `msha-personal-health-samples`
- **Violations:** 159 rows; 2000-06-27 through 2026-06-30; 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/mineraltech-gulf-coast-abrasives-llc-4103973`
- JSON: `/api/v1/mines/mineraltech-gulf-coast-abrasives-llc-4103973`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4103973/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4103973/relationships`
- MCP resource: `mine://4103973/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`