# IROCK TC20 HSI

- **MSHA mine ID:** 2902477
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Eddy, NM
- **Operator:** United Materials, LLP
- **Controller:** GMS Inc; David  Shoup
- **Public source rows linked:** 42
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**GMS Inc; David  Shoup (0118025) → United Materials, LLP (0138654) → IROCK TC20 HSI (2902477)**

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

## Controller and operator valid-time history

- **GMS Inc et al → United Materials, LLP:** 2017-09-05 through current/open; derived from co-tenure at mine 2902477; source `msha-controller-operator-history`.
- **David  Shoup et al → United Materials, LLP:** 2017-09-05 through current/open; derived from co-tenure at mine 2902477; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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: 2026-10-18T09:31:49.615908+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 — 0 since 2021:** Violations and penalties 5 violation rows across the full record; 0 carry an S&S flag and $602 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 2 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 671 employee hours and 4 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 — 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 — 0 since 2021:** Inspections 5 inspection events and 17 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 62.120 — Action level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120
- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.11017 — Inclined fixed ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11017
- **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

## Source coverage

- **Addresses of Record:** 1 rows; 2019-11-13 through 2019-11-13; source ID `msha-addresses`
- **Assessed Violations:** 5 rows; 2018-02-05 through 2019-09-24; source ID `msha-assessed-violations`
- **Controller and Operator History:** 2 rows; 2017-09-05 through 2017-09-05; source ID `msha-controller-operator-history`
- **Inspections:** 5 rows; 2018-02-05 through 2019-09-19; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 16 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 5 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:** 2 rows; 2018-06-05 through 2019-09-19; source ID `msha-personal-health-samples`
- **Violations:** 5 rows; 2018-02-05 through 2019-09-24; 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/irock-tc20-hsi-2902477`
- JSON: `/api/v1/mines/irock-tc20-hsi-2902477`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2902477/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2902477/relationships`
- MCP resource: `mine://2902477/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`