# El Dorado Plant

- **MSHA mine ID:** 4105335
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Winkler, TX
- **Operator:** Iron Oak Permian LLC
- **Controller:** Iron Oak Energy Solutions LLC
- **Public source rows linked:** 3,178
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Iron Oak Energy Solutions LLC (0189021) → Iron Oak Permian LLC (0160413) → El Dorado Plant (4105335)**

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

## Controller and operator valid-time history

- **John  Cross et al → ELD Operations, LLC:** 2018-02-09 through 2019-03-27; derived from co-tenure at mine 4105335; source `msha-controller-operator-history`.
- **Will  Glusac et al → ELD Operations, LLC:** 2018-02-09 through 2019-03-27; derived from co-tenure at mine 4105335; source `msha-controller-operator-history`.
- **Black Mountain Sand Holdings LLC → Iron Oak Permian LLC:** 2019-03-28 through 2024-10-31; derived from co-tenure at mine 4105335; source `msha-controller-operator-history`.
- **Iron Oak Energy Solutions LLC → Iron Oak Permian LLC:** 2024-11-01 through current/open; derived from co-tenure at mine 4105335; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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 — 15 since 2021:** Accidents and injuries 30 historical accident/injury rows; 0 coded fatalities and 955 lost days across the published record.
2. **COMPLIANCE — 316 since 2021:** Violations and penalties 374 violation rows across the full record; 69 carry an S&S flag and $297,644 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 personal. 4 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 141 linked rows:** Contests, conferences and decisions 67 contested-violation rows, 67 civil-penalty docket/decision rows, and 7 conference records linked by issuance number.
6. **CONTRACTORS — 14 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 — 38 since 2021:** Inspections 52 inspection events and 2K 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 56.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.11001 — Safe access.** (6 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004

## Source coverage

- **Accident, Injuries, and Illnesses:** 30 rows; 2018-02-06 through 2025-06-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-10-01 through 2018-10-01; source ID `msha-addresses`
- **Assessed Violations:** 370 rows; 2018-04-13 through 2026-06-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 67 rows; 2018-10-26 through 2023-10-05; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 7 rows; 2018-05-01 through 2022-03-22; source ID `msha-conferences`
- **Contested Violations:** 67 rows; 2018-04-13 through 2026-06-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,802 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 368 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2018-02-09 through 2019-03-28; source ID `msha-controller-operator-history`
- **Inspections:** 52 rows; 2018-02-21 through 2026-06-02; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 16 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:** 19 rows; 2018-07-18 through 2025-07-17; source ID `msha-personal-health-samples`
- **Violations:** 374 rows; 2018-04-05 through 2026-06-10; 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/el-dorado-plant-4105335`
- JSON: `/api/v1/mines/el-dorado-plant-4105335`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4105335/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4105335/relationships`
- MCP resource: `mine://4105335/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`