# El Nino

- **MSHA mine ID:** 2602830
- **Status:** Active
- **Type / commodity:** Underground / Gold Ore
- **Location:** Eureka, NV
- **Operator:** Nevada Gold Mines LLC
- **Controller:** Barrick Nevada Holding LLC; Newmont USA Limited
- **Public source rows linked:** 1,049
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Barrick Nevada Holding LLC; Newmont USA Limited (0149763) → Nevada Gold Mines LLC (0165474) → El Nino (2602830)**

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

## Controller and operator valid-time history

- **Barrick Gold Corp → Barrick Goldstrike Mines, Inc:** 2018-09-11 through 2019-07-22; derived from co-tenure at mine 2602830; source `msha-controller-operator-history`.
- **Newmont USA Limited et al → Nevada Gold Mines LLC:** 2019-07-23 through current/open; derived from co-tenure at mine 2602830; source `msha-controller-operator-history`.
- **Barrick Nevada Holding LLC et al → Nevada Gold Mines LLC:** 2019-07-23 through current/open; derived from co-tenure at mine 2602830; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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 — 8 since 2021:** Accidents and injuries 12 historical accident/injury rows; 0 coded fatalities and 235 lost days across the published record.
2. **COMPLIANCE — 103 since 2021:** Violations and penalties 115 violation rows across the full record; 10 carry an S&S flag and $72,811 appears in current assessed amounts.
3. **HEALTH — 27 samples:** Occupational health samples 21 personal; 6 area. 3 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 — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 36 since 2021:** Inspections 48 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 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 57.4130 — Surface electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4130
- **30 CFR 57.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004
- **30 CFR 57.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4102
- **30 CFR 57.8520 — Ventilation plan.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-G/section-57.8520
- **30 CFR 57.4761 — Underground shops.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4761
- **30 CFR 57.8531 — Construction and maintenance of ventilation doors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-G/section-57.8531
- **30 CFR 57.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-O/section-57.16005
- **30 CFR 57.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14115

## Source coverage

- **Accident, Injuries, and Illnesses:** 12 rows; 2019-02-26 through 2026-01-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-07-01 through 2018-07-01; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 6 rows; 2022-08-10 through 2025-10-08; source ID `msha-area-samples`
- **Assessed Violations:** 113 rows; 2019-01-09 through 2026-08-12; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2020-06-24 through 2020-06-24; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 565 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 138 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 2018-09-11 through 2019-07-23; source ID `msha-controller-operator-history`
- **Inspections:** 48 rows; 2018-08-07 through 2026-08-12; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 25 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:** 21 rows; 2019-11-21 through 2025-10-08; source ID `msha-personal-health-samples`
- **Violations:** 115 rows; 2019-01-09 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/el-nino-2602830`
- JSON: `/api/v1/mines/el-nino-2602830`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2602830/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2602830/relationships`
- MCP resource: `mine://2602830/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`