# Cortez District-Underground

- **MSHA mine ID:** 2602573
- **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:** 11,603
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Barrick Nevada Holding LLC; Newmont USA Limited (0149763) → Nevada Gold Mines LLC (0165474) → Cortez District-Underground (2602573)**

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

## Controller and operator valid-time history

- **Ronald W  Guill → Small Mine Development LLC:** 2005-11-08 through 2008-05-15; derived from co-tenure at mine 2602573; source `msha-controller-operator-history`.
- **Barrick Gold Corp → CORTEZ JOINT VENTURE:** 2008-05-16 through 2012-01-16; derived from co-tenure at mine 2602573; source `msha-controller-operator-history`.
- **Keith  Jones → Small Mine Development LLC:** 2011-01-28 through 2008-05-15; derived from co-tenure at mine 2602573; source `msha-controller-operator-history`.
- **Barrick Gold Corp → Barrick Cortez Inc.:** 2012-01-17 through 2019-06-30; derived from co-tenure at mine 2602573; source `msha-controller-operator-history`.
- **Barrick Nevada Holding LLC et al → Nevada Gold Mines LLC:** 2019-07-01 through current/open; derived from co-tenure at mine 2602573; source `msha-controller-operator-history`.
- **Newmont USA Limited et al → Nevada Gold Mines LLC:** 2019-07-01 through current/open; derived from co-tenure at mine 2602573; 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 — 20 since 2021:** Accidents and injuries 89 historical accident/injury rows; 1 coded fatalities and 1,906 lost days across the published record.
2. **COMPLIANCE — 358 since 2021:** Violations and penalties 780 violation rows across the full record; 108 carry an S&S flag and $668,980 appears in current assessed amounts.
3. **HEALTH — 210 samples:** Occupational health samples 205 personal; 5 area. 10 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 171K employee hours and 372 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 217 linked rows:** Contests, conferences and decisions 68 contested-violation rows, 68 civil-penalty docket/decision rows, and 81 conference records linked by issuance number.
6. **CONTRACTORS — 37 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 — 63 since 2021:** Inspections 174 inspection events and 9K 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 57.3360 — Ground support use.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-B/section-57.3360
- **30 CFR 57.15001 — First aid materials.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-N/section-57.15001
- **30 CFR 57.5001 — Exposure limits for airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-D/section-57.5001
- **30 CFR 57.9313 — Roadway maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-H/section-57.9313
- **30 CFR 47.42 — Label contents.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.42
- **30 CFR 57.4102 — Spillage and leakage.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4102

## Source coverage

- **Accident, Injuries, and Illnesses:** 89 rows; 2006-02-23 through 2026-05-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2008-12-09 through 2008-12-09; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 5 rows; 2009-08-07 through 2026-09-03; source ID `msha-area-samples`
- **Assessed Violations:** 759 rows; 2006-02-08 through 2026-09-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 68 rows; 2010-06-23 through 2024-10-10; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 81 rows; 2006-03-21 through 2026-08-04; source ID `msha-conferences`
- **Contested Violations:** 68 rows; 2009-05-18 through 2024-04-10; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 7,542 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1,577 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 2005-11-08 through 2019-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 174 rows; 2006-02-07 through 2026-10-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 199 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 48 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:** 205 rows; 2006-08-22 through 2026-09-03; source ID `msha-personal-health-samples`
- **Violations:** 780 rows; 2006-02-08 through 2026-10-02; 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/cortez-district-underground-2602573`
- JSON: `/api/v1/mines/cortez-district-underground-2602573`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2602573/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2602573/relationships`
- MCP resource: `mine://2602573/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`