# Eureka Mine

- **MSHA mine ID:** 3503848
- **Status:** Intermittent
- **Type / commodity:** Surface / Gold Ore
- **Location:** Baker, OR
- **Operator:** Swan Mining Operations, LLC
- **Controller:** Brandon  Davis
- **Public source rows linked:** 369
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Brandon  Davis (0152661) → Swan Mining Operations, LLC (0159693) → Eureka Mine (3503848)**

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

## Controller and operator valid-time history

- **Charles R Cagle → Gambit Trade Mining, LLC:** 2016-05-23 through 2018-04-10; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Brandon  Davis et al → Swan Mining Operations, LLC:** 2018-04-11 through 2018-10-26; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Otis B Rabon et al → Swan Mining Operations, LLC:** 2018-04-11 through 2018-10-26; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Brandon  Davis → Swan Mining Operations, LLC:** 2018-10-27 through 2020-08-26; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Fred  Lewis → Misfits Mining, LLC:** 2020-08-27 through 2020-10-06; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Otis B Rabon et al → Swan Mining Operations, LLC:** 2020-10-07 through 2018-10-26; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Brandon  Davis et al → Swan Mining Operations, LLC:** 2020-10-07 through 2018-10-26; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.
- **Brandon  Davis → Swan Mining Operations, LLC:** 2020-10-07 through current/open; derived from co-tenure at mine 3503848; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 16
- Interval anomalies: 2
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 11 since 2021:** Violations and penalties 24 violation rows across the full record; 11 carry an S&S flag and $13,546 appears in current assessed amounts.
3. **HEALTH — 55 samples:** Occupational health samples 16 personal; 39 area. 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 9K employee hours and 13 summed average employees across reported subunits in the latest published quarter.
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 — 1 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 — 10 since 2021:** Inspections 17 inspection events and 250 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 56.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 48.26 — Experienced miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.26
- **30 CFR 48.25 — Training of new miners; minimum courses of instruction; hours of instruction.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.25
- **30 CFR 48.29 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.29
- **30 CFR 48.27 — Training of miners assigned to a task in which they have had no previous experience; minimum courses of instruction.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.27
- **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
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005

## Source coverage

- **Addresses of Record:** 1 rows; 2016-08-17 through 2016-08-17; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 39 rows; 2026-06-29 through 2026-08-05; source ID `msha-area-samples`
- **Assessed Violations:** 24 rows; 2017-09-19 through 2026-07-22; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2019-01-29 through 2019-01-29; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 137 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 34 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 2016-05-23 through 2020-10-07; source ID `msha-controller-operator-history`
- **Inspections:** 17 rows; 2017-05-16 through 2026-08-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 51 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **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:** 16 rows; 2017-05-16 through 2026-08-05; source ID `msha-personal-health-samples`
- **Violations:** 24 rows; 2017-09-19 through 2026-07-22; 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/eureka-mine-3503848`
- JSON: `/api/v1/mines/eureka-mine-3503848`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3503848/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3503848/relationships`
- MCP resource: `mine://3503848/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`