# Soledad Mountain Project

- **MSHA mine ID:** 0405319
- **Status:** Active
- **Type / commodity:** Surface / Gold Ore
- **Location:** Kern, CA
- **Operator:** Golden Queen Mining Company
- **Controller:** Soledad Holdings Inc
- **Public source rows linked:** 4,605
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Soledad Holdings Inc (0181041) → Golden Queen Mining Company (0136533) → Soledad Mountain Project (0405319)**

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

## Controller and operator valid-time history

- **Golden Queen Mining Company Ltd → Golden Queen Mining Company Inc:** 1997-07-01 through 2014-12-14; derived from co-tenure at mine 0405319; source `msha-controller-operator-history`.
- **Golden Queen Mining Company Ltd et al → Golden Queen Mining Company:** 2014-12-15 through 2023-11-23; derived from co-tenure at mine 0405319; source `msha-controller-operator-history`.
- **Gauss LLC et al → Golden Queen Mining Company:** 2014-12-15 through 2023-11-23; derived from co-tenure at mine 0405319; source `msha-controller-operator-history`.
- **Soledad Holdings Inc → Golden Queen Mining Company:** 2023-11-24 through current/open; derived from co-tenure at mine 0405319; 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 29 since 2021:** Accidents and injuries 60 historical accident/injury rows; 0 coded fatalities and 3,550 lost days across the published record.
2. **COMPLIANCE — 154 since 2021:** Violations and penalties 294 violation rows across the full record; 113 carry an S&S flag and $254,642 appears in current assessed amounts.
3. **HEALTH — 116 samples:** Occupational health samples 116 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 — 0 tons:** Quarterly production and employment 142K employee hours and 317 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 24 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 2 civil-penalty docket/decision rows, and 21 conference records linked by issuance number.
6. **CONTRACTORS — 20 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 — 39 since 2021:** Inspections 88 inspection events and 3K 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 56.3200 — Correction of hazardous conditions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **30 CFR 48.31 — Hazard training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.31
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.14105 — Procedures during repairs or maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14105
- **30 CFR 56.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14115

## Source coverage

- **Accident, Injuries, and Illnesses:** 60 rows; 2014-06-04 through 2026-08-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2016-01-04 through 2016-01-04; source ID `msha-addresses`
- **Assessed Violations:** 289 rows; 2015-09-01 through 2026-08-06; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2000-12-08 through 2020-06-10; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 21 rows; 2016-04-06 through 2026-06-16; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2019-12-10 through 2019-12-10; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,962 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 591 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1997-07-01 through 2014-12-15; source ID `msha-controller-operator-history`
- **Inspections:** 88 rows; 2014-02-11 through 2026-10-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 137 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 38 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:** 116 rows; 2016-03-09 through 2026-06-16; source ID `msha-personal-health-samples`
- **Violations:** 294 rows; 2015-09-01 through 2026-10-06; 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/soledad-mountain-project-0405319`
- JSON: `/api/v1/mines/soledad-mountain-project-0405319`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405319/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405319/relationships`
- MCP resource: `mine://0405319/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`