# Tonkin Springs

- **MSHA mine ID:** 2601933
- **Status:** Abandoned
- **Type / commodity:** Surface / Gold Ore
- **Location:** Eureka, NV
- **Operator:** Tonkin Springs LLC
- **Controller:** U S Gold Corporation
- **Public source rows linked:** 107
- **Source coverage:** 8 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**U S Gold Corporation (M13112) → Tonkin Springs LLC (L17194) → Tonkin Springs (2601933)**

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

## Controller and operator valid-time history

- **William W  Reed → Tonkin Springs Gold Mining Company:** 1985-08-01 through 1991-02-12; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.
- **Homestake Mining Co & Tonkin Springs Gold Mining C → Denay Creek Gold Mining Company:** 1991-02-13 through 1997-08-28; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.
- **Globex Mining Enterprises Inc → Gold Capital Corp:** 1997-08-29 through 1999-04-30; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.
- **U S Gold Corporation → Tonkin Springs LLC:** 1999-05-01 through 2003-07-31; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.
- **Bactech Enviromet Corp & U S Gold Corp → Bactech Nevada Corporation:** 2003-08-01 through 2005-05-11; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.
- **U S Gold Corporation → Tonkin Springs LLC:** 2005-05-12 through current/open; derived from co-tenure at mine 2601933; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- 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 — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 15 violation rows across the full record; 0 carry an S&S flag and $939 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 960 employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 0 since 2021:** Inspections 9 inspection events and 104 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 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **30 CFR 56.16003 — Storage of hazardous materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16003
- **30 CFR 57.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12028
- **30 CFR 57.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14100
- **30 CFR 57.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-Q/section-57.18002
- **30 CFR 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 56.18010 — First aid.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18010
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30

## Source coverage

- **Addresses of Record:** 1 rows; 2006-06-23 through 2006-06-23; source ID `msha-addresses`
- **Assessed Violations:** 13 rows; 2000-06-19 through 2003-10-22; source ID `msha-assessed-violations`
- **Controller and Operator History:** 6 rows; 1985-08-01 through 2005-05-12; source ID `msha-controller-operator-history`
- **Inspections:** 9 rows; 2000-05-25 through 2005-08-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 49 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 13 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 15 rows; 2000-06-19 through 2003-10-22; 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/tonkin-springs-2601933`
- JSON: `/api/v1/mines/tonkin-springs-2601933`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2601933/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2601933/relationships`
- MCP resource: `mine://2601933/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`