# Revenue Mine

- **MSHA mine ID:** 0503528
- **Status:** NonProducing
- **Type / commodity:** Underground / Silver Ore
- **Location:** Ouray, CO
- **Operator:** Thorin Resources
- **Controller:** Clem  Borkowski
- **Public source rows linked:** 2,924
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Clem  Borkowski (0184501) → Thorin Resources (0191793) → Revenue Mine (0503528)**

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

## Controller and operator valid-time history

- **Ranchers Exploration & Development Corp → Toro De Plata Inc:** 1980-08-01 through 1984-08-28; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Hecla Mining Company → Hecla Mining Company:** 1984-08-29 through 2011-10-18; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **James  Williams et al → Star Mine Operations, LLC:** 2011-10-19 through 2014-09-30; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Rory  Williams et al → Star Mine Operations, LLC:** 2011-10-19 through 2014-09-30; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Fortune Minerals Limited → Ouray Silver Mines Inc.:** 2014-10-01 through 2015-07-21; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Lascaux Resource Capital Fund I LP → Ouray Silver Mines Inc.:** 2015-07-22 through 2023-10-19; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Sturges D  Karban → Thorin Resources:** 2023-10-20 through 2024-04-09; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.
- **Clem  Borkowski → Thorin Resources:** 2024-04-10 through current/open; derived from co-tenure at mine 0503528; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 20
- 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 — 4 since 2021:** Accidents and injuries 73 historical accident/injury rows; 2 coded fatalities and 2,166 lost days across the published record.
2. **COMPLIANCE — 36 since 2021:** Violations and penalties 376 violation rows across the full record; 169 carry an S&S flag and $406,114 appears in current assessed amounts.
3. **HEALTH — 117 samples:** Occupational health samples 116 personal; 1 area. 5 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 — 398 linked rows:** Contests, conferences and decisions 199 contested-violation rows, 196 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 — 46 since 2021:** Inspections 134 inspection events and 6K 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 57.4431 — Surface storage restrictions.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4431
- **30 CFR 57.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14116
- **30 CFR 57.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14205
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 57.11053 — Escape and evacuation plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11053
- **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 57.16005 — 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 57.12006 — Distribution boxes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12006
- **30 CFR 57.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14101
- **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
- **30 CFR 48.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-A/section-48.9

## Source coverage

- **Accident, Injuries, and Illnesses:** 73 rows; 2012-08-09 through 2021-11-22; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-04-08 through 2022-04-08; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2015-08-26 through 2015-08-26; source ID `msha-area-samples`
- **Assessed Violations:** 363 rows; 2011-10-19 through 2026-08-20; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 196 rows; 2015-10-02 through 2022-08-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2017-07-14 through 2017-11-28; source ID `msha-conferences`
- **Contested Violations:** 199 rows; 2013-12-04 through 2021-11-23; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,183 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 216 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1980-08-01 through 2023-10-20; source ID `msha-controller-operator-history`
- **Inspections:** 134 rows; 2011-10-19 through 2026-08-31; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 54 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; 2013-07-10 through 2025-06-10; source ID `msha-personal-health-samples`
- **Violations:** 376 rows; 2011-10-19 through 2026-08-20; 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/revenue-mine-0503528`
- JSON: `/api/v1/mines/revenue-mine-0503528`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0503528/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0503528/relationships`
- MCP resource: `mine://0503528/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`