# Pandora Complex

- **MSHA mine ID:** 4200470
- **Status:** Abandoned
- **Type / commodity:** Underground / Uranium Ore
- **Location:** San Juan, UT
- **Operator:** EFR Colorado Plateau LLC
- **Controller:** Energy Fuels Inc
- **Public source rows linked:** 780
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Energy Fuels Inc (0175160) → EFR Colorado Plateau LLC (0200615) → Pandora Complex (4200470)**

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

## Controller and operator valid-time history

- **Cleghorn Douglas & Lark L Washburn → Cleghorn & Washburn Mining Company:** 1950-01-01 through 1979-12-31; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **Atlas Corp → Atlas Minerals:** 1980-01-01 through 1998-03-11; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **International Uranium Corp → Denison Mines (USA) Corp.:** 1998-03-12 through 2011-04-30; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **Mike D  Shumway et al → Reliance Resources LLC:** 2011-05-01 through 2013-04-07; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **International Uranium Corp → Energy Fuels Resources (USA) Inc.:** 2013-04-08 through 2023-02-12; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **Energy Fuels Inc → Denison Mines (USA) Corp.:** 2023-02-13 through 2011-04-30; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **Energy Fuels Inc → Energy Fuels Resources (USA) Inc.:** 2023-02-13 through 2025-02-09; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.
- **Energy Fuels Inc → EFR Colorado Plateau LLC:** 2025-02-10 through current/open; derived from co-tenure at mine 4200470; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 20
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 13 historical accident/injury rows; 1 coded fatalities and 465 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 134 violation rows across the full record; 33 carry an S&S flag and $159,622 appears in current assessed amounts.
3. **HEALTH — 151 samples:** Occupational health samples 148 personal; 3 area. 17 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 — 90 linked rows:** Contests, conferences and decisions 46 contested-violation rows, 44 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 44 inspection events and 2K 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 57.12005 — Protection of power conductors from mobile equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12005
- **30 CFR 57.11058 — Check-in, check-out system.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11058
- **30 CFR 57.6306 — Loading, blasting, and security.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6306
- **30 CFR 57.6205 — Conveying explosives by hand.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6205
- **30 CFR 57.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4201
- **30 CFR 57.5037 — Radon daughter exposure monitoring.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-D/section-57.5037
- **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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 57.20011 — Barricades and warning signs.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20011
- **30 CFR 57.11054 — Communication with refuge chambers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-J/section-57.11054
- **30 CFR 57.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004

## Source coverage

- **Accident, Injuries, and Illnesses:** 13 rows; 2008-07-30 through 2011-09-16; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-01-16 through 2013-01-16; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 3 rows; 2010-01-27 through 2010-01-27; source ID `msha-area-samples`
- **Assessed Violations:** 131 rows; 2007-01-04 through 2012-08-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 44 rows; 2010-04-21 through 2013-06-19; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 46 rows; 2008-01-25 through 2012-05-24; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 148 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 40 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1950-01-01 through 2025-02-10; source ID `msha-controller-operator-history`
- **Inspections:** 44 rows; 2007-01-03 through 2014-09-24; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 19 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:** 148 rows; 2007-12-05 through 2012-11-14; source ID `msha-personal-health-samples`
- **Violations:** 134 rows; 2007-01-04 through 2012-08-08; 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/pandora-complex-4200470`
- JSON: `/api/v1/mines/pandora-complex-4200470`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4200470/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4200470/relationships`
- MCP resource: `mine://4200470/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`