# Relationship history for MSHA mine 4200470

Current hierarchy: **Energy Fuels Inc → EFR Colorado Plateau LLC → Pandora Complex**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Atlas Corp → Pandora Complex; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cleghorn & Washburn Mining Company → Pandora Complex; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cleghorn Douglas & Lark L Washburn → Pandora Complex; 1950-01-01 to 1981-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Cleghorn Douglas & Lark L Washburn → Cleghorn & Washburn Mining Company; 1950-01-01 to 1979-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Atlas Minerals → Pandora Complex; 1980-01-01 to 1998-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Atlas Corp → Atlas Minerals; 1980-01-01 to 1998-03-11; source msha-controller-operator-history
- **controller_controls_mine:** International Uranium Corp → Pandora Complex; 1997-05-10 to 2023-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Denison Mines (USA) Corp. → Pandora Complex; 1998-03-12 to 2011-04-30; source msha-controller-operator-history
- **controller_controls_operator:** International Uranium Corp → Denison Mines (USA) Corp.; 1998-03-12 to 2011-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Mike D  Shumway et al → Pandora Complex; 2005-06-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Reliance Resources LLC → Pandora Complex; 2011-05-01 to 2013-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Mike D  Shumway et al → Reliance Resources LLC; 2011-05-01 to 2013-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resources (USA) Inc. → Pandora Complex; 2013-04-08 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_operator:** International Uranium Corp → Energy Fuels Resources (USA) Inc.; 2013-04-08 to 2023-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → Pandora Complex; 2023-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → Denison Mines (USA) Corp.; 2023-02-13 to 2011-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → Energy Fuels Resources (USA) Inc.; 2023-02-13 to 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** EFR Colorado Plateau LLC → Pandora Complex; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → Pandora Complex; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → EFR Colorado Plateau LLC; 2025-02-10 to current/open; source msha-controller-operator-history