# Relationship history for MSHA mine 0203305

Current hierarchy: **Energy Fuels Inc → EFR ARIZONA STRIP LLC. → PINYON PLAIN MINE**

- 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:** International Uranium Corp → PINYON PLAIN MINE; 1997-05-10 to 2023-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resources (USA) Inc. → PINYON PLAIN MINE; 2012-09-06 to 2025-02-13; source msha-controller-operator-history
- **controller_controls_operator:** International Uranium Corp → Energy Fuels Resources (USA) Inc.; 2012-09-06 to 2023-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → PINYON PLAIN MINE; 2023-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → Energy Fuels Resources (USA) Inc.; 2023-02-13 to 2025-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → PINYON PLAIN MINE; 2025-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** EFR Arizona Strip LLC. → PINYON PLAIN MINE; 2025-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → EFR Arizona Strip LLC.; 2025-02-14 to current/open; source msha-controller-operator-history