# Relationship history for MSHA mine 0504816

Current hierarchy: **Energy Fuels Inc → EFR Colorado Plateau LLC → WHIRLWIND 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 → WHIRLWIND MINE; 1997-05-10 to 2023-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Little Maverick Mining → WHIRLWIND MINE; 2005-04-27 to 2006-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Ed L  Hopkins et al → WHIRLWIND MINE; 2005-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ed L  Hopkins et al → Little Maverick Mining; 2005-04-27 to 2006-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Lee V  Sutherland et al → Little Maverick Mining; 2005-04-27 to 2006-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Incorporated → WHIRLWIND MINE; 2006-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resources → WHIRLWIND MINE; 2006-12-11 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Incorporated → Energy Fuels Resources; 2006-12-11 to 2012-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resources (USA) Inc. → WHIRLWIND MINE; 2012-09-01 to 2025-02-09; source msha-controller-operator-history
- **controller_controls_operator:** International Uranium Corp → Energy Fuels Resources (USA) Inc.; 2012-09-01 to 2023-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → WHIRLWIND 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 2025-02-09; source msha-controller-operator-history
- **operator_operates_mine:** EFR Colorado Plateau LLC → WHIRLWIND MINE; 2025-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → WHIRLWIND MINE; 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