# Relationship history for MSHA mine 0503613

Current hierarchy: **George  Glasier → Pinon Ridge Mining LLC → Topaz**

- 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:** Pioneer Corp → Topaz; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Uravan Inc → Topaz; 1980-11-01 to 2006-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer Corp → Pioneer Uravan Inc; 1980-11-01 to 2006-07-18; source msha-controller-operator-history
- **controller_controls_mine:** International Uranium Corp → Topaz; 1997-05-10 to 2023-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Dianna L  Reams → Topaz; 2005-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tomcat Mining Corporation → Topaz; 2006-07-19 to 2006-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Dianna L  Reams → Tomcat Mining Corporation; 2006-07-19 to 2006-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Resource (USA) Inc. → Topaz; 2006-12-04 to 2019-04-28; source msha-controller-operator-history
- **controller_controls_operator:** International Uranium Corp → Energy Fuels Resource (USA) Inc.; 2006-12-04 to 2019-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Pinon Ridge Mining LLC → Topaz; 2019-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Glasier → Topaz; 2019-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Glasier → Pinon Ridge Mining LLC; 2019-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Inc → Topaz; 2023-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Inc → Energy Fuels Resource (USA) Inc.; 2023-02-13 to 2019-04-28; source msha-controller-operator-history