# Relationship history for MSHA mine 1000531

Current hierarchy: **Thompson Creek Metals Co USA → Thompson Creek Mining Company → Thompson Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Centennial Development Company → Thompson Creek Mine; 1950-01-01 to 1979-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Bovee David → Thompson Creek Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bovee David → Centennial Development Company; 1950-01-01 to 1979-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Cyprus Exploration → Thompson Creek Mine; 1979-05-23 to 1981-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Mines Corp → Thompson Creek Mine; 1979-05-23 to 1981-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Mines Corp → Cyprus Exploration; 1979-05-23 to 1981-03-12; source msha-controller-operator-history
- **operator_operates_mine:** Cyprus Thompson Creek Mining Company → Thompson Creek Mine; 1981-03-13 to 1993-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Thompson Creek Mine; 1981-03-13 to 1993-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cyprus Thompson Creek Mining Company; 1981-03-13 to 1993-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Thompson Creek Mining Company → Thompson Creek Mine; 1993-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven  Mooney → Thompson Creek Mine; 1993-11-16 to 2006-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Mooney → Thompson Creek Mining Company; 1993-11-16 to 2006-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Creek Metals Co USA → Thompson Creek Mine; 2006-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Creek Metals Co USA → Thompson Creek Mining Company; 2006-11-10 to current/open; source msha-controller-operator-history