# Relationship history for MSHA mine 0503771

Current hierarchy: **Energy Fuels Coal Resources Ltd → Energy Fuels Mining Company → Raton Creek Mine No 1**

- 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:** Sundance Coal Company → Raton Creek Mine No 1; 1982-04-01 to 1984-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Sundance Oil Company → Raton Creek Mine No 1; 1982-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sundance Oil Company → Sundance Coal Company; 1982-04-01 to 1984-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Sundance Coal Company → Raton Creek Mine No 1; 1984-12-01 to 1987-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Sundance Resources Inc → Raton Creek Mine No 1; 1984-12-01 to 1987-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Sundance Resources Inc → Sundance Coal Company; 1984-12-01 to 1987-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Energy Fuels Mining Company → Raton Creek Mine No 1; 1987-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Energy Fuels Coal Resources Ltd → Raton Creek Mine No 1; 1987-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Energy Fuels Coal Resources Ltd → Energy Fuels Mining Company; 1987-05-30 to current/open; source msha-controller-operator-history