# Relationship history for MSHA mine 2000420

Current hierarchy: **Lundin Mining Corporation → Eagle Mine LLC → Humboldt Mill**

- 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

- **operator_operates_mine:** Cleveland-Cliffs Iron Company → Humboldt Mill; 1950-01-01 to 2008-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Humboldt Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Cleveland-Cliffs Iron Company; 1950-01-01 to 2008-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rio Tinto Group → Humboldt Mill; 2008-09-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kennecott Eagle Land LLC → Humboldt Mill; 2008-10-01 to 2013-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Rio Tinto Group → Kennecott Eagle Land LLC; 2008-10-01 to 2013-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Rio Tinto Group → Humboldt Mill; 2011-09-15 to 2013-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Mine LLC → Humboldt Mill; 2013-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lundin Mining Corporation → Humboldt Mill; 2013-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lundin Mining Corporation → Eagle Mine LLC; 2013-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rio Tinto Group → Eagle Mine LLC; 2013-07-18 to 2013-07-17; source msha-controller-operator-history