# Relationship history for MSHA mine 2900731

Current hierarchy: **Freeport-McMoRan Inc → Freeport-McMoRan Cobre Mining Company → Continental Mill Complex**

- 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:** U V Industries Inc → Continental Mill Complex; 1950-01-01 to 1992-12-31; source msha-controller-operator-history
- **controller_controls_mine:** U V Industries Inc → Continental Mill Complex; 1950-01-01 to 1992-12-31; source msha-controller-operator-history
- **controller_controls_operator:** U V Industries Inc → U V Industries Inc; 1950-01-01 to 1992-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Cobre Mining Company Inc → Continental Mill Complex; 1993-01-01 to 1998-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Metallic Ventures Gold Inc → Continental Mill Complex; 1993-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metallic Ventures Gold Inc → Cobre Mining Company Inc; 1993-01-01 to 1998-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Freeport-McMoRan Cobre Mining Company → Continental Mill Complex; 1998-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Phelps Dodge Corp → Continental Mill Complex; 1998-02-03 to 2007-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Phelps Dodge Corp → Freeport-McMoRan Cobre Mining Company; 1998-02-03 to 2007-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Freeport-McMoRan Inc → Continental Mill Complex; 2007-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeport-McMoRan Inc → Freeport-McMoRan Cobre Mining Company; 2007-03-19 to current/open; source msha-controller-operator-history