# Relationship history for MSHA mine 0200023

Current hierarchy: **Freeport-McMoRan Inc → Phelps Dodge Corp → Evans Point Lime Quarry & Aeriel Tram**

- 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:** Phelps Dodge Corp → Evans Point Lime Quarry & Aeriel Tram; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Phelps Dodge Corp → Evans Point Lime Quarry & Aeriel Tram; 1950-01-01 to 2007-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Phelps Dodge Corp → Phelps Dodge Corp; 1950-01-01 to 2007-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Freeport-McMoRan Inc → Evans Point Lime Quarry & Aeriel Tram; 2007-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeport-McMoRan Inc → Phelps Dodge Corp; 2007-03-19 to current/open; source msha-controller-operator-history