# Relationship history for MSHA mine 4202406

Current hierarchy: **Mariana Copper LLC → Mariana Copper One → Lisbon Valley Mining Co**

- 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:** Mariana Copper One → Lisbon Valley Mining Co; 2005-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Constellation Copper → Lisbon Valley Mining Co; 2005-05-18 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Constellation Copper → Mariana Copper One; 2005-05-18 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Lisbon Valley Holdings LLC → Lisbon Valley Mining Co; 2009-10-01 to 2025-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Lisbon Valley Holdings LLC → Mariana Copper One; 2009-10-01 to 2025-12-15; source msha-controller-operator-history
- **controller_controls_mine:** Mariana Copper LLC → Lisbon Valley Mining Co; 2025-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mariana Copper LLC → Mariana Copper One; 2025-12-16 to current/open; source msha-controller-operator-history