# Relationship history for MSHA mine 0202653

Current hierarchy: **KGHM Polska Miedz S A → Carlota Copper Company → Carlota Copper Company**

- 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:** Carlota Copper Company → Carlota Copper Company; 1996-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cambior Inc → Carlota Copper Company; 1996-02-01 to 2005-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Cambior Inc → Carlota Copper Company; 1996-02-01 to 2005-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Quadra Mining Ltd → Carlota Copper Company; 2005-12-21 to 2012-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Quadra Mining Ltd → Carlota Copper Company; 2005-12-21 to 2012-03-20; source msha-controller-operator-history
- **controller_controls_mine:** KGHM Polska Miedz S A → Carlota Copper Company; 2012-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** KGHM Polska Miedz S A → Carlota Copper Company; 2012-03-21 to current/open; source msha-controller-operator-history