# Relationship history for MSHA mine 0203044

Current hierarchy: **Freeport McMoran Copper & Gold Inc.; Bio Teq Environmental Technologies → Copreco LLC → Copreco LLC**

- 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:** Copreco LLC → Copreco LLC; 2004-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Freeport McMoran Copper & Gold Inc. et al → Copreco LLC; 2004-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeport McMoran Copper & Gold Inc. et al → Copreco LLC; 2004-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bio Teq Environmental Technologies  et al → Copreco LLC; 2004-06-01 to current/open; source msha-controller-operator-history