# Relationship history for MSHA mine 5400317

Current hierarchy: **Blondet Juan (Piza) → Juan Piza Blondet → Proyecto Azur**

- 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:** Juan Piza Blondet → Proyecto Azur; 1989-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blondet Juan (Piza) → Proyecto Azur; 1989-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blondet Juan (Piza) → Juan Piza Blondet; 1989-12-01 to current/open; source msha-controller-operator-history