# Relationship history for MSHA mine 5400026

Current hierarchy: **Berrios Rafael H → Agregados Berrios Inc → Gravero Berrios**

- 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:** Agregados Berrios Inc → Gravero Berrios; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Berrios Rafael H → Gravero Berrios; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berrios Rafael H → Agregados Berrios Inc; 1950-01-01 to current/open; source msha-controller-operator-history