# Relationship history for MSHA mine 5400403

Current hierarchy: **Galiano Domingo Rivera → Arenero Humacao → ARENERO HUMACAO - 923**

- 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:** Arenero Humacao → ARENERO HUMACAO - 923; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Galiano Domingo Rivera → ARENERO HUMACAO - 923; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Galiano Domingo Rivera → Arenero Humacao; 1997-10-01 to current/open; source msha-controller-operator-history