# Relationship history for MSHA mine 5400322

Current hierarchy: **Santiago Francisco → Francisco Santiago → Arenero Santiago**

- 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:** Francisco Santiago → Arenero Santiago; 1990-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Santiago Francisco → Arenero Santiago; 1990-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Santiago Francisco → Francisco Santiago; 1990-06-01 to current/open; source msha-controller-operator-history