# Relationship history for MSHA mine 5400479

Current hierarchy: **Jim  Cruz → Concretos de PR Inc → Arenas de Puerto Rico**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Concretos de PR Inc → Arenas de Puerto Rico; 2009-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Cruz → Arenas de Puerto Rico; 2009-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Cruz → Concretos de PR Inc; 2009-03-02 to current/open; source msha-controller-operator-history