# Relationship history for MSHA mine 5400392

Current hierarchy: **Jaime (Rodriguez)  Dorta → Agregados Piedra Blanca Inc → Agregados Piedra Blanca Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Agregados Piedra Blanca Inc → Agregados Piedra Blanca Inc; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jaime (Rodriguez)  Dorta → Agregados Piedra Blanca Inc; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jaime (Rodriguez)  Dorta → Agregados Piedra Blanca Inc; 1997-03-01 to current/open; source msha-controller-operator-history