# Relationship history for MSHA mine 5500011

Current hierarchy: **Carlos Ortiz  Brunet → Empresas Ortiz Brunet Inc → Cantera Ortiz Brunet**

- 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

- **controller_controls_mine:** Carlos Ortiz  Brunet → Cantera Ortiz Brunet; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Empresas Ortiz Brunet Inc → Cantera Ortiz Brunet; 1984-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carlos Ortiz  Brunet → Empresas Ortiz Brunet Inc; 1984-05-01 to current/open; source msha-controller-operator-history