# Relationship history for MSHA mine 5400155

Current hierarchy: **Luis A  Reyes-Leon → Luis A Reyes → Gravero Reyes**

- 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:** Empresas Tito Castro Inc → Gravero Reyes; 1950-01-01 to 1992-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Jose A Castro  (Tormos) → Gravero Reyes; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose A Castro  (Tormos) → Empresas Tito Castro Inc; 1950-01-01 to 1992-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Luis A Reyes → Gravero Reyes; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Luis A  Reyes-Leon → Gravero Reyes; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luis A  Reyes-Leon → Luis A Reyes; 1992-02-01 to current/open; source msha-controller-operator-history