# Relationship history for MSHA mine 5400136

Current hierarchy: **Rivera Rafael → Rio Hondo Aggregates Inc → Cantera Rio Hondo**

- 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:** Bayamon Aggregates Inc → Cantera Rio Hondo; 1950-01-01 to 1983-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Ramos Jesus → Cantera Rio Hondo; 1950-01-01 to 1983-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Ramos Jesus → Bayamon Aggregates Inc; 1950-01-01 to 1983-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Rio Hondo Aggregates Inc → Cantera Rio Hondo; 1983-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rivera Rafael → Cantera Rio Hondo; 1983-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rivera Rafael → Rio Hondo Aggregates Inc; 1983-01-04 to current/open; source msha-controller-operator-history