# Relationship history for MSHA mine 5400202

Current hierarchy: **Marina Antonio → Marina Dumping & Earth Movement → Cantera Santana**

- 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:** Marina Dumping & Earth Movement → Cantera Santana; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marina Antonio → Cantera Santana; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marina Antonio → Marina Dumping & Earth Movement; 1950-01-01 to current/open; source msha-controller-operator-history