# Relationship history for MSHA mine 0504595

Current hierarchy: **Bennett Earl → Bennett'S Gravel → BENNETT GRAVEL**

- 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:** Bennett'S Gravel → BENNETT GRAVEL; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bennett Earl → BENNETT GRAVEL; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Earl → Bennett'S Gravel; 1997-06-01 to current/open; source msha-controller-operator-history