# Relationship history for MSHA mine 1401727

Current hierarchy: **Gregory D  Lair → Lair Quarries → Collen Bennet**

- 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:** Lair Quarries → Collen Bennet; 2011-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory D  Lair → Collen Bennet; 2011-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory D  Lair → Lair Quarries; 2011-01-25 to current/open; source msha-controller-operator-history