# Relationship history for MSHA mine 3609622

Current hierarchy: **Jackie  Thomas; Robert J  Thomas → TNT Quarries → Rozell's Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** TNT Quarries → Rozell's Quarry; 2008-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackie  Thomas et al → Rozell's Quarry; 2008-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackie  Thomas et al → TNT Quarries; 2008-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  Thomas et al → TNT Quarries; 2008-05-08 to current/open; source msha-controller-operator-history