# Relationship history for MSHA mine 3609459

Current hierarchy: **Wilbur W  White Jr → Wilbur White Coal Co. → White #2**

- 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

- **controller_controls_mine:** Wilbur W  White Jr → White #2; 2006-06-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilbur White Coal Co. → White #2; 2006-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilbur W  White Jr → Wilbur White Coal Co.; 2006-07-27 to current/open; source msha-controller-operator-history