# Relationship history for MSHA mine 4608511

Current hierarchy: **Richard F  Baugh → Corbin Coal Inc → No 1 Mine (1)**

- 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:** Corbin Coal Inc → No 1 Mine (1); 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard F  Baugh → No 1 Mine (1); 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard F  Baugh → Corbin Coal Inc; 1995-06-01 to current/open; source msha-controller-operator-history