# Relationship history for MSHA mine 4406760

Current hierarchy: **Stephen D  Halsey; Carl A  Hamilton → Mountaineer Coal Company Inc → Mountaineer No 5 Mine**

- 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

- **controller_controls_mine:** Carl A  Hamilton et al → Mountaineer No 5 Mine; 1986-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountaineer Coal Company Inc → Mountaineer No 5 Mine; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl A  Hamilton et al → Mountaineer Coal Company Inc; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen D  Halsey et al → Mountaineer Coal Company Inc; 1994-05-01 to current/open; source msha-controller-operator-history