# Relationship history for MSHA mine 4601486

Current hierarchy: **Liston Glenn → Mountaineer Contractors Inc → No 1 Ug**

- 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:** Coal Lick Coal Company → No 1 Ug; 1950-01-01 to 1974-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Loyal G  Forman Jr → No 1 Ug; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loyal G  Forman Jr → Coal Lick Coal Company; 1950-01-01 to 1974-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Liston Glenn → No 1 Ug; 1974-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountaineer Contractors Inc → No 1 Ug; 1974-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liston Glenn → Mountaineer Contractors Inc; 1974-12-20 to current/open; source msha-controller-operator-history