# Relationship history for MSHA mine 4604690

Current hierarchy: **Liston Glenn → Mountaineer Contractors Inc → No 8 Strip**

- 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:** Liston Glenn → No 8 Strip; 1974-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountaineer Contractors Inc → No 8 Strip; 1975-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liston Glenn → Mountaineer Contractors Inc; 1975-07-01 to current/open; source msha-controller-operator-history