# Relationship history for MSHA mine 4606794

Current hierarchy: **Cummings Thomas → Cumberland Village Mining Group Inc → Alma #4**

- 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:** Cummings Thomas → Alma #4; 1980-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Village Mining Group Inc → Alma #4; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cummings Thomas → Cumberland Village Mining Group Inc; 1984-06-01 to current/open; source msha-controller-operator-history