# Relationship history for MSHA mine 3900918

Current hierarchy: **Richard C  Lundin → Lundin Construction Company Inc → Meink Pit**

- 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:** Lundin Construction Company Inc → Meink Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard C  Lundin  et al → Meink Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Lundin  et al → Lundin Construction Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history