# Relationship history for MSHA mine 0102624

Current hierarchy: **Russell R Don → Central Mining Inc → Nauvoo Rail Site**

- 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:** Russell R Don → Nauvoo Rail Site; 1984-06-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Central Mining Inc → Nauvoo Rail Site; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell R Don → Central Mining Inc; 1985-05-01 to current/open; source msha-controller-operator-history