# Relationship history for MSHA mine 2101297

Current hierarchy: **Daniel G Fox; Darwin J Fox → Luhman's Construction Company of Red Wing → Luhman's Construction Co of Red Wing**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Luhman's Construction Company of Red Wing → Luhman's Construction Co of Red Wing; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Luhman → Luhman's Construction Co of Red Wing; 1950-01-01 to 2010-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Luhman → Luhman's Construction Company of Red Wing; 1950-01-01 to 2010-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Darwin J Fox et al → Luhman's Construction Co of Red Wing; 2010-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darwin J Fox et al → Luhman's Construction Company of Red Wing; 2010-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel G Fox et al → Luhman's Construction Company of Red Wing; 2010-11-22 to current/open; source msha-controller-operator-history