# Relationship history for MSHA mine 2100559

Current hierarchy: **Daniel G Fox; Darwin J Fox → Luhmans Construction Company → Bryan Pit And Mill**

- 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:** Luhmans Construction Company → Bryan Pit And Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Luhman → Bryan Pit And Mill; 1950-01-01 to 2010-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Luhman → Luhmans Construction Company; 1950-01-01 to 2010-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Daniel G Fox et al → Bryan Pit And Mill; 2010-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel G Fox et al → Luhmans Construction Company; 2010-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darwin J Fox et al → Luhmans Construction Company; 2010-11-22 to current/open; source msha-controller-operator-history