# Relationship history for MSHA mine 0102547

Current hierarchy: **William A  Hughes → Capital City Asphalt Company Inc → Montgomery Asphalt Plant**

- 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:** William A  Hughes → Montgomery Asphalt Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Capital City Asphalt Company Inc → Montgomery Asphalt Plant; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William A  Hughes → Capital City Asphalt Company Inc; 1983-05-01 to current/open; source msha-controller-operator-history