# Relationship history for MSHA mine 2600204

Current hierarchy: **Broyles Joseph E & William O → Joseph E & William O Broyles → Morning Star & Morning Glory**

- 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:** Joseph E & William O Broyles → Morning Star & Morning Glory; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Broyles Joseph E & William O → Morning Star & Morning Glory; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Broyles Joseph E & William O → Joseph E & William O Broyles; 1950-01-01 to current/open; source msha-controller-operator-history