# Relationship history for MSHA mine 0103197

Current hierarchy: **Leo Al Joseph → Black Beauty Coal Company Inc → Wegra Mine**

- 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

- **operator_operates_mine:** Black Beauty Coal Company Inc → Wegra Mine; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leo Al Joseph → Wegra Mine; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leo Al Joseph → Black Beauty Coal Company Inc; 2000-07-01 to current/open; source msha-controller-operator-history