# Relationship history for MSHA mine 1501283

Current hierarchy: **Jackson J L → Black Eagle & Diamond R Coal Company → No 1 A Strip**

- 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 Eagle & Diamond R Coal Company → No 1 A Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson J L → No 1 A Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson J L → Black Eagle & Diamond R Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history