# Relationship history for MSHA mine 0102233

Current hierarchy: **Black Don → Mineral Extractors Inc → Me-9**

- 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

- **controller_controls_mine:** Black Don → Me-9; 1976-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mineral Extractors Inc → Me-9; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Black Don → Mineral Extractors Inc; 1980-08-01 to current/open; source msha-controller-operator-history