# Relationship history for MSHA mine 1001839

Current hierarchy: **Apollo Gold Corporation → Black Pine Mining Inc → BLACK PINE 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

- **controller_controls_mine:** Noranda Inc → BLACK PINE MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Noranda Mining Inc → BLACK PINE MINE; 1988-09-01 to 1990-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Noranda Inc → Noranda Mining Inc; 1988-09-01 to 1990-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Black Pine Mining Inc → BLACK PINE MINE; 1990-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Apollo Gold Corporation → BLACK PINE MINE; 1990-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apollo Gold Corporation → Black Pine Mining Inc; 1990-12-04 to current/open; source msha-controller-operator-history