# Relationship history for MSHA mine 1001375

Current hierarchy: **Dakota Mining Corp → Stibnite Mine Inc → WEST END 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Superior Oil Company → WEST END MINE; 1979-11-01 to 1984-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Superior Oil Company → WEST END MINE; 1979-11-01 to 1984-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Superior Oil Company → Superior Oil Company; 1979-11-01 to 1984-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Superior Oil Company → WEST END MINE; 1984-09-28 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Mobil Corp → WEST END MINE; 1984-09-28 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Mobil Corp → Superior Oil Company; 1984-09-28 to 1986-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Stibnite Mine Inc → WEST END MINE; 1986-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dakota Mining Corp → WEST END MINE; 1986-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dakota Mining Corp → Stibnite Mine Inc; 1986-05-08 to current/open; source msha-controller-operator-history