# Relationship history for MSHA mine 0102594

Current hierarchy: **Boren Russell F → Gun Mining Company Inc → Nyota 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Boren Russell F → Nyota Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blount Contractors Inc → Nyota Mine; 1984-05-01 to 1987-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Marsh John R → Nyota Mine; 1984-05-01 to 1987-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Marsh John R → Blount Contractors Inc; 1984-05-01 to 1987-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Gun Mining Company Inc → Nyota Mine; 1987-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boren Russell F → Gun Mining Company Inc; 1987-03-25 to current/open; source msha-controller-operator-history