# Relationship history for MSHA mine 4604671

Current hierarchy: **Occidental Petroleum Corp → Island Creek Coal Company → 8 Brothers Reclamation**

- 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:** Occidental Petroleum Corp → 8 Brothers Reclamation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Teer Nello L Company → 8 Brothers Reclamation; 1975-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eight Brothers Mining Company Inc → 8 Brothers Reclamation; 1975-06-01 to 1977-08-31; source msha-controller-operator-history
- **controller_controls_mine:** O'Quinn Ludwell → 8 Brothers Reclamation; 1975-06-01 to 1977-08-31; source msha-controller-operator-history
- **controller_controls_operator:** O'Quinn Ludwell → Eight Brothers Mining Company Inc; 1975-06-01 to 1977-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Webster County Coal Company → 8 Brothers Reclamation; 1977-09-01 to 1981-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Teer Nello L Company → Webster County Coal Company; 1977-09-01 to 1981-02-18; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → 8 Brothers Reclamation; 1981-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1981-02-19 to current/open; source msha-controller-operator-history