# Relationship history for MSHA mine 4604547

Current hierarchy: **Anderson John P → W Va Auger Corp → No 1 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:** Occidental Petroleum Corp → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → No 1 Mine; 1975-03-31 to 1976-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1975-03-31 to 1976-06-23; source msha-controller-operator-history
- **operator_operates_mine:** W Va Auger Corp → No 1 Mine; 1976-06-24 to 1979-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Carman Donald C → No 1 Mine; 1976-06-24 to 1979-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Carman Donald C → W Va Auger Corp; 1976-06-24 to 1979-02-20; source msha-controller-operator-history
- **operator_operates_mine:** W Va Auger Corp → No 1 Mine; 1979-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anderson John P → No 1 Mine; 1979-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson John P → W Va Auger Corp; 1979-02-21 to current/open; source msha-controller-operator-history