# Relationship history for MSHA mine 4601749

Current hierarchy: **Richard T  Hatfield; James E  Hatfield → Big Eagle Coal Company → No 10-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

- **operator_operates_mine:** Island Creek Coal Company → No 10-Mine; 1950-01-01 to 1973-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → No 10-Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1950-01-01 to 1973-09-01; source msha-controller-operator-history
- **controller_controls_mine:** James E  Hatfield et al → No 10-Mine; 1973-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Eagle Coal Company → No 10-Mine; 1973-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Hatfield et al → Big Eagle Coal Company; 1973-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard T  Hatfield et al → Big Eagle Coal Company; 1973-09-02 to current/open; source msha-controller-operator-history