# Relationship history for MSHA mine 1507476

Current hierarchy: **Rex  Fought → Aero Energy Inc → No 2**

- 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

- **controller_controls_mine:** Occidental Petroleum Corp → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Creek Coal Company → No 2; 1974-01-01 to 1993-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Island Creek Coal Company; 1974-01-01 to 1993-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Fought → No 2; 1989-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joby  Fields → No 2; 1993-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Coal Corp → No 2; 1993-06-18 to 1994-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Joby  Fields → Black Diamond Coal Corp; 1993-06-18 to 1994-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Aero Energy Inc → No 2; 1994-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Aero Energy Inc; 1994-03-07 to current/open; source msha-controller-operator-history