# Relationship history for MSHA mine 4605274

Current hierarchy: **Carroll Preston W → Clear Fork Coal Company Inc → No 1**

- 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:** Carroll Preston W → No 1; 1975-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clear Fork Coal Company Inc → No 1; 1976-09-07 to 1978-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Mullins White Jr → No 1; 1976-09-07 to 1978-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Mullins White Jr → Clear Fork Coal Company Inc; 1976-09-07 to 1978-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Clear Fork Coal Company Inc → No 1; 1978-05-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carroll Preston W → Clear Fork Coal Company Inc; 1978-05-02 to current/open; source msha-controller-operator-history