# Relationship history for MSHA mine 4001819

Current hierarchy: **Roger E  West → Royal Jellico Coal Company 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Harbert → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Coal Corp → No 2; 1975-01-01 to 1978-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Harbert → Cumberland Coal Corp; 1975-01-01 to 1978-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → No 2; 1976-10-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Royal Jellico Coal Company Inc → No 2; 1978-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Royal Jellico Coal Company Inc; 1978-04-27 to current/open; source msha-controller-operator-history