# Relationship history for MSHA mine 4405620

Current hierarchy: **Earl R  Tester → R & E Coal Company Inc → No 12**

- 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:** Lester Robert F → No 12; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & E Coal Company Inc → No 12; 1981-03-01 to 1985-04-25; source msha-controller-operator-history
- **controller_controls_operator:** Lester Robert F → R & E Coal Company Inc; 1981-03-01 to 1985-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Earl R  Tester → No 12; 1985-04-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & E Coal Company Inc → No 12; 1985-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earl R  Tester → R & E Coal Company Inc; 1985-04-26 to current/open; source msha-controller-operator-history