# Relationship history for MSHA mine 4405869

Current hierarchy: **Billy Ray  Dotson → Brian Coal Company Inc → No 3**

- 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:** Dotson Rail & Dexter → No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & D Coal Company → No 3; 1982-03-01 to 1986-12-15; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Rail & Dexter → R & D Coal Company; 1982-03-01 to 1986-12-15; source msha-controller-operator-history
- **controller_controls_mine:** Billy Ray  Dotson → No 3; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brian Coal Company Inc → No 3; 1986-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy Ray  Dotson → Brian Coal Company Inc; 1986-12-16 to current/open; source msha-controller-operator-history