# Relationship history for MSHA mine 4602402

Current hierarchy: **A F Budge Mining Ltd → Phoenix Resources Inc → Bergoo Preparation Plant**

- 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

- **operator_operates_mine:** Bergoo Coal Company Inc → Bergoo Preparation Plant; 1950-01-01 to 1979-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Unidyne Corp → Bergoo Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Unidyne Corp → Bergoo Coal Company Inc; 1950-01-01 to 1979-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company → Bergoo Preparation Plant; 1979-10-17 to 1984-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Poval Corporation → Bergoo Preparation Plant; 1979-10-17 to 1984-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Poval Corporation → Elk River Sewell Coal Company; 1979-10-17 to 1984-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company → Bergoo Preparation Plant; 1984-12-21 to 1989-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Bergoo Preparation Plant; 1984-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Elk River Sewell Coal Company; 1984-12-21 to 1989-03-27; source msha-controller-operator-history
- **controller_controls_mine:** A F Budge Mining Ltd → Bergoo Preparation Plant; 1985-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elk River Sewell Coal Company Inc → Bergoo Preparation Plant; 1989-03-28 to 1990-03-26; source msha-controller-operator-history
- **controller_controls_mine:** A F Budge Mining Ltd → Bergoo Preparation Plant; 1989-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Elk River Sewell Coal Company Inc; 1989-03-28 to 1990-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Resources Inc → Bergoo Preparation Plant; 1990-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Phoenix Resources Inc; 1990-03-27 to current/open; source msha-controller-operator-history