# Relationship history for MSHA mine 1506395

Current hierarchy: **Justice Paul Dean → Scorpio Coal Company Inc → Liberty #2 Prep 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:** Allen P Coal Company → Liberty #2 Prep Plant; 1973-01-01 to 1977-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Earl → Liberty #2 Prep Plant; 1973-01-01 to 1977-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Earl → Allen P Coal Company; 1973-01-01 to 1977-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Straight Line Coal Tipple Company Inc → Liberty #2 Prep Plant; 1977-03-21 to 1978-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Breathitt George → Liberty #2 Prep Plant; 1977-03-21 to 1978-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Breathitt George → Straight Line Coal Tipple Company Inc; 1977-03-21 to 1978-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Horne Steward Ray → Liberty #2 Prep Plant; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nippa Valley Coal Company Inc → Liberty #2 Prep Plant; 1978-07-10 to 1980-11-25; source msha-controller-operator-history
- **controller_controls_operator:** Horne Steward Ray → Nippa Valley Coal Company Inc; 1978-07-10 to 1980-11-25; source msha-controller-operator-history
- **operator_operates_mine:** Scorpio Coal Company Inc → Liberty #2 Prep Plant; 1980-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justice Paul Dean → Liberty #2 Prep Plant; 1980-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justice Paul Dean → Scorpio Coal Company Inc; 1980-11-26 to current/open; source msha-controller-operator-history