# Relationship history for MSHA mine 1512747

Current hierarchy: **Robert C  Gregory Sr. → Cross Over Mining Company Inc → Crossover Mining Company**

- 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:** James W  Croley → Crossover Mining Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Corp Of America Inc → Crossover Mining Company; 1981-02-01 to 1981-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Resources Inc → Crossover Mining Company; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Resources Inc → Coal Corp Of America Inc; 1981-02-01 to 1981-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Golden Glow Coals Inc → Crossover Mining Company; 1981-07-28 to 1983-05-09; source msha-controller-operator-history
- **controller_controls_operator:** James W  Croley → Golden Glow Coals Inc; 1981-07-28 to 1983-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Gregory Sr. → Crossover Mining Company; 1983-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cross Over Mining Company Inc → Crossover Mining Company; 1983-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Gregory Sr. → Cross Over Mining Company Inc; 1983-05-10 to current/open; source msha-controller-operator-history