# Relationship history for MSHA mine 4606219

Current hierarchy: **Earvin K  Church II → Starbo Coal Corp → Rockford**

- 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:** Massey Energy Company → Rockford; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Trace Fork Coal Company → Rockford; 1980-08-01 to 1985-12-04; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Trace Fork Coal Company; 1980-08-01 to 1985-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Osborne  et al → Rockford; 1985-09-09 to 1990-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Star-Bo Mining Company Inc → Rockford; 1985-12-05 to 1986-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Vance Charles → Rockford; 1985-12-05 to 1986-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Vance Charles → Star-Bo Mining Company Inc; 1985-12-05 to 1986-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Soho Coal Company Inc → Rockford; 1986-01-02 to 1987-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne  et al → Soho Coal Company Inc; 1986-01-02 to 1987-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Starbo Coal Corp → Rockford; 1987-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Earvin K  Church II → Rockford; 1987-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Earvin K  Church II → Starbo Coal Corp; 1987-09-25 to current/open; source msha-controller-operator-history