# Relationship history for MSHA mine 4402739

Current hierarchy: **Osborne Ada Jo & Vera → Osborne Coal Yard Inc → No 1 Tipple**

- 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

- **operator_operates_mine:** Osborne Coal Yard Inc → No 1 Tipple; 1950-01-01 to 1989-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Randall → No 1 Tipple; 1950-01-01 to 1989-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Randall → Osborne Coal Yard Inc; 1950-01-01 to 1989-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Osborne Coal Yard Inc → No 1 Tipple; 1989-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Ada Jo & Vera → No 1 Tipple; 1989-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Ada Jo & Vera → Osborne Coal Yard Inc; 1989-10-18 to current/open; source msha-controller-operator-history