# Relationship history for MSHA mine 1511362

Current hierarchy: **Osborne Gary → Osborne & Preston Coals Inc → Adkins Branch Mine No 1**

- 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 & Preston Coals Inc → Adkins Branch Mine No 1; 1978-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Gary → Adkins Branch Mine No 1; 1978-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Gary → Osborne & Preston Coals Inc; 1978-06-01 to current/open; source msha-controller-operator-history