# Relationship history for MSHA mine 1513566

Current hierarchy: **Osborne Ada Jo & Vera → Vo Jo Coals Inc → No 2**

- 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:** Lee Coals Inc → No 2; 1982-08-01 to 1983-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Mitchell → No 2; 1982-08-01 to 1983-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Mitchell → Lee Coals Inc; 1982-08-01 to 1983-02-27; source msha-controller-operator-history
- **operator_operates_mine:** Vo Jo Coals Inc → No 2; 1983-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Osborne Ada Jo & Vera → No 2; 1983-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Ada Jo & Vera → Vo Jo Coals Inc; 1983-02-28 to current/open; source msha-controller-operator-history