# Relationship history for MSHA mine 1515223

Current hierarchy: **Le Fevers Randall → R & L Coal'S Inc → No 3 Mine**

- 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

- **controller_controls_mine:** Osborne Ada Jo & Vera → No 3 Mine; 1983-02-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vo Jo Coals Inc → No 3 Mine; 1985-05-01 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Osborne Ada Jo & Vera → Vo Jo Coals Inc; 1985-05-01 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** R & L Coal'S Inc → No 3 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Le Fevers Randall → No 3 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Le Fevers Randall → R & L Coal'S Inc; 1985-07-01 to current/open; source msha-controller-operator-history