# Relationship history for MSHA mine 2901880

Current hierarchy: **Jones Leroy → Lucina Mining Inc → Goat Ridge**

- 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:** Volcano Mining Company → Goat Ridge; 1982-02-01 to 1989-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Williams James A-Dolan C Campbell Et Al → Goat Ridge; 1982-02-01 to 1989-02-05; source msha-controller-operator-history
- **controller_controls_operator:** Williams James A-Dolan C Campbell Et Al → Volcano Mining Company; 1982-02-01 to 1989-02-05; source msha-controller-operator-history
- **operator_operates_mine:** Lucina Mining Inc → Goat Ridge; 1989-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Leroy → Goat Ridge; 1989-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Leroy → Lucina Mining Inc; 1989-02-06 to current/open; source msha-controller-operator-history