# Relationship history for MSHA mine 0900022

Current hierarchy: **CRH PLC → Big River Industries Inc → Galite #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

- **controller_controls_mine:** Ashland Inc → Galite #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** W H  Lane  et al → Galite #1; 1950-01-01 to 1987-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Ashland-Warren Inc → Galite #1; 1977-05-01 to 1979-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Ashland-Warren Inc; 1977-05-01 to 1979-09-13; source msha-controller-operator-history
- **operator_operates_mine:** Big River Industries Inc → Galite #1; 1979-09-14 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** W H  Lane  et al → Big River Industries Inc; 1979-09-14 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Big River Industries Inc → Galite #1; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Galite #1; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Big River Industries Inc; 1987-10-01 to current/open; source msha-controller-operator-history