# Relationship history for MSHA mine 2302183

Current hierarchy: **CRH PLC → APAC-Central → BELLA VISTA QUARRY & PLANT**

- 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 → BELLA VISTA QUARRY & PLANT; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Joseph L  Parker Jr → BELLA VISTA QUARRY & PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anchor Stone Company → BELLA VISTA QUARRY & PLANT; 1999-05-01 to 2001-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Joseph L  Parker Jr → Anchor Stone Company; 1999-05-01 to 2001-07-08; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Central → BELLA VISTA QUARRY & PLANT; 2001-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Central; 2001-07-09 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → BELLA VISTA QUARRY & PLANT; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Central; 2006-08-28 to current/open; source msha-controller-operator-history