# Relationship history for MSHA mine 2302320

Current hierarchy: **CRH PLC → APAC-Central Inc → Lanagan Quarry**

- 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

- **controller_controls_mine:** Ashland Inc → Lanagan Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Lanagan Quarry; 1998-02-03 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Missouri Inc → Lanagan Quarry; 2005-07-29 to 2010-09-29; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Missouri Inc; 2005-07-29 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Lanagan Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Missouri Inc; 2006-08-28 to 2010-09-29; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Central Inc → Lanagan Quarry; 2010-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Central Inc; 2010-09-30 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Central Inc; 2010-09-30 to current/open; source msha-controller-operator-history