# Relationship history for MSHA mine 3400040

Current hierarchy: **CRH PLC → APAC-Central, Inc → Pawhuska 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ashland Inc → Pawhuska Quarry; 1950-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** James O  Bell → Pawhuska Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sedan Limestone Company Inc → Pawhuska Quarry; 1950-01-01 to 1995-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Richard E  Blake et al → Pawhuska Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard E  Blake et al → Sedan Limestone Company Inc; 1950-01-01 to 1995-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Bellco Materials Inc → Pawhuska Quarry; 1995-03-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_operator:** James O  Bell → Bellco Materials Inc; 1995-03-01 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Pawhuska Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Oklahoma Inc → Pawhuska Quarry; 2008-01-01 to 2009-12-25; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Oklahoma Inc; 2008-01-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Oklahoma Inc; 2008-01-01 to 2009-12-25; source msha-controller-operator-history
- **operator_operates_mine:** APAC-Central, Inc → Pawhuska Quarry; 2009-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC-Central, Inc; 2009-12-26 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC-Central, Inc; 2009-12-26 to current/open; source msha-controller-operator-history