# Relationship history for MSHA mine 2301345

Current hierarchy: **CRH PLC → Agrock Quarries Division → Cliquot 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:** Ash Grove Cement Company → Cliquot Quarry; 1950-01-01 to 2018-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Limestone Company Inc → Cliquot Quarry; 1950-01-01 to 1978-11-30; source msha-controller-operator-history
- **controller_controls_mine:** David E  Bailey  et al → Cliquot Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David E  Bailey  et al → Bailey Limestone Company Inc; 1950-01-01 to 1978-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Agrock Quarries Division → Cliquot Quarry; 1978-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ash Grove Cement Company → Agrock Quarries Division; 1978-12-01 to 2018-06-20; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Cliquot Quarry; 2018-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Agrock Quarries Division; 2018-06-21 to current/open; source msha-controller-operator-history