# Relationship history for MSHA mine 0102727

Current hierarchy: **CRH PLC → APAC Mid-South Inc → Tarrant 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:** Lohja Inc → Tarrant Quarry; 1984-03-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Ready Mix Inc → Tarrant Quarry; 1987-06-01 to 1994-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Lohja Inc → Southern Ready Mix Inc; 1987-06-01 to 1994-07-12; source msha-controller-operator-history
- **operator_operates_mine:** APAC Mid-South Inc → Tarrant Quarry; 1994-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Tarrant Quarry; 1994-07-13 to 2002-05-28; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → APAC Mid-South Inc; 1994-07-13 to 2002-05-28; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Tarrant Quarry; 2002-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC Mid-South Inc; 2002-05-29 to current/open; source msha-controller-operator-history