# Relationship history for MSHA mine 0103083

Current hierarchy: **CRH PLC → Midsouth Aggregates → Opelika 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:** Hanson PLC → Opelika Quarry; 1988-11-14 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Opelika Quarry; 1994-07-13 to 2002-05-28; source msha-controller-operator-history
- **operator_operates_mine:** Opelika Materials Llc → Opelika Quarry; 1997-04-01 to 1999-08-15; source msha-controller-operator-history
- **controller_controls_mine:** R E Grills Construction Co Et Al → Opelika Quarry; 1997-04-01 to 1999-08-15; source msha-controller-operator-history
- **controller_controls_operator:** R E Grills Construction Co Et Al → Opelika Materials Llc; 1997-04-01 to 1999-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Aggregates Southeast, Inc. → Opelika Quarry; 1999-08-16 to 2003-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Aggregates Southeast, Inc.; 1999-08-16 to 2003-07-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Opelika Quarry; 2002-05-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Midsouth Aggregates → Opelika Quarry; 2003-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Midsouth Aggregates; 2003-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Midsouth Aggregates; 2003-07-11 to 2002-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Opelika Quarry; 2007-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Hanson Aggregates Southeast, Inc.; 2007-08-23 to 2003-07-10; source msha-controller-operator-history