# Relationship history for MSHA mine 0901204

Current hierarchy: **CRH PLC → Midsouth Aggregates → Warren County 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:** U S Aggregate Inc → Warren County Quarry; 1994-07-13 to 2002-05-28; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Warren County Quarry; 2002-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Warren County Quarry; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Warren County Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Midsouth Aggregates → Warren County Quarry; 2010-08-25 to 2020-01-16; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Midsouth Aggregates; 2010-08-25 to 2020-01-16; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Midsouth Aggregates; 2010-08-25 to 2002-05-28; source msha-controller-operator-history
- **operator_operates_mine:** Midsouth Aggregates → Warren County Quarry; 2020-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Midsouth Aggregates; 2020-01-17 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Midsouth Aggregates; 2020-01-17 to current/open; source msha-controller-operator-history