# Relationship history for MSHA mine 4104441

Current hierarchy: **CRH PLC → Texas Materials Group, Inc → Texas Materials Hergotz Plant**

- 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 → Texas Materials Hergotz Plant; 1999-07-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Austin Reclaimed Materials LP → Texas Materials Hergotz Plant; 2003-09-17 to 2011-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Aaron  Cabaza  et al → Texas Materials Hergotz Plant; 2003-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Cabaza  et al → Austin Reclaimed Materials LP; 2003-09-17 to 2011-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Marcelo  Vera  et al → Austin Reclaimed Materials LP; 2003-09-17 to 2011-02-01; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Texas Materials Hergotz Plant; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** APAC Texas, Inc. → Texas Materials Hergotz Plant; 2011-02-02 to 2017-03-12; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC Texas, Inc.; 2011-02-02 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC Texas, Inc.; 2011-02-02 to 2017-03-12; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Texas Materials Hergotz Plant; 2014-05-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle Materials Texas → Texas Materials Hergotz Plant; 2017-03-13 to 2018-11-07; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle Materials Texas; 2017-03-13 to 2018-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Texas Materials Group, Inc → Texas Materials Hergotz Plant; 2018-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Texas Materials Group, Inc; 2018-11-08 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Texas Materials Group, Inc; 2018-11-08 to current/open; source msha-controller-operator-history