# Relationship history for MSHA mine 0103138

Current hierarchy: **CRH PLC → APAC - Southeast Inc → Plant 73201**

- 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:** Ashland Inc → Plant 73201; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Superfos America Inc → Plant 73201; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Couch Construction L P → Plant 73201; 1999-02-01 to 2003-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Superfos America Inc → Couch Construction L P; 1999-02-01 to 2003-02-11; source msha-controller-operator-history
- **operator_operates_mine:** APAC - Alabama, Inc. → Plant 73201; 2003-02-12 to 2004-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC - Alabama, Inc.; 2003-02-12 to 2004-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Plant 73201; 2003-03-31 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** APAC - Southeast Inc → Plant 73201; 2004-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → APAC - Southeast Inc; 2004-05-20 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Plant 73201; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → APAC - Southeast Inc; 2006-08-28 to current/open; source msha-controller-operator-history