# Relationship history for MSHA mine 4400165

Current hierarchy: **CRH PLC → Appalachian Aggregates, LLC → CASTLEWOOD 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:** Medusa Corp → CASTLEWOOD PLANT; 1950-01-01 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → CASTLEWOOD PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** White Stone Company Of Southwest Virginia → CASTLEWOOD PLANT; 1950-01-01 to 1997-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Blaine Scott  White → CASTLEWOOD PLANT; 1950-01-01 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Blaine Scott  White → White Stone Company Of Southwest Virginia; 1950-01-01 to 1997-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Boxley Materials Co → CASTLEWOOD PLANT; 1991-03-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → CASTLEWOOD PLANT; 1994-09-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Medusa Minerals Company → CASTLEWOOD PLANT; 1997-08-28 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Medusa Corp → Medusa Minerals Company; 1997-08-28 to 1998-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Southdown Inc → CASTLEWOOD PLANT; 1998-06-30 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Southdown Inc; 1998-06-30 to 2000-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Inc → CASTLEWOOD PLANT; 2000-11-03 to 2002-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Inc; 2000-11-03 to 2002-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle Stone Products → CASTLEWOOD PLANT; 2002-10-18 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → CASTLEWOOD PLANT; 2002-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle Stone Products; 2002-10-18 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → CASTLEWOOD PLANT; 2005-12-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle Industrial Minerals, Inc. → CASTLEWOOD PLANT; 2006-01-01 to 2008-12-28; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle Industrial Minerals, Inc.; 2006-01-01 to 2008-12-28; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → CASTLEWOOD PLANT; 2006-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Materials, Inc. → CASTLEWOOD PLANT; 2008-12-29 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Mountain Materials, Inc.; 2008-12-29 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → CASTLEWOOD PLANT; 2016-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Aggregates, LLC → CASTLEWOOD PLANT; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boxley Materials Co → Appalachian Aggregates, LLC; 2021-01-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Appalachian Aggregates, LLC; 2021-01-01 to current/open; source msha-controller-operator-history