# Relationship history for MSHA mine 4605147

Current hierarchy: **CRH PLC → Appalachian Aggregates, LLC → Beckley 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Beckley Stone Company → Beckley Plant; 1950-01-01 to 1989-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Robert L  Kosnoski → Beckley Plant; 1950-01-01 to 1989-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Kosnoski → Beckley Stone Company; 1950-01-01 to 1989-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Pioneer International Ltd → Beckley Plant; 1989-01-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Mid-Atlantic Inc → Beckley Plant; 1989-05-26 to 2001-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Pioneer International Ltd → Pioneer Mid-Atlantic Inc; 1989-05-26 to 2001-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Boxley Materials Co → Beckley Plant; 1991-03-01 to 2015-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Aggregates, LLC → Beckley Plant; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boxley Materials Co → Appalachian Aggregates, LLC; 2001-07-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Beckley Plant; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Appalachian Aggregates, LLC; 2016-01-01 to current/open; source msha-controller-operator-history