# Relationship history for MSHA mine 4400095

Current hierarchy: **CRH PLC → Appalachian Aggregates, LLC → Pounding Mill 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:** Pounding Mill Quarry Corp → Pounding Mill Plant; 1950-01-01 to 2018-07-19; source msha-controller-operator-history
- **controller_controls_mine:** William C Hunter et al → Pounding Mill Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William C Hunter et al → Pounding Mill Quarry Corp; 1950-01-01 to 2018-07-19; source msha-controller-operator-history
- **controller_controls_operator:** C Mike  Hunter Jr et al → Pounding Mill Quarry Corp; 1950-01-01 to 2018-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Boxley Materials Co → Pounding Mill Plant; 1991-03-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Pounding Mill Plant; 2016-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Aggregates, LLC → Pounding Mill Plant; 2018-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boxley Materials Co → Appalachian Aggregates, LLC; 2018-07-20 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Appalachian Aggregates, LLC; 2018-07-20 to current/open; source msha-controller-operator-history