# Relationship history for MSHA mine 4406371

Current hierarchy: **CRH PLC → Appalachian Aggregates, LLC → Mouth of Wilson 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Lyalls Stone Company → Mouth of Wilson Plant; 1987-01-01 to 1996-10-22; source msha-controller-operator-history
- **controller_controls_mine:** James A  Lyalls → Mouth of Wilson Plant; 1987-01-01 to 1996-10-22; source msha-controller-operator-history
- **controller_controls_operator:** James A  Lyalls → Lyalls Stone Company; 1987-01-01 to 1996-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Boxley Materials Co → Mouth of Wilson Plant; 1991-03-01 to 2015-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Lyalls Stone Company Inc → Mouth of Wilson Plant; 1996-10-23 to 1998-12-31; source msha-controller-operator-history
- **controller_controls_mine:** W-L Construction & Paving Inc → Mouth of Wilson Plant; 1996-10-23 to 1998-12-31; source msha-controller-operator-history
- **controller_controls_operator:** W-L Construction & Paving Inc → Lyalls Stone Company Inc; 1996-10-23 to 1998-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Lyall Stone Inc → Mouth of Wilson Plant; 1999-01-01 to 2006-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Steve L  Lawson et al → Mouth of Wilson Plant; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve L  Lawson et al → Lyall Stone Inc; 1999-01-01 to 2006-01-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Mouth of Wilson Plant; 2006-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Materials Inc → Mouth of Wilson Plant; 2006-01-31 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Mountain Materials Inc; 2006-01-31 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Mouth of Wilson Plant; 2016-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Aggregates, LLC → Mouth of Wilson 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