# Relationship history for MSHA mine 4405372

Current hierarchy: **CRH PLC → Mountain Materials, Inc. → Rural Retreat 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

- **controller_controls_mine:** Hodges Luther & Ernie → Rural Retreat Plant; 1978-07-01 to 1986-03-31; source msha-controller-operator-history
- **operator_operates_mine:** H & H Stone Company → Rural Retreat Plant; 1980-01-01 to 1986-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Hodges Luther & Ernie → H & H Stone Company; 1980-01-01 to 1986-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Rural Retreat Stone Inc → Rural Retreat Plant; 1986-04-01 to 1999-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Bear David F Jr → Rural Retreat Plant; 1986-04-01 to 1999-11-21; source msha-controller-operator-history
- **controller_controls_operator:** Bear David F Jr → Rural Retreat Stone Inc; 1986-04-01 to 1999-11-21; source msha-controller-operator-history
- **controller_controls_mine:** Steve L  Lawson et al → Rural Retreat Plant; 1998-09-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Materials Llc → Rural Retreat Plant; 1999-11-22 to 2005-02-09; source msha-controller-operator-history
- **controller_controls_operator:** Steve L  Lawson et al → Mountain Materials Llc; 1999-11-22 to 2005-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Rural Retreat Quarry, INC → Rural Retreat Plant; 2005-02-10 to 2006-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Steve L  Lawson et al → Rural Retreat Plant; 2005-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve L  Lawson et al → Rural Retreat Quarry, INC; 2005-02-10 to 2006-01-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Rural Retreat Plant; 2006-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Materials, Inc. → Rural Retreat Plant; 2006-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Mountain Materials, Inc.; 2006-01-31 to current/open; source msha-controller-operator-history