# Relationship history for MSHA mine 4300113

Current hierarchy: **CRH PLC → Pike Industries → GUILDHALL SAND & GRAVEL**

- 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

- **operator_operates_mine:** Lawrence Sangravco Inc → GUILDHALL SAND & GRAVEL; 1950-01-01 to 1983-05-03; source msha-controller-operator-history
- **controller_controls_mine:** F Ray  Lawrence → GUILDHALL SAND & GRAVEL; 1950-01-01 to 1983-05-03; source msha-controller-operator-history
- **controller_controls_operator:** F Ray  Lawrence → Lawrence Sangravco Inc; 1950-01-01 to 1983-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Lawrence Sangravco Inc → GUILDHALL SAND & GRAVEL; 1983-05-04 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Rita M  Calkins → GUILDHALL SAND & GRAVEL; 1983-05-04 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Rita M  Calkins → Lawrence Sangravco Inc; 1983-05-04 to 1995-09-30; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → GUILDHALL SAND & GRAVEL; 1988-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Newport Sand & Gravel Co/Carroll Concrete → GUILDHALL SAND & GRAVEL; 1995-10-01 to 2026-02-08; source msha-controller-operator-history
- **controller_controls_mine:** Shaun P  Carroll → GUILDHALL SAND & GRAVEL; 1995-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shaun P  Carroll → Newport Sand & Gravel Co/Carroll Concrete; 1995-10-01 to 2026-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries → GUILDHALL SAND & GRAVEL; 2026-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries; 2026-02-09 to current/open; source msha-controller-operator-history