# Relationship history for MSHA mine 3301471

Current hierarchy: **CRH PLC → Shelly Materials Inc → St Louisville 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Van Wey Sand & Gravel Inc → St Louisville Plant; 1950-01-01 to 2000-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Van Wey → St Louisville Plant; 1950-01-01 to 2000-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Van Wey → Van Wey Sand & Gravel Inc; 1950-01-01 to 2000-07-23; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → St Louisville Plant; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Van Wey Sand & Gravel Inc → St Louisville Plant; 2000-07-24 to 2003-05-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → St Louisville Plant; 2000-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Van Wey Sand & Gravel Inc; 2000-07-24 to 2003-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Shelly Materials Inc → St Louisville Plant; 2003-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Shelly Materials Inc; 2003-06-01 to current/open; source msha-controller-operator-history