# Relationship history for MSHA mine 4102594

Current hierarchy: **English China Clays PLC → Southern Clay Products Inc → Southern Clay Plant & Pits**

- 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:** Southern Clay Products Inc → Southern Clay Plant & Pits; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** English China Clays PLC → Southern Clay Plant & Pits; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** English China Clays PLC → Southern Clay Products Inc; 1950-01-01 to current/open; source msha-controller-operator-history