# Relationship history for MSHA mine 0901059

Current hierarchy: **Ecc Group Plc & Champion International Corp → Ecc International → Buffalo China Clays Company**

- 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

- **controller_controls_mine:** Ecc Group Plc & Champion International Corp → Buffalo China Clays Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ecc International → Buffalo China Clays Company; 1990-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ecc Group Plc & Champion International Corp → Ecc International; 1990-12-01 to current/open; source msha-controller-operator-history