# Relationship history for MSHA mine 0203038

Current hierarchy: **William L  Anderson; Katherine E  Anderson → Turquoise Mountain Mining LTD → Turquoise Mountain Mining LTD**

- 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:** Turquoise Mountain Mining LTD → Turquoise Mountain Mining LTD; 2004-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Katherine E  Anderson Et Al → Turquoise Mountain Mining LTD; 2004-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Katherine E  Anderson Et Al → Turquoise Mountain Mining LTD; 2004-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William L  Anderson Et Al → Turquoise Mountain Mining LTD; 2004-03-09 to current/open; source msha-controller-operator-history