# Relationship history for MSHA mine 2602492

Current hierarchy: **LOUIS F  HILL → Western Placer Resources → Willow Creek Placer- Thacker P**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Western Placer Resources → Willow Creek Placer- Thacker P; 2002-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** LOUIS F  HILL → Willow Creek Placer- Thacker P; 2002-03-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LOUIS F  HILL → Western Placer Resources; 2002-03-14 to current/open; source msha-controller-operator-history