# Relationship history for MSHA mine 2602470

Current hierarchy: **Hau Sun  Ho → Geo Nevada Inc → Spring Valley Mine**

- 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

- **controller_controls_mine:** Hau Sun  Ho → Spring Valley Mine; 2002-01-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Geo Nevada Inc → Spring Valley Mine; 2006-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hau Sun  Ho → Geo Nevada Inc; 2006-06-15 to current/open; source msha-controller-operator-history