# Relationship history for MSHA mine 0203525

Current hierarchy: **Silver Bullet Mines Corp → Silver Bullet Arizona Inc → Champion 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:** Silver Bullet Mines Corp → Champion Mine; 2023-12-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silver Bullet Arizona Inc → Champion Mine; 2025-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Silver Bullet Mines Corp → Silver Bullet Arizona Inc; 2025-03-28 to current/open; source msha-controller-operator-history