# Relationship history for MSHA mine 0405620

Current hierarchy: **David  Rogers → Ibis → Grey Eagle**

- 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:** David  Rogers → Grey Eagle; 2004-11-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ibis → Grey Eagle; 2004-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Rogers → Ibis; 2004-11-23 to current/open; source msha-controller-operator-history