# Relationship history for MSHA mine 0405685

Current hierarchy: **John  Bremer → Rentrac Inc → Corona Clay**

- 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:** Rentrac Inc → Corona Clay; 2006-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Bremer → Corona Clay; 2006-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Bremer → Rentrac Inc; 2006-05-15 to current/open; source msha-controller-operator-history