# Relationship history for MSHA mine 0404385

Current hierarchy: **Bonn Thomas S → Natural Energy Resources Inc → Kelly Or Kelly 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Natural Energy Resources Inc → Kelly Or Kelly Mine; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bonn Thomas S → Kelly Or Kelly Mine; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bonn Thomas S → Natural Energy Resources Inc; 1980-01-01 to current/open; source msha-controller-operator-history