# Relationship history for MSHA mine 3610269

Current hierarchy: **Chad  Lewis → Chad Lewis Stone → Chad Lewis Stone**

- 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:** Chad Lewis Stone → Chad Lewis Stone; 2018-11-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chad  Lewis → Chad Lewis Stone; 2018-11-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Lewis → Chad Lewis Stone; 2018-11-27 to current/open; source msha-controller-operator-history