# Relationship history for MSHA mine 0600778

Current hierarchy: **Thomas  Butler; Robert  Butler → Butler Company → American 1**

- 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:** Butler Company → American 1; 2013-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Butler et al → American 1; 2013-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Butler et al → Butler Company; 2013-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Butler et al → Butler Company; 2013-06-10 to current/open; source msha-controller-operator-history