# Relationship history for MSHA mine 0405146

Current hierarchy: **Garoogian Mike → A T & E Enterprises Inc → WILLIAM BROS 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** A T & E Enterprises Inc → WILLIAM BROS MINE; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garoogian Mike → WILLIAM BROS MINE; 1991-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garoogian Mike → A T & E Enterprises Inc; 1991-02-01 to current/open; source msha-controller-operator-history