# Relationship history for MSHA mine 1516740

Current hierarchy: **Banks Eugene → Banks Augering Contracting Inc → No 10 Auger**

- 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:** Banks Augering Contracting Inc → No 10 Auger; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Banks Eugene → No 10 Auger; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Banks Eugene → Banks Augering Contracting Inc; 1989-10-01 to current/open; source msha-controller-operator-history