# Relationship history for MSHA mine 1519095

Current hierarchy: **Everett  Shepherd II → Bubs Contracting Inc → Auger No 1 S/N 116**

- 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:** Bubs Contracting Inc → Auger No 1 S/N 116; 2007-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Everett  Shepherd II → Auger No 1 S/N 116; 2007-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everett  Shepherd II → Bubs Contracting Inc; 2007-03-28 to current/open; source msha-controller-operator-history