# Relationship history for MSHA mine 2103846

Current hierarchy: **Brad A  Vogt; Richard G  Vogt → RBS Excavating LLC → Berger Pit**

- 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:** RBS Excavating LLC → Berger Pit; 2015-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard G  Vogt et al → Berger Pit; 2015-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Vogt et al → RBS Excavating LLC; 2015-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad A  Vogt et al → RBS Excavating LLC; 2015-02-12 to current/open; source msha-controller-operator-history