# Relationship history for MSHA mine 4703932

Current hierarchy: **Brian Bishop Books → Deja Vu Trucking & Excavating LLC → Harmon**

- 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:** Deja Vu Trucking & Excavating LLC → Harmon; 2023-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian Bishop Books → Harmon; 2023-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian Bishop Books → Deja Vu Trucking & Excavating LLC; 2023-01-16 to current/open; source msha-controller-operator-history