# Relationship history for MSHA mine 2402783

Current hierarchy: **Susan  Barbisan; David  Barbisan → Gallatin Gravel LLC → Gallatin Gravel**

- 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:** Gallatin Gravel Co LLC → Gallatin Gravel; 2023-03-13 to 2023-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Rocky Mountain Concrete Inc → Gallatin Gravel; 2023-03-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rocky Mountain Concrete Inc → Gallatin Gravel Co LLC; 2023-03-13 to 2023-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Gallatin Gravel LLC → Gallatin Gravel; 2023-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Barbisan et al → Gallatin Gravel; 2023-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Barbisan et al → Gallatin Gravel LLC; 2023-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Barbisan et al → Gallatin Gravel LLC; 2023-12-01 to current/open; source msha-controller-operator-history