# Relationship history for MSHA mine 2302428

Current hierarchy: **Gasconade County - MO → Gasconade County Road Department → Portable**

- 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:** Gasconade County Road Department → Portable; 2011-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gasconade County - MO → Portable; 2011-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gasconade County - MO → Gasconade County Road Department; 2011-12-05 to current/open; source msha-controller-operator-history