# Relationship history for MSHA mine 2402593

Current hierarchy: **Roy Matthew  Moen → Moen Excavation → Portable Screen Plant**

- 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:** Moen Excavation → Portable Screen Plant; 2011-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roy Matthew  Moen → Portable Screen Plant; 2011-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy Matthew  Moen → Moen Excavation; 2011-05-26 to current/open; source msha-controller-operator-history