# Relationship history for MSHA mine 3503847

Current hierarchy: **Roy V Moore → Moore Excavation Inc. → Chinook Yard**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Roy V Moore → Chinook Yard; 2004-11-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Moore Excavation Inc. → Chinook Yard; 2016-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy V Moore → Moore Excavation Inc.; 2016-03-17 to current/open; source msha-controller-operator-history