# Relationship history for MSHA mine 4503664

Current hierarchy: **Randy L  Arestad → North Star Sand & Gravel → North Star Sand & 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** North Star Sand & Gravel → North Star Sand & Gravel; 2009-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy L  Arestad → North Star Sand & Gravel; 2009-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy L  Arestad → North Star Sand & Gravel; 2009-06-10 to current/open; source msha-controller-operator-history