# Relationship history for MSHA mine 5001892

Current hierarchy: **State Of Alaska → Alaska Department of Transportation → Kotzebue Airport Screener**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** State Of Alaska → Kotzebue Airport Screener; 2002-05-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alaska Department of Transportation → Kotzebue Airport Screener; 2008-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Alaska → Alaska Department of Transportation; 2008-07-17 to current/open; source msha-controller-operator-history