# Relationship history for MSHA mine 1701009

Current hierarchy: **Adam N Wilkinson → Wilkinson Excavation → Wilkinson Excavation**

- 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:** Wilkinson Excavation → Wilkinson Excavation; 2018-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adam N Wilkinson → Wilkinson Excavation; 2018-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adam N Wilkinson → Wilkinson Excavation; 2018-06-28 to current/open; source msha-controller-operator-history