# Relationship history for MSHA mine 0405794

Current hierarchy: **Maurio  Wilson → Wilson Grading → Portable Plant 2**

- 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:** Maurio  Wilson → Portable Plant 2; 2009-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wilson Grading → Portable Plant 2; 2009-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maurio  Wilson → Wilson Grading; 2009-09-03 to current/open; source msha-controller-operator-history