# Relationship history for MSHA mine 4703804

Current hierarchy: **St Croix County - WI → St Croix County Highway Department → Screener 301**

- 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

- **controller_controls_mine:** St Croix County - WI → Screener 301; 2017-07-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** St Croix County Highway Department → Screener 301; 2017-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** St Croix County - WI → St Croix County Highway Department; 2017-08-07 to current/open; source msha-controller-operator-history