# Relationship history for MSHA mine 4502564

Current hierarchy: **State Of Washington → Washington State Department Of Transportation → State Pit - Fy 128**

- 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:** State Of Washington → State Pit - Fy 128; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Washington State Department Of Transportation → State Pit - Fy 128; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Washington → Washington State Department Of Transportation; 1978-03-09 to current/open; source msha-controller-operator-history