# Relationship history for MSHA mine 2500775

Current hierarchy: **York County - Ne → York County Department Of Roads → Pit #3**

- 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:** York County Department Of Roads → Pit #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** York County - Ne → Pit #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** York County - Ne → York County Department Of Roads; 1950-01-01 to current/open; source msha-controller-operator-history