# Relationship history for MSHA mine 1202163

Current hierarchy: **Vigo County-In → Vigo County Highway Department → Whitlock Gravel Pit**

- 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

- **operator_operates_mine:** Vigo County Highway Department → Whitlock Gravel Pit; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vigo County-In → Whitlock Gravel Pit; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vigo County-In → Vigo County Highway Department; 1994-06-01 to current/open; source msha-controller-operator-history