# Relationship history for MSHA mine 4503816

Current hierarchy: **Patricia  Thaxton → Snake River Rock → Column 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Snake River Rock → Column Pit; 2021-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patricia  Thaxton → Column Pit; 2021-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Thaxton → Snake River Rock; 2021-06-09 to current/open; source msha-controller-operator-history