# Relationship history for MSHA mine 1505225

Current hierarchy: **Rose Vivian → Mountain Clay Inc → No 7 Auger**

- 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:** Mountain Clay Inc → No 7 Auger; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rose Vivian → No 7 Auger; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rose Vivian → Mountain Clay Inc; 1950-01-01 to current/open; source msha-controller-operator-history