# Relationship history for MSHA mine 0800086

Current hierarchy: **Dorothy  Baxter → Dolomite Inc → ROCKY CREEK MINE AND MILL**

- 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:** Dolomite Inc → ROCKY CREEK MINE AND MILL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dorothy  Baxter → ROCKY CREEK MINE AND MILL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dorothy  Baxter → Dolomite Inc; 1950-01-01 to current/open; source msha-controller-operator-history