# Relationship history for MSHA mine 2402655

Current hierarchy: **Don  Olmstead → Don Olmstead → Don Olmstead/Natures Edge Stone Art**

- 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:** Don Olmstead → Don Olmstead/Natures Edge Stone Art; 2013-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Don  Olmstead → Don Olmstead/Natures Edge Stone Art; 2013-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Olmstead → Don Olmstead; 2013-06-20 to current/open; source msha-controller-operator-history