# Relationship history for MSHA mine 3610191

Current hierarchy: **Eric V  Corbin → Eric Corbin → Corbin Portable**

- 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:** Eric Corbin → Corbin Portable; 2016-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric V  Corbin → Corbin Portable; 2016-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric V  Corbin → Eric Corbin; 2016-07-19 to current/open; source msha-controller-operator-history