# Relationship history for MSHA mine 2003387

Current hierarchy: **Roger  Reich → Roger Reich → Reich Sand & Gravel**

- 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:** Roger Reich → Reich Sand & Gravel; 2007-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Reich → Reich Sand & Gravel; 2007-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Reich → Roger Reich; 2007-04-26 to current/open; source msha-controller-operator-history