# Relationship history for MSHA mine 3609773

Current hierarchy: **Norbert J  Dotzel Jr → Dotzel Trucking → S M Rinehimer**

- 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:** Dotzel Trucking → S M Rinehimer; 2009-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Norbert J  Dotzel Jr → S M Rinehimer; 2009-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Norbert J  Dotzel Jr → Dotzel Trucking; 2009-06-23 to current/open; source msha-controller-operator-history