# Relationship history for MSHA mine 3901541

Current hierarchy: **Don J  Kocmich; Kevin J  Eben → Schultz Redi Mix LLC → Fuchs Sand**

- 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:** Schultz Ready Mix → Fuchs Sand; 2009-06-09 to 2015-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Terry L.  Schultz → Fuchs Sand; 2009-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry L.  Schultz → Schultz Ready Mix; 2009-06-09 to 2015-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Schultz Redi Mix LLC → Fuchs Sand; 2015-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Don J  Kocmich et al → Fuchs Sand; 2015-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don J  Kocmich et al → Schultz Redi Mix LLC; 2015-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin J  Eben et al → Schultz Redi Mix LLC; 2015-02-24 to current/open; source msha-controller-operator-history