# Relationship history for MSHA mine 4104750

Current hierarchy: **Jack R  Bandy → J & N Materials Inc → J & N Materials Inc**

- 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:** J & N Materials Inc → J & N Materials Inc; 2008-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack R  Bandy → J & N Materials Inc; 2008-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack R  Bandy → J & N Materials Inc; 2008-10-01 to current/open; source msha-controller-operator-history