# Relationship history for MSHA mine 4104390

Current hierarchy: **Terry  Stringfellow → J R Sand → J R 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** J R Sand → J R Sand; 2002-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry  Stringfellow → J R Sand; 2002-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Stringfellow → J R Sand; 2002-09-05 to current/open; source msha-controller-operator-history