# Relationship history for MSHA mine 4003435

Current hierarchy: **Jennifer A  Galvez → Galvez Rock → Cordell Quarry**

- 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

- **controller_controls_mine:** Jennifer A  Galvez → Cordell Quarry; 2010-12-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Galvez Rock → Cordell Quarry; 2013-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jennifer A  Galvez → Galvez Rock; 2013-03-28 to current/open; source msha-controller-operator-history