# Relationship history for MSHA mine 3609096

Current hierarchy: **Gary W  Henry → Blue Flag Quarry → BLUE FLAG 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

- **operator_operates_mine:** Blue Flag Quarry → BLUE FLAG QUARRY; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary W  Henry → BLUE FLAG QUARRY; 2002-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary W  Henry → Blue Flag Quarry; 2002-05-30 to current/open; source msha-controller-operator-history