# Relationship history for MSHA mine 3609450

Current hierarchy: **Philip M  Koury → Koury Excavating → Koury Bank Operation**

- 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:** Koury Excavating → Koury Bank Operation; 2006-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip M  Koury → Koury Bank Operation; 2006-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip M  Koury → Koury Excavating; 2006-07-25 to current/open; source msha-controller-operator-history