# Relationship history for MSHA mine 0504916

Current hierarchy: **Grant  Koury → Koury Real Property LLC → Koury's 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:** Koury Real Property LLC → Koury's Quarry; 2008-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Grant  Koury → Koury's Quarry; 2008-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grant  Koury → Koury Real Property LLC; 2008-08-22 to current/open; source msha-controller-operator-history