# Relationship history for MSHA mine 1601623

Current hierarchy: **Brandon  Ivey → Ivey Construction, LLC → Ivey Gravel Pit- Central**

- 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:** Ivey Construction, LLC → Ivey Gravel Pit- Central; 2026-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  Ivey → Ivey Gravel Pit- Central; 2026-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Ivey → Ivey Construction, LLC; 2026-03-17 to current/open; source msha-controller-operator-history