# Relationship history for MSHA mine 2602898

Current hierarchy: **Nevada Building Products LLC → American Eagle Ready Mix → Perkins Pit**

- 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:** Nevada Building Products LLC → Perkins Pit; 2021-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Eagle Ready Mix → Perkins Pit; 2023-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nevada Building Products LLC → American Eagle Ready Mix; 2023-11-09 to current/open; source msha-controller-operator-history