# Relationship history for MSHA mine 4300467

Current hierarchy: **Alice M  Sayre → Alice M Sayre → SAYRE GRAVEL**

- 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:** Alice M Sayre → SAYRE GRAVEL; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alice M  Sayre → SAYRE GRAVEL; 1991-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alice M  Sayre → Alice M Sayre; 1991-05-01 to current/open; source msha-controller-operator-history