# Relationship history for MSHA mine 4703577

Current hierarchy: **Guy C  Brandl → I Brandl, Inc. → Screening Plant**

- 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:** I Brandl Inc → Screening Plant; 2009-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guy C  Brandl → Screening Plant; 2009-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guy C  Brandl → I Brandl Inc; 2009-10-20 to current/open; source msha-controller-operator-history