# Relationship history for MSHA mine 3003543

Current hierarchy: **John A  Robinson → John A Robinson → Beerston Stone Products Inc**

- 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:** Beerston Stone Products Inc → Beerston Stone Products Inc; 2006-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Hughes → Beerston Stone Products Inc; 2006-05-03 to 2007-01-22; source msha-controller-operator-history
- **controller_controls_operator:** John  Hughes → Beerston Stone Products Inc; 2006-05-03 to 2007-01-22; source msha-controller-operator-history
- **controller_controls_mine:** John A  Robinson → Beerston Stone Products Inc; 2007-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John A  Robinson → Beerston Stone Products Inc; 2007-01-23 to current/open; source msha-controller-operator-history