# Relationship history for MSHA mine 3003546

Current hierarchy: **Maurice J.  Brown → Brown Bluestone → Brown Bluestone**

- 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:** Pat Brown → Brown Bluestone; 2006-05-09 to 2009-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Brown → Brown Bluestone; 2006-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Brown → Pat Brown; 2006-05-09 to 2009-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Brown Bluestone → Brown Bluestone; 2009-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maurice J.  Brown → Brown Bluestone; 2009-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maurice J.  Brown → Brown Bluestone; 2009-08-17 to current/open; source msha-controller-operator-history