# Relationship history for MSHA mine 4300645

Current hierarchy: **Charles W  Brown Sr; Charles W  Brown Jr → Browns Quarried Slate Products Inc → Browns Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Browns Quarried Slate Products Inc → Browns Quarry; 2006-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles W  Brown Sr  et al → Browns Quarry; 2006-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles W  Brown Sr  et al → Browns Quarried Slate Products Inc; 2006-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles W  Brown Jr  et al → Browns Quarried Slate Products Inc; 2006-04-18 to current/open; source msha-controller-operator-history