# Relationship history for MSHA mine 0900320

Current hierarchy: **Larry R  Bell → Bell Stone Co → Bell Stone Co Larry Bell**

- 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:** Natural Stone Of Georgia Inc → Bell Stone Co Larry Bell; 1950-01-01 to 2003-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Maurice E Hendrix → Bell Stone Co Larry Bell; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maurice E Hendrix → Natural Stone Of Georgia Inc; 1950-01-01 to 2003-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Bell Stone Co → Bell Stone Co Larry Bell; 2003-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry R  Bell → Bell Stone Co Larry Bell; 2003-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry R  Bell → Bell Stone Co; 2003-08-29 to current/open; source msha-controller-operator-history