# Relationship history for MSHA mine 4606802

Current hierarchy: **Bean F R Jr → Cedar Bend Coal Company Inc → Grace #2 Mine (Surface)**

- 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

- **controller_controls_mine:** Bean F R Jr → Grace #2 Mine (Surface); 1984-03-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Bend Coal Company Inc → Grace #2 Mine (Surface); 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bean F R Jr → Cedar Bend Coal Company Inc; 1984-06-01 to current/open; source msha-controller-operator-history