# Relationship history for MSHA mine 4405856

Current hierarchy: **Roberts Kenes P Jr & Sr → Eastern Coal Company → No 6 Mine**

- 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

- **controller_controls_mine:** Roberts Kenes P Jr & Sr → No 6 Mine; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Coal Company → No 6 Mine; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Kenes P Jr & Sr → Eastern Coal Company; 1982-03-01 to current/open; source msha-controller-operator-history