# Relationship history for MSHA mine 4405489

Current hierarchy: **Roberts Kenes P Jr & Sr → Eastern Coal Company → No 7**

- 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:** Bobby Gene  Yates → No 7; 1977-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Kenes P Jr & Sr → No 7; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple Y Coal Corp → No 7; 1980-08-01 to 1984-02-22; source msha-controller-operator-history
- **controller_controls_operator:** Bobby Gene  Yates → Triple Y Coal Corp; 1980-08-01 to 1984-02-22; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Coal Company → No 7; 1984-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Kenes P Jr & Sr → Eastern Coal Company; 1984-02-23 to current/open; source msha-controller-operator-history