# Relationship history for MSHA mine 4602683

Current hierarchy: **Kennedy H T → H T Kennedy General Contractors → H T Kennedy No 1 Strip**

- 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

- **operator_operates_mine:** H T Kennedy General Contractors → H T Kennedy No 1 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kennedy H T → H T Kennedy No 1 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kennedy H T → H T Kennedy General Contractors; 1950-01-01 to current/open; source msha-controller-operator-history