# Relationship history for MSHA mine 3608510

Current hierarchy: **Thomas J  Smith → Thomas J Smith → No 11 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:** Thomas J  Smith → No 11 Mine; 1988-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thomas J Smith → No 11 Mine; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Smith → Thomas J Smith; 1995-05-01 to current/open; source msha-controller-operator-history