# Relationship history for MSHA mine 4002164

Current hierarchy: **Jimmy E  Hamilton → Triple I Company Inc → No 11 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Jimmy E  Hamilton et al → No 11 Surface; 1974-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple I Company Inc → No 11 Surface; 1976-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy E  Hamilton et al → Triple I Company Inc; 1976-12-01 to current/open; source msha-controller-operator-history