# Relationship history for MSHA mine 1102811

Current hierarchy: **Brown John T → J J Track Mining Company Inc → Brown Bros Mine No 3**

- 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:** Brown John T → Brown Bros Mine No 3; 1972-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J J Track Mining Company Inc → Brown Bros Mine No 3; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown John T → J J Track Mining Company Inc; 1984-10-01 to current/open; source msha-controller-operator-history