# Relationship history for MSHA mine 3304007

Current hierarchy: **Williams Thomas M → Jefferson Holding Inc → Junior 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Williams Thomas M → Junior No 1 Strip; 1979-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jefferson Holding Inc → Junior No 1 Strip; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Thomas M → Jefferson Holding Inc; 1985-02-01 to current/open; source msha-controller-operator-history