# Relationship history for MSHA mine 4601910

Current hierarchy: **Tommy Joe  Owens → T J Fuel Company Inc → No 2 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Browns Creek Coal Co → No 2 Mine; 1950-01-01 to 1975-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Browns Creek Coal Company → No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Browns Creek Coal Company → Browns Creek Coal Co; 1950-01-01 to 1975-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Tommy Joe  Owens → No 2 Mine; 1975-01-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T J Fuel Company Inc → No 2 Mine; 1975-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tommy Joe  Owens → T J Fuel Company Inc; 1975-05-19 to current/open; source msha-controller-operator-history