# Relationship history for MSHA mine 4601822

Current hierarchy: **Paul F  Thomas → T & T Energy Inc → T&T Energy Mine #1**

- 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

- **operator_operates_mine:** Reliable Coal Corp → T&T Energy Mine #1; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Brook Coal Company → T&T Energy Mine #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brook Coal Company → Reliable Coal Corp; 1950-01-01 to 1979-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Reliable Coal Corp → T&T Energy Mine #1; 1979-02-01 to 1982-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Sparta Mining Company Inc → T&T Energy Mine #1; 1979-02-01 to 1982-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Sparta Mining Company Inc → Reliable Coal Corp; 1979-02-01 to 1982-07-31; source msha-controller-operator-history
- **operator_operates_mine:** T & T Energy Inc → T&T Energy Mine #1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul F  Thomas → T&T Energy Mine #1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul F  Thomas → T & T Energy Inc; 1982-08-01 to current/open; source msha-controller-operator-history