# Relationship history for MSHA mine 4001093

Current hierarchy: **TECO Energy Inc → Gatliff Coal Company Inc → Gatliff #4**

- 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:** TECO Energy Inc → Gatliff #4; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** James Spur Coal Company → Gatliff #4; 1950-01-01 to 1976-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Waters Coal Company → Gatliff #4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waters Coal Company → James Spur Coal Company; 1950-01-01 to 1976-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Waters Coal Company Inc → Gatliff #4; 1976-03-15 to 1988-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Alabama Electric Cooperative Inc → Gatliff #4; 1976-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alabama Electric Cooperative Inc → Waters Coal Company Inc; 1976-03-15 to 1988-02-22; source msha-controller-operator-history
- **controller_controls_mine:** John P  Baugues Sr → Gatliff #4; 1980-07-01 to 1990-10-31; source msha-controller-operator-history
- **operator_operates_mine:** James Spur Inc → Gatliff #4; 1988-02-23 to 1990-10-31; source msha-controller-operator-history
- **controller_controls_operator:** John P  Baugues Sr → James Spur Inc; 1988-02-23 to 1990-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Gatliff Coal Company Inc → Gatliff #4; 1990-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Gatliff Coal Company Inc; 1990-11-01 to current/open; source msha-controller-operator-history