# Relationship history for MSHA mine 4002812

Current hierarchy: **Clear Carl → Carl Clear Coal Corp → Carl Clear Coal Corp Area 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 → Carl Clear Coal Corp Area 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clear Carl → Carl Clear Coal Corp Area 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carl Clear Coal Corp → Carl Clear Coal Corp Area 4; 1982-11-01 to 1986-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Clear Carl → Carl Clear Coal Corp; 1982-11-01 to 1986-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Gatliff Coal Company Inc → Carl Clear Coal Corp Area 4; 1986-07-22 to 1986-08-13; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Gatliff Coal Company Inc; 1986-07-22 to 1986-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Carl Clear Coal Corp → Carl Clear Coal Corp Area 4; 1986-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clear Carl → Carl Clear Coal Corp; 1986-08-14 to current/open; source msha-controller-operator-history