# Relationship history for MSHA mine 1514845

Current hierarchy: **Marcum Zora → A & T Coal Company Inc → Turkey Pen**

- 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

- **controller_controls_mine:** Seals Cecil → Turkey Pen; 1982-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marcum Zora → Turkey Pen; 1982-08-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cecil & Bob Coal Company Inc → Turkey Pen; 1984-09-01 to 1985-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Seals Cecil → Cecil & Bob Coal Company Inc; 1984-09-01 to 1985-01-06; source msha-controller-operator-history
- **operator_operates_mine:** A & T Coal Company Inc → Turkey Pen; 1985-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Zora → A & T Coal Company Inc; 1985-01-07 to current/open; source msha-controller-operator-history