# Relationship history for MSHA mine 3601285

Current hierarchy: **George  Krulock → Krulock Coal Company Inc → K C C I Pit**

- 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:** Steve Krulock → K C C I Pit; 1950-01-01 to 1984-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Krulock → K C C I Pit; 1950-01-01 to 1984-07-02; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Krulock → Steve Krulock; 1950-01-01 to 1984-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Krulock Coal Company Inc → K C C I Pit; 1984-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Krulock → K C C I Pit; 1984-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Krulock → Krulock Coal Company Inc; 1984-07-03 to current/open; source msha-controller-operator-history