# Relationship history for MSHA mine 4605877

Current hierarchy: **Frush James W Jr → Whitlock Coal Group Inc → Whitlock Coal Group Inc**

- 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:** Klaproth Abner H → Whitlock Coal Group Inc; 1973-07-01 to 1988-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Peerless Sales Inc → Whitlock Coal Group Inc; 1978-10-01 to 1984-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Klaproth Abner H → Peerless Sales Inc; 1978-10-01 to 1984-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Whitlock Coal Group Inc → Whitlock Coal Group Inc; 1984-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frush James W Jr → Whitlock Coal Group Inc; 1984-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frush James W Jr → Whitlock Coal Group Inc; 1984-04-30 to current/open; source msha-controller-operator-history