# Relationship history for MSHA mine 3606543

Current hierarchy: **Kline Ted → R & K Coal Company → Karew No 1**

- 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:** Kline Ted → Karew No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & K Coal Company → Karew No 1; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kline Ted → R & K Coal Company; 1977-10-01 to current/open; source msha-controller-operator-history