# Relationship history for MSHA mine 1518675

Current hierarchy: **Thomas King  Evans → Debra Lynn Coals, Inc. → Highsplint # 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Thomas King  Evans → Highsplint # 1; 1976-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Debra Lynn Coals, Inc. → Highsplint # 1; 2003-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas King  Evans → Debra Lynn Coals, Inc.; 2003-10-02 to current/open; source msha-controller-operator-history